{"id":1193,"date":"2026-08-06T15:32:38","date_gmt":"2026-08-06T12:32:38","guid":{"rendered":"https:\/\/www.pubconcierge.com\/blog\/?p=1193"},"modified":"2026-08-06T15:32:39","modified_gmt":"2026-08-06T12:32:39","slug":"ipv4-vs-ipv6","status":"publish","type":"post","link":"https:\/\/www.pubconcierge.com\/blog\/ipv4-vs-ipv6\/","title":{"rendered":"IPv4 vs IPv6: What\u2019s the Difference?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>IPv4 vs IPv6<\/strong> refers to the two versions of the Internet Protocol that assign addresses to connected devices and help internet traffic reach the correct destination.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IPv4 uses 32-bit addresses and supports about 4.3 billion combinations, while IPv6 uses 128-bit addresses and offers vastly more space for future growth. Most users notice little difference, but for businesses and infrastructure providers, the choice can affect compatibility, routing, scalability, and access to IP resources.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Key Takeaways<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>IPv4 uses 32-bit addresses; IPv6 uses 128-bit addresses.<\/li>\n\n\n\n<li>IPv4 offers broader compatibility.<\/li>\n\n\n\n<li>IPv6 provides far more addresses and better scalability.<\/li>\n\n\n\n<li>IPv6 is not automatically faster or more secure.<\/li>\n\n\n\n<li>Most businesses should support both during the transition.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-ub-table-of-contents-block ub_table-of-contents\" id=\"ub_table-of-contents-a2e0d911-cee2-4565-be65-d439078811ac\" data-linktodivider=\"false\" data-showtext=\"show\" data-hidetext=\"hide\" data-scrolltype=\"auto\" data-enablesmoothscroll=\"false\" data-initiallyhideonmobile=\"false\" data-initiallyshow=\"true\"><div class=\"ub_table-of-contents-header-container\" style=\"\">\n\t\t\t<div class=\"ub_table-of-contents-header\" style=\"text-align: left; \">\n\t\t\t\t<div class=\"ub_table-of-contents-title\" style=\"\">Table of Contents<\/div>\n\t\t\t\t\n\t\t\t<\/div>\n\t\t<\/div><div class=\"ub_table-of-contents-extra-container\" style=\"\">\n\t\t\t<div class=\"ub_table-of-contents-container ub_table-of-contents-1-column \">\n\t\t\t\t<ul style=\"\"><li style=\"\"><a href=\"https:\/\/www.pubconcierge.com\/blog\/ipv4-vs-ipv6\/#0-what-is-an-ip-address-\" style=\"\">What Is an IP Address?<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.pubconcierge.com\/blog\/ipv4-vs-ipv6\/#1-what-is-ipv4-\" style=\"\">What Is IPv4?<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.pubconcierge.com\/blog\/ipv4-vs-ipv6\/#2-what-is-ipv6-\" style=\"\">What Is IPv6?<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.pubconcierge.com\/blog\/ipv4-vs-ipv6\/#3-ipv4-vs-ipv6-comparison-\" style=\"\">IPv4 vs IPv6 Comparison<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.pubconcierge.com\/blog\/ipv4-vs-ipv6\/#4-key-technical-differences-\" style=\"\">Key Technical Differences<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.pubconcierge.com\/blog\/ipv4-vs-ipv6\/#5-is-ipv6-faster-or-more-secure-than-ipv4-\" style=\"\">Is IPv6 Faster or More Secure Than IPv4?<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.pubconcierge.com\/blog\/ipv4-vs-ipv6\/#6-what-are-the-risks-of-enabling-ipv6-on-a-network-\" style=\"\">What Are the Risks of Enabling IPv6 on a Network?<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.pubconcierge.com\/blog\/ipv4-vs-ipv6\/#7-can-ipv4-and-ipv6-work-together-\" style=\"\">Can IPv4 and IPv6 Work Together?<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.pubconcierge.com\/blog\/ipv4-vs-ipv6\/#8-why-is-ipv4-still-important-\" style=\"\">Why Is IPv4 Still Important?<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.pubconcierge.com\/blog\/ipv4-vs-ipv6\/#9-what-ipv4-scarcity-means-in-practice-\" style=\"\">What IPv4 Scarcity Means in Practice<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.pubconcierge.com\/blog\/ipv4-vs-ipv6\/#10-a-pubconcierge-case-study-example-\" style=\"\">A PubConcierge case-study example<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.pubconcierge.com\/blog\/ipv4-vs-ipv6\/#11-ipv4-vs-ipv6-which-one-is-better-\" style=\"\">IPv4 vs IPv6: Which One Is Better?<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.pubconcierge.com\/blog\/ipv4-vs-ipv6\/#12-frequently-asked-questions-\" style=\"\">Frequently asked questions<\/a><\/li><\/ul>\n\t\t\t<\/div>\n\t\t<\/div><\/div>\n\n\n<h2 id=\"0-what-is-an-ip-address-\" class=\"wp-block-heading\"><strong>What Is an IP Address?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">An IP address is a unique numerical identifier that helps devices find and communicate with one another across a network. You can think of it as a digital delivery address that tells internet traffic where to go and where to return.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Whenever you open a website, stream content, or use an online service, your device sends and receives data through IP addresses. They are used by computers, smartphones, servers, routers, cloud platforms, smart devices, security systems, and other internet-connected equipment.<\/p>\n\n\n\n<h2 id=\"1-what-is-ipv4-\" class=\"wp-block-heading\"><strong>What Is IPv4?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">IPv4 stands for Internet Protocol version 4. It has been a core part of internet communication for decades and remains the most familiar type of IP address.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A typical IPv4 address looks like this: 192.168.1.1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It contains four decimal numbers separated by periods. Each number can have a value between 0 and 255.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IPv4 uses a 32-bit addressing system, creating approximately 4.3 billion possible address combinations. The technical foundation of the protocol is documented in <a href=\"https:\/\/www.rfc-editor.org\/rfc\/rfc791.html\" target=\"_blank\" rel=\"noopener\">RFC 791, the original IPv4 specification<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Four billion addresses sounded like more than enough when IPv4 was developed. At the time, nobody expected billions of people to own several connected devices each.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Today, one household may have phones, laptops, smart televisions, game consoles, speakers, cameras, watches, and household appliances connected to the internet.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A large business may need thousands or millions of addresses for employees, servers, cloud workloads, customers, and infrastructure.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That is where IPv4\u2019s main limitation becomes clear: the address pool is finite.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">But, the internet did not suddenly stop working when demand exceeded the available supply of public IPv4 addresses. Network operators introduced ways to conserve them.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The most common is Network Address Translation, or NAT.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">NAT allows several devices to share one public IPv4 address. Your phone, laptop, and television may each use a private address at home, while your router presents a single public address to the wider internet.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This solution extended the useful life of IPv4, but it also added another layer for networks to manage. NAT conserves addresses; it does not create new ones.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The <a href=\"https:\/\/www.iana.org\/assignments\/ipv4-address-space\/ipv4-address-space.xhtml\" target=\"_blank\" rel=\"noopener\">IANA IPv4 Address Space Registry<\/a> shows how IPv4 space has been allocated and reserved.<\/p>\n\n\n\n<h2 id=\"2-what-is-ipv6-\" class=\"wp-block-heading\"><strong>What Is IPv6?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">IPv6 stands for Internet Protocol version 6. It was developed as the long-term successor to IPv4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IPv6 uses 128-bit addresses and provides approximately 3.4 \u00d7 10\u00b3\u2078 possible combinations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That number is difficult to put into perspective. The important point is that IPv6 provides enough address space for the continued growth of cloud platforms, mobile networks, smart cities, connected vehicles, data centers, and Internet of Things devices.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The protocol and its core differences from IPv4 are defined in the <a href=\"https:\/\/www.rfc-editor.org\/rfc\/rfc8200.html\" target=\"_blank\" rel=\"noopener\">official IPv6 specification, RFC 8200<\/a>.<\/p>\n\n\n\n<h2 id=\"3-ipv4-vs-ipv6-comparison-\" class=\"wp-block-heading\"><strong>IPv4 vs IPv6 Comparison<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">IPv4 remains widely used and supported, but its limited address space has created growing demand for more scalable solutions. IPv6 was developed to provide a much larger pool of addresses and support the continued expansion of cloud services, mobile networks, connected devices, and modern digital infrastructure.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The comparison below highlights the most important differences between IPv4 and IPv6.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.pubconcierge.com\/blog\/wp-content\/uploads\/2026\/08\/Infographic-IPv4-vs-IPv6-Comparision-PubConcierge-1-1024x683.jpg\" alt=\"\" class=\"wp-image-1195\" srcset=\"https:\/\/www.pubconcierge.com\/blog\/wp-content\/uploads\/2026\/08\/Infographic-IPv4-vs-IPv6-Comparision-PubConcierge-1-1024x683.jpg 1024w, https:\/\/www.pubconcierge.com\/blog\/wp-content\/uploads\/2026\/08\/Infographic-IPv4-vs-IPv6-Comparision-PubConcierge-1-300x200.jpg 300w, https:\/\/www.pubconcierge.com\/blog\/wp-content\/uploads\/2026\/08\/Infographic-IPv4-vs-IPv6-Comparision-PubConcierge-1-768x512.jpg 768w, https:\/\/www.pubconcierge.com\/blog\/wp-content\/uploads\/2026\/08\/Infographic-IPv4-vs-IPv6-Comparision-PubConcierge-1-1536x1024.jpg 1536w, https:\/\/www.pubconcierge.com\/blog\/wp-content\/uploads\/2026\/08\/Infographic-IPv4-vs-IPv6-Comparision-PubConcierge-1-1568x1045.jpg 1568w, https:\/\/www.pubconcierge.com\/blog\/wp-content\/uploads\/2026\/08\/Infographic-IPv4-vs-IPv6-Comparision-PubConcierge-1.jpg 1680w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 id=\"4-key-technical-differences-\" class=\"wp-block-heading\"><strong>Key Technical Differences<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Address configuration<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">IPv4 networks commonly use DHCP to assign addresses.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IPv6 can use DHCPv6, but it also supports Stateless Address Autoconfiguration, or SLAAC. This allows a device to create its own address after receiving information from a local router.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It can simplify large deployments, although administrators still need to monitor devices and control access.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>NAT<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">IPv6 generally removes the need to use NAT purely to conserve addresses.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A device can receive a globally unique IPv6 address instead of sharing one public address with several other systems. This can make end-to-end communication more direct.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That does not mean devices should be openly accessible. Firewalls, access controls, and network segmentation remain essential.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Broadcast traffic<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">IPv4 supports broadcasts, which send traffic to every device on a network segment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IPv6 replaces traditional broadcasts with multicast, which sends data only to a selected group of devices. This reduces unnecessary local traffic.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Packet handling<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">IPv4 routers may fragment packets that are too large for part of a network path.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IPv6 routers do not perform that fragmentation. The sending system is responsible for using an appropriate packet size, reducing some of the processing required from intermediate routers.<\/p>\n\n\n\n<h2 id=\"5-is-ipv6-faster-or-more-secure-than-ipv4-\" class=\"wp-block-heading\"><strong>Is IPv6 Faster or More Secure Than IPv4?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">IPv6 can be faster than IPv4, but not in every case. It may perform better when it follows a more direct route or avoids certain layers of address translation. However, IPv4 may be faster on networks with more mature routing or stronger peering relationships.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Actual performance depends on factors such as the internet provider, server location, network congestion, DNS, firewall configuration, and application support. For most home users, the difference is often too small to notice, while businesses should test both protocols across their real markets and workloads.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IPv6 is also not automatically more secure. Both IPv4 and IPv6 can use encryption, firewalls, access controls, and monitoring, but both can be exposed by poor configuration. NAT may block some unsolicited traffic in IPv4 networks, but its main purpose is address translation, not security.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IPv6 still requires properly configured firewalls, network segmentation, secure DNS, traffic monitoring, software updates, intrusion detection, and IPv6-aware security tools. The safest approach is to apply the same level of security, logging, and oversight to both protocols.<\/p>\n\n\n\n<h2 id=\"6-what-are-the-risks-of-enabling-ipv6-on-a-network-\" class=\"wp-block-heading\"><strong>What Are the Risks of Enabling IPv6 on a Network?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Enabling IPv6 without updating the network\u2019s security controls can create blind spots. A company may have strong IPv4 firewall rules while IPv6 traffic follows a different, less restrictive path. Attackers will naturally target the protocol with the weaker security policy.<br><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Before activating IPv6, businesses should confirm that their routers, firewalls, intrusion-detection systems, VPNs, endpoint-security tools, and monitoring platforms fully support IPv6. Firewall rules should protect IPv4 and IPv6 traffic consistently rather than treating IPv6 as a separate or secondary network.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Other risks include unauthorized router advertisements, Neighbor Discovery attacks, unmanaged IPv6 tunnels, incorrect access rules, and devices receiving globally reachable addresses without administrators realizing it. IPv6 is also enabled by default on many operating systems, so IPv6 traffic may already exist even in networks considered \u201cIPv4-only.\u201d<br>Businesses should therefore:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use firewalls and access-control lists that support both IPv4 and IPv6.<\/li>\n\n\n\n<li>Apply equivalent security policies to both protocols.<\/li>\n\n\n\n<li>Monitor and log IPv6 traffic.<\/li>\n\n\n\n<li>Protect Router Advertisement and Neighbor Discovery traffic.<\/li>\n\n\n\n<li>Disable unnecessary IPv6 tunnelling mechanisms.<\/li>\n\n\n\n<li>Keep endpoint firewalls and security software updated.<\/li>\n\n\n\n<li>Allow the ICMPv6 traffic required for normal network operation rather than blocking it completely.<\/li>\n<\/ul>\n\n\n\n<h2 id=\"7-can-ipv4-and-ipv6-work-together-\" class=\"wp-block-heading\"><strong>Can IPv4 and IPv6 Work Together?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">IPv4 and IPv6 are separate protocols. An IPv4-only device cannot communicate directly with an IPv6-only service without help.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Since the internet cannot change protocols all at once, several transition methods are used.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Dual Stack<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A dual-stack network runs IPv4 and IPv6 at the same time.<\/li>\n\n\n\n<li>A device can use IPv6 when it is available and fall back to IPv4 when necessary.<\/li>\n\n\n\n<li>Dual stack offers strong compatibility, but it also means operating and securing two network environments.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Tunnelling<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tunnelling places one type of network traffic inside the other protocol.<\/li>\n\n\n\n<li>For example, IPv6 packets may be transported through an IPv4 network until they reach infrastructure that supports IPv6.<\/li>\n\n\n\n<li>This can help during a transition but may make performance monitoring and troubleshooting more complicated.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Translation<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Translation services allow IPv6 systems to reach IPv4 destinations.<\/li>\n\n\n\n<li>This is useful for IPv6-only networks that still need access to older websites or applications.<\/li>\n\n\n\n<li>However, some software may need updates if it assumes every destination will have an IPv4 address.<\/li>\n<\/ul>\n\n\n\n<h2 id=\"8-why-is-ipv4-still-important-\" class=\"wp-block-heading\"><strong>Why Is IPv4 Still Important?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If IPv6 offers more addresses, why has IPv4 not disappeared?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The simple answer is compatibility.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A huge amount of global infrastructure still depends on IPv4. This includes older applications, business systems, hosting environments, internet providers, websites, customer devices, and network equipment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Replacing everything at the same time would be unrealistic.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Many companies also need IPv4 addresses for specific business requirements, including:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">hosting and cloud services, proxy infrastructure, web scraping and data collection, VPN services, telecommunications, email infrastructure, cybersecurity, ad verification, regional market testing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Companies that need additional capacity can buy address space or use <a href=\"https:\/\/www.pubconcierge.com\/blog\/ipv4-address-leasing-explained\/\">IPv4 address leasing<\/a> to access it for a defined period.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Leasing can be useful when a business wants to test a region, launch a project, add temporary capacity, or avoid the upfront cost and responsibility of purchasing address space.<\/p>\n\n\n\n<h2 id=\"9-what-ipv4-scarcity-means-in-practice-\" class=\"wp-block-heading\"><strong>What IPv4 Scarcity Means in Practice<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For most consumers, IPv4 scarcity remains hidden behind their internet provider.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Infrastructure teams face more practical questions:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Are suitable ranges available in the required country?<\/li>\n\n\n\n<li>Do the addresses have a usable reputation?<\/li>\n\n\n\n<li>Can they be routed through the existing infrastructure?<\/li>\n\n\n\n<li>Is reverse DNS available?<\/li>\n\n\n\n<li>Can the ranges be tested before deployment?<\/li>\n\n\n\n<li>Can capacity scale if demand increases?<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This is why availability alone is not enough. A technically valid IP range can still perform poorly if its reputation, geolocation, or routing history does not fit the intended use case.<\/p>\n\n\n\n<h2 id=\"10-a-pubconcierge-case-study-example-\" class=\"wp-block-heading\"><strong>A PubConcierge case-study example<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A <a href=\"https:\/\/www.pubconcierge.com\/blog\/ipv4-address-leasing-explained\">case study published by PubConcierge<\/a> describes a proxy platform expanding in Western Europe with a \/22, or 1,024 IPv4 addresses. Soon after launch, the platform experienced more CAPTCHAs, intermittent 403 and 429 errors, and a fall in successful request rates because part of the range carried inherited reputation issues.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After reputation screening, staged deployment, clearer abuse attribution, and RPKI alignment, the published case study reports that request success recovered to around 90\u201391% and CAPTCHAs fell by approximately 40% over the following 14 days.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The lesson is straightforward: selecting IPv4 resources is not just about finding an available block. Reputation, routing, attribution, and testing can directly affect production performance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Proxy businesses considering new regions can explore a similar test-first approach in <a href=\"https:\/\/www.pubconcierge.com\/blog\/ipv4-leasing-for-proxy-companies\/\">IPv4 leasing for proxy companies<\/a>.<\/p>\n\n\n\n<h2 id=\"11-ipv4-vs-ipv6-which-one-is-better-\" class=\"wp-block-heading\"><strong>IPv4 vs IPv6: Which One Is Better?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">IPv6 is the better long-term protocol. It provides the address capacity needed for the future growth of the internet and reduces dependence on address-sharing techniques.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IPv4 remains the better-supported protocol. For most organizations, this means the practical answer is not to choose only one. It is to support IPv6 while keeping IPv4 available where customers, applications, or external services still require it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A useful way to look at the decision is:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Choose IPv6 readiness for future scalability<\/li>\n\n\n\n<li>Maintain IPv4 for current compatibility<\/li>\n\n\n\n<li>Use dual stack when both are necessary<\/li>\n\n\n\n<li>Test real applications before changing network architecture<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The correct balance depends on the business, its users, its providers, and the systems it needs to reach.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Need IPv4 Resources That Fit Your Infrastructure?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IPv6 is growing, but many applications, networks, and online services still depend on IPv4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PubConcierge helps businesses access pre-tested, geo-diverse IPv4 and IPv6 resources without having to purchase address space outright. You can evaluate the IPs, confirm that they match your routing and location requirements, and review their suitability for your use case before making a longer commitment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"4-\">Whether you are expanding proxy infrastructure, supporting data collection, entering a new market, or adding dedicated address capacity, the first step should be testing, not guessing.<\/p>\n\n\n\n<p class=\"nav-contact has-background has-large-font-size\" style=\"background-color:#e60100; text-align:center\"><a href=\"javascript:;\" class=\"has-white-color has-text-color nav-contact\"><strong> Test for Free\n<\/strong><\/a><\/p>\n\n\n\n<h2 id=\"12-frequently-asked-questions-\" class=\"wp-block-heading\"><strong>Frequently asked questions<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Frequently Asked Questions<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>What is the main difference between IPv4 and IPv6?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IPv4 uses 32-bit addresses and supports around 4.3 billion combinations. IPv6 uses 128-bit addresses and provides approximately 3.4 \u00d7 10\u00b3\u2078 combinations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Is IPv6 better than IPv4?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IPv6 is better for long-term scalability and address availability. IPv4 still offers broader compatibility with existing devices, websites, applications, and networks.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Is IPv6 faster than IPv4?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IPv6 can be faster when it provides a better route or avoids certain translation layers. However, IPv4 may perform better on networks with more mature IPv4 infrastructure. Neither protocol is always faster.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Is IPv6 more secure?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IPv6 is not automatically more secure. Both IPv4 and IPv6 require firewalls, monitoring, encryption, access controls, secure configuration, and regular maintenance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Does IPv6 need NAT?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IPv6 does not normally require NAT for address conservation because it has enough addresses for devices to receive unique identifiers. Firewalls are still needed to control access.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Can IPv4 and IPv6 communicate directly?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">No. Dual stack, tunnelling, or protocol-translation technologies are needed when IPv4 and IPv6 systems must communicate.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Why do companies still need IPv4?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Many users, applications, websites, and networks still support IPv4 more consistently than IPv6. Businesses may need IPv4 to maintain compatibility, serve specific markets, or operate infrastructure such as hosting, proxy, VPN, and data platforms.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Should I disable IPv4?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Most users and businesses should not disable IPv4 without testing. Doing so may make some websites, services, devices, or applications unavailable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Will IPv6 replace IPv4?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IPv6 adoption will continue to grow, but IPv4 and IPv6 are expected to coexist for many years because of legacy infrastructure and compatibility requirements.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Legal Disclaimer<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>This article is for general informational purposes only and does not constitute legal, cybersecurity, or professional advice. Consult qualified specialists and test changes carefully before modifying IPv6, firewall, routing, DNS, or security settings. PubConcierge is not responsible for losses or disruptions resulting from reliance on this information.<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"8-\"><\/p>\n\n\n\n<p class=\"has-large-font-size wp-block-paragraph\">Stay up to date on growth infrastructure, email best practices, and startup scaling strategies by <a href=\"https:\/\/www.linkedin.com\/company\/pubconcierge\" target=\"_blank\" rel=\"noopener\"><strong>following PubConcierge on LinkedIn<\/strong><\/a><em><strong>.<\/strong><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>IPv4 vs IPv6 refers to the two versions of the Internet Protocol that assign addresses to connected devices and help internet traffic reach the correct destination. IPv4 uses 32-bit addresses and supports about 4.3 billion combinations, while IPv6 uses 128-bit addresses and offers vastly more space for future growth. Most users notice little difference, but&hellip; <a class=\"more-link\" href=\"https:\/\/www.pubconcierge.com\/blog\/ipv4-vs-ipv6\/\">Continue reading <span class=\"screen-reader-text\">IPv4 vs IPv6: What\u2019s the Difference?<\/span><\/a><\/p>\n","protected":false},"author":7,"featured_media":1194,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,39,38],"tags":[],"class_list":["post-1193","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ip-leasing","category-ipv4-ipv6","category-proxy","entry"],"featured_image_src":"https:\/\/www.pubconcierge.com\/blog\/wp-content\/uploads\/2026\/08\/PubConcierge-IPv4-vs-IPv6-Whats-the-Difference.jpg","author_info":{"display_name":"Raluca Sima","author_link":"https:\/\/www.pubconcierge.com\/blog\/author\/raluca-sima\/"},"authors":[],"_links":{"self":[{"href":"https:\/\/www.pubconcierge.com\/blog\/wp-json\/wp\/v2\/posts\/1193","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pubconcierge.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pubconcierge.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pubconcierge.com\/blog\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pubconcierge.com\/blog\/wp-json\/wp\/v2\/comments?post=1193"}],"version-history":[{"count":1,"href":"https:\/\/www.pubconcierge.com\/blog\/wp-json\/wp\/v2\/posts\/1193\/revisions"}],"predecessor-version":[{"id":1196,"href":"https:\/\/www.pubconcierge.com\/blog\/wp-json\/wp\/v2\/posts\/1193\/revisions\/1196"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.pubconcierge.com\/blog\/wp-json\/wp\/v2\/media\/1194"}],"wp:attachment":[{"href":"https:\/\/www.pubconcierge.com\/blog\/wp-json\/wp\/v2\/media?parent=1193"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pubconcierge.com\/blog\/wp-json\/wp\/v2\/categories?post=1193"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pubconcierge.com\/blog\/wp-json\/wp\/v2\/tags?post=1193"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}