IPv4 Lease Renewal: What You Should Know Before the Next Term

An IPv4 lease renewal can let you keep the same IP addresses, provided the renewed agreement covers your existing block and the provider can continue supplying it. The important detail is whether you are renewing the block already in production, rather than receiving a replacement range.

Once customers have added your IPs to their allowlists and your team has configured DNS and firewall rules, those addresses become part of how the business runs. Keeping them can save a considerable amount of coordination and reconfiguration.

Before accepting an offer, ask: “Are we renewing our current IP block, or just the same amount of capacity?”

Key Takeaways

• The exact block matters. Renewing an address quantity is different from retaining the IPs your services already use.
• Address continuity and price protection are separate. You may keep the IPs while agreeing to a different rate.
• Keeping the block does not guarantee unchanged routing. A network or ASN change may require authorization updates.
• Expansion does not have to mean replacement. Additional blocks can support growth while existing addresses stay in place.
• PubConcierge leases renew monthly unless canceled with two days’ notice. Under normal circumstances, customers retain their assigned subnet.
• Switching has a cost. Lease savings need to outweigh the work of replacing production addresses.

What Is IPv4 Lease Renewal?

IPv4 lease renewal extends your agreed right to use an IP address block beyond the current contract term. The commercial terms determine which block remains available, for how long, and at what rate.

A prefix identifies the block, rather than just its size. Two /24 blocks each contain 256 addresses, but they contain different addresses. A replacement /24 therefore provides equivalent quantity, not address continuity.

This guide covers commercial address-space leasing. A DHCP lease renewal is a separate network process that extends a device’s temporary address assignment.

What Determines Whether You Can Keep the Same IPs?

The answer comes down to the agreement and the provider’s ability to continue supplying the resource. A renewal for “256 IPv4 addresses” tells you the quantity, but leaves the identity of those addresses open. Naming the existing prefix makes the distinction clear.

Continued use also depends on payment and usage requirements, along with any provisions allowing substitution, withdrawal, or nonrenewal. Where a broker coordinates space from another holder, that holder’s authorization remains part of the arrangement.

PubConcierge’s guide to customizing IP leasing agreements explains how these terms can reflect the way your business actually uses the addresses.

PubConcierge’s IPv4 Lease Renewal Policy

Automatic monthly renewal and a two-day cancellation notice

• PubConcierge IP leases automatically renew for another month unless the customer gives cancellation notice at least two days before the lease end date.

• Customers planning to move workloads should allow additional time beyond this cancellation deadline.

Keeping your existing IP block

• Under normal circumstances, customers keep their existing IP block as the lease continues. PubConcierge does not routinely swap assigned subnets; changes are made at the customer’s request.

• An exception is a shutdown required by a federal agency. In that situation, PubConcierge must remove the affected addresses from service.

Subnet swaps and exceptional situations

• For leases with a commitment period, PubConcierge can consider subnet swaps when an unexpected issue occurs. This flexibility is handled case by case and is intended for occasional issues, rather than frequent replacements.

• For month-to-month leases, customers can request a subnet swap for the next monthly term by giving notice at least two days before the current lease end date.

• Your account manager can discuss the requested swap and any technical changes needed for the transition.

Three Renewal Scenarios to Discuss With Your Provider

1. Same block, same network. If the prefix, origin Autonomous System Number (ASN), receiving infrastructure, and delivery arrangement remain unchanged, renewal may require little technical work. The existing permissions and supporting services still need to remain in place.

2. Same block, different network. You may retain the addresses while moving to another hosting provider or announcing them through a different ASN. The lease must permit that arrangement, and the receiving network must accept it. Any required authorization changes become part of the move.

3. Existing block plus additional capacity. A growing business may be able to retain its current block and lease another alongside it. Additional capacity does not have to be adjacent to the existing range, and a larger contiguous replacement may require renumbering.

The right arrangement depends on what matters most to your deployment: preserving current addresses, obtaining contiguous space, or adding capacity.

Can Routing Change Even If You Keep the Same IPs?

Yes. Keeping the addresses does not necessarily mean keeping the same network setup.

For routed address space, a Letter of Authorization (LOA), Internet Routing Registry (IRR) records, and Resource Public Key Infrastructure (RPKI) authorization support different parts of that setup.

ARIN explains that a Route Origin Authorization (ROA) identifies the ASN authorized to originate a prefix and its permitted maximum prefix length. If the originating ASN changes, the existing authorization may need updating.

A change of network can also affect IRR records, reverse DNS delegation, and any hosting or tunnel service used to deliver the block. These dependencies matter most when renewal coincides with a move.

An LOA and a ROA serve different purposes; one does not replace the other. PubConcierge’s RPKI in IP leasing guide explains the routing checks in more detail.

Does Keeping the Same IPs Preserve Reputation?

Keeping the same addresses preserves their existing history, including both useful operating history and any reputation problems. Renewal does not reset that history or guarantee acceptance by email providers, websites, or security systems.

A block that has worked well for months offers a useful performance baseline. But rising failure rates, new blocklist entries, or incorrect geographic recognition can change its value to your workload.

When performance has deteriorated, remediation or replacement may be more useful than keeping every address unchanged.

The approach in PubConcierge’s IP leasing testing guide can help your team evaluate replacement capacity or a changed deployment before committing.

Compare the Renewal Rate With the Cost of Switching

A cheaper replacement block can still cost more to adopt.

Consider engineering time, customer coordination, testing, temporary overlap charges, and potential service disruption alongside the lease rate.

Illustrative calculation: A $0.05 monthly saving per address across a /22 containing 1,024 addresses equals $51.20 per month, or $614.40 over 12 months. If the migration costs $1,000, those lease savings alone would not recover the migration expense within the first year.

These figures are an example, not a PubConcierge quote or customer result.

For a fuller cost comparison, see what affects IP leasing prices. If you are considering another supplier, use the IPv4 leasing provider comparison to evaluate continuity and support alongside price.

When Should You Start Thinking About Renewal?

The cancellation deadline is the last date to stop renewal; it is not necessarily enough time to move a production deployment.

For a complex network, a 60- to 90-day internal review window can give procurement, engineering, and customers time to coordinate. This is a planning suggestion, not a provider notice requirement. A straightforward monthly renewal may need much less preparation.

A useful renewal conversation focuses on what is changing: the price, capacity, receiving network, or service requirements. If none of those changes, the priority is continuity. If several change together, the renewal becomes a small deployment project.

What Happens If the Same Block Cannot Be Renewed?

If nonrenewal is known in advance, the remaining lease period becomes the window for arranging a replacement.

The replacement needs to work with your applications as well as your network. An agreed overlap period, where available, can give your team time to test the new block and move services gradually; its duration and charges belong in the migration plan.

Some dependencies are easy to miss. Changing DNS will not update a customer’s IP allowlist or a hard-coded address, so those systems may need separate changes.

Use of the old block ends according to the agreement, including any expressly agreed extension. A route that remains reachable after expiry does not extend your permission to use it.

Plan Your IPv4 Lease Renewal With PubConcierge

PubConcierge combines IPv4 sourcing with deployment support and account management. Its IPv4 broker and deployment guide explains how commercial terms, routing responsibilities, and workload testing fit together.

Whether you want to keep a stable deployment or add capacity, your account manager is the starting point for discussing the next term and any changes to the service.

Need to keep your current IPs or add capacity?

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Frequently Asked Questions

Does automatic renewal guarantee the same IPv4 addresses?

Across providers, this depends on the agreement. At PubConcierge, customers normally retain their assigned subnet through automatic monthly renewal. Customer-requested swaps and exceptional agency-mandated shutdowns can change that arrangement.

How much notice does PubConcierge require to cancel renewal?

Give cancellation notice at least two days before the lease end date. Otherwise, the lease automatically renews for another month.

Can I renew only part of my IPv4 block?

Potentially. It depends on the provider’s offer and whether the smaller allocation works with your routing setup. Retaining a subset may also change the price.

Can I keep my IPs while switching leasing providers?

Only if the new provider has authority to supply that exact resource and a handover is agreed. Changing the leasing supplier is different from moving the same block to another hosting network.

Does a longer lease guarantee permanent retention?

No. It can establish a longer agreed use period, subject to the contract, but it does not create indefinite use rights.

Do I need new routing records every time I renew?

Not necessarily. Existing records may remain suitable when the prefix, origin ASN, and authorization stay the same. A changed deployment may require updates.

Disclaimer: This article provides general information, not legal advice. Renewal, cancellation, and subnet changes are subject to your agreement. Customers must use leased IPs in compliance with applicable laws and acceptable-use requirements.

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