IPv4 Transfer Time: ARIN, RIPE & APNIC Compared

“How long will this take?” It’s usually the first question out of a buyer’s or seller’s mouth, and honestly, it’s the right one. Waiting months for addresses throws off deployment schedules, budget planning, sometimes even the price itself. As of 2025, a typical transfer runs anywhere from a few days to several weeks. What moves the needle? The Regional Internet Registry (RIR) handling it, how complete your documentation is, and whether the receiving organization already has a working relationship with the registry. ARIN, RIPE NCC and APNIC don’t work the same way — and knowing where they differ helps you set realistic expectations instead of discovering delays the hard way. In this article, we walk through the timelines registry by registry, look at where things typically get stuck, and share a few practical steps to keep a transfer moving. Whether you’re an ISP consolidating resources or an enterprise growing its network footprint, knowing what to expect takes much of the guesswork out.

What Is the Average IPv4 Transfer Time in 2025?

Across all Regional Internet Registries, the average IPv4 transfer in 2025 takes somewhere between two and six weeks for straightforward transactions. But that range hides a lot of variation. A well-prepared transfer — clean documentation, responsive registrants — can close in as little as five business days under ARIN. A complex RIPE transfer involving legacy resources or an inactive sponsoring LIR? That can stretch past three months. We’ve seen both.

Several factors shape the total duration:

• Registry workload: ARIN and RIPE NCC both hit seasonal backlogs, particularly right after fiscal quarters close, when transaction volumes spike.
• Documentation quality: Incomplete transfer agreements, mismatched organization names, missing proof of need — these cause more delays than anything else. Every registry query adds days. Sometimes weeks.
• Resource type: Legacy holdings (pre-RIR space) often need extra verification, especially in the RIPE region.
• Third-party involvement: Transfers involving M&A documentation, court orders, or bankruptcy proceedings naturally take longer. No way around it.

Working with an experienced marketplace such as IP4 Market also compresses timelines considerably — verified sellers and pre-validated documentation mean less back-and-forth with the registries.

ARIN Transfer Timeline: Step-by-Step Process and Expectations

ARIN has a well-earned reputation as the fastest registry for IPv4 transfers. Most transactions complete in one to three weeks. The sequence looks like this:

1. Agreement and submission (days 1–3): Buyer and seller execute a transfer agreement. The recipient submits an M&A-based or specified transfer request through ARIN Online, including the signed RSA (if applicable) and justification of need for specified transfers.
2. ARIN review (days 3–10): ARIN staff verify the requesting organization’s eligibility, confirm the seller’s rights to the resources, and check that the block carries no disputes or hold status. Clean submissions usually clear in under two weeks.
3. Payment and listing update (days 10–14): Once approved, resources move to the recipient’s account, and WHOIS reflects the new holder within 24 hours.

Common ARIN Delays

What slows ARIN transfers down? Organizational data mismatches, more than anything. If the buyer’s legal entity name in ARIN Online doesn’t exactly match its registered name or DUNS record, staff will pause the request until it’s corrected. Another common (and frustrating) issue: unacknowledged Legal Registration Agreements for new ARIN organizations. These can silently stall a transfer for a week — no error message, just silence. Buyers creating a new ARIN account should complete all organizational validation steps before submitting the transfer request. Trust us on this one.

For recipients of blocks larger than a /22 under specified transfers, prepare a detailed utilization plan. ARIN may ask for justification of need, and how quickly you respond to those queries is the difference between a two-week and a two-month timeline.

RIPE NCC Transfers: Why They Often Take Longer

RIPE NCC transfers routinely take four to twelve weeks. Occasionally longer. The main reason is structural: in the RIPE region, IPv4 transfers happen between sponsoring Local Internet Registries (LIRs), which adds a layer of coordination the ARIN model simply doesn’t have. Both the transferring LIR and the receiving LIR must actively maintain their memberships — and any lapse in contract status freezes the transfer until it’s resolved.

Where does the RIPE process get stuck? A few places, mostly:

• Sponsoring LIR responsiveness: Legacy holders often work through sponsoring LIRs that are slow to act, or that have let their relationship with end members lapse.
• Inactive holder verification: RIPE requires the current holder to confirm the transfer, and tracking down administrative contacts for dormant allocations can eat up weeks.
• Legacy resource documentation: Space allocated before the RIPE NCC era may lack clean registration records, which means extra evidence of ownership.
• Registry queue times: RIPE NCC’s transfer review queue has lengthened in recent years as demand for IPv4 keeps climbing.

Longer timeline, yes. But RIPE transfers are highly reliable when handled properly, and a knowledgeable broker or marketplace partner with verified sellers can head off most of the issues that cause multi-month delays.

APNIC Transfer Timelines and Documentation Requirements

Of the three RIRs, APNIC tends to move fastest — assuming your paperwork is in order, which is a big assumption. Most completed IPv4 transfers land somewhere between two and six weeks. There’s a structural detail to keep in mind, though: the transfer has to happen between registered members, or between an account holder and a member. If your organization sits outside the region, you may need to partner with an APNIC member or become one yourself. Both sides submit a transfer request form, and then APNIC reviews whether the need is legitimate, what the history of the resources looks like, and whether the block was obtained properly in the first place.

What documentation do they want? Proof of the transfer agreement, details of the recipient’s demonstrated need (this applies when the recipient doesn’t hold sufficient resources already), and confirmation that the block isn’t tangled up in disputes or legacy claims. APNIC’s need-based evaluation is generally lighter than RIPE’s, and that’s a big part of why processing runs shorter. A /24 often clears in under a month. Larger multi-/22 deals can drag a bit longer — extra scrutiny, more files to check.

One caution worth flagging. APNIC wants the resource transfer fee paid before final approval, and any outstanding membership fees on the sending account have to be settled first. Build those prerequisites into your project schedule. Otherwise you risk a stalled transfer in the final week, which is a frustrating place to stall.

IPv4 Transfer Time Compared: ARIN vs. RIPE vs. APNIC

So why do total transfer times differ so much across registries? Less because of database processing speed than because of how deep the documentation review goes and how many pre-approval steps each registry demands.

• ARIN: Typically 4 to 8 weeks end-to-end, counting RSA and LOA preparation, M&A validation, and registry review. Incomplete point-of-contact records are the usual culprit when a request gets rejected.
• RIPE NCC: Commonly 8 to 16 weeks. Most of that time goes to contractual updates, sponsoring LIR coordination, and End User Agreement paperwork — all of which must be done before the registry request even goes in.
• APNIC: Generally 2 to 6 weeks, with need-verification and fee settlement as the main variables.

How to Speed Up Your IPv4 Transfer: Key Takeaways

Whichever registry you’re dealing with, the organizations that close transfers fastest tend to share the same habits. None of them are complicated. All of them get skipped.

1. Pre-audit your resources. Check that WHOIS/RDAP records, contact emails, and organization IDs are current before anyone signs anything.
2. Prepare legal documents in parallel. Draft purchase agreements, LOAs, and RSAs while the registry validation is underway. Not after.
3. Respond to registry queries within 24 hours. Most RIR queues reset your place if a request sits unanswered — and just like that, you’ve added weeks to your IPv4 transfer time.
4. Verify block cleanliness early. Abuse history, geolocation conflicts, leftover routing issues on the buyer side — check all of it before escrow closes.
5. Use an experienced intermediary. Marketplaces with verified sellers, escrow services, and staff who know the registries — as offered by IP4 Market — routinely cut timelines by catching documentation problems before submission rather than after.

A well-prepared transfer through ARIN, RIPE, or APNIC is predictable and, honestly, fairly low-risk. The gap between a three-week deal and a four-month ordeal almost always comes down to preparation. Working with a trusted platform like IP4 Market helps too: verified listings, competitive pricing, and someone experienced handling each step.