How to Check IPv4 Address Transfer History Before Using a Prefix
A practical guide to checking IPv4 transfer records, registry data, routing history and supporting documentation before using a prefix.
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Understand the internet. Question who controls it.
What happens after you click a link? Who can change the rules your network depends on? Explore the technology, the power behind it, and the choices that follow.
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164 articles
BGP Rehoming: Why an IPv4 Prefix Changes Origin ASN
Why an IPv4 prefix can change origin ASN without changing holder, and how to check BGP, RPKI, IRR and registry state.
Inter-RIR IPv4 Transfers: What Moving Between Regions Actually Means
A reader-friendly analysis of 2026 inter-RIR IPv4 transfers, regional movement, portability, registry state and operator checks.
IPv4 Has a Lifecycle: What Registry Data Can and Cannot Show
A plain-language guide to the IPv4 lifecycle: transfers, reuse, routing, RPKI, leasing, history and what registry data cannot show.
Registry-State Export: How to Make Internet Number Records Recoverable
What registry-state export means, why RDAP alone is not enough, and how authenticated records support continuity for IPv4, IPv6 and ASNs.
What Does Proof of Control Mean for an IP Address?
Proof of control for an IP address is action-specific: separate registry records, routing, RPKI, contracts and audit evidence before changing a running network.
APNIC explained: what it does, what it controls, and why it matters
A beginner’s guide to APNIC’s number resources, registry services, institutional limits, and Lu Heng’s case for accountable, replaceable Internet coordination.
Why Clear Operational Records Matter in IP Address Leasing
Leased IP space spans holders, users, routes, RPKI and reverse DNS. Clear records keep responsibility legible through provider changes and lease endings.
What AI Companies Should Know About IP Address Governance
AI companies depend on IP addresses, ASNs and routing security. Protect network identity, continuity and the option to replace a failing administrator.
What Happens When a Business Loses Its Public IP?
A public IP connects DNS, routing, email, security rules and partner trust. Losing it can break digital services long after a replacement address is assigned.
When an IPv4 Provider Fails: What Leased IPv4 Depends On
Leased IPv4 can keep routing while control, renewal and migration paths fail. Learn what to verify before provider failure becomes a business continuity incident.
When a Registry Record Changes Without Warning: A Practical Response
An unexpected registry change can affect routing, security, customers and the evidence of control. Use this response path to separate a bad record from a bad route and prepare a real exit.