Savvas Bout founded Prefixx in 2018 to make IPv4 transfers and leasing straightforward for the people who actually run networks. He brings more than 20 years of experience designing, operating and maintaining data centre infrastructure for service providers, enterprises and cloud hosters, spanning network engineering, data centre design and operations, and bare-metal cloud. He works on transfers and leases across ARIN, RIPE NCC and APNIC, and on bringing customer address space into production on the Netrouting network.
Articles by Savvas Bout
What BYOIP Includes: ROAs, IRR, LOA Explained
BYOIP covers more than an announcement. See exactly what routing paperwork, RPKI ROAs, and IRR objects are required, and...
Read → Nov 13, 2026Public IPv4 Transfer Logs: Read Them Like a Pro
ARIN, RIPE, APNIC and LACNIC publish every IPv4 transfer. Learn to read the logs, verify ownership chains, and spot red...
Read → Nov 12, 2026RIPE Temporary Transfer: Route IPv4 Without Buying
A RIPE temporary transfer lets you use IPv4 space for exactly as long as you need it. Learn how it works, what it costs,...
Read → Nov 12, 2026Transferring Legacy IPv4 Space: What to Expect
Legacy IPv4 blocks need extra vetting before any RIR transfer. Learn the paperwork, timelines and pitfalls, and how Pref...
Read → Nov 11, 2026IPv4 Chain of Title: What Every Buyer Must Verify
A broken IPv4 chain of title can block your transfer or void your claim. Learn what to check before you buy, and how Pre...
Read → Nov 10, 2026Sponsoring LIR for Provider Independent Space Explained
Hold PI space without your own LIR? A sponsoring LIR keeps your resources registered and routable. See how Prefixx handl...
Read → Nov 10, 2026Open Inter-RIR Transfer Corridors: What's Possible Now
Which inter-RIR transfer corridors are open, which stay closed, and how to move address space across ARIN, RIPE, and APN...
Read → Nov 09, 2026IPv4 Transfer Timeline: What Affects How Long It Takes
An IPv4 transfer takes one week to three months. Registry, block history, and paperwork readiness all drive the timeline...
Read → Nov 06, 2026ARIN Utilization and Leased Space: What Counts
Understand exactly what ARIN counts as utilized space, how leased blocks factor in, and how to stay compliant before you...
Read → Nov 06, 2026IPv4 Transfer Holding Period: Rules by Registry
IPv4 transfer holding periods vary by registry. Learn ARIN, RIPE NCC and APNIC rules before your deal closes, and avoid...
Read → Nov 05, 2026Who Holds Unused IPv4 Space, and Can You Buy It?
Governments, universities, and enterprises sit on vast IPv4 reserves. Learn who holds unused space, why they sell, and h...
Read → Nov 05, 2026Who Sells IPv4 Addresses: Brokers, Registries & Direct
Registries, brokers, and direct holders all sell IPv4 blocks. Learn which channel fits your timeline and budget before y...
Read →