IFO4
Loading...Hourly charges levied by major cloud providers for the use of public IPv4 addresses, irrespective of whether the address is attached to running workload. Public IPv4 cost emerged as a meaningful bill component as IPv4 scarcity drove provider pricing. The federation requires unattached or idle public IPv4 addresses to be released within seven days unless a documented operational requirement justifies retention under UFMS-001:2.4(c). IPv6 migration plans for public-facing endpoints are tracked in the architectural debt register and reviewed annually.
A coinage of the early 2020s as AWS and other providers introduced explicit IPv4 charges; the term reflects ongoing IPv4 exhaustion economics.
Federation members run weekly idle IPv4 detection. Idle addresses older than seven days are released. IPv6 migration plans are tracked in the architectural debt register. Public IPv4 cost is reported in the FinOps inform report under MEV-Annex:3.2.
@misc{ifo4_glossary_public_ipv4_cost,
title = {{Public IPv4 Cost}},
author = {{IFO4 Federation Editorial Board}},
howpublished = {{IFO4 Federation Glossary, slug \texttt{public-ipv4-cost}}},
year = {2026},
url = {https://ifo4.org/glossary/public-ipv4-cost},
note = {Category: FinOps; key: PublicIPv4Cost}
}Federation members and accredited practitioners may challenge any entry under TGS-002:1.7. Filed challenges are routed to the editorial board, triaged into the revision register, and resolved in writing on the public docket. The slug remains stable through any revision.