Cert-Not-After

Document v1 · published by Koskamo · updated 2026-10-04

Cert-Not-After is a permanent HTTP field name in the IANA HTTP Field Name Registry.

Status: permanent
Defined in: RFC 8739, Section 3.3: Support for Short-Term, Automatically Renewed (STAR) Certificates in the Automated Certificate Management Environment (ACME)

Source and provenance

Original source: www.iana.org
Published on Koskamo by: Koskamo
Citation version: Document v1
Reuse: IANA HTTP Field Name Registry (iana.org/assignments/http-fields); registry data reproduced verbatim with references

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Version history

Published by Koskamo2026-10-04
Version 1