topic Registered
Verified 2026-09-19 · registry updated 2025-10-02

HTTP registry: host

Host header field of the incoming request

HTTP parameter values extend negotiation, framing, preferences, range handling, or other protocol components. host is registered in HTTP Forwarded Parameters. Defining reference: rfc7239.

httpregistryhttp-parametersforwarded

Identifier (http)

host

Host header field of the incoming request

Interpret parameters only in the context that defines them; unknown parameters must not silently change security or framing behavior.

This registry value is currently marked active by IANA. Follow the defining specification before sending, accepting, or proxying it.

IANA registry: http-parameters/forwarded

Registry reference: rfc7239

Permalink: https://merginit.com/reference/http/registry/http-parameters/forwarded/host-130