RFC 3425: Obsoleting IQUERY

The IQUERY method of performing inverse DNS lookups, specified in RFC 1035, has not been generally implemented and has usually been operationally disabled…

Read RFC 3425 on the RFC Editor

Outgoing relationships (1 related RFC)

Updates — RFC 1035: Domain names - implementation and specification

Incoming relationships (4 related RFCs)

Normatively referenced by — RFC 5936: DNS Zone Transfer Protocol (AXFR)
Normatively referenced by — RFC 3467: Role of the Domain Name System (DNS)
Informatively referenced by — RFC 9499: DNS Terminology
Informatively referenced by — RFC 6195: Domain Name System (DNS) IANA Considerations