RFC 2671: Extension Mechanisms for DNS (EDNS0)

The Domain Name System's wire protocol includes a number of fixed fields whose range has been or soon will be exhausted and does not allow clients to…

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Outgoing relationships (1 related RFC)

Informative reference — RFC 1035: Domain names - implementation and specification

Incoming relationships (23 related RFCs)

Obsoleted by, Normatively referenced by — RFC 6891: Extension Mechanisms for DNS (EDNS(0))
Normatively referenced by — RFC 4033: DNS Security Introduction and Requirements
Normatively referenced by — RFC 5625: DNS Proxy Implementation Guidelines
Normatively referenced by — RFC 4795: Link-local Multicast Name Resolution (LLMNR)
Normatively referenced by — RFC 5936: DNS Zone Transfer Protocol (AXFR)
Normatively referenced by — RFC 3467: Role of the Domain Name System (DNS)
Normatively referenced by — RFC 5358: Preventing Use of Recursive Nameservers in Reflector Attacks
Normatively referenced by — RFC 5507: Design Choices When Expanding the DNS
Informatively referenced by — RFC 5891: Internationalized Domain Names in Applications (IDNA): Protocol
Informatively referenced by — RFC 6762: Multicast DNS
Informatively referenced by — RFC 5894: Internationalized Domain Names for Applications (IDNA): Background, Explanation, and Rationale
Informatively referenced by — RFC 6709: Design Considerations for Protocol Extensions
Informatively referenced by — RFC 3110: RSA/SHA-1 SIGs and RSA KEYs in the Domain Name System (DNS)
Informatively referenced by — RFC 3225: Indicating Resolver Support of DNSSEC
Informatively referenced by — RFC 4343: Domain Name System (DNS) Case Insensitivity Clarification
Informatively referenced by — RFC 2672: Non-Terminal DNS Name Redirection
Informatively referenced by — RFC 4702: The Dynamic Host Configuration Protocol (DHCP) Client Fully Qualified Domain Name (FQDN) Option
Informatively referenced by — RFC 6864: Updated Specification of the IPv4 ID Field
Informatively referenced by — RFC 2673: Binary Labels in the Domain Name System
Informatively referenced by — RFC 3755: Legacy Resolver Compatibility for Delegation Signer (DS)
Informatively referenced by — RFC 6195: Domain Name System (DNS) IANA Considerations
Informatively referenced by — RFC 9715: IP Fragmentation Avoidance in DNS over UDP
Informatively referenced by — RFC 8906: A Common Operational Problem in DNS Servers: Failure to Communicate