DNS, the Domain Name System, is a naming system and network protocol for computers and machines that are connected to a network.

The Original RFCs

RFC 1035 holds the technical specification of DNS packets, including the wire format. RFC 1034 is a more general overview of domain names.

DNS Best Practices

DNS over TCP

Additional RFCs

AAAA records and IPv6

AXFR and IXFR records

CAA records

DNAME records

EDNS(0) and OPT records

LOC records

NSAP records

SRV records

SVCB and HTTPS records

URI records

DNSSEC and DNS Security

DNS over TLS and HTTPS

Authenticated Updates and TSIG Records

Legacy RFCs

DNS Parameter Numbers

IANA also maintains the lists of parameter numbers for DNS.