# Record Resource Types

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This list of DNS resource record types is an overview of resource records permissible in zone files of the Domain Name System (DNS).

^ Type ^ Type id. (decimal) ^ Defining RFC ^ Description ^ Function ^
| A | 1 | [RFC 1035](http://tools.ietf.org/html/rfc1035) | Address record |
| AAAA | 28 | [RFC 3596](http://tools.ietf.org/html/rfc3596) | [IPv6](/glossary/i/ipv6) address record |
| AFSDB | 18 | [RFC 1183](http://tools.ietf.org/html/rfc1183) | AFS database record |
| APL | 42 | [RFC 3123](http://tools.ietf.org/html/rfc3123) | Address Prefix List |
| CAA | 257 | [RFC 6844](http://tools.ietf.org/html/rfc6844) | Certification Authority Authorization |
| CDNSKEY | 60 | [RFC 7344](http://tools.ietf.org/html/rfc7344) | Child DNSKEY |
| CDS | 59 | [RFC 7344](http://tools.ietf.org/html/rfc7344) | Child DS |
| CERT | 37 | [RFC 4398](http://tools.ietf.org/html/rfc4398) | Certificate record |
| CNAME | 5 | [RFC 1035](http://tools.ietf.org/html/rfc1035#page-12) | Canonical name record |
| DHCID | 49 | [RFC 4701](http://tools.ietf.org/html/rfc4701) | DHCP identifier |
| DLV | 32769 | [RFC 4431](http://tools.ietf.org/html/rfc4431) | DNSSEC Lookaside Validation record |
| DNAME | 39 | [RFC 6672](http://tools.ietf.org/html/rfc6672) | Alias for a name and all its subnames, unlike CNAME, which is an alias for only the exact name. |
| DNSKEY | 48 | [RFC 4034](http://tools.ietf.org/html/rfc4034) | DNS Key record |
| DS | 43 | [RFC 4034](http://tools.ietf.org/html/rfc4034) | Delegation signer |
| IPSECKEY | 45 | [RFC 4025](http://tools.ietf.org/html/rfc4025) | IPsec Key |
| KEY | 25 | [RFC 2535](http://tools.ietf.org/html/rfc2535) and [RFC 2930](http://tools.ietf.org/html/rfc2930) | Key record |
| KX | 36 | [RFC 2230](http://tools.ietf.org/html/rfc2230) | Key Exchanger record |
| LOC | 29 | [RFC 1876](http://tools.ietf.org/html/rfc1876) | Location record |
| MX | 15 | [RFC 1035](http://tools.ietf.org/html/rfc1035#page-12) and [RFC 7505](http://tools.ietf.org/html/rfc7505) | Mail exchange record |
| NAPTR | 35 | [RFC 3403](http://tools.ietf.org/html/rfc3403) | Naming Authority Pointer |
| NS | 2 | [RFC 1035](http://tools.ietf.org/html/rfc1035#page-12) | Name server record |
| NSEC | 47 | [RFC 4034](http://tools.ietf.org/html/rfc4034) | Next Secure record |
| NSEC3 | 50 | [RFC 5155](http://tools.ietf.org/html/rfc5155) | Next Secure record version 3 |
| NSEC3PARAM | 51 | [RFC 5155](http://tools.ietf.org/html/rfc5155) | NSEC3 parameters |
| PTR | 12 | [RFC 1035](http://tools.ietf.org/html/rfc1035#page-12) | Pointer record |
| RRSIG | 46 | [RFC 4034](http://tools.ietf.org/html/rfc4034) | DNSSEC signature |
| RP | 17 | [RFC 1183](http://tools.ietf.org/html/rfc1183) | Responsible Person |
| SIG | 24 | [RFC 2535](http://tools.ietf.org/html/rfc2535) | Signature |
| SOA | 6 | [RFC 1035](http://tools.ietf.org/html/rfc1035#page-12) and [RFC 2308](http://tools.ietf.org/html/rfc2308) | Start of [a zone of] authority record |
| SRV | 33 | [RFC 2782](http://tools.ietf.org/html/rfc2782) | Service locator |
| SSHFP | 44 | [RFC 4255](http://tools.ietf.org/html/rfc4255) | SSH Public Key Fingerprint |
| TA | 32768 | N/A | DNSSEC Trust Authorities |
| TKEY | 249 | [RFC 2930](http://tools.ietf.org/html/rfc2930) | Transaction Key record |
| TLSA | 52 | [RFC 6698](http://tools.ietf.org/html/rfc6698) | TLSA certificate association |
| TSIG | 250 | [RFC 2845](http://tools.ietf.org/html/rfc2845) | Transaction Signature |
| TXT | 16 | [RFC 1035](http://tools.ietf.org/html/rfc1035#page-12) | Text record |
| URI | 256 | [RFC 7553](http://tools.ietf.org/html/rfc7553) | Uniform Resource Identifier |