DNS.ResourceRecordType (DNS v0.4.1)
View SourceDNS RRTypes
DNS Resource Record Type
Decimal Hex Registration Procedures Note
0 0x0000 RRTYPE zero is used as a special indicator for the SIG RR [RFC2931], [RFC4034] and in other circumstances and must never be allocated for ordinary use.
1-127 0x0000-0x007F Expert Review (see mailing list information in [RFC6895]) or Standards Action data TYPEs
128-255 0x0080-0x00FF Expert Review (see mailing list information in [RFC6895]) or Standards Action Q TYPEs, Meta TYPEs
256-61439 0x0100-0xEFFF Expert Review (see mailing list information in [RFC6895]) or Standards Action data RRTYPEs
61440-65279 0xF000-0xFEFF Reserved for future use (IETF Review required to define use)
65280-65534 0xFF00-0xFFFE Private Use
65535 0xFFFF Reserved (Standards Action)
TYPE Value Meaning Reference Template Registration Date
Reserved 0 [RFC6895] 2021-03-08
A 1 a host address [RFC1035]
NS 2 an authoritative name server [RFC1035]
MD 3 a mail destination (OBSOLETE - use MX) [RFC1035]
MF 4 a mail forwarder (OBSOLETE - use MX) [RFC1035]
CNAME 5 the canonical name for an alias [RFC1035]
SOA 6 marks the start of a zone of authority [RFC1035]
7 a mailbox domain name (EXPERIMENTAL) [RFC1035]
MG 8 a mail group member (EXPERIMENTAL) [RFC1035]
MR 9 a mail rename domain name (EXPERIMENTAL) [RFC1035]
NULL 10 a null RR (EXPERIMENTAL) [RFC1035]
WKS 11 a well known service description [RFC1035]
PTR 12 a domain name pointer [RFC1035]
HINFO 13 host information [RFC1035]
MINFO 14 mailbox or mail list information [RFC1035]
MX 15 mail exchange [RFC1035]
TXT 16 text strings [RFC1035]
RP 17 for Responsible Person [RFC1183]
AFSDB 18 for AFS Data Base location [RFC1183][RFC5864]
X25 19 for X.25 PSDN address [RFC1183]
ISDN 20 for ISDN address [RFC1183]
RT 21 for Route Through [RFC1183]
NSAP 22 for NSAP address, NSAP style A record (DEPRECATED) [RFC1706][status-change-int-tlds-to-historic]
NSAP-PTR 23 for domain name pointer, NSAP style (DEPRECATED) [RFC1706][status-change-int-tlds-to-historic]
SIG 24 for security signature [RFC2536][RFC2931][RFC3110][RFC4034]
KEY 25 for security key [RFC2536][RFC2539][RFC3110][RFC4034]
PX 26 X.400 mail mapping information [RFC2163]
GPOS 27 Geographical Position [RFC1712]
AAAA 28 IP6 Address [RFC3596]
LOC 29 Location Information [RFC1876]
NXT 30 Next Domain (OBSOLETE) [RFC2535][RFC3755]
EID 31 Endpoint Identifier [Michael_Patton][http://ana-3.lcs.mit.edu/~jnc/nimrod/dns.txt] 1995-06
NIMLOC 32 Nimrod Locator [1][Michael_Patton][http://ana-3.lcs.mit.edu/~jnc/nimrod/dns.txt] 1995-06
SRV 33 Server Selection [1][RFC2782]
ATMA 34 ATM Address [ ATM Forum Technical Committee, "ATM Name System, V2.0", Doc ID: AF-DANS-0152.000, July 2000. Available from and held in escrow by IANA.]
NAPTR 35 Naming Authority Pointer [RFC3403]
KX 36 Key Exchanger [RFC2230]
CERT 37 CERT [RFC4398]
A6 38 A6 (OBSOLETE - use AAAA) [RFC2874][RFC3226][RFC6563]
DNAME 39 DNAME [RFC6672]
SINK 40 SINK [Donald_E_Eastlake][draft-eastlake-kitchen-sink] 1997-11
OPT 41 OPT [RFC3225][RFC6891]
APL 42 APL [RFC3123]
DS 43 Delegation Signer [RFC4034]
SSHFP 44 SSH Key Fingerprint [RFC4255]
IPSECKEY 45 IPSECKEY [RFC4025]
RRSIG 46 RRSIG [RFC4034]
NSEC 47 NSEC [RFC4034][RFC9077]
DNSKEY 48 DNSKEY [RFC4034]
DHCID 49 DHCID [RFC4701]
NSEC3 50 NSEC3 [RFC5155][RFC9077]
NSEC3PARAM 51 NSEC3PARAM [RFC5155]
TLSA 52 TLSA [RFC6698]
SMIMEA 53 S/MIME cert association [RFC8162] SMIMEA/smimea-completed-template 2015-12-01
Unassigned 54
HIP 55 Host Identity Protocol [RFC8005]
NINFO 56 NINFO [Jim_Reid] NINFO/ninfo-completed-template 2008-01-21
RKEY 57 RKEY [Jim_Reid] RKEY/rkey-completed-template 2008-01-21
TALINK 58 Trust Anchor LINK [Wouter_Wijngaards] TALINK/talink-completed-template 2010-02-17
CDS 59 Child DS [RFC7344] CDS/cds-completed-template 2011-06-06
CDNSKEY 60 DNSKEY(s) the Child wants reflected in DS [RFC7344] 2014-06-16
OPENPGPKEY 61 OpenPGP Key [RFC7929] OPENPGPKEY/openpgpkey-completed-template 2014-08-12
CSYNC 62 Child-To-Parent Synchronization [RFC7477] 2015-01-27
ZONEMD 63 Message Digest Over Zone Data [RFC8976] ZONEMD/zonemd-completed-template 2018-12-12
SVCB 64 General-purpose service binding [RFC9460] SVCB/svcb-completed-template 2020-06-30
HTTPS 65 SVCB-compatible type for use with HTTP [RFC9460] HTTPS/https-completed-template 2020-06-30
Unassigned 66-98
SPF 99 [RFC7208]
UINFO 100 [IANA-Reserved]
UID 101 [IANA-Reserved]
GID 102 [IANA-Reserved]
UNSPEC 103 [IANA-Reserved]
NID 104 [RFC6742] ILNP/nid-completed-template
L32 105 [RFC6742] ILNP/l32-completed-template
L64 106 [RFC6742] ILNP/l64-completed-template
LP 107 [RFC6742] ILNP/lp-completed-template
EUI48 108 an EUI-48 address [RFC7043] EUI48/eui48-completed-template 2013-03-27
EUI64 109 an EUI-64 address [RFC7043] EUI64/eui64-completed-template 2013-03-27
Unassigned 110-248
TKEY 249 Transaction Key [RFC2930]
TSIG 250 Transaction Signature [RFC8945]
IXFR 251 incremental transfer [RFC1995]
AXFR 252 transfer of an entire zone [RFC1035][RFC5936]
MAILB 253 mailbox-related RRs (MB, MG or MR) [RFC1035]
MAILA 254 mail agent RRs (OBSOLETE - see MX) [RFC1035]
* 255 A request for some or all records the server has available [RFC1035][RFC6895][RFC8482]
URI 256 URI [RFC7553] URI/uri-completed-template 2011-02-22
CAA 257 Certification Authority Restriction [RFC8659] CAA/caa-completed-template 2011-04-07
AVC 258 Application Visibility and Control [Wolfgang_Riedel] AVC/avc-completed-template 2016-02-26
DOA 259 Digital Object Architecture [draft-durand-doa-over-dns] DOA/doa-completed-template 2017-08-30
AMTRELAY 260 Automatic Multicast Tunneling Relay [RFC8777] AMTRELAY/amtrelay-completed-template 2019-02-06
RESINFO 261 Resolver Information as Key/Value Pairs [draft-ietf-add-resolver-info-06] RESINFO/resinfo-completed-template 2023-11-02
Unassigned 262-32767
TA 32768 DNSSEC Trust Authorities [Sam_Weiler][http://cameo.library.cmu.edu/][ Deploying DNSSEC Without a Signed Root. Technical Report 1999-19, Information Networking Institute, Carnegie Mellon University, April 2004.] 2005-12-13
DLV 32769 DNSSEC Lookaside Validation (OBSOLETE) [RFC8749][RFC4431]
Unassigned 32770-65279
Private use 65280-65534
Reserved 65535