Dns Records

RR

Value

Description

A

1

IPv4 Address record. An IPv4 address for a host.

AAAA

28

IPv6 Address record. An IPv6 address for a host. Current IETF recommendation for IPv6 forward-mapped zones.

A6

38

Experimental. Forward mapping of IPv6 addresses. An IP address for a host within the zone.

AFSDB

18

Location of AFS servers. Experimental - special apps only.

CNAME

5

Canonical Name. An alias name for a host.

DNAME

39

Experimental. Delegation of reverse addresses (primarily IPv6).

DNSKEY

48

DNSSEC.bis. DNS public key RR.

DS

39

DNSSEC.bis. Delegated Signer RR.

HINFO

13

Host Information - optional text data about a host.

ISDN

20

ISDN address. Experimental = special applications only.

KEY

25

Public key associated with a DNS name.

LOC

29

Stores GPS data. Experimental - widely used.

MX

15

Mail Exchanger. A preference value and the host name for a mail server/exchanger that will service this zone. RFC 974 defines valid names.

NAPTR

2

Naming Authority Pointer Record. Goss misnomer. General purpose definition of rule set to be used by applications e.g. VoIP

NS

2

Name Server. Defines the authoritative name server(s) for the domain (defined by the SOA record) or the subdomain.

NSEC

47

DNSSEC.bis. Next Secure record. Ssed to provide proof of non-existence of a name.

NXT

30

DNSSEC Next Domain record type. Obsolete use NSEC.

PTR

12

IP address (IPv4 or IPv6) to host. Used in reverse maps.

RP

17

Information about responsible person. Experimental special apps only.

RRSIG

46

DNSSEC.bis. Signed RRset.

RT

21

Through-route binding. Experimental - special apps only.

SOA

6

Start of Authority. Defines the zone name, an e-mail contact and various time and refresh values applicable to the zone.

SRV

33

Defines services available in zone e.g. ldap, http etc..

SIG

24

DNSSEC. Signature - contains data authenticated in a secure DNS. RFC 2535.

TXT

16

Text information associated with a name. The SPF record is defined using a TXT record but is not (July 2004) an IETF RFC.

WKS

11

Well Known Services. Deprecated in favour of SRV.

X25

19

X.25 address. Experimental - special apps only.