This list of DNS record types is an overview of resource records (RRs) permissible in zone files of the Domain Name System (DNS). It also contains pseudo-RRs.
Other types of records simply provide some types of information (for example, an HINFO record gives a description of the type of computer/OS a host uses), or others return data used in experimental features. The "type" field is also used in the protocol for various operations.
Progress has rendered some of the originally defined record-types obsolete. Of the records listed at IANA, some have limited use, for various reasons. Some are marked obsolete in the list, some are for very obscure services, some are for older versions of services, and some have special notes saying they are "not right".
MF
MAILA
4
254
MG
MR
MINFO
MAILB
8
9
14
253
Obsoleted by: 2050
NBSTAT
33
KEY
SIG
--
--
RP
X25
17
19
RT
NSAP
21
22
PX
EID
26
31
ATMA
APL
34
42
UID
GID
UNSPEC
101
102
103