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]
MB           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       [RFC1706]
NSAP-PTR     23 for domain name pointer, NSAP style         [RFC1348] 
SIG          24 for security signature                      [RFC4034][RFC3755][RFC2535]
KEY          25 for security key                            [RFC4034][RFC3755][RFC2535]
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                      [RFC3755][RFC2535]
EID          31 Endpoint Identifier                         [Patton]
NIMLOC       32 Nimrod Locator                              [Patton]
SRV          33 Server Selection                            [RFC2782]
ATMA         34 ATM Address                                 [ATMDOC]
NAPTR        35 Naming Authority Pointer                    [RFC2915][RFC2168][RFC3403]
KX           36 Key Exchanger                               [RFC2230]
CERT         37 CERT                                        [RFC4398]
A6           38 A6 (Experimental)                           [RFC3226][RFC2874]
DNAME        39 DNAME                                       [RFC2672]
SINK         40 SINK                                        [Eastlake]
OPT          41 OPT                                         [RFC2671]
APL          42 APL                                         [RFC3123]
DS           43 Delegation Signer                           [RFC4034][RFC3658]
SSHFP        44 SSH Key Fingerprint                         [RFC4255]
IPSECKEY     45 IPSECKEY                                    [RFC4025]
RRSIG        46 RRSIG                                       [RFC4034][RFC3755]
NSEC         47 NSEC                                        [RFC4034][RFC3755]
DNSKEY       48 DNSKEY                                      [RFC4034][RFC3755]
DHCID        49 DHCID                                       [RFC4701]
NSEC3        50 NSEC3                                       [RFC5155]
NSEC3PARAM   51 NSEC3PARAM                                  [RFC5155]
Unassigned   52-54
HIP          55 Host Identity Protocol                      [RFC5205]
NINFO        56 NINFO                                       [Reid]
RKEY         57 RKEY                                        [Reid]
TALINK       58 Trust Anchor LINK                           [Wijngaards]
Unassigned   59-98
SPF          99                                             [RFC4408]
UINFO        100                                            [IANA-Reserved]
UID          101                                            [IANA-Reserved]
GID          102                                            [IANA-Reserved]
UNSPEC       103                                            [IANA-Reserved]
Unassigned   104-248
TKEY         249 Transaction Key                            [RFC2930]
TSIG         250 Transaction Signature                      [RFC2845]
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 all records                  [RFC1035]
URI          256 URI                                        [Faltstrom]
Unassigned   257-32767
TA           32768   DNSSEC Trust Authorities               [Weiler]           2005-12-13
DLV          32769   DNSSEC Lookaside Validation            [RFC4431]
Unassigned   32770-65279  
Private use  65280-65534
Reserved     65535