

Responsible Person (RP) records for a domain (RFC 1183) 
Lookup Andrew File System Database (AFSDB) records (RFC 1183) 
Lookup Public Switched Data Networks (X25) records (RFC 1183) 
Lookup Service Location (SRV) records (RFC 2052) 
Lookup Integrated Services Digital Network (ISDN) records (RFC 1183) 
Lookup Key Exchanger (KX) records (RFC 2230) 
Lookup Location Information (LOC) records (RFC 1876) 
Lookup Naming Authority Pointer (NAPTR) records (RFC3403) 
Lookup OSI-style NSAP records in the DNS (RFC 1706) 
Lookup Pointer to NSAP (NSAPPTR) records (RFC 1348) 
Lookup Next Domain (NXT) records (RFC 2065) 
The ability to map X.400/RFC822 mail mapping (PX) information (RFC 2163) 
The ability to lookup intermediate host that routes packets (RT) to a destination host (RFC 1183) 
Lookup authentication Signature (SIG) records (RFC 2931) 
Lookup Public Key (KEY) associated with a DNS (RFC 2535) 
Lookup Lists of Address Prefixes (APL) records (RFC 3123) 
Lookup Geographical Position (GPOS) records (RFC 1712) 
Lookup Certificate (CERT) records (RFC 2538) 
The ability to map ATM address (ATMA) to name (RFC 1183) 
Lookup Transaction Signature (TSIG) records for authentication (RFC 2930) 
Lookup Secret Key Transaction Authentication (TKEY) records for DNS (RFC 2845) 
Lookup all records for a given domain (RFC 1035). 

