nslookup


nslookup

(networking)A Unix utility program, originally by AndrewCherenson, for querying Internet domain name servers. Thebasic use is to find the IP address corresponding to agiven hostname (or vice versa). By changing the query type(e.g. "set type=CNAME") other types of information can beobtained including CNAME - the canonical name for an alias;HINFO - the host CPU and operating system type; MINFO -mailbox or mail list information; MX - mail exchangerinformation; NS - the name server for the named zone; PTR -the hostname if the query is an IP address, otherwisethe pointer to other information; SOA the domain'sstart-of-authority information; TXT - text information; UINFO- user information; WKS - supported well-known services.Other types (ANY, AXFR, MB, MD, MF, NULL) are described inRFC 1035.

ftp://src.doc.ic.ac.uk/computing/operating-systems/unix/bsd-sources/usr.sbin/named/tools/nslookup/.

NSLOOKUP

(Name Server LOOKUP) A utility program that displays the IP address of a hostname or the hostname of an IP address by querying the domain name system (DNS) server. Originating in the Unix world, there are NSLOOKUP programs for Windows and all operating systems that support IP networks. See IPCONFIG and DNS.