NSLookup (DNS Lookup)
This tool makes lookups and reverse lookups to DNS servers, IP/Domain and Domain/IP.
NSLookup youtube.com
; <<>> DiG 9.3.6-P1-RedHat-9.3.6-16.P1.el5_7.1 <<>> any youtube.com
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 57773
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 4, ADDITIONAL: 4
;; QUESTION SECTION:
;youtube.com. IN ANY
;; ANSWER SECTION:
youtube.com. 38166 IN NS ns2.google.com.
youtube.com. 38166 IN NS ns3.google.com.
youtube.com. 38166 IN NS ns4.google.com.
youtube.com. 38166 IN NS ns1.google.com.
;; AUTHORITY SECTION:
youtube.com. 38166 IN NS ns4.google.com.
youtube.com. 38166 IN NS ns1.google.com.
youtube.com. 38166 IN NS ns3.google.com.
youtube.com. 38166 IN NS ns2.google.com.
;; ADDITIONAL SECTION:
ns1.google.com. 34437 IN A 216.239.32.10
ns2.google.com. 34437 IN A 216.239.34.10
ns3.google.com. 34437 IN A 216.239.36.10
ns4.google.com. 34437 IN A 216.239.38.10
;; Query time: 1 msec
;; SERVER: 206.251.73.9#53(206.251.73.9)
;; WHEN: Sat May 25 16:55:01 2013
;; MSG SIZE rcvd: 228
