[root@gateway ~]# dig -x 38.20.34.149

; <<>> DiG 9.3.6-P1-RedHat-9.3.6-4.P1.el5_4.2 <<>> -x 38.20.34.149
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 51184
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 8

;; QUESTION SECTION:
;149.34.20.38.in-addr.arpa.	IN	PTR

;; ANSWER SECTION:
149.34.20.38.in-addr.arpa. 3979	IN	PTR	vl3866.mag01.yyz01.atlas.cogentco.com.

;; AUTHORITY SECTION:
34.20.38.in-addr.arpa.	3972	IN	NS	auth5.dns.cogentco.com.
34.20.38.in-addr.arpa.	3972	IN	NS	auth1.dns.cogentco.com.
34.20.38.in-addr.arpa.	3972	IN	NS	auth2.dns.cogentco.com.
34.20.38.in-addr.arpa.	3972	IN	NS	auth4.dns.cogentco.com.

;; ADDITIONAL SECTION:
auth1.dns.cogentco.com.	10539	IN	A	66.28.0.14
auth1.dns.cogentco.com.	16447	IN	AAAA	2001:550:1:a::d
auth2.dns.cogentco.com.	7470	IN	A	66.28.0.30
auth2.dns.cogentco.com.	36815	IN	AAAA	2001:550:1:b::d
auth4.dns.cogentco.com.	157504	IN	A	80.245.32.74
auth4.dns.cogentco.com.	16447	IN	AAAA	2001:978:1:a::d
auth5.dns.cogentco.com.	147263	IN	A	80.91.64.50
auth5.dns.cogentco.com.	16447	IN	AAAA	2001:978:1:b::d

;; Query time: 38 msec
;; SERVER: 192.139.81.1#53(192.139.81.1)
;; WHEN: Fri Apr 15 20:28:05 2011
;; MSG SIZE  rcvd: 354