Check PTR record using Dig
[root@ptr ~]# dig -t MX ptrrecord.net
; <<>> DiG 9.3.4-P1 <<>> -t MX ptrrecord.net
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 27176
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 3, ADDITIONAL: 1
;; QUESTION SECTION:
;ptrrecord.net. IN MX
;; ANSWER SECTION:
ptrrecord.net. 3411 IN MX 10 mail.ptrrecord.net.
;; AUTHORITY SECTION:
ptrrecord.net. 89896 IN NS ns-01.svc.xl-internetservices.com.
ptrrecord.net. 89896 IN NS ns-02.svc.xl-internetservices.com.
ptrrecord.net. 89896 IN NS ns-03.svc.xl-internetservices.com.
;; ADDITIONAL SECTION:
mail.ptrrecord.net. 3411 IN A 83.117.170.114
;; Query time: 19 msec
;; SERVER: 85.17.41.228#53(85.17.41.228)
;; WHEN: Tue Jun 5 20:01:52 2012
;; MSG SIZE rcvd: 155
[root@ptr ~]# dig -x 83.117.170.114
; <<>> DiG 9.3.4-P1 <<>> -x 83.117.170.114
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 551
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 3, ADDITIONAL: 4
;; QUESTION SECTION:
;114.170.117.83.in-addr.arpa. IN PTR
;; ANSWER SECTION:
114.170.117.83.in-addr.arpa. 5373 IN PTR s5375aa72.adsl.wanadoo.nl.
;; AUTHORITY SECTION:
117.83.in-addr.arpa. 80500 IN NS ns.euronet.nl.
117.83.in-addr.arpa. 80500 IN NS ns.euro.net.
117.83.in-addr.arpa. 80500 IN NS ns.ripe.net.
;; ADDITIONAL SECTION:
ns.euro.net. 75562 IN A 194.134.0.12
ns.ripe.net. 10885 IN A 193.0.9.6
ns.ripe.net. 10885 IN AAAA 2001:67c:e0::6
ns.euronet.nl. 82016 IN A 194.134.0.67
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