root@localhost [ ~ ]# dig -x 192.168.1.11
; <<>> DiG 9.10.4-P1 <<>> -x 192.168.1.11
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 59330
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;11.1.168.192.in-addr.arpa. IN PTR
;; ANSWER SECTION:
11.1.168.192.in-addr.arpa. 3600 IN PTR vS-vCenter1.dpsi.jp.
;; Query time: 0 msec
;; SERVER: 192.168.1.1#53(192.168.1.1)
;; WHEN: Mon Nov 28 18:58:34 UTC 2016
;; MSG SIZE rcvd: 87
Only 1 DNS server which is 192.168.1.1 and it returns the correct results. Not sure why it isn't working.