$ dig @<resolver> 140.80.199.91.in-addr.arpa ptr

; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.23.rc1.el6_5.1 <<>> @<resolver>140.80.199.91.in-addr.arpa ptr
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 40000
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

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

;; Query time: 1 msec
;; SERVER: <resolver>#53(<resolver>)
;; WHEN: Wed Oct 22 16:08:38 2014
;; MSG SIZE  rcvd: 44

$ time host 140.80.199.91 <resolver>
;; connection timed out; no servers could be reached

real    0m12.007s
user    0m0.001s
sys 0m0.007s