Dig Domains
; <<>> DiG Dig.Domains <<>> any 59.196.121.91.in-addr.arpa
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 49231
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;59.196.121.91.in-addr.arpa. IN ANY

;; ANSWER SECTION:
59.196.121.91.in-addr.arpa. 21599 IN PTR ks.coredump.be.

;; Query time: 142 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Wed Jun 20 05:13:16 EDT 2018
;; MSG SIZE  rcvd: 83


Check the DNS Propagation for 59.196.121.91.in-addr.arpa