Robtex

Up: 27.251.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 27.251.16.0/22
Down right: 27.251.20.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
27.251.16.21	A	mail1.easunreyrolle.com
27.251.16.22	A+PTR	mail.easunreyrolle.com
27.251.16.22	A	mail1.easunreyrolle.net
27.251.16.136	PTR	abs-static-136.16.251.27.aircel.co.in
27.251.16.178	PTR	abs-static-178.16.251.27.aircel.co.in
27.251.16.222	PTR	abs-static-222.16.251.27.aircel.co.in
27.251.17.2	PTR	aircel-gprs-2.17.251.27.aircel.co.in
27.251.18.122	PTR	abs-static-122.18.251.27.aircel.co.in
27.251.18.163	PTR	e-mudhra.com
27.251.18.194	A	mymail1.nicelimited.com
27.251.20.3	PTR	abs-static-3.20.251.27.aircel.co.in
27.251.20.11	A+PTR	qel.co.in
27.251.20.11	A	mail.qel.co.in
27.251.20.35	PTR	abs-static-35.20.251.27.aircel.co.in
27.251.20.51	PTR	abs-static-51.20.251.27.aircel.co.in
27.251.20.58	PTR	abs-static-58.20.251.27.aircel.co.in
27.251.20.66	PTR	lls.co.in
27.251.20.67	PTR	abs-static-67.20.251.27.aircel.co.in
27.251.20.80	PTR	abs-static-80.20.251.27.aircel.co.in
27.251.20.96	PTR	abs-static-96.20.251.27.aircel.co.in
27.251.20.98	PTR	abs-static-98.20.251.27.aircel.co.in
27.251.20.107	PTR	abs-static-107.20.251.27.aircel.co.in
27.251.20.138	PTR	abs-static-138.20.251.27.aircel.co.in
27.251.20.154	PTR	abs-static-154.20.251.27.aircel.co.in
27.251.20.160	PTR	abs-static-160.20.251.27.aircel.co.in
27.251.20.162	PTR	abs-static-162.20.251.27.aircel.co.in
27.251.20.171	PTR	abs-static-171.20.251.27.aircel.co.in
27.251.20.180	A	mail.prpexports.com
27.251.20.183	A	prpexports.com
27.251.20.211	PTR	abs-static-211.20.251.27.aircel.co.in
27.251.20.217	PTR	abs-static-217.20.251.27.aircel.co.in
27.251.20.224	PTR	abs-static-224.20.251.27.aircel.co.in
27.251.20.235	PTR	abs-static-235.20.251.27.aircel.co.in
27.251.21.101	PTR	abs-static-101.21.251.27.aircel.co.in
27.251.21.101	A	sgssys.info
27.251.21.104	PTR	abs-static-104.21.251.27.aircel.co.in
27.251.21.104	A	mail.majesticpeopleinfotech.net
27.251.21.104	A	mail.sgsit.net
27.251.21.105	A	mail.softwareglobalsolutions.com
27.251.21.114	PTR	aircel-gprs-114.21.251.27.aircel.co.in
27.251.22.44	A	mgtathya-solutions.com
27.251.22.84	A	bhalokaaj.com
27.251.22.84	A	mail.bhalokaaj.com
27.251.22.108	A	mail.nalcoindia.com
27.251.23.1	PTR	abs-static-1.23.251.27.aircel.co.in
27.251.23.19	PTR	abs-static-19.23.251.27.aircel.co.in
27.251.23.24	PTR	abs-static-24.23.251.27.aircel.co.in
27.251.23.27	PTR	abs-static-27.23.251.27.aircel.co.in
27.251.23.35	PTR	abs-static-35.23.251.27.aircel.co.in
27.251.23.41	PTR	abs-static-41.23.251.27.aircel.co.in
27.251.23.43	PTR	abs-static-43.23.251.27.aircel.co.in
27.251.23.48	PTR	abs-static-48.23.251.27.aircel.co.in
27.251.23.50	PTR	abs-static-50.23.251.27.aircel.co.in
27.251.23.57	PTR	abs-static-57.23.251.27.aircel.co.in
27.251.23.59	PTR	abs-static-59.23.251.27.aircel.co.in
27.251.23.74	PTR	abs-static-74.23.251.27.aircel.co.in
27.251.23.97	PTR	abs-static-97.23.251.27.aircel.co.in
27.251.23.120	PTR	abs-static-120.23.251.27.aircel.co.in
27.251.23.123	PTR	abs-static-123.23.251.27.aircel.co.in
27.251.23.130	PTR	abs-static-130.23.251.27.aircel.co.in
27.251.23.160	PTR	abs-static-160.23.251.27.aircel.co.in
27.251.23.176	PTR	abs-static-176.23.251.27.aircel.co.in
27.251.23.177	PTR	abs-static-177.23.251.27.aircel.co.in
27.251.23.195	PTR	abs-static-195.23.251.27.aircel.co.in
27.251.23.240	PTR	abs-static-240.23.251.27.aircel.co.in