Robtex

Up: 121.244.56.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 121.244.56.0/24
Down right: 121.244.57.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
121.244.56.18	PTR	121.244.56.18.static.chennai.vsnl.net.in
121.244.56.18	A	mail.vijaytv.com
121.244.56.50	PTR	ldsmail.lapizdigital.com
121.244.56.50	A	email.lapizonline.com
121.244.56.50	A	lolmail.lapizonline.com
121.244.56.53	A	service007.com
121.244.56.53	A	www.service007.com
121.244.56.54	A	service007.co.in
121.244.56.203	A	mail.physicianschoice-healthcare.com
121.244.56.204	A	mail.infotronics-uk.com
121.244.56.204	A	mx.enactmedicalservices.com
121.244.56.204	A	mx.infotronics-healthcare.com
121.244.57.86	PTR	121.244.57.86.static.chennai.vsnl.net.in
121.244.57.91	A	parrywareccc.com
121.244.57.92	A	rocincrm.com
121.244.57.123	A	ms1.delphitvs.com
121.244.57.125	A+PTR	ms.delphitvs.com