Robtex

Up: 220.227.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 220.227.4.0/23
Down right: 220.227.6.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
220.227.4.2	PTR	220-227-4.2.uclix.net
220.227.4.4	PTR	220-227-4.4.uclix.net
220.227.4.75	PTR	220-227-4.75.uclix.net
220.227.4.98	PTR	220-227-4.98.uclix.net
220.227.4.102	PTR	220-227-4.102.uclix.net
220.227.4.130	PTR	220-227-4.130.uclix.net
220.227.4.178	PTR	220-227-4.178.uclix.net
220.227.5.142	A	mail.ocapindia.com
220.227.6.10	PTR	mail.espire.com
220.227.6.12	PTR	email.espireinfo.com
220.227.6.20	PTR	mail.raiuniversity.edu
220.227.6.20	PTR	mail.publicpolicy.in
220.227.6.20	PTR	mail.raifoundation.org
220.227.6.21	PTR	mail.radcliffe.in
220.227.6.22	PTR	mail.\032brentwoodsinfra.com
220.227.6.22	PTR	mail.brentwoodsclub.com
220.227.6.22	PTR	mail.wellesleycorp.com
220.227.6.89	PTR	mail.aall.in
220.227.6.135	A+PTR	mail.espire.com
220.227.6.135	A	email.espireinfo.com
220.227.6.135	A	email.espire.in
220.227.6.136	A	mail.countryinn.in