Robtex

Up: 199.190.48.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 199.190.48.0/22
Down right: 199.190.52.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
199.190.48.6	A	dns1.rcwmoab.com
199.190.48.6	A	dns2.rcwmoab.com
199.190.48.92	A	mail.sdarc.us
199.190.48.92	A	sdarc.us
199.190.48.92	A	*.sdarc.us
199.190.48.123	A+PTR	mail.ecso.com
199.190.48.123	A	ecso.com
199.190.48.123	A	*.ecso.com
199.190.48.204	A	mail.cmedicsmoab.com
199.190.49.79	A	mail.s6interactive.net
199.190.49.79	A	ns1.coraorigins.com
199.190.49.79	A	mail.coraorigins.com
199.190.50.66	PTR	66-50-190-199.cust.rcwmoab.com
199.190.50.249	PTR	249-50-190-199.cust.rcwmoab.com
199.190.51.247	A	angarron.com
199.190.52.202	A+PTR	202-52-190-199.cust.rcwmoab.com
199.190.53.32	PTR	32-53-190-199.cust.rcwmoab.com