Robtex

Up: 199.116.144.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 199.116.148.0/23
Down right: 199.116.150.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
199.116.149.2	A+PTR	nms.american-bb.com
199.116.149.2	A+PTR	nms.unsi.net
199.116.149.3	A+PTR	pms.american-bb.com
199.116.149.3	A+PTR	pms.unsi.net
199.116.149.20	A	central.dns.unsi.net
199.116.149.25	PTR	ns2.gtt.net
199.116.149.25	A	ns2.airband.net
199.116.149.25	A	ptr1.airband.net
199.116.149.27	PTR	unsi.net
199.116.149.27	A	www.packetexchange.com
199.116.149.29	A+PTR	ns3.gtt.net
199.116.149.29	A+PTR	ns3.idcglobal.net
199.116.149.29	A	dfwns2.airband.net
199.116.149.30	PTR	ftp.gt-t.net
199.116.149.58	A	nocutils.com