Robtex

Up: 207.150.240.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 207.150.240.0/25
Down right: 207.150.240.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
207.150.240.1	A+PTR	dns1.nustream.net
207.150.240.1	A	nw1.nustream.net
207.150.240.2	A+PTR	dns2.nustream.net
207.150.240.2	PTR	nustream-dns2.nustream.net
207.150.240.2	A	nw2.nustream.net
207.150.240.4	A	nustream.net
207.150.240.4	A	nustream-dns1.nustream.net
207.150.240.6	A+PTR	nustream.com
207.150.240.6	A	mail.nustream.com
207.150.240.8	A+PTR	nustream-dns2.nustream.net
207.150.240.10	A+PTR	nustream-dns3.nustream.net
207.150.240.10	A	smtp-filter.nustream.net
207.150.240.10	A	nw3.nustream.net
207.150.240.12	A+PTR	mail.villapalmillavieques.com
207.150.240.14	PTR	tallerdefotoperiodismo.com
207.150.240.16	A+PTR	dataccesspr.com
207.150.240.16	A+PTR	mail.dataaccesspr.com
207.150.240.16	A+PTR	mail.dataccesspr.com
207.150.240.20	PTR	totalsju.com
207.150.240.20	PTR	www.csquaregroup.com
207.150.240.20	PTR	www.exotiquepr.com
207.150.240.22	A+PTR	ns-cpq02.nustream.net
207.150.240.22	A	nustream.net
207.150.240.25	PTR	backup-svr.nustream.com
207.150.240.25	PTR	backup-svr.nustream.net
207.150.240.25	PTR	dnsbl.nustream.net
207.150.240.27	A	nustream.net
207.150.240.34	A+PTR	mail.themarketingsourcepr.com
207.150.240.35	A+PTR	sp.dataaccesspr.com
207.150.240.36	A+PTR	ssl-vpn.nustream.com
207.150.240.36	PTR	vpn.nustream.com
207.150.240.39	A	mail.inteligenciaeconomica.org
207.150.240.39	A	inteligenciaeconomica.org
207.150.240.41	A	nustream-dns4.nustream.net
207.150.240.47	A+PTR	refricentro.com
207.150.240.47	A	mail.refricentro.com
207.150.240.48	A+PTR	bassettfurniturepr.com
207.150.240.48	A+PTR	mail.bassettfurniturepr.com
207.150.240.49	A+PTR	csquaregroup.com
207.150.240.49	A+PTR	mail.csquaregroup.com
207.150.240.56	PTR	popatyourneeds.com
207.150.240.57	PTR	uticorp.net
207.150.240.57	PTR	mail.uticorp.net
207.150.240.60	PTR	talk2uspr.com