Robtex

Up: 12.156.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 12.156.4.0/23
Down right: 12.156.6.0/23

IP	Type	Hostname
12.156.4.0	A+PTR	0.4.9c0c.static.theplanet.com
12.156.4.160	A	a0.4.9c0c.static.theplanet.com
12.156.4.188	A+PTR	bc.4.9c0c.static.theplanet.com
12.156.4.189	A+PTR	bd.4.9c0c.static.theplanet.com
12.156.4.191	A+PTR	bf.4.9c0c.static.theplanet.com
12.156.4.208	PTR	mail2.comp-connections.com
12.156.4.225	A	e1.4.9c0c.static.theplanet.com
12.156.4.227	A	e3.4.9c0c.static.theplanet.com
12.156.4.239	A	ef.4.9c0c.static.theplanet.com
12.156.4.246	A	f6.4.9c0c.static.theplanet.com
12.156.4.252	A	fc.4.9c0c.static.theplanet.com
12.156.4.253	A	fd.4.9c0c.static.theplanet.com
12.156.5.56	PTR	dnsrequest.com
12.156.5.254	PTR	larry.123dial.com
12.156.6.0	A+PTR	0.6.9c0c.static.theplanet.com