Robtex

Up: 12.45.50.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 12.45.50.0/25
Down right: 12.45.50.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
12.45.50.1	A	graylist.atmosenergy.com
12.45.50.5	A	dal00attgw000.atmosenergy.com
12.45.50.10	A+PTR	dal00pumxg000.atmosenergy.com
12.45.50.10	A	mail1.atmosenergy.com
12.45.50.21	PTR	webapps.atmosenergy.com
12.45.50.22	A	ftp.atmosenergy.com
12.45.50.24	PTR	www.atmosenergy.com
12.45.50.24	A	manageyourenergybills.com
12.45.50.24	A	atmosgathering.com
12.45.50.30	A	webmail.atmosenergy.com
12.45.50.31	A+PTR	aesonline.atmosenergy.com
12.45.50.32	A+PTR	aptonline.atmosenergy.com
12.45.50.34	PTR	myvdi.atmosenergy.com
12.45.50.41	A+PTR	securevdi.atmosenergy.com
12.45.50.41	A	myvdi.atmosenergy.com
12.45.50.47	A+PTR	ns.atmosenergy.com
12.45.50.47	A+PTR	ns1.atmosenergy.com
12.45.50.54	A	webapps.atmosenergy.com
12.45.50.54	A	webapps.gslb2.atmosenergy.com
12.45.50.57	A+PTR	www-preprod.atmosenergy.com
12.45.50.57	A	atmosenergy.com
12.45.50.57	A	www.atmosenergy.com
12.45.50.62	A+PTR	apps.atmosenergy.com
12.45.50.220	A+PTR	netmotion.atmosenergy.com
12.45.50.220	A	netmotion01.atmosenergy.com
12.45.50.220	A	dal00pnnmw000.atmosenergy.com
12.45.50.222	A	netmotion.atmosenergy.com
12.45.50.222	A	dal00pnnmw001.atmosenergy.com