Robtex

Up: 72.215.136.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 72.215.138.0/24
Down right: 72.215.139.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.215.138.56	A	wsip-72-215-138-56.pn.at.cox.net
72.215.138.66	PTR	wsip-72-215-138-66.pn.at.cox.net
72.215.138.68	A	mail.cvptc.com
72.215.138.91	A	wsip-72-215-138-91.pn.at.cox.net
72.215.138.116	A	barracuda.panhandleortho.com
72.215.138.243	A+PTR	wsip-72-215-138-243.pn.at.cox.net
72.215.138.244	PTR	wsip-72-215-138-244.pn.at.cox.net
72.215.138.244	A	barracuda2.panhandleortho.com
72.215.139.1	PTR	wsip-72-215-139-1.pn.at.cox.net
72.215.139.37	PTR	37.911pcmedics.com
72.215.139.37	A	rdp.911pcmedics.com
72.215.139.37	A	mail1.foschini.net
72.215.139.51	PTR	wsip-72-215-139-51.pn.at.cox.net
72.215.139.143	PTR	wsip-72-215-139-143.pn.at.cox.net
72.215.139.143	A	mail.mvbargaincenter.com
72.215.139.143	A	mvbargaincenter.com
72.215.139.156	A	mail.healthystart.info
72.215.139.157	A	digitaldesignline.com
72.215.139.157	A	ns1.digitaldesignline.com
72.215.139.157	A	ns1.crippleguy.guru
72.215.139.158	PTR	wsip-72-215-139-158.pn.at.cox.net
72.215.139.158	A	digitaldesignline.com
72.215.139.158	A	ns2.digitaldesignline.com
72.215.139.159	A	petersoneng.com
72.215.139.160	PTR	wsip-72-215-139-160.pn.at.cox.net
72.215.139.160	A	petersoneng.us
72.215.139.165	PTR	wsip-72-215-139-165.pn.at.cox.net
72.215.139.165	A	ftp.henryhammond.com
72.215.139.165	A	mail.henryhammond.com
72.215.139.171	A	mail.poseidoncomputers.com
72.215.139.196	A+PTR	wsip-72-215-139-196.pn.at.cox.net
72.215.139.227	A	ecbibbidi.com
72.215.139.234	A	thegreenbranch.org