Robtex

Up: 72.53.160.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 72.53.160.0/21
Down right: 72.53.168.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.53.160.10	A	maga.accessline.com
72.53.162.20	A	dw1.devdr.accessline.com
72.53.164.13	A	eiger.accessline.com
72.53.164.47	A	appserver11.dr.accessline.com
72.53.164.69	A	onyxserv.accessline.com
72.53.164.200	PTR	www.accessline.com
72.53.164.200	A	al-help.com
72.53.164.202	PTR	www.telecomsvc.com
72.53.164.202	A	telecomsvc.com
72.53.164.206	A	digitalbusinessphonesystem.com
72.53.164.207	A	mysmartconference.com
72.53.164.208	PTR	www.tollfreenow.com
72.53.164.208	A	tollfreenow.com
72.53.164.208	A	smartcallforwarding.com
72.53.164.210	PTR	www.businessphonesolutions.com
72.53.164.211	PTR	www.findmephone.com
72.53.172.4	A+PTR	pbx.hpbx4-1.sea.telecomsvc.com
72.53.172.4	A	hpbx4-1.gslb.serverdata.net
72.53.172.6	A+PTR	pbx.hpbx020-1.sea.telecomsvc.com
72.53.172.6	A	hpbx020-1.gslb.serverdata.net
72.53.172.8	PTR	pbx.hpbx022-1.sea.telecomsvc.com
72.53.172.16	A+PTR	pbx.hpbx030-1.sea.telecomsvc.com
72.53.172.16	A	hpbx030-1.gslb.serverdata.net
72.53.172.74	PTR	phoneprov.telecomsvc.com
72.53.172.74	A	phoneprov.gslb.serverdata.net
72.53.172.101	A+PTR	presence01-1.sea.telecomsvc.com
72.53.172.101	A	presence01.gslb.serverdata.net
72.53.172.102	A+PTR	presence01-2.sea.telecomsvc.com
72.53.172.102	A	presence01.gslb.serverdata.net
72.53.172.104	PTR	presence03-2.sea.telecomsvc.com
72.53.172.104	A	presence03.gslb.serverdata.net
72.53.172.106	PTR	presence05-2.sea.telecomsvc.com
72.53.173.7	PTR	hpbx021-1.va.telecomsvc.com
72.53.173.7	A	hpbx021-1.gslb.serverdata.net
72.53.173.9	A+PTR	pbx.hpbx023-1.va.telecomsvc.com
72.53.173.9	A	hpbx023-1.gslb.serverdata.net
72.53.173.11	A+PTR	pbx.hpbx025-1.va.telecomsvc.com
72.53.173.13	PTR	pbx.hpbx027-1.va.telecomsvc.com
72.53.173.17	A+PTR	pbx.hpbx031-1.va.telecomsvc.com
72.53.173.17	A	hpbx031-1.gslb.serverdata.net
72.53.173.20	A+PTR	pbx.hpbx033-1.va.telecomsvc.com
72.53.173.20	A	hpbx033-1.gslb.serverdata.net
72.53.173.21	PTR	pbx.hpbx035-1.va.telecomsvc.com
72.53.173.69	A+PTR	hpbx021-1.va.accessline.com
72.53.173.69	A	hpbx021-1.va.telecomsvc.com
72.53.173.74	A+PTR	phoneprov-1.va.telecomsvc.com
72.53.173.74	A	phoneprov.gslb.serverdata.net
72.53.175.11	PTR	calea.accessline.com
72.53.175.53	A	ast-sv.intermedia.net