Robtex

Up: 66.196.192.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 66.196.200.0/22
Down right: 66.196.204.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.196.200.11	PTR	sbtexas.com
66.196.200.12	PTR	sbtexas.com
66.196.200.13	PTR	sbtexas.com
66.196.200.21	A+PTR	aradalexch01.aradallas.com
66.196.200.21	PTR	aradalexch01.arausa.com
66.196.200.22	PTR	aradalexch01.aradallas.com
66.196.200.22	PTR	aradalexch01.arausa.com
66.196.200.22	A	mail.aradallas.com
66.196.200.58	PTR	clamail.com
66.196.200.58	PTR	mail.calcodevelopment.com
66.196.200.58	PTR	mail.claestateservices.com
66.196.200.59	PTR	quest-grp.com
66.196.200.59	PTR	questcs.com
66.196.200.98	PTR	bearcreekfamilydentistry.com
66.196.200.98	A	remote.bearcreekfamilydentistry.com
66.196.200.100	A+PTR	mail.bearcreekfamilydentistry.com
66.196.200.102	A	mail.bltmgmt.com
66.196.200.102	A	mailsrvr1.bltmgmt.com
66.196.200.114	PTR	cust1dallasdoors.logixcom.net
66.196.200.114	A	mail2.dallasdoors.com
66.196.200.138	A	arlgpnep.com
66.196.200.147	A	cccrmdev.com
66.196.200.150	A	markitr.com
66.196.200.153	A	educationalpaymentsolutions.com
66.196.200.153	A	enfeed.me
66.196.200.250	PTR	mailhost.ecapteach.com
66.196.200.250	A	ecapteach.com
66.196.200.250	A	teacher-texas.com
66.196.201.6	A	mail.dlcollinsassociates.com
66.196.201.10	A	cleannetdfw.com
66.196.201.10	A	gweb.cleannetdfw.com
66.196.201.18	A	americanbar.com
66.196.201.19	A	helpme321.com
66.196.201.35	A	mail.kwsmfg.com
66.196.201.35	A	remote.kwsmfg.com
66.196.201.86	A+PTR	remote.mendedhearts.org
66.196.201.86	A+PTR	mail.mendedlittlehearts.org
66.196.201.86	A	mail.mendedhearts.org
66.196.201.147	PTR	mail2.eulessaero.com
66.196.201.147	A	mail.aerotechholdings.com
66.196.201.147	A	mail.aervit.com
66.196.201.206	A+PTR	remote.weismann.com
66.196.201.206	A	weismann.com
66.196.201.206	A	mail.weismann.com
66.196.201.226	A	danglingjewels.com
66.196.201.226	A	shootsportingclays.com
66.196.201.226	A	glyphlink.com
66.196.201.227	A+PTR	mail.gmsx.net
66.196.202.74	A	mail.csgcompanies.com
66.196.202.74	A	mail.csghullbenefits.com
66.196.202.115	A	mail.anthonyproperties.com
66.196.202.122	A	mail2.dreamjob.com
66.196.202.122	A	webmail.dreamjob.com
66.196.202.122	A	dreamjob.com
66.196.202.146	A	mail.prestigewinecellars.com
66.196.202.147	A+PTR	remote.prestigewinecellars.com
66.196.202.209	A+PTR	lnspdc.lnspc.com
66.196.202.210	A	mail.lnspc.com
66.196.202.234	A	mail.bibbybrilling.com
66.196.202.253	PTR	mailhost.jtchapman.com
66.196.203.1	A	dallas.cust1223.logixcom.net
66.196.203.18	A	mail.leetexllc.com
66.196.203.19	A	mail.leetexgroup.com
66.196.203.19	A	office.leetexgroup.com
66.196.203.41	A	router.americanlightingassoc.com
66.196.203.42	A+PTR	mail.americanlightingassoc.com
66.196.203.75	PTR	webmail.cplalaw.com
66.196.203.114	A	smtp.ntxsoccer.org
66.196.203.139	A	valu-edge.net
66.196.203.195	PTR	server.garlandchamber.com
66.196.203.228	A	portal-nr.com
66.196.204.66	A	mail.gecscales.com
66.196.204.89	PTR	directbuyinc.com
66.196.204.138	A	*.lcnstechs.com
66.196.204.138	A	mail.lcnstechs.com
66.196.205.50	A	mail.ffhm.com
66.196.205.58	A	mail.crb-law.com
66.196.205.133	A	springvalleydentistry.com
66.196.205.178	PTR	dynatronsoftware.com
66.196.205.178	A	www.roamsdata.com
66.196.205.178	A	webadvisorq.com
66.196.205.185	A	dynatronsoftware.net
66.196.205.188	A	po.dynatronsoftware.com
66.196.205.215	PTR	mail.bylerrivet.com
66.196.206.158	PTR	apaservices.net
66.196.206.162	A	mail.sandlerpools.com
66.196.206.210	PTR	grayhawkins.com
66.196.207.2	PTR	gweb.dacedace.com
66.196.207.18	A	mail.thermacor.com
66.196.207.58	A	*.digitalmediawarehouse.com
66.196.207.90	A	mail1.russellpllc.com
66.196.207.90	A	mail.russellpllc.com
66.196.207.186	PTR	mx.l2labs.com
66.196.207.186	A	gridsupercomputer.com
66.196.207.186	A	www.itnetworks.net