Robtex

Up: 66.180.96.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 66.180.100.0/23
Down right: 66.180.102.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.180.100.42	PTR	battalion.cascfm.com
66.180.100.42	PTR	66-180-100-42.customerip.birch.net
66.180.100.42	A	mail.united1labs.com
66.180.100.58	A	mail.dabinc.com
66.180.100.122	A+PTR	mailhost.robisoncpa.com
66.180.100.142	PTR	fs1.criteriondp.com
66.180.100.142	PTR	mail.criteriondp.com
66.180.100.142	A+PTR	66-180-100-142.customerip.birch.net
66.180.100.213	PTR	spmfg.com
66.180.100.213	A+PTR	66-180-100-213.customerip.birch.net
66.180.100.226	A+PTR	mail.lenders-data.com
66.180.100.226	PTR	66-180-100-226.customerip.birch.net
66.180.100.226	A	mail.l-i-a.com
66.180.101.18	PTR	cmcns.com
66.180.101.18	PTR	mail.cmcns.com
66.180.101.18	A	garrettranch.net
66.180.101.30	PTR	cmcns.com
66.180.101.30	PTR	mail.cmcns.com
66.180.101.30	A+PTR	66-180-101-30.customerip.birch.net
66.180.101.60	PTR	www.samsungassets.com
66.180.101.146	A+PTR	mail.tjmfuneral.com
66.180.101.146	PTR	66-180-101-146.customerip.birch.net
66.180.101.146	A	mail.ridgeviewflorist.com
66.180.101.147	A+PTR	remote.tjmfuneral.com
66.180.101.147	PTR	66-180-101-147.customerip.birch.net
66.180.101.151	PTR	wigant.com
66.180.101.151	A+PTR	66-180-101-151.customerip.birch.net
66.180.101.170	PTR	sbs.bishar.com
66.180.101.170	A+PTR	66-180-101-170.customerip.birch.net
66.180.101.174	PTR	alliancesportsgroup.net
66.180.101.174	A	dfwwarehousesales.com
66.180.101.174	A	mail.alliancesportsgroup.net
66.180.101.206	A+PTR	mail.spijlp.com
66.180.101.206	PTR	66-180-101-206.customerip.birch.net
66.180.101.209	PTR	clearlinx.com
66.180.101.209	A+PTR	66-180-101-209.customerip.birch.net
66.180.101.245	A	ns1.dreamlab.com
66.180.101.246	PTR	mail.cole-us.com
66.180.101.246	A	66-180-101-246.customerip.birch.net
66.180.101.246	A	mail.vanitybath.com
66.180.101.250	A+PTR	mail.bmac-llp.com
66.180.101.250	PTR	66-180-101-250.customerip.birch.net
66.180.102.18	A+PTR	mail.stuartspnb.com
66.180.102.36	A+PTR	66-180-102-36.customerip.birch.net
66.180.102.36	A	atpccrm.com
66.180.102.43	A+PTR	thelma.camargocopeland.com
66.180.102.43	A+PTR	66-180-102-43.customerip.birch.net
66.180.102.62	A	charrosdetexas.info
66.180.102.62	A	charrosdetexas.com
66.180.102.62	A	charrosdedallas.org
66.180.102.66	PTR	serviceelectricsupply.com
66.180.102.66	A	66-180-102-66.customerip.birch.net
66.180.102.66	A	mail.serviceelectricsupply.com
66.180.102.68	PTR	66-180-102-68.customerip.birch.net
66.180.102.74	PTR	intdoc.com
66.180.102.74	PTR	intdoc.com.s5a1.psmtp.com
66.180.102.74	PTR	intdoc.com.s5a2.psmtp.com
66.180.102.91	PTR	lonestar.ghs.com
66.180.102.91	A+PTR	66-180-102-91.customerip.birch.net
66.180.102.110	A	oracle.ecomputertech.com
66.180.102.169	A	mail.genesiselectric.net
66.180.102.194	A+PTR	fw.version4.com
66.180.102.194	A+PTR	66-180-102-194.customerip.birch.net
66.180.102.195	A+PTR	cs1.version4.com
66.180.102.195	PTR	66-180-102-195.customerip.birch.net
66.180.102.196	A+PTR	mx1.version4.com
66.180.102.226	A+PTR	mail.lonestarcs.com
66.180.103.42	PTR	66-180-103-42.customerip.birch.net
66.180.103.42	A	jam.jingles.com
66.180.103.75	A	dondillon.com
66.180.103.76	A	mail.dondillon.com
66.180.103.106	PTR	chenille.com
66.180.103.106	A+PTR	66-180-103-106.customerip.birch.net
66.180.103.131	PTR	mailbox.cslic.com