Robtex

Up: 66.180.112.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 66.180.112.0/22
Down right: 66.180.116.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.180.112.4	A+PTR	mail.eralp.net
66.180.112.4	A+PTR	66-180-112-4.customerip.birch.net
66.180.112.4	A	mail.medconbenefit.com
66.180.112.129	PTR	mail.txspecialties.com
66.180.112.129	PTR	mail.dal.cbeyond.com
66.180.112.129	A+PTR	66-180-112-129.customerip.birch.net
66.180.112.166	A+PTR	remote.dallasinstitute.org
66.180.113.7	A	mail.oakcliffofficesupply.com
66.180.113.130	A	mail.thermadata.com
66.180.113.171	A	mail.intexelectric.com
66.180.113.171	A	mail.intexplumbing.com
66.180.113.203	A	icefineeyewear.net
66.180.113.203	A	mail.friscofamilyeyecare.com
66.180.113.245	A	remote.cgm-us.com
66.180.115.4	A	yousufint.com
66.180.115.22	A	mail.smartdrywall.com
66.180.115.188	A	gmservicesinc.com
66.180.116.6	A	www.cedarhillimaging.net
66.180.116.6	A	cedarhillimaging.net
66.180.116.35	PTR	mail.fbsinc.com
66.180.116.35	A+PTR	66-180-116-35.customerip.birch.net
66.180.116.49	PTR	mail.greenfam.org
66.180.116.49	A+PTR	66-180-116-49.customerip.birch.net
66.180.116.58	A	mail.robertsandcrow.com
66.180.116.58	A	robertsandcrow.com
66.180.116.66	PTR	w2kemail.lemkepc.com
66.180.116.66	A+PTR	66-180-116-66.customerip.birch.net
66.180.116.105	A	ftp.glassnajiffy.com
66.180.116.138	A	mail.ovillafire.org
66.180.116.139	A+PTR	mail.cityofovilla.org
66.180.116.154	A	remote.xocorp.com
66.180.116.158	A	ybmail.youngbloodltd.com
66.180.116.187	PTR	mail.tamlinsoftware.com
66.180.116.187	PTR	mail2.tamlinsoftware.com
66.180.116.187	PTR	66-180-116-187.customerip.birch.net
66.180.116.204	A+PTR	66-180-116-204.customerip.birch.net
66.180.116.212	A	newsletter.metrobrick.com
66.180.116.214	PTR	warrenjkatzmd.com
66.180.116.214	PTR	remote.warrenjkatzmd.com
66.180.116.214	A+PTR	66-180-116-214.customerip.birch.net
66.180.116.242	A+PTR	66-180-116-242.customerip.birch.net
66.180.116.242	A	haastexas.com
66.180.116.242	A	www.haastexas.com
66.180.116.244	PTR	bigbowl.tatorsalad.info
66.180.116.244	A	mail.tatorsalad.info
66.180.117.34	A+PTR	mail.unifiedgroup.com
66.180.117.34	PTR	66-180-117-34.customerip.birch.net
66.180.117.34	A	mail.dfwspecialty.com
66.180.117.58	PTR	mail.tartansales.com
66.180.117.58	A+PTR	mail.achungmd.com
66.180.117.58	A+PTR	achungmd.com
66.180.117.82	A+PTR	dallas.schmidtlaw.com
66.180.117.82	A	mail.uptowncapital-dallas.com
66.180.117.82	A	mail.nationwideroyalties.com
66.180.117.90	A	mail.cgcdfw.com
66.180.117.90	A	cgcdfw.com
66.180.117.146	PTR	mail.thepalmerfirm.com
66.180.117.146	A	mail.palmerfirm.com
66.180.117.146	A	thepalmerfirm.com
66.180.117.170	A	mail.daedeluscorp.com
66.180.117.170	A	mail.thewarefirm.com
66.180.117.234	A	csi-server.csicalendering.com
66.180.117.234	A	mail.csicalendering.com
66.180.117.235	A	vpn.theldmgroup.com
66.180.118.11	A+PTR	66-180-118-11.customerip.birch.net
66.180.118.11	A	remote.communitylifeline.org
66.180.118.11	A	mail.communitylifeline.org
66.180.118.26	A	exchange.completeofficesolutionstx.com
66.180.118.34	A+PTR	mail.svcc.biz
66.180.118.90	PTR	mail.interstructure.net
66.180.118.138	PTR	mail.hightechservices.com
66.180.118.138	PTR	66-180-118-138.customerip.birch.net
66.180.118.140	A	hartje-consulting.com
66.180.118.158	A	mail.henryandjones.com
66.180.118.162	PTR	66-180-118-162.customerip.birch.net
66.180.118.162	A	vpn.stripingplus.com
66.180.118.202	PTR	mail.wmcobb.com
66.180.118.225	A	mail.superiorlandscapes.biz
66.180.118.245	A	makitsupply.com
66.180.119.34	A	mail.ebertlawoffices.com
66.180.119.50	PTR	mail.cdconstruct.com
66.180.119.50	PTR	66-180-119-50.customerip.birch.net
66.180.119.50	A	microboxchassis.com
66.180.119.66	A	patches.bsscpalaw.com
66.180.119.78	A	sandrahager.com
66.180.119.98	A	test.milhorn.org
66.180.119.98	A	mail.mdgbts.com
66.180.119.124	A+PTR	66-180-119-124.customerip.birch.net
66.180.119.124	A+PTR	ftp.idview.com
66.180.119.126	A	smtp.dvslivedemo.com
66.180.119.170	PTR	barracuda.andyupdike.com
66.180.119.171	A	e.annemcgilvray.com
66.180.119.206	A+PTR	aladc.ala-inc.net
66.180.119.206	A	mx1.mypcdoc.net
66.180.119.228	PTR	alncbeyond.aptdata.net
66.180.119.228	PTR	66-180-119-228.customerip.birch.net
66.180.119.228	A	ns2.pseudoconsulting.com