Robtex

Up: 66.196.240.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 66.196.240.0/23
Down right: 66.196.242.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.196.240.82	PTR	sselaw.com
66.196.240.85	A	remote.sseklaw.com
66.196.240.122	A	remote.melastorusa.com
66.196.240.122	A	mx1.pvfluid.com
66.196.240.123	PTR	mail.pvfluid.com
66.196.240.125	A	mail.pvfluid.com
66.196.240.132	A	exchange.fisherboyd.com
66.196.240.186	A	spamkiller.fisherboyd.com
66.196.241.3	PTR	mailserver2.hcss.com
66.196.241.3	A	mail.cpwamerica.com
66.196.241.35	A+PTR	mail.vancoenergy.com
66.196.241.35	PTR	mail.vandykeenergy.com
66.196.241.42	A	mail.interiortechnologies.com
66.196.241.43	A	intranet.interiortechnologies.com
66.196.241.50	A+PTR	mail2.wapitienergy.com
66.196.241.53	PTR	owa2.wapitienergy.com
66.196.241.54	A+PTR	remote2.wapitienergy.com
66.196.241.74	A+PTR	mail.picins.com
66.196.241.162	A	mail.willingham-law.com
66.196.241.195	A	spf.fkmagency.com
66.196.241.195	A	smtp.fkmagency.com
66.196.241.198	A	myild.com
66.196.241.210	A	nextgmobile.com
66.196.241.212	A	wprepaid.net
66.196.241.213	PTR	mail.nextg.com
66.196.241.213	A	mail.mynextg.com
66.196.241.213	A	mail.wprepaid.com
66.196.241.242	A	mail.jdapsi.com
66.196.241.243	A+PTR	mx.jdapsi.com
66.196.241.246	A	www.jdapsi.com
66.196.242.22	A	www.aquifercms.com
66.196.242.34	PTR	mail.millergrossbard.com
66.196.242.57	A	mail.schaeffertexas.com
66.196.242.66	PTR	mail-server.demar-engr.com
66.196.242.69	PTR	d69.demar-engr.com
66.196.242.77	PTR	d77.demar-engr.com
66.196.242.78	PTR	d78.demar-engr.com
66.196.242.88	PTR	d88.demar-engr.com
66.196.242.90	PTR	d90.demar-engr.com
66.196.242.100	PTR	d100.demar-engr.com
66.196.242.102	PTR	d102.demar-engr.com
66.196.242.107	PTR	d107.demar-engr.com
66.196.242.110	PTR	d110.demar-engr.com
66.196.242.110	A	pelicanww.us
66.196.242.124	PTR	d124.demar-engr.com
66.196.242.126	PTR	d126.demar-engr.com
66.196.242.146	A	mail1.rutherfordoil.com
66.196.242.146	A	rutherfordoil.com
66.196.242.156	A	mx1.flfw.com
66.196.243.50	PTR	res.logixcom.net
66.196.243.74	PTR	mail.houstonhand.com
66.196.243.161	A	fw.brfamilylaw.com
66.196.243.211	A	zhenlixiangmu.com
66.196.243.211	A	indeco-tx.com
66.196.243.211	A	cri-explosionproofbreakers.com
66.196.243.212	A+PTR	mx2.indeco-tx.com
66.196.243.213	PTR	zimbra.indeco-tx.com