Robtex

Up: 208.6.232.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 208.6.234.0/24
Down right: 208.6.235.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
208.6.234.4	A+PTR	demeter-nas.centex.net
208.6.234.4	A+PTR	kratos-nas.centex.net
208.6.234.4	A+PTR	kratos.centex.net
208.6.234.5	PTR	mx-outbound.centex.net
208.6.234.8	A	webmail.centex.net
208.6.234.8	A	www.barnettranch.net
208.6.234.8	A	www.cttcinc.com
208.6.234.9	PTR	dns.centex.net
208.6.234.9	PTR	radius.centex.net
208.6.234.9	PTR	rbl.centex.net
208.6.234.10	PTR	ftp.centex.net
208.6.234.10	PTR	pop.centex.net
208.6.234.11	A+PTR	gldt-tndm-cache-02.centex.net
208.6.234.12	A+PTR	backup.centex.net
208.6.234.12	A+PTR	graphs.centex.net
208.6.234.12	A+PTR	manage1.centex.net
208.6.234.13	PTR	dnsadmin.centex.net
208.6.234.13	PTR	manage2.centex.net
208.6.234.13	PTR	ns4.centex.net
208.6.234.15	PTR	mail.centexnet.com
208.6.234.15	PTR	mail.cttcinc.com
208.6.234.15	PTR	admin.centex-edu.net
208.6.234.16	A	newlayout.centex.net
208.6.234.16	A	vhost02.centex.net
208.6.234.65	PTR	ctc-234-65.centex.net
208.6.234.65	A+PTR	ci.brownwood.tx.us
208.6.234.65	A+PTR	ftp.ci.brownwood.tx.us
208.6.235.132	PTR	grape132.wcc.net