Robtex

Up: 204.11.72.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 204.11.76.0/23
Down right: 204.11.78.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
204.11.76.11	A+PTR	mx2.ctc.biz
204.11.76.12	A+PTR	ns2.ctc.biz
204.11.76.12	A	ns2.champaigntelephone.com
204.11.76.40	A+PTR	www-s.osterco.com
204.11.76.41	A+PTR	204-11-76-41.ip.ctc.biz
204.11.76.54	A+PTR	www.osterco.com
204.11.76.54	A	cjoster.com
204.11.76.56	A+PTR	n2-ast-ipmi.ctc.biz
204.11.76.61	A+PTR	204-11-76-61.ip.ctc.biz
204.11.76.250	PTR	204-11-76-250.ip.ctc.biz
204.11.77.3	A+PTR	mail.singletonlawfirm.com
204.11.77.3	A	mail.slfmail.com
204.11.77.86	A+PTR	204-11-77-86.ip.ctc.biz
204.11.77.86	A	stratanetwork.com
204.11.77.86	A	www.stratanetwork.com
204.11.77.88	PTR	aspmail.stratanetwork.com.77.11.204.in-addr.arpa
204.11.77.88	A	aspmail01.stratanetwork.com
204.11.77.88	A	aspmail.stratanetwork.com
204.11.77.131	A+PTR	204-11-77-131.ip.ctc.biz
204.11.77.135	A	204-11-77-135.ip.ctc.biz
204.11.77.152	PTR	204-11-77-152.ip.ctc.biz
204.11.77.190	A	mosmail03.com
204.11.78.28	A	mail.escaconsultants.com
204.11.78.93	A+PTR	204-11-78-93.ip.ctc.biz
204.11.78.93	A	mail.metritech.com
204.11.78.179	A+PTR	mail2.downeygroup.com
204.11.78.202	PTR	204-11-78-202.ip.ctc.biz
204.11.78.202	A	mail.cardthartic.com
204.11.79.0	PTR	204-11-79-0.ip.ctc.biz
204.11.79.7	A+PTR	204-11-79-7.ip.ctc.biz
204.11.79.68	A+PTR	204-11-79-68.ip.ctc.biz
204.11.79.68	A	mx1.ldevgroup.com
204.11.79.68	A	mx1.yachtrockit.com
204.11.79.69	PTR	exchange.jimmyjohns.com
204.11.79.69	A	mx1.ldevgroup.com
204.11.79.69	A	mx1.yachtrockit.com
204.11.79.73	PTR	204-11-79-73.ip.ctc.biz
204.11.79.73	A	termsrv.jimmyjohns.net
204.11.79.74	PTR	204-11-79-74.ip.ctc.biz
204.11.79.74	A	dmz.jimmyjohns.net
204.11.79.75	PTR	204-11-79-75.ip.ctc.biz
204.11.79.75	A	mx1p1.jimmyjohns.com
204.11.79.75	A	mx1p1.jimmyjohns.net
204.11.79.76	PTR	204-11-79-76.ip.ctc.biz
204.11.79.76	A	mx2p2.jimmyjohns.com
204.11.79.76	A	mx2p2.jimmyjohns.net
204.11.79.111	A+PTR	204-11-79-111.ip.ctc.biz
204.11.79.112	A+PTR	204-11-79-112.ip.ctc.biz
204.11.79.147	A	webmail.obires.com
204.11.79.186	A+PTR	204-11-79-186.ip.ctc.biz