Robtex

Up: 72.198.136.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 72.198.140.0/23
Down right: 72.198.142.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.198.140.26	A	siltekinc.com
72.198.140.27	PTR	wsip-72-198-140-27.dc.dc.cox.net
72.198.140.27	A	eribarpartners.com
72.198.140.27	A	mhiportal.com
72.198.140.28	A	mail.siltekinc.com
72.198.140.34	A	mail.ziadurrani.com
72.198.140.34	A	mail.infotechmgmt.com
72.198.140.98	PTR	wsip-72-198-140-98.dc.dc.cox.net
72.198.140.107	A	mail.mosshomeservices.com
72.198.140.107	A	mail.marbledoctorva.com
72.198.140.107	A	mail.mossbuildinganddesign.com
72.198.140.164	A	mail.adtekengineers.com
72.198.140.186	A+PTR	backupmx.toward.com
72.198.141.3	A	zimbra1.ices-us.net
72.198.141.21	PTR	wsip-72-198-141-21.dc.dc.cox.net
72.198.141.21	A	cyberresearchgroup.net
72.198.141.101	A	mx.vesi1.com
72.198.141.101	A	mx.e-9corporation.com
72.198.141.104	PTR	wsip-72-198-141-104.dc.dc.cox.net
72.198.141.161	A	spam.rarnold.com
72.198.141.162	PTR	wsip-72-198-141-162.dc.dc.cox.net
72.198.141.163	PTR	wsip-72-198-141-163.dc.dc.cox.net
72.198.141.163	A	mail.rarnold.com
72.198.141.164	A	rarnold.com
72.198.141.190	PTR	wsip-72-198-141-190.dc.dc.cox.net
72.198.141.209	PTR	wsip-72-198-141-209.dc.dc.cox.net
72.198.141.209	A	jacketwave.com
72.198.141.230	PTR	wsip-72-198-141-230.dc.dc.cox.net
72.198.141.245	A	girlkieu.info
72.198.141.245	A	eiic.com
72.198.141.246	PTR	wsip-72-198-141-246.dc.dc.cox.net
72.198.141.246	A	mail.girlkieu.us
72.198.141.246	A	www.eiic.com
72.198.141.247	PTR	wsip-72-198-141-247.dc.dc.cox.net
72.198.142.24	PTR	wsip-72-198-142-24.dc.dc.cox.net
72.198.142.28	PTR	wsip-72-198-142-28.dc.dc.cox.net
72.198.142.166	A	hiaquickquotes.com
72.198.142.232	PTR	wsip-72-198-142-232.dc.dc.cox.net
72.198.142.232	A	mail.csi-va.org
72.198.143.3	PTR	wsip-72-198-143-3.dc.dc.cox.net
72.198.143.4	PTR	wsip-72-198-143-4.dc.dc.cox.net
72.198.143.6	PTR	mta0015a22bbc5a.mm.oc.oc.cox.net
72.198.143.6	A	ravenwing.com
72.198.143.8	PTR	wsip-72-198-143-8.dc.dc.cox.net
72.198.143.9	PTR	wsip-72-198-143-9.dc.dc.cox.net
72.198.143.10	PTR	wsip-72-198-143-10.dc.dc.cox.net
72.198.143.15	PTR	wsip-72-198-143-15.dc.dc.cox.net
72.198.143.17	PTR	wsip-72-198-143-17.dc.dc.cox.net
72.198.143.19	PTR	wsip-72-198-143-19.dc.dc.cox.net
72.198.143.20	PTR	wsip-72-198-143-20.dc.dc.cox.net
72.198.143.25	PTR	wsip-72-198-143-25.dc.dc.cox.net
72.198.143.26	PTR	wsip-72-198-143-26.dc.dc.cox.net
72.198.143.32	PTR	wsip-72-198-143-32.dc.dc.cox.net
72.198.143.33	PTR	wsip-72-198-143-33.dc.dc.cox.net
72.198.143.38	A	itpro.solutions
72.198.143.38	A	mail.itpro.solutions
72.198.143.38	A	mail.eduquese.com
72.198.143.46	PTR	wsip-72-198-143-46.dc.dc.cox.net
72.198.143.48	PTR	wsip-72-198-143-48.dc.dc.cox.net
72.198.143.61	PTR	wsip-72-198-143-61.dc.dc.cox.net
72.198.143.63	PTR	wsip-72-198-143-63.dc.dc.cox.net
72.198.143.69	PTR	wsip-72-198-143-69.dc.dc.cox.net
72.198.143.71	PTR	wsip-72-198-143-71.dc.dc.cox.net
72.198.143.73	PTR	wsip-72-198-143-73.dc.dc.cox.net
72.198.143.83	PTR	wsip-72-198-143-83.dc.dc.cox.net
72.198.143.90	PTR	wsip-72-198-143-90.dc.dc.cox.net
72.198.143.91	PTR	wsip-72-198-143-91.dc.dc.cox.net
72.198.143.92	PTR	wsip-72-198-143-92.dc.dc.cox.net
72.198.143.93	PTR	wsip-72-198-143-93.dc.dc.cox.net
72.198.143.96	PTR	wsip-72-198-143-96.dc.dc.cox.net
72.198.143.100	PTR	wsip-72-198-143-100.dc.dc.cox.net
72.198.143.101	PTR	wsip-72-198-143-101.dc.dc.cox.net
72.198.143.102	PTR	wsip-72-198-143-102.dc.dc.cox.net
72.198.143.112	PTR	wsip-72-198-143-112.dc.dc.cox.net
72.198.143.118	PTR	wsip-72-198-143-118.dc.dc.cox.net
72.198.143.123	PTR	wsip-72-198-143-123.dc.dc.cox.net
72.198.143.125	PTR	wsip-72-198-143-125.dc.dc.cox.net
72.198.143.126	PTR	wsip-72-198-143-126.dc.dc.cox.net
72.198.143.127	PTR	wsip-72-198-143-127.dc.dc.cox.net
72.198.143.129	PTR	wsip-72-198-143-129.dc.dc.cox.net
72.198.143.130	PTR	wsip-72-198-143-130.dc.dc.cox.net
72.198.143.135	A	tcscomputer.com
72.198.143.138	PTR	wsip-72-198-143-138.dc.dc.cox.net
72.198.143.140	PTR	wsip-72-198-143-140.dc.dc.cox.net
72.198.143.141	PTR	wsip-72-198-143-141.dc.dc.cox.net
72.198.143.141	A	givinghoperadio.com
72.198.143.142	A	mail.askcongress.com
72.198.143.142	A	askcongress.com
72.198.143.143	PTR	wsip-72-198-143-143.dc.dc.cox.net
72.198.143.153	PTR	wsip-72-198-143-153.dc.dc.cox.net
72.198.143.160	PTR	wsip-72-198-143-160.dc.dc.cox.net
72.198.143.168	PTR	wsip-72-198-143-168.dc.dc.cox.net
72.198.143.171	PTR	wsip-72-198-143-171.dc.dc.cox.net
72.198.143.179	PTR	wsip-72-198-143-179.dc.dc.cox.net
72.198.143.182	PTR	wsip-72-198-143-182.dc.dc.cox.net
72.198.143.183	PTR	wsip-72-198-143-183.dc.dc.cox.net
72.198.143.184	PTR	wsip-72-198-143-184.dc.dc.cox.net
72.198.143.191	PTR	wsip-72-198-143-191.dc.dc.cox.net
72.198.143.195	PTR	wsip-72-198-143-195.dc.dc.cox.net
72.198.143.199	PTR	wsip-72-198-143-199.dc.dc.cox.net
72.198.143.205	PTR	wsip-72-198-143-205.dc.dc.cox.net
72.198.143.206	PTR	wsip-72-198-143-206.dc.dc.cox.net
72.198.143.210	PTR	wsip-72-198-143-210.dc.dc.cox.net
72.198.143.213	PTR	wsip-72-198-143-213.dc.dc.cox.net
72.198.143.220	PTR	wsip-72-198-143-220.dc.dc.cox.net
72.198.143.225	PTR	wsip-72-198-143-225.dc.dc.cox.net
72.198.143.228	PTR	wsip-72-198-143-228.dc.dc.cox.net
72.198.143.229	PTR	wsip-72-198-143-229.dc.dc.cox.net
72.198.143.231	PTR	wsip-72-198-143-231.dc.dc.cox.net
72.198.143.235	PTR	wsip-72-198-143-235.dc.dc.cox.net
72.198.143.236	PTR	wsip-72-198-143-236.dc.dc.cox.net
72.198.143.237	PTR	wsip-72-198-143-237.dc.dc.cox.net
72.198.143.238	PTR	wsip-72-198-143-238.dc.dc.cox.net
72.198.143.240	PTR	wsip-72-198-143-240.dc.dc.cox.net
72.198.143.241	PTR	wsip-72-198-143-241.dc.dc.cox.net
72.198.143.244	PTR	wsip-72-198-143-244.dc.dc.cox.net
72.198.143.253	PTR	wsip-72-198-143-253.dc.dc.cox.net
72.198.143.254	PTR	wsip-72-198-143-254.dc.dc.cox.net