Robtex

Up: 198.30.0.0/15
Can't show all results, try to descend to a more specific CIDR
Down left: 198.31.0.0/17
Down right: 198.31.128.0/17

IP	Type	Hostname
198.31.4.0	PTR	trendmls.com
198.31.4.2	A+PTR	dev.realtyrecords.com
198.31.4.2	A+PTR	taxdata.trendmls.com
198.31.4.2	A+PTR	dev.realtyrecords.trendmls.com
198.31.4.4	A	taxsql1.trendmls.com
198.31.9.3	A+PTR	mail.envoy.com
198.31.9.3	A+PTR	odo.envoy.com
198.31.9.5	A	www.envoynet.com
198.31.9.10	A	pc.envoy.com
198.31.12.129	A	b12-7600-outside-g3-5-int.net.nih.gov
198.31.12.131	A+PTR	k3ygg.nih.gov
198.31.12.132	A	qrm.nih.gov
198.31.12.137	A	b12-7600-outside-vlan6-int.net.nih.gov
198.31.14.220	A	ex.oesonline.com
198.31.14.220	A	mailhost.oesonline.com
198.31.21.2	PTR	10-2.dscga.com
198.31.24.150	PTR	amphitheaterybor.com
198.31.25.5	PTR	ns2.dzones.com
198.31.32.46	A	torrancepeds.us
198.31.32.46	A	mail.torrancepeds.us
198.31.32.227	A	www.docsilo.us
198.31.32.227	A	www.docsilo.com
198.31.33.43	A	silicafreight.com
198.31.33.58	PTR	mail.ealand.com
198.31.33.135	A	mail.ulead.com
198.31.33.136	A	ulgw1.ulead.com
198.31.40.17	PTR	sk.s2.ns1.ns92.kolmic.com
198.31.50.1	A	host-198-31-50-1.biznesshosting.net
198.31.50.2	A	mail.host6.my-ehost.com
198.31.50.2	A	www.bb44.com
198.31.50.2	A	mail.livelonger.ie
198.31.51.2	A	198-31-51-2.static.tbdsl.com
198.31.51.12	A	198-31-51-12.static.tbdsl.com
198.31.51.19	A	198-31-51-19.static.tbdsl.com
198.31.51.23	A	198-31-51-23.static.tbdsl.com
198.31.57.30	PTR	xwing.primedia.com
198.31.57.31	PTR	ywing.primedia.com
198.31.57.32	PTR	zwing.primedia.com
198.31.62.16	A	mta.member.aol.com
198.31.62.17	A	mta.email.lendingtree.com
198.31.62.22	A	mta.prom.ebay.com.cn
198.31.62.24	A	mta.email.webmd.com
198.31.63.19	A	mta.brandmail2.unileverservices.com
198.31.63.24	A	mta.mail.elsevierhealth.com
198.31.63.25	A	mta.email.hotfrog.nl
198.31.63.44	A	mta.mail002.xiu.com
198.31.63.47	A	mta.mail002.xiu.com
198.31.87.2	PTR	net1-02.abag.ca.gov
198.31.87.3	A+PTR	ns1.abag.ca.gov
198.31.87.3	A	iserver.abag.ca.gov
198.31.87.4	PTR	net1-04.abag.ca.gov
198.31.87.7	A	transportationfortomorrow.com
198.31.87.7	A	baytrail.com
198.31.87.60	A	baytrail.com
198.31.134.51	PTR	mail.finishmaster.com
198.31.134.88	PTR	pluto.matrix49.com
198.31.134.89	A	dnsmaster.yourbasement.com
198.31.134.166	A	mail.myindgop.org
198.31.146.98	A	andreavasquez.com
198.31.146.143	A	imail.ofinet.us
198.31.146.143	A	imail.ofinet.net
198.31.150.192	A	exchange.rcrp.com
198.31.151.12	A+PTR	www.grenlec.com
198.31.151.12	A	grenlec.com
198.31.151.201	A	nhnerd.com
198.31.151.201	A	talentonthepoint.com
198.31.162.254	A	fastpacket.com
198.31.162.254	A	mail.fastpacket.com
198.31.164.1	PTR	ns1.skyrapids.com
198.31.164.1	A	rylos2.skyrapids.com
198.31.164.2	PTR	ns2.skyrapids.com
198.31.164.3	A	ip-198-31-164-3.skyrapids.com
198.31.164.4	A	ip-198-31-164-4.skyrapids.com
198.31.164.5	A	ip-198-31-164-5.skyrapids.com
198.31.165.4	A	ip-198-31-165-4.oswi.net
198.31.166.25	A	ip-198-31-166-25.skyrapids.com
198.31.167.17	A	ip-198-31-167-17.skyrapids.com
198.31.167.34	A	ip-198-31-167-34.skyrapids.com
198.31.167.44	A	ip-198-31-167-44.skyrapids.com
198.31.167.45	A	ip-198-31-167-45.skyrapids.com
198.31.182.14	A	nyfixtest.fimat.com
198.31.182.45	A	sametime.fimat.com
198.31.182.45	A	stchg001.fimat.com
198.31.182.140	A	fimatfx.com
198.31.183.29	A	dr.fimacis.com
198.31.183.37	A	media.fimat.com
198.31.183.54	A	sim.fimatfx.com
198.31.183.244	A	ir-drc-smtp.fimat.com
198.31.184.103	A	ip-198-31-184-103.oswi.net
198.31.184.115	A	mail.buyallwireless.com
198.31.184.132	A	ip-198-31-184-132.oswi.net
198.31.184.165	A	ip-198-31-184-165.oswi.net
198.31.185.226	A	ip-198-31-185-226.oswi.net
198.31.185.227	A	ip-198-31-185-227.oswi.net
198.31.185.228	A	ip-198-31-185-228.oswi.net
198.31.185.229	A	www.hntrucking.com
198.31.186.4	A+PTR	ip-198-31-186-4.oswi.net
198.31.186.222	A	ip-198-31-186-222.oswi.net
198.31.189.4	PTR	mtpl.org
198.31.192.0	PTR	host.onoc.net
198.31.192.3	PTR	host.onoc.net
198.31.192.26	A	onoc-vpn-01.onoc.net
198.31.193.0	PTR	host.onoc.net
198.31.193.2	PTR	host.onoc.net
198.31.193.3	PTR	host.onoc.net
198.31.193.36	A	outbound.heacock.com
198.31.193.180	A	dns3.georgiasouthern.edu
198.31.193.211	A	resnet-nac.ucsd.edu
198.31.193.211	A	myweblogon.com
198.31.194.0	PTR	host.onoc.net
198.31.194.1	PTR	host.onoc.net
198.31.194.3	PTR	spam.harrells.com
198.31.194.11	A	growingabetterworld.com
198.31.194.20	A	jerue-mail.jerue.com
198.31.194.20	A	jeruels-mail.jeruels.com
198.31.194.50	A	tropicareservice.com
198.31.195.0	PTR	host.onoc.net
198.31.195.1	PTR	host.onoc.net
198.31.195.117	A	drspam1.hccfl.edu
198.31.196.0	PTR	host.onoc.net
198.31.196.2	PTR	host.onoc.net
198.31.196.3	PTR	host.onoc.net
198.31.196.57	A	arrmazim.com
198.31.196.82	A	911ea.net
198.31.196.183	A	mail.berkeleyprep.org
198.31.196.223	A	aircraftcomputing.com
198.31.197.53	A	www.sao10.com
198.31.197.54	A	govports.com
198.31.197.55	A	spamfirewall.sao10.com
198.31.197.98	A	dotnetmail.acny.com
198.31.207.250	PTR	mail.exelgroup.com
198.31.208.48	A+PTR	mail.lscsoft.com
198.31.208.69	A	gtm-pln.intuit.com
198.31.208.70	A	palmettomonitoring.com
198.31.208.105	A	redirect.intuit-fallback2.com
198.31.209.85	A	devlscsoft.com
198.31.209.134	A	pre-ptx-dns1.lscsoft.com
198.31.209.135	A	pre-ptx-dns2.lscsoft.com
198.31.209.200	A	prelscsoft.com
198.31.228.130	A	mail.freepoint.org
198.31.228.130	A	kobe.freepoint.org
198.31.228.133	A	ns.freepoint.org
198.31.240.3	A	gw1.airfone.net
198.31.240.4	A+PTR	gw2.airfone.net
198.31.240.17	A	host.airfone.net
198.31.247.130	A	vpn.airfone.net
198.31.248.3	A+PTR	ns1.tampabaydsl.com
198.31.248.5	A+PTR	ns2.tampabaydsl.com
198.31.248.6	A+PTR	ntp1.tbdsl.com
198.31.248.42	A	*.ohcnet.com
198.31.249.147	A	www.economistcorporatenetwork.com
198.31.249.147	A	economistcorporatenetwork.com
198.31.253.64	A	mail.furnitureempire.com