Robtex

Up: 66.132.4.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 66.132.4.0/24
Down right: 66.132.5.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.132.4.27	A	mail.excelairtool.net
66.132.4.29	PTR	mail.eucpi.com
66.132.4.34	PTR	mail.magnuminc.com
66.132.4.40	A	rickermarketingllc.com
66.132.4.42	A	mail.helppreventsuicide.org
66.132.4.46	PTR	mail.wadf.com
66.132.4.52	PTR	mail.femc.com
66.132.4.55	A	mail.resourcestrategies.com
66.132.4.142	A	mail.clevelandsenior.com
66.132.4.144	PTR	mail.walshmfg.com
66.132.4.154	A	medpartsplus.net
66.132.4.160	A	mail.mande.com
66.132.4.176	PTR	mail.metropools.com
66.132.4.223	A	mail.riverproperties.net
66.132.4.225	A	terminalopticallab.com
66.132.4.232	PTR	mail.reserve-group.com
66.132.4.234	PTR	mail.utss.net
66.132.4.246	A+PTR	mail.ussicefish.com
66.132.4.246	A	mail.thom.visn.net
66.132.5.5	PTR	mail.ashtabulacountybar.com
66.132.5.13	PTR	mail.medservplus.net
66.132.5.16	A	mail.mayerassociates.com
66.132.5.28	PTR	mail.signspdq.com
66.132.5.47	PTR	mail.wherryassoc.com
66.132.5.49	PTR	mail.holen1.net
66.132.5.49	A	holen1.net
66.132.5.59	PTR	mail.tabcominc.com
66.132.5.59	A	tabcominc.com
66.132.5.60	PTR	mail.eggplant.com
66.132.5.60	A	eggplant.com
66.132.5.60	A	www.eggplant.com
66.132.5.83	PTR	mail.ohiorailtourism.org
66.132.5.88	PTR	mail.buckeyeexpo.com
66.132.5.107	PTR	mail.pinnacle701.com
66.132.5.117	PTR	mail.miskulin.net
66.132.5.117	A	mail.lansinglawncare.com
66.132.5.117	A	mail.scottsmidmi.com
66.132.5.127	PTR	mail.newleafmedical.com
66.132.5.129	A	rosnerfamily.com
66.132.5.130	PTR	mail.clevelandmica.com
66.132.5.144	PTR	mail.m-bistro.com
66.132.5.157	PTR	mail.stumpfconstruction.com
66.132.5.177	A	koskidepaul.com
66.132.5.200	PTR	mail.goamericantruck.com
66.132.5.208	A	mail.greenindustrywebdesign.net
66.132.5.212	A	mail.cleveland-legal.com