Robtex

Up: 68.99.152.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 68.99.156.0/23
Down right: 68.99.158.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
68.99.156.11	A+PTR	mail.linisource.com
68.99.156.11	A	mmrestaurantequipment.com
68.99.156.11	A	linisource.com
68.99.156.23	A+PTR	wsip-68-99-156-23.ri.ri.cox.net
68.99.156.23	A	mail.mclaughlinassoc.com
68.99.156.39	A	mail.northerntitle.com
68.99.156.40	A+PTR	remote.capstonelimited.com
68.99.156.41	A	clt00sbs.capstonelimited.com
68.99.156.50	A	the-solutions-group.com
68.99.156.80	A	server2.contractsource.com
68.99.156.98	A	teamofdominance.com
68.99.156.98	A	mail.teamofdominance.com
68.99.156.142	A+PTR	wsip-68-99-156-142.ri.ri.cox.net
68.99.156.152	A	mail.forbeschocolate.com
68.99.156.153	A	mail.zincinsurance.com
68.99.156.153	A	mail.ohioinsure.com
68.99.156.170	A	smtp.quadstar.com
68.99.156.173	A+PTR	wsip-68-99-156-173.ri.ri.cox.net
68.99.156.180	A	mail.quadstar.com
68.99.156.239	A+PTR	wsip-68-99-156-239.ri.ri.cox.net
68.99.157.4	A	smtp.netservicesllc.net
68.99.157.4	A	mail.netservicesllc.net
68.99.157.15	PTR	wsip-68-99-157-15.ri.ri.cox.net
68.99.157.15	A	jimmahknows.net
68.99.157.15	A	thejimmahknows.net
68.99.157.73	A	mail.specifiedbuilding.com
68.99.157.109	PTR	xnetworking.net
68.99.157.109	A	mail.oh.shilohservice.com
68.99.157.139	PTR	antispam.sysguru.com
68.99.157.236	A	amesstores.com
68.99.157.239	PTR	wsip-68-99-157-239.ri.ri.cox.net
68.99.157.239	A	www.amesstores.com
68.99.157.243	A+PTR	wsip-68-99-157-243.ri.ri.cox.net
68.99.157.243	A	clients.bp-tech.com
68.99.157.243	A	steveshorerecoverytrust.com
68.99.157.244	A+PTR	mail.zavarellawoodworking.com
68.99.157.245	A	netdinteractive.com
68.99.158.26	A+PTR	wsip-68-99-158-26.ri.ri.cox.net
68.99.158.45	A+PTR	wsip-68-99-158-45.ri.ri.cox.net
68.99.158.47	PTR	wsip-68-99-158-47.ri.ri.cox.net
68.99.158.47	A	distributionsolutions.net
68.99.158.47	A	www.adaptiveminds.com
68.99.158.68	A+PTR	wsip-68-99-158-68.ri.ri.cox.net
68.99.158.73	A+PTR	zmail.ubcontrols.com
68.99.158.73	A	mx.ubcontrols.com
68.99.158.73	A	zmail.upc2.com
68.99.158.77	A+PTR	mail.lyons.com
68.99.158.77	A	mail.lyonstool.com
68.99.158.77	A	mail.medicaldevicesolutions.com
68.99.159.37	A	criticalmash.net
68.99.159.38	A+PTR	wsip-68-99-159-38.ri.ri.cox.net
68.99.159.60	A	web.rich-michael.net
68.99.159.61	PTR	www.richmichael.net
68.99.159.61	A	rich-michael.com
68.99.159.61	A	richmichael.net
68.99.159.66	A+PTR	wsip-68-99-159-66.ri.ri.cox.net
68.99.159.90	A	mail.state-wideelectric.com
68.99.159.99	A+PTR	wsip-68-99-159-99.ri.ri.cox.net
68.99.159.112	A	mail.mfd8th.org
68.99.159.113	A+PTR	email.hfhwfh.com
68.99.159.157	PTR	exchange.lisonline.net
68.99.159.172	A+PTR	wsip-68-99-159-172.ri.ri.cox.net
68.99.159.172	A	macsperts.org
68.99.159.204	A+PTR	wsip-68-99-159-204.ri.ri.cox.net