Robtex

Up: 69.51.144.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 69.51.152.0/22
Down right: 69.51.156.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
69.51.152.6	PTR	mail.interactmich.org
69.51.152.16	A+PTR	69-51-152-16-wmu-student.jasnetworks.net
69.51.152.56	PTR	rootsnowplows.com
69.51.152.99	A+PTR	mail.baileyexcavating.com
69.51.152.114	PTR	protocomm.biz
69.51.152.137	A	stancati-assoc.com
69.51.152.150	A	ns1.hagenlad.com
69.51.153.5	PTR	themotorzone.com
69.51.153.27	A	mail.centralcityparking.net
69.51.153.27	A	mail.centralcityparking.org
69.51.153.69	A	mail.kzoomc.org
69.51.153.89	PTR	performance-validation
69.51.153.249	A	69-51-153-249-ptr.jasnetworks.net
69.51.154.4	A	lamrodrigues.com
69.51.154.4	A	godofcomputers.com
69.51.154.4	A	superhumansystems.com
69.51.154.12	A	e-monte.com
69.51.154.235	A	mail.dcadvocate.com
69.51.155.15	PTR	gwia.bkccpa.com
69.51.155.32	A	2hauto-diesel.com
69.51.155.117	A	evertsfamily.com
69.51.155.138	PTR	mail.automation-design.com
69.51.155.181	PTR	mail.explainers.com
69.51.156.4	PTR	decisioncatalyst.com
69.51.156.4	PTR	mail.decisioncatalyst.com
69.51.156.202	A+PTR	mail.distinctive-machine.com
69.51.156.242	A	office.lwr.com
69.51.156.244	A+PTR	mail.lwr.com
69.51.156.245	A	remote.lwr.com
69.51.157.226	A	mars.mfbhosp.org
69.51.157.229	A+PTR	mail.maryfreebed.com
69.51.158.106	A	mail.grct.org
69.51.159.4	PTR	swit2.gdrpmibl.jasnetworks.net
69.51.159.4	A	mail.jaznetworks.com
69.51.159.4	A	mail.jasnetwork.net
69.51.159.5	A	maps.jasnetworks.net
69.51.159.8	PTR	secure2.jasnetworks.net
69.51.159.13	PTR	2intensestudios.com
69.51.159.13	PTR	aimasphalt.com
69.51.159.13	PTR	aimtechltd.com
69.51.159.21	A+PTR	oldns1.jasnetworks.net
69.51.159.22	A	oldns2.jasnetworks.net
69.51.159.23	A+PTR	mrclean.jasnetworks.net
69.51.159.23	A	mrclean.iserv.net
69.51.159.134	A+PTR	mail.krispak.com
69.51.159.142	A	mail.paramount-plastics.com