Robtex

Up: 69.51.152.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 69.51.156.0/23
Down right: 69.51.158.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
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
69.51.159.7	PTR	mail.2intensestudios.com
69.51.159.7	PTR	mail.agbfleet.com
69.51.159.7	PTR	mail.aimasphalt.com
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