Robtex

Up: 72.84.128.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 72.84.128.0/20
Down right: 72.84.144.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.84.128.5	A	salisbury.rommelco.com
72.84.128.5	A	mail.rommelco.com
72.84.128.15	A	mail.dmsandassociates.com
72.84.128.25	A	mail.tstgymnastics.com
72.84.128.56	A	mx1.labnet.sailsdigital.net
72.84.128.56	A	mx1.surfnook.com
72.84.128.82	A	mail.crisfieldcityhall.com
72.84.128.82	A	crisfieldcityhall.com
72.84.128.106	A	mail.corsicatech.com
72.84.128.120	A	arsotechnology.com
72.84.128.123	A	static-72-84-128-123.slsbmd.east.verizon.net
72.84.128.123	A	*.portraitday.com
72.84.128.141	A	smtp.atlanticptrehab.com
72.84.128.173	A	static-72-84-128-173.slsbmd.east.verizon.net
72.84.128.186	A	static-72-84-128-186.slsbmd.east.verizon.net
72.84.129.75	A	mcwilliamsgroup.com
72.84.131.207	PTR	pool-72-84-131-207.slsbmd.east.verizon.net
72.84.132.32	A	mailstore1.flexcosting.com
72.84.132.32	A	smtp.flexcosting.com
72.84.132.32	A	smtp.zephyrsystems.com
72.84.134.191	A	smtp.flexcost.com
72.84.134.203	A	pool-72-84-134-203.slsbmd.east.verizon.net
72.84.136.174	PTR	pool-72-84-136-174.slsbmd.east.verizon.net
72.84.136.174	A	mailstore1.dosafely.com
72.84.136.174	A	flexcosting.com
72.84.137.155	PTR	pool-72-84-137-155.slsbmd.east.verizon.net
72.84.140.40	A+PTR	pool-72-84-140-40.slsbmd.east.verizon.net
72.84.140.144	A+PTR	pool-72-84-140-144.slsbmd.east.verizon.net
72.84.141.59	A+PTR	pool-72-84-141-59.slsbmd.east.verizon.net
72.84.141.201	PTR	pool-72-84-141-201.slsbmd.east.verizon.net
72.84.143.30	A+PTR	pool-72-84-143-30.slsbmd.east.verizon.net
72.84.143.228	A+PTR	pool-72-84-143-228.slsbmd.east.verizon.net
72.84.152.104	A+PTR	pool-72-84-152-104.slsbmd.east.verizon.net
72.84.157.20	PTR	pool-72-84-157-20.slsbmd.east.verizon.net
72.84.157.100	A+PTR	pool-72-84-157-100.slsbmd.east.verizon.net