Robtex

Up: 72.84.128.0/17
Can't show all results, try to descend to a more specific CIDR
Down left: 72.84.128.0/19
Down right: 72.84.160.0/19
(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
72.84.128.82	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
72.84.128.141	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
72.84.164.226	A	cantankero.us
72.84.179.34	A+PTR	pool-72-84-179-34.slsbmd.east.verizon.net
72.84.179.44	PTR	pool-72-84-179-44.slsbmd.east.verizon.net
72.84.180.210	A+PTR	pool-72-84-180-210.slsbmd.east.verizon.net
72.84.182.136	A+PTR	pool-72-84-182-136.slsbmd.east.verizon.net
72.84.182.136	A	boots673.com
72.84.184.224	A	pool-72-84-184-224.slsbmd.east.verizon.net
72.84.185.15	A+PTR	pool-72-84-185-15.slsbmd.east.verizon.net
72.84.185.179	PTR	pool-72-84-185-179.slsbmd.east.verizon.net
72.84.185.245	A+PTR	pool-72-84-185-245.slsbmd.east.verizon.net
72.84.186.126	A	pool-72-84-186-126.slsbmd.east.verizon.net
72.84.186.238	A+PTR	pool-72-84-186-238.slsbmd.east.verizon.net
72.84.187.41	PTR	pool-72-84-187-41.slsbmd.east.verizon.net
72.84.187.133	A	pool-72-84-187-133.slsbmd.east.verizon.net
72.84.187.219	A	pool-72-84-187-219.slsbmd.east.verizon.net
72.84.188.54	A+PTR	pool-72-84-188-54.slsbmd.east.verizon.net
72.84.190.2	A	mail.shcnskids.com
72.84.190.3	A+PTR	static-72-84-190-3.slsbmd.east.verizon.net
72.84.190.3	A	mail.georgecombs.com
72.84.190.3	A	mail.georgewcombs.com
72.84.190.7	PTR	static-72-84-190-7.slsbmd.east.verizon.net
72.84.190.194	A	static-72-84-190-194.slsbmd.east.verizon.net
72.84.191.58	A	mail.hogans.com
72.84.191.162	A	mail.baytechteam.com
72.84.191.194	A	mail.khcmd.net
72.84.191.228	A	mail01.md.dciwan.com