Robtex

Up: 72.18.32.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 72.18.40.0/22
Down right: 72.18.44.0/22

IP	Type	Hostname
72.18.41.131	A+PTR	72x18x41x131.static.pinnacletelecom.com
72.18.41.149	A	72x18x41x149.static.pinnacletelecom.com
72.18.41.165	A	aokprinting.net
72.18.43.214	A	mail.scoufoslaw.com
72.18.45.226	PTR	mail.itpartnergroup.com
72.18.45.232	A	mail.sequoyahmemorial.com
72.18.47.195	PTR	72d18d47d195.static.diamondnetok.com
72.18.47.195	A	shadow.viptsg.com