Robtex

Up: 216.25.64.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 216.25.68.0/23
Down right: 216.25.70.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.25.68.5	A	mail.carpetcleaningnj.com
216.25.68.5	A	mail.carpetnj.com
216.25.68.38	PTR	mail.mostlysofas.com
216.25.68.59	PTR	mail.imaginis.net
216.25.68.82	PTR	mail.faysalbank.com
216.25.68.123	PTR	mail.victoryseeds.com
216.25.69.40	PTR	mail.afloridavacation.com
216.25.69.55	A	mail.medicaledu.com
216.25.69.89	PTR	mail.toolandsupply.com
216.25.69.91	PTR	mail.presentationpro.com
216.25.69.123	PTR	mail.victoryseeds.com
216.25.69.152	A	mail.royalsound.net
216.25.69.152	A	mail.royalbavarians.com
216.25.69.156	PTR	mail.consultis.cl
216.25.69.156	PTR	mail.consultis.net
216.25.69.160	PTR	mail.sounddynamics.com
216.25.69.240	PTR	mail.maplab.com
216.25.69.242	PTR	mail.mhnonline.com
216.25.70.28	A+PTR	mail.manima.com
216.25.70.93	PTR	mail.razzbere.com
216.25.70.100	A	mail.xerplivepro.com
216.25.70.132	PTR	mail.aspenridge.org
216.25.70.137	PTR	mail.dangerfish.com
216.25.70.137	PTR	mail.dirtypunk.com
216.25.70.137	PTR	mail.gamehole.com
216.25.70.162	A+PTR	scoutsft.com
216.25.70.183	PTR	mail.benebase.com
216.25.70.184	PTR	mail.pottery-world.com
216.25.70.184	A	mail.xml-world.com
216.25.70.184	A	mail.db-world.com
216.25.70.194	A	printersservice.net
216.25.70.195	A	www.michaeltodd.co.uk
216.25.70.195	A	michaeltoddtrueorganicsint.com
216.25.70.195	A	michaeltodd.co.uk
216.25.70.202	A	dermwrite.com
216.25.70.203	A	dermwriteapp.com
216.25.70.204	A	dermwriteonline.com
216.25.70.246	A	*.htmlhtmlwww.firstinmath.com
216.25.70.246	A	*.htmwww.firstinmath.com
216.25.70.246	A	com.htmlhtmlwww.firstinmath.com
216.25.71.93	PTR	mail.familynude.com
216.25.71.231	A	mail.princetonaudubon.com