Robtex

Up: 192.81.8.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 192.81.12.0/23
Down right: 192.81.14.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.81.12.1	PTR	gateway1.know.iteract.net
192.81.12.2	PTR	192-81-12-2.cpe.internexe.net
192.81.12.2	A	dns1.iteract.net
192.81.12.4	PTR	192-81-12-4.cpe.internexe.net
192.81.12.5	PTR	ns2.iteract.net
192.81.12.9	PTR	mailgate.iteract.net
192.81.12.9	A	mx1.vivomail.ca
192.81.12.9	A	mx1.theduck.ca
192.81.12.10	PTR	mail.iteract.net
192.81.12.12	PTR	192-81-12-12.cpe.internexe.net
192.81.12.12	A	flexiglace.ca
192.81.12.12	A	web1.iteract.net
192.81.12.18	A+PTR	web2.iteract.net
192.81.12.18	A	fgedwards.ca
192.81.12.18	A	occupationdouche.tv
192.81.12.19	PTR	mc2.voxframe.net
192.81.12.20	PTR	mc1.voxframe.net
192.81.12.21	PTR	calea.iteract.net
192.81.12.134	PTR	192-81-12-134.cpe.iteract.net
192.81.12.134	A	daniellabbe.ca
192.81.12.134	A	flexiglace.net
192.81.12.135	PTR	192-81-12-135.cpe.internexe.net
192.81.12.135	A	occupationdouche.tv
192.81.12.135	A	hcoderre.com
192.81.12.141	PTR	192-81-12-141.cpe.iteract.net
192.81.12.141	A	sawyersears.com
192.81.12.141	A	mail.craftyplayers.com
192.81.12.148	PTR	web3.internexe.net
192.81.12.148	A	www.vivomail.ca
192.81.12.148	A	mail.vivomail.ca
192.81.12.150	PTR	mailgate.iteract.net
192.81.12.154	PTR	server1.voxframe.net
192.81.12.154	A	maplerest.com
192.81.12.154	A	1stknowlton.com
192.81.13.31	PTR	192-81-13-31.cpe.iteract.net
192.81.14.214	PTR	192-81-14-214.cpe.internexe.net
192.81.15.10	PTR	mail3.iteract.net
192.81.15.10	A	mx2.voxframe.com
192.81.15.10	A	mx2.maplerest.com
192.81.15.255	PTR	192-81-15-255.cpe.iteract.net