Robtex

Up: 192.12.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 192.12.0.0/23
Down right: 192.12.2.0/23

IP	Type	Hostname
192.12.0.26	A	www.syntax.com
192.12.0.52	A	mail1.tmgbuilders.ca
192.12.2.3	A	192.12.243-static.reverse.softlayer.com
192.12.2.12	A	www-a.seismicexchange.com
192.12.2.253	A	vpn-a.seismicexchange.com
192.12.2.253	A	vpn.seismicexchange.com