Robtex

Up: 170.226.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 170.226.0.0/23
Down right: 170.226.2.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
170.226.3.6	A+PTR	mss-tor-dns-02.mss.ca.ibm.com
170.226.3.9	A	mss-tor-file-02.mss.ca.ibm.com
170.226.3.249	PTR	ring2-in.antispam.nuvo.com
170.226.3.249	A	ring2-in.aeroplan.com
170.226.3.249	A	ring2-in.tdcteasyswitch.com