Robtex

Up: 205.193.72.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 205.193.72.0/25
Down right: 205.193.72.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
205.193.72.2	A	pslrbbcp.pslrb-crtfp.gc.ca
205.193.72.47	A+PTR	mailbcp.pslrb-crtfp.gc.ca
205.193.72.47	PTR	mailbcp.pslreb-crtefp.gc.ca
205.193.72.49	A+PTR	ns1.pslreb-crtefp.gc.ca
205.193.72.49	A	ns1.pslrb-crtfp.gc.ca
205.193.72.49	A	ns1.tribunal.gc.ca