Robtex

Up: 209.183.20.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 209.183.20.0/25
Down right: 209.183.20.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
209.183.20.2	PTR	host-209-183-20-2.static.primus.ca
209.183.20.201	PTR	host-209-183-20-201.static.primus.ca
209.183.20.201	A	ns2.cta-systemsource.ca
209.183.20.201	A	ns2.cta-systemsource.com
209.183.20.203	A+PTR	smtp.univeris.com
209.183.20.203	A	smtp.mpsweb.ca
209.183.20.203	A	smtp.univeris.ca
209.183.20.208	PTR	host-209-183-20-208.static.primus.ca
209.183.20.208	A	mpsweb.ca