Robtex

Up: 204.138.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 204.138.52.0/23
Down right: 204.138.54.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
204.138.52.34	PTR	mailsvr.broadstreet.ca.52.138.204.in-addr.arpa
204.138.52.34	A	mailsvr.broadstreet.ca
204.138.52.35	A	mail.seymourpacific.ca
204.138.52.35	A	mail.acscivil.com
204.138.52.35	A	mail.redriverlumber.ca
204.138.52.66	A+PTR	exg.glbc.com
204.138.52.66	PTR	exgserver.glbc.com
204.138.52.66	PTR	mail.glbc.com
204.138.52.69	A	glbc.com
204.138.52.78	A	mypropertymanager.ca
204.138.52.138	A+PTR	webmail.jbermanglass.com
204.138.52.138	A	svanjbgexmb01.jbermanglass.com
204.138.52.138	A	webmail.bermanglass.com
204.138.52.146	A	mail.khdispatch.com
204.138.52.149	A	khdispatch.com
204.138.52.149	A	*.khdispatch.com
204.138.52.149	A	kh5.khdispatch.com
204.138.52.153	A	kh3.khdispatch.com
204.138.52.204	A	mail.ibigroup.bc.ca
204.138.52.227	PTR	mail.seymourpacific.ca
204.138.52.230	A	clientconnect.caro.ca
204.138.52.251	A	fs.caro.ca
204.138.54.0	PTR	network.8020solutions.teloip.net
204.138.54.2	PTR	wan1.8020solutions.teloip.net
204.138.54.9	PTR	ll-1.ana-vm-prod1.yyz.teloip.net
204.138.54.12	PTR	ll-4.ana-vm-prod1.yyz.teloip.net
204.138.54.14	PTR	unused-host.ana-vm-prod1.yyz.teloip.net
204.138.54.22	PTR	host.rbc-demo.mpoip.yyz.teloip.net
204.138.54.27	PTR	ll4.ana-vm10.yyz.teloip.net
204.138.54.43	PTR	host.kmp-designs.mpoip.yyz.teloip.net
204.138.54.46	PTR	host.kmp-designs.mpoip.yyz.teloip.net
204.138.54.46	A	srastudio.net
204.138.54.53	PTR	host.kmp-designs.mpoip.yyz.teloip.net
204.138.54.55	PTR	host.kmp-designs.mpoip.yyz.teloip.net
204.138.54.57	PTR	host.kmp-designs.mpoip.yyz.teloip.net
204.138.54.58	PTR	host.kmp-designs.mpoip.yyz.teloip.net
204.138.54.62	PTR	kmp5.kmpdesigns.com
204.138.54.63	PTR	broadcast.kmp-designs.mpoip.yyz.teloip.net
204.138.54.75	PTR	host.dsm-sigmacon.ana.yyz.teloip.net
204.138.54.80	PTR	network.pmp-exhaust.ana.yyz.teloip.net.54.138.204.in-addr.arpa
204.138.54.92	PTR	host.dsm-lab.ana.yyz.teloip.net
204.138.54.92	A	ns.csbe.net
204.138.54.92	A	ns3.csbe.net
204.138.54.98	PTR	host.bfn-litco.ana.yyz.teloip.net
204.138.54.102	PTR	host.bfn-litco.ana.yyz.teloip.net
204.138.54.112	PTR	network.fl-ibi-toronto.ana.yyz.teloip.net
204.138.54.115	PTR	host.fl-ibi-toronto.ana.yyz.teloip.net
204.138.54.115	A	mail.rapidaid.com
204.138.54.115	A	smtp.rapidaid.com
204.138.54.124	PTR	host.dsm-legalbeigel.ana.yyz.teloip.net
204.138.54.126	PTR	host.dsm-legalbeigel.ana.yyz.teloip.net
204.138.54.143	PTR	broadcast.fibernetics-fl.ana.yyz.teloip.net
204.138.54.145	PTR	cpe.bfn-smetrics.ana.yyz.teloip.net
204.138.54.163	PTR	host.fl-consaus.ana.yyz.teloip.net
204.138.54.176	PTR	network.bfn-dt-quebec.ana.yyz.teloip.net
204.138.54.178	PTR	host.bfn-dt-quebec.ana.yyz.teloip.net
204.138.54.189	PTR	host.bfn-dt-quebec.ana.yyz.teloip.net
204.138.54.202	PTR	host.catech.ana.yyz.teloip.net
204.138.54.203	PTR	host.catech.ana.yyz.teloip.net
204.138.54.206	PTR	host.catech.ana.yyz.teloip.net
204.138.54.210	A	mail.agtproductsinc.com
204.138.54.210	A	mail.barricadesubfloor.com
204.138.54.219	PTR	host.dricorefasterpipe.ana.yyz.teloip.net
204.138.54.230	A	chthon.dbsol.ca
204.138.54.233	PTR	ll06.cc05-06.yyz.teloip.net
204.138.54.233	A	ll02.cc05-06.yyz.teloip.net
204.138.54.236	PTR	network.timlee.ana.yyz.teloip.net
204.138.54.239	PTR	broadcast.timlee.ana.yyz.teloip.net
204.138.54.251	PTR	broadcast.wadet-turn.ana.yyz.teloip.net
204.138.55.210	PTR	host1.wadetech-dalhousie.yyz.teloip.net