Robtex

Up: 83.146.20.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 83.146.21.0/25
Down right: 83.146.21.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
83.146.21.0	A+PTR	host-83-146-21-0.dslgb.com
83.146.21.5	A+PTR	cht-dns.dslgb.com
83.146.21.6	A+PTR	cht-dns.dslgb.com
83.146.21.7	PTR	smtp.bulldogdsl.com
83.146.21.7	PTR	smtp.dslgb.com
83.146.21.10	A+PTR	payg.bulldogdsl.com
83.146.21.11	A+PTR	speedtest.bulldogdsl.com
83.146.21.13	A	host-83-146-21-13.dslgb.com
83.146.21.14	A	host-83-146-21-14.dslgb.com
83.146.21.15	A	host-83-146-21-15.dslgb.com
83.146.21.19	A+PTR	host-83-146-21-19.dslgb.com
83.146.21.19	A+PTR	cht-bst-002.dslgb.net
83.146.21.19	A	cht-bst-002.bddsl.net
83.146.21.27	A+PTR	www.bulldogdsl.com
83.146.21.27	A	bulldogdsl.com
83.146.21.27	A	bddsl.com
83.146.21.29	A+PTR	mail.bulldogdsl.com
83.146.21.29	A+PTR	mail.cw-access.com
83.146.21.31	A+PTR	perseus.bulldogdsl.com
83.146.21.31	A+PTR	tftp1.dslgb.com
83.146.21.32	A	access.bulldogdsl.com
83.146.21.32	A	access.dslgb.com
83.146.21.34	A	host-83-146-21-34.dslgb.com
83.146.21.34	A	wsp.cw-access.com
83.146.21.50	A+PTR	host-83-146-21-50.dslgb.com
83.146.21.54	A	host-83-146-21-54.dslgb.com
83.146.21.55	A	host-83-146-21-55.dslgb.com
83.146.21.56	A	host-83-146-21-56.dslgb.com
83.146.21.57	A	host-83-146-21-57.dslgb.com
83.146.21.58	A	host-83-146-21-58.dslgb.com
83.146.21.59	A	host-83-146-21-59.dslgb.com
83.146.21.60	A	host-83-146-21-60.dslgb.com
83.146.21.61	A	host-83-146-21-61.dslgb.com
83.146.21.62	A	host-83-146-21-62.dslgb.com
83.146.21.63	A	host-83-146-21-63.dslgb.com
83.146.21.93	A	host-83-146-21-93.dslgb.com
83.146.21.94	A	host-83-146-21-94.dslgb.com
83.146.21.95	A	host-83-146-21-95.dslgb.com
83.146.21.96	A	host-83-146-21-96.dslgb.com
83.146.21.97	A	host-83-146-21-97.dslgb.com
83.146.21.98	A	host-83-146-21-98.dslgb.com
83.146.21.99	A+PTR	cwa-ans-1.dslgb.com
83.146.21.99	A	host-83-146-21-99.dslgb.com
83.146.21.99	A	ns2.dslgb.com
83.146.21.126	A	host-83-146-21-126.dslgb.com
83.146.21.127	A	host-83-146-21-127.dslgb.com
83.146.21.128	A	host-83-146-21-128.dslgb.com
83.146.21.129	A	host-83-146-21-129.dslgb.com
83.146.21.130	A	host-83-146-21-130.dslgb.com
83.146.21.131	A	host-83-146-21-131.dslgb.com
83.146.21.132	A	host-83-146-21-132.dslgb.com
83.146.21.133	A	host-83-146-21-133.dslgb.com
83.146.21.134	A	host-83-146-21-134.dslgb.com
83.146.21.135	A	host-83-146-21-135.dslgb.com
83.146.21.136	A	host-83-146-21-136.dslgb.com
83.146.21.137	A	host-83-146-21-137.dslgb.com
83.146.21.138	A	host-83-146-21-138.dslgb.com
83.146.21.139	A	host-83-146-21-139.dslgb.com
83.146.21.140	A	host-83-146-21-140.dslgb.com
83.146.21.141	A	host-83-146-21-141.dslgb.com
83.146.21.142	A	host-83-146-21-142.dslgb.com
83.146.21.143	A	host-83-146-21-143.dslgb.com
83.146.21.144	A	host-83-146-21-144.dslgb.com
83.146.21.145	A	host-83-146-21-145.dslgb.com
83.146.21.146	A	host-83-146-21-146.dslgb.com
83.146.21.147	A	host-83-146-21-147.dslgb.com
83.146.21.148	A	host-83-146-21-148.dslgb.com
83.146.21.149	A	host-83-146-21-149.dslgb.com
83.146.21.150	A	host-83-146-21-150.dslgb.com
83.146.21.151	A	host-83-146-21-151.dslgb.com
83.146.21.152	A	host-83-146-21-152.dslgb.com
83.146.21.162	A	host-83-146-21-162.dslgb.com
83.146.21.163	A	host-83-146-21-163.dslgb.com
83.146.21.164	A	host-83-146-21-164.dslgb.com
83.146.21.165	A	host-83-146-21-165.dslgb.com
83.146.21.166	A	host-83-146-21-166.dslgb.com
83.146.21.167	A	host-83-146-21-167.dslgb.com
83.146.21.168	A	host-83-146-21-168.dslgb.com
83.146.21.169	A	host-83-146-21-169.dslgb.com
83.146.21.170	A	host-83-146-21-170.dslgb.com
83.146.21.171	A	host-83-146-21-171.dslgb.com
83.146.21.203	A+PTR	jtac.dslgb.com
83.146.21.206	A	corpmail.bulldogdsl.com
83.146.21.206	A	corpmail.cw-access.com
83.146.21.208	A	wadsit1.cw-access.com
83.146.21.212	A	host-83-146-21-212.dslgb.com
83.146.21.212	A	wadstub.cw-access.com
83.146.21.219	A	min.cw-access.com
83.146.21.220	A	host-83-146-21-220.dslgb.com
83.146.21.220	A	secmin.cw-access.com
83.146.21.221	A+PTR	host-83-146-21-221.dslgb.com
83.146.21.221	A+PTR	ops.dslgb.com
83.146.21.222	A	host-83-146-21-222.dslgb.com
83.146.21.223	A	host-83-146-21-223.dslgb.com
83.146.21.224	A	host-83-146-21-224.dslgb.com
83.146.21.225	A	host-83-146-21-225.dslgb.com
83.146.21.226	A	host-83-146-21-226.dslgb.com
83.146.21.227	A	host-83-146-21-227.dslgb.com
83.146.21.228	A	host-83-146-21-228.dslgb.com
83.146.21.229	A	host-83-146-21-229.dslgb.com
83.146.21.253	A+PTR	rls.bddsl.net