Robtex

Up: 206.51.128.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 206.51.128.0/25
Down right: 206.51.128.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
206.51.128.1	A	206-51-128-1.nktelco.net
206.51.128.3	A+PTR	206-51-128-3.nktelco.net
206.51.128.4	A+PTR	206-51-128-4.nktelco.net
206.51.128.6	PTR	smtp5459.redcondor.net
206.51.128.6	A	nktelcowireless.com.mx2.nktelco.rcimx.net
206.51.128.6	A	bmx.cbmintl.com.redcondor.net
206.51.128.7	PTR	206-51-128-7.nktelco.net
206.51.128.16	A	206-51-128-16.nktelco.net
206.51.128.20	A	206-51-128-20.nktelco.net
206.51.128.25	A	206-51-128-25.nktelco.net
206.51.128.26	A+PTR	206-51-128-26.nktelco.net
206.51.128.31	A+PTR	206-51-128-31.nktelco.net
206.51.128.32	A	206-51-128-32.nktelco.net
206.51.128.34	A	206-51-128-34.nktelco.net
206.51.128.36	A	206-51-128-36.nktelco.net
206.51.128.38	A+PTR	206-51-128-38.nktelco.net
206.51.128.39	A+PTR	206-51-128-39.nktelco.net
206.51.128.40	A	206-51-128-40.nktelco.net
206.51.128.41	A	206-51-128-41.nktelco.net
206.51.128.42	A+PTR	206-51-128-42.nktelco.net
206.51.128.44	A	206-51-128-44.nktelco.net
206.51.128.45	A+PTR	206-51-128-45.nktelco.net
206.51.128.49	A+PTR	206-51-128-49.nktelco.net
206.51.128.53	A+PTR	206-51-128-53.nktelco.net
206.51.128.55	A+PTR	ns1.nktelco.net
206.51.128.57	A+PTR	206-51-128-57.nktelco.net
206.51.128.58	PTR	206-51-128-58.nktelco.net
206.51.128.60	A	206-51-128-60.nktelco.net
206.51.128.62	A	206-51-128-62.nktelco.net
206.51.128.65	A	206-51-128-65.nktelco.net
206.51.128.67	A	206-51-128-67.nktelco.net
206.51.128.77	A+PTR	206-51-128-77.nktelco.net
206.51.128.78	A	206-51-128-78.nktelco.net
206.51.128.84	A	206-51-128-84.nktelco.net
206.51.128.91	A	206-51-128-91.nktelco.net
206.51.128.100	A	voiceproxy.nktelco.net
206.51.128.102	A+PTR	206-51-128-102.nktelco.net
206.51.128.104	A+PTR	206-51-128-104.nktelco.net
206.51.128.105	A	206-51-128-105.nktelco.net
206.51.128.110	A+PTR	206-51-128-110.nktelco.net
206.51.128.121	A+PTR	206-51-128-121.nktelco.net
206.51.128.122	A+PTR	206-51-128-122.nktelco.net
206.51.128.126	A+PTR	206-51-128-126.nktelco.net
206.51.128.135	A	206-51-128-135.nktelco.net
206.51.128.136	A	206-51-128-136.nktelco.net
206.51.128.137	A	206-51-128-137.nktelco.net
206.51.128.138	A	206-51-128-138.nktelco.net
206.51.128.140	A+PTR	206-51-128-140.nktelco.net
206.51.128.141	A	206-51-128-141.nktelco.net
206.51.128.143	A	206-51-128-143.nktelco.net
206.51.128.146	A	206-51-128-146.nktelco.net
206.51.128.147	A	206-51-128-147.nktelco.net
206.51.128.148	A	206-51-128-148.nktelco.net
206.51.128.149	A+PTR	206-51-128-149.nktelco.net
206.51.128.150	A	206-51-128-150.nktelco.net
206.51.128.151	A+PTR	206-51-128-151.nktelco.net
206.51.128.155	A	206-51-128-155.nktelco.net
206.51.128.156	A+PTR	206-51-128-156.nktelco.net
206.51.128.157	A+PTR	206-51-128-157.nktelco.net
206.51.128.159	A	206-51-128-159.nktelco.net
206.51.128.160	A+PTR	206-51-128-160.nktelco.net
206.51.128.165	A	206-51-128-165.nktelco.net
206.51.128.166	A	206-51-128-166.nktelco.net
206.51.128.167	A	206-51-128-167.nktelco.net
206.51.128.168	PTR	206-51-128-168.nktelco.net
206.51.128.170	A	206-51-128-170.nktelco.net
206.51.128.175	A	206-51-128-175.nktelco.net
206.51.128.176	A	206-51-128-176.nktelco.net
206.51.128.178	A	206-51-128-178.nktelco.net
206.51.128.180	A	206-51-128-180.nktelco.net
206.51.128.183	A	206-51-128-183.nktelco.net
206.51.128.184	A	206-51-128-184.nktelco.net
206.51.128.185	A+PTR	206-51-128-185.nktelco.net
206.51.128.187	A	206-51-128-187.nktelco.net
206.51.128.188	A	206-51-128-188.nktelco.net
206.51.128.189	A+PTR	206-51-128-189.nktelco.net
206.51.128.192	A+PTR	206-51-128-192.nktelco.net
206.51.128.193	A+PTR	206-51-128-193.nktelco.net
206.51.128.194	A+PTR	206-51-128-194.nktelco.net
206.51.128.195	A	206-51-128-195.nktelco.net
206.51.128.197	A	206-51-128-197.nktelco.net
206.51.128.200	A	206-51-128-200.nktelco.net
206.51.128.201	A	206-51-128-201.nktelco.net
206.51.128.202	A	206-51-128-202.nktelco.net
206.51.128.205	A	206-51-128-205.nktelco.net
206.51.128.207	A	206-51-128-207.nktelco.net
206.51.128.208	A	206-51-128-208.nktelco.net
206.51.128.212	A+PTR	206-51-128-212.nktelco.net
206.51.128.217	A	206-51-128-217.nktelco.net
206.51.128.220	A+PTR	206-51-128-220.nktelco.net
206.51.128.223	A	206-51-128-223.nktelco.net
206.51.128.225	A+PTR	206-51-128-225.nktelco.net
206.51.128.227	A+PTR	206-51-128-227.nktelco.net
206.51.128.228	A	206-51-128-228.nktelco.net
206.51.128.229	A+PTR	206-51-128-229.nktelco.net
206.51.128.233	A	206-51-128-233.nktelco.net
206.51.128.237	A	206-51-128-237.nktelco.net
206.51.128.239	A	206-51-128-239.nktelco.net
206.51.128.241	A	206-51-128-241.nktelco.net
206.51.128.242	A	206-51-128-242.nktelco.net
206.51.128.243	A+PTR	206-51-128-243.nktelco.net
206.51.128.245	A	206-51-128-245.nktelco.net
206.51.128.248	A	206-51-128-248.nktelco.net
206.51.128.249	A+PTR	206-51-128-249.nktelco.net
206.51.128.250	A	206-51-128-250.nktelco.net
206.51.128.251	A	206-51-128-251.nktelco.net
206.51.128.252	A	206-51-128-252.nktelco.net
206.51.128.253	A	206-51-128-253.nktelco.net