Robtex

Up: 206.51.142.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 206.51.142.0/25
Down right: 206.51.142.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
206.51.142.2	A+PTR	206-51-142-2.nktelco.net
206.51.142.3	A+PTR	206-51-142-3.nktelco.net
206.51.142.8	A+PTR	206-51-142-8.nktelco.net
206.51.142.9	A+PTR	206-51-142-9.nktelco.net
206.51.142.10	A+PTR	206-51-142-10.nktelco.net
206.51.142.14	A+PTR	206-51-142-14.nktelco.net
206.51.142.18	A+PTR	206-51-142-18.nktelco.net
206.51.142.21	A+PTR	206-51-142-21.nktelco.net
206.51.142.21	A	mailserver.minsterbank.com
206.51.142.31	A+PTR	206-51-142-31.nktelco.net
206.51.142.33	A+PTR	206-51-142-33.nktelco.net
206.51.142.34	A	postoffice.ssghris.com
206.51.142.34	A	mail.itsespecially4u.com
206.51.142.35	A+PTR	206-51-142-35.nktelco.net
206.51.142.36	PTR	206-51-142-36.nktelco.net
206.51.142.36	A	mailsrv.ssghris.com
206.51.142.36	A	mail.streamlinersolutionsgroup.com
206.51.142.39	A+PTR	206-51-142-39.nktelco.net
206.51.142.43	A+PTR	206-51-142-43.nktelco.net
206.51.142.46	A+PTR	206-51-142-46.nktelco.net
206.51.142.49	A+PTR	206-51-142-49.nktelco.net
206.51.142.51	PTR	206-51-142.51.nktelco.net
206.51.142.51	A	mail.dickmansupply.com
206.51.142.52	PTR	206-51-142-52.nktelco.net
206.51.142.52	A	electro-controls.com
206.51.142.54	PTR	206-51-142-54.nktelco.net
206.51.142.54	A	electro-controls.com
206.51.142.54	A	electrogreenenergy.com
206.51.142.57	A+PTR	206-51-142-57.nktelco.net
206.51.142.58	A+PTR	206-51-142-58.nktelco.net
206.51.142.59	A+PTR	206-51-142-59.nktelco.net
206.51.142.61	A+PTR	206-51-142-61.nktelco.net
206.51.142.63	A+PTR	206-51-142-63.nktelco.net
206.51.142.68	A+PTR	206-51-142-68.nktelco.net
206.51.142.69	A+PTR	206-51-142-69.nktelco.net
206.51.142.74	A+PTR	206-51-142-74.nktelco.net
206.51.142.81	A+PTR	206-51-142-81.nktelco.net
206.51.142.82	A+PTR	206-51-142-82.nktelco.net
206.51.142.83	A+PTR	206-51-142-83.nktelco.net
206.51.142.85	A+PTR	206-51-142-85.nktelco.net
206.51.142.87	A+PTR	206-51-142-87.nktelco.net
206.51.142.89	A+PTR	206-51-142-89.nktelco.net
206.51.142.91	A+PTR	206-51-142-91.nktelco.net
206.51.142.98	A	zodiacmedia.net
206.51.142.99	A	cartman.l3tech.com
206.51.142.105	A+PTR	206-51-142-105.nktelco.net
206.51.142.106	A+PTR	206-51-142-106.nktelco.net
206.51.142.107	A+PTR	206-51-142-107.nktelco.net
206.51.142.117	A+PTR	206-51-142-117.nktelco.net
206.51.142.121	A+PTR	206-51-142-121.nktelco.net
206.51.142.126	A+PTR	206-51-142-126.nktelco.net
206.51.142.127	A+PTR	206-51-142-127.nktelco.net
206.51.142.129	A+PTR	206-51-142-129.nktelco.net
206.51.142.131	A+PTR	206-51-142-131.nktelco.net
206.51.142.132	A+PTR	206-51-142-132.nktelco.net
206.51.142.136	A+PTR	206-51-142-136.nktelco.net
206.51.142.138	A+PTR	206-51-142-138.nktelco.net
206.51.142.143	A+PTR	206-51-142-143.nktelco.net
206.51.142.147	A+PTR	206-51-142-147.nktelco.net
206.51.142.153	A+PTR	206-51-142-153.nktelco.net
206.51.142.160	A+PTR	206-51-142-160.nktelco.net
206.51.142.162	A+PTR	206-51-142-162.nktelco.net
206.51.142.166	A+PTR	206-51-142-166.nktelco.net
206.51.142.168	A+PTR	206-51-142-168.nktelco.net
206.51.142.169	A+PTR	206-51-142-169.nktelco.net
206.51.142.170	A+PTR	206-51-142-170.nktelco.net
206.51.142.172	A+PTR	206-51-142-172.nktelco.net
206.51.142.177	A+PTR	206-51-142-177.nktelco.net
206.51.142.179	A+PTR	206-51-142-179.nktelco.net
206.51.142.181	A+PTR	206-51-142-181.nktelco.net
206.51.142.182	A+PTR	206-51-142-182.nktelco.net
206.51.142.187	A	206-51-142-187.nktelco.net
206.51.142.190	A	206-51-142-190.nktelco.net
206.51.142.193	A+PTR	206-51-142-193.nktelco.net
206.51.142.195	A+PTR	206-51-142-195.nktelco.net
206.51.142.208	A+PTR	206-51-142-208.nktelco.net
206.51.142.209	A+PTR	206-51-142-209.nktelco.net
206.51.142.212	A+PTR	206-51-142-212.nktelco.net
206.51.142.219	A+PTR	206-51-142-219.nktelco.net
206.51.142.220	A+PTR	206-51-142-220.nktelco.net
206.51.142.223	A+PTR	206-51-142-223.nktelco.net
206.51.142.225	A+PTR	206-51-142-225.nktelco.net
206.51.142.230	A+PTR	206-51-142-230.nktelco.net
206.51.142.231	A+PTR	206-51-142-231.nktelco.net
206.51.142.232	A+PTR	206-51-142-232.nktelco.net
206.51.142.236	A+PTR	206-51-142-236.nktelco.net
206.51.142.238	A+PTR	206-51-142-238.nktelco.net
206.51.142.240	A+PTR	206-51-142-240.nktelco.net
206.51.142.245	A+PTR	206-51-142-245.nktelco.net
206.51.142.247	A+PTR	206-51-142-247.nktelco.net
206.51.142.249	A+PTR	206-51-142-249.nktelco.net
206.51.142.251	A+PTR	206-51-142-251.nktelco.net
206.51.142.252	A+PTR	206-51-142-252.nktelco.net
206.51.142.253	A+PTR	206-51-142-253.nktelco.net