Robtex

Up: 206.127.144.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 206.127.144.0/23
Down right: 206.127.146.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
206.127.144.81	PTR	206-127-144-81.plaync.com
206.127.144.81	A	diag.plaync.com
206.127.144.85	PTR	206-127-144-85.ncsoft.com
206.127.144.130	PTR	206-127-144-130.ncsoft.com
206.127.144.130	A	lbdns03.gtm.ncsoft.com
206.127.145.53	PTR	206-127-145-53.ncsoft.com
206.127.145.71	A+PTR	ncdemail01.ncsoft.com
206.127.145.71	A	ncdemail01.plaync.com
206.127.145.71	A	ncdemail.plaync.com
206.127.145.75	A	ncdesftp01.plaync.com
206.127.145.178	PTR	ncwedge03.eu.ncsoft.com
206.127.146.3	PTR	206-127-146-3.ncsoft.com
206.127.146.5	PTR	206-127-146-5.ncsoft.com
206.127.146.6	PTR	206-127-146-6.ncsoft.com
206.127.146.14	PTR	206-127-146-14.ncsoft.com
206.127.146.23	PTR	206-127-146-23.ncsoft.com
206.127.146.24	PTR	206-127-146-24.ncsoft.com
206.127.146.25	PTR	206-127-146-25.ncsoft.com
206.127.146.27	PTR	206-127-146-27.ncsoft.com
206.127.146.32	PTR	206-127-146-32.ncsoft.com
206.127.146.36	PTR	206-127-146-36.ncsoft.com
206.127.146.39	PTR	206-127-146-39.ncsoft.com
206.127.146.41	PTR	206-127-146-41.ncsoft.com
206.127.146.42	PTR	206-127-146-42.ncsoft.com
206.127.146.47	PTR	206-127-146-47.ncsoft.com
206.127.146.48	PTR	206-127-146-48.ncsoft.com
206.127.146.52	PTR	206-127-146-52.plaync.com
206.127.146.54	PTR	206-127-146-54.ncsoft.com
206.127.146.55	PTR	206-127-146-55.ncsoft.com
206.127.146.63	PTR	206-127-146-63.ncsoft.com
206.127.146.73	PTR	206-127-146-73.ncsoft.com
206.127.146.73	A	auth2.101.arenanetworks.com
206.127.146.74	PTR	206-127-146-74.plaync.com
206.127.146.74	A	auth2.101.arenanetworks.com
206.127.146.76	PTR	206-127-146-76.ncsoft.com
206.127.146.83	PTR	206-127-146-83.ncsoft.com
206.127.146.87	PTR	206-127-146-87.ncsoft.com
206.127.146.89	PTR	206-127-146-89.ncsoft.com
206.127.146.92	PTR	206-127-146-92.ncsoft.com
206.127.146.93	PTR	206-127-146-93.ncsoft.com
206.127.146.99	PTR	206-127-146-99.ncsoft.com
206.127.146.100	PTR	206-127-146-100.ncsoft.com
206.127.146.103	PTR	206-127-146-103.ncsoft.com
206.127.146.105	PTR	206-127-146-105.ncsoft.com
206.127.146.110	PTR	206-127-146-110.ncsoft.com
206.127.146.111	PTR	206-127-146-111.ncsoft.com
206.127.146.112	PTR	206-127-146-112.ncsoft.com
206.127.146.119	PTR	206-127-146-119.ncsoft.com
206.127.146.131	PTR	206-127-146-131.ncsoft.com
206.127.146.134	PTR	206-127-146-134.ncsoft.com
206.127.146.138	PTR	206-127-146-138.ncsoft.com
206.127.146.143	PTR	206-127-146-143.ncsoft.com
206.127.146.144	PTR	206-127-146-144.ncsoft.com
206.127.146.147	PTR	206-127-146-147.ncsoft.com
206.127.146.148	PTR	206-127-146-148.ncsoft.com
206.127.146.155	PTR	206-127-146-155.ncsoft.com
206.127.146.165	PTR	206-127-146-165.ncsoft.com
206.127.146.184	PTR	206-127-146-184.ncsoft.com
206.127.146.186	PTR	206-127-146-186.ncsoft.com
206.127.146.192	PTR	206-127-146-192.ncsoft.com
206.127.146.199	PTR	206-127-146-199.ncsoft.com
206.127.146.200	PTR	206-127-146-200.ncsoft.com
206.127.146.202	PTR	206-127-146-202.ncsoft.com
206.127.146.205	PTR	206-127-146-205.ncsoft.com
206.127.146.220	PTR	206-127-146-220.ncsoft.com
206.127.146.224	PTR	206-127-146-224.ncsoft.com
206.127.146.227	PTR	206-127-146-227.ncsoft.com
206.127.146.228	PTR	206-127-146-228.ncsoft.com
206.127.146.229	PTR	206-127-146-229.ncsoft.com
206.127.146.230	PTR	206-127-146-230.ncsoft.com
206.127.146.235	PTR	206-127-146-235.ncsoft.com
206.127.146.237	PTR	206-127-146-237.ncsoft.com
206.127.146.247	PTR	206-127-146-247.ncsoft.com
206.127.146.248	PTR	206-127-146-248.ncsoft.com
206.127.147.13	PTR	206-127-147-13.ncsoft.com
206.127.147.13	A	entdecktguildwars.com
206.127.147.13	A	decouvrezguildwars.com