Robtex

Up: 206.127.128.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 206.127.144.0/21
Down right: 206.127.152.0/21
(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
206.127.144.130	PTR	206-127-144-130.ncsoft.com
206.127.144.130	A	lbdns03.gtm.ncsoft.com
206.127.145.71	A	ncdemail01.plaync.com
206.127.145.71	A	ncdemail.plaync.com
206.127.145.71	A	ncdemail01.ncaustin.com
206.127.145.178	PTR	ncwedge03.eu.ncsoft.com
206.127.146.3	PTR	206-127-146-3.ncsoft.com
206.127.146.32	PTR	206-127-146-32.ncsoft.com
206.127.146.48	PTR	206-127-146-48.ncsoft.com
206.127.146.73	A	auth2.101.arenanetworks.com
206.127.146.74	A	auth2.101.arenanetworks.com
206.127.146.83	PTR	206-127-146-83.ncsoft.com
206.127.146.99	PTR	206-127-146-99.ncsoft.com
206.127.146.112	PTR	206-127-146-112.ncsoft.com
206.127.146.131	PTR	206-127-146-131.ncsoft.com
206.127.146.144	PTR	206-127-146-144.ncsoft.com
206.127.146.147	PTR	206-127-146-147.ncsoft.com
206.127.146.192	PTR	206-127-146-192.ncsoft.com
206.127.146.224	PTR	206-127-146-224.ncsoft.com
206.127.146.227	PTR	206-127-146-227.ncsoft.com
206.127.147.13	A	entdecktguildwars.com
206.127.147.13	A	decouvrezguildwars.com
206.127.147.13	A	odkryjguildwars.com
206.127.148.2	PTR	206-127-148-2.ncsoft.com
206.127.148.16	PTR	206-127-148-16.ncsoft.com
206.127.148.17	PTR	206-127-148-17.ncsoft.com
206.127.148.33	PTR	206-127-148-33.ncsoft.com
206.127.148.35	PTR	206-127-148-35.ncsoft.com
206.127.148.49	PTR	206-127-148-49.ncsoft.com
206.127.148.50	PTR	206-127-148-50.ncsoft.com
206.127.148.66	PTR	206-127-148-66.ncsoft.com
206.127.148.97	PTR	206-127-148-97.ncsoft.com
206.127.148.98	PTR	206-127-148-98.ncsoft.com
206.127.148.115	PTR	206-127-148-115.ncsoft.com
206.127.148.131	PTR	206-127-148-131.ncsoft.com
206.127.148.132	A	icmp.eu.ncwest.com
206.127.148.146	PTR	ncwdns05.ncsoft.com
206.127.148.147	PTR	206-127-148-147.ncsoft.com
206.127.148.153	A	ncdns05.ncsoft.com
206.127.148.177	PTR	206-127-148-177.ncsoft.com
206.127.148.179	PTR	206-127-148-179.ncsoft.com
206.127.148.208	PTR	206-127-148-208.ncsoft.com
206.127.148.210	PTR	206-127-148-210.ncsoft.com
206.127.148.225	PTR	206-127-148-225.ncsoft.com
206.127.148.242	PTR	206-127-148-242.ncsoft.com
206.127.149.3	PTR	206-127-149-3.ncsoft.com
206.127.149.8	PTR	206-127-149-8.ncsoft.com
206.127.149.24	PTR	206-127-149-24.ncsoft.com
206.127.151.80	A+PTR	media.lineage2.com
206.127.152.1	PTR	206-127-152-1.ncsoft.com
206.127.152.65	PTR	206-127-152-65.ncsoft.com
206.127.153.150	A	china-arenanetworks.com
206.127.153.151	A	guildwarsutopia.com
206.127.153.151	A	guildwar.net
206.127.153.151	A	guildwarsnightfall.net
206.127.153.160	PTR	206-127-153-160.ncsoft.com
206.127.153.160	A	plaync.us
206.127.153.160	A	www.plaync.us
206.127.153.162	PTR	206-127-153-162.plaync.com
206.127.153.178	PTR	206-127-153-178.ncsoft.com
206.127.153.178	A	arenanetworks.com
206.127.153.183	A	www.guildwars2wiki.com
206.127.153.183	A	guildwars2wiki.com
206.127.153.206	A	www.rgtr.com
206.127.153.206	A	rgtr.com
206.127.153.227	PTR	206-127-153-227.ncsoft.com
206.127.154.1	PTR	206-127-154-1.ncsoft.com
206.127.154.10	A	eu-bns.ncsoft.com
206.127.154.10	A	eu-bns.gtm.ncsoft.com
206.127.154.11	A	eu-bnsmarket.ncsoft.com
206.127.154.11	A	eu-bnsmarket.gtm.ncsoft.com
206.127.154.12	PTR	206-127-154-12.ncsoft.com
206.127.154.130	PTR	206-127-154-130.ncsoft.com
206.127.155.2	PTR	206-127-155-2.ncsoft.com
206.127.155.34	PTR	206-127-155-34.ncsoft.com
206.127.155.115	PTR	206-127-155-115.plaync.com
206.127.155.162	PTR	206-127-155-162.ncsoft.com
206.127.155.162	A	ncdns01.ncsoft.com
206.127.155.162	A	ncwdns01.ncsoft.com
206.127.155.163	PTR	206-127-155-163.ncsoft.com
206.127.155.194	PTR	206-127-155-194.ncsoft.com
206.127.155.194	A	ncftp07.plaync.com
206.127.155.195	A	ncftp09.plaync.com
206.127.155.196	A	ncftp11.plaync.com
206.127.155.208	PTR	206-127-155-208.ncsoft.com
206.127.155.210	PTR	206-127-155-210.ncsoft.com
206.127.155.227	A	ncftp01.plaync.com
206.127.155.235	A	ncftp02.plaync.com
206.127.157.113	PTR	206-127-157-113.ncsoft.com
206.127.157.114	PTR	206-127-157-114.ncsoft.com
206.127.157.226	PTR	206-127-157-226.ncsoft.com
206.127.157.227	PTR	206-127-157-227.ncsoft.com
206.127.158.1	PTR	206-127-158-1.ncsoft.com
206.127.158.31	A	file2.arenanetworks.com
206.127.158.31	A	file10.arenanetworks.com
206.127.158.31	A	file11.arenanetworks.com
206.127.158.32	A	file8.arenanetworks.com
206.127.158.32	A	file3.arenanetworks.com
206.127.158.33	PTR	206-127-158-33.ncsoft.com
206.127.158.33	A	file3.arenanetworks.com
206.127.158.33	A	file9.arenanetworks.com
206.127.158.34	PTR	206-127-158-34.plaync.com
206.127.158.34	A	file3.arenanetworks.com
206.127.158.34	A	file9.arenanetworks.com
206.127.159.77	A	auth2.101.arenanetworks.com
206.127.159.107	A	auth2.101.arenanetworks.com
206.127.159.109	A	auth2.101.arenanetworks.com
206.127.159.115	PTR	206-127-159-115.ncsoft.com