Robtex

Up: 206.127.158.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 206.127.158.0/25
Down right: 206.127.158.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
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