Robtex

Up: 216.107.240.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 216.107.240.0/22
Down right: 216.107.244.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.107.240.106	PTR	216-107-240-106.plaync.com
216.107.241.113	PTR	216-107-241-113.ncsoft.com
216.107.242.195	PTR	216-107-242-195.plaync.com
216.107.243.51	PTR	216-107-243-51.ncsoft.com
216.107.243.146	PTR	216-107-243-146.ncsoft.com
216.107.243.153	PTR	216-107-243-153.plaync.com
216.107.243.153	A	ncdns03.ncsoft.com
216.107.243.162	PTR	216-107-243-162.ncsoft.com
216.107.243.162	A	ncwdns02.ncsoft.com
216.107.243.162	A	ncdns02.ncaustin.com
216.107.243.200	PTR	216-107-243-200.ncsoft.com
216.107.243.201	PTR	216-107-243-201.ncsoft.com
216.107.243.202	PTR	216-107-243-202.ncsoft.com
216.107.243.208	PTR	216-107-243-208.ncsoft.com
216.107.244.1	PTR	216.107.244-1.ncsoft.com
216.107.244.146	PTR	216.107.244-146.ncsoft.com
216.107.244.147	PTR	216.107.244-147.ncsoft.com
216.107.245.96	PTR	216-107-245-96.ncsoft.com
216.107.245.138	PTR	216-107-245-138.ncsoft.com
216.107.246.4	A+PTR	smtp1.guildwars.com
216.107.246.5	A	smtp2.guildwars.com
216.107.246.43	PTR	216-107-246-43.ncsoft.com
216.107.246.251	PTR	216-107-246-251.ncsoft.com
216.107.247.57	PTR	216-107-247-57.ncsoft.com