in-addr.arpa registration

["Chad A. Adlawan" <chadi@i-mailbox.net>]

  i was wondering if someone can help/give me guidelines on what do i do
to register a block for reverse IP queries/reverse domain, my case is,
  a friend asked me why they can never do reverse lookups on their IP's
(they own the whole block, i.e. 208.162.24.*) and i found out that when I
do _$ nslookup -type=soa 24.162.208.in-addr.arpa.   i get 

***localhost can't find 24.162.208.in-addr.arpa.: Server failed

  when i tried  _$ nslookup -type=soa 162.208.in-addr.arpa.  ,  i get this 


162.208.in-addr.arpa
        origin = ns.cw.net
        mail addr = hostmaster.cw.net
        serial = 1999012001
        refresh = 3600 (1H)
        retry   = 600 (10M)
        expire  = 3600000 (5w6d16h)
        minimum ttl = 3600 (1H)

Authoritative answers can be found from:
162.208.in-addr.arpa    nameserver = ns.cw.net
162.208.in-addr.arpa    nameserver = ns2.cw.net
162.208.in-addr.arpa    nameserver = ns3.cw.net
ns.cw.net       internet address = 204.70.128.1
ns2.cw.net      internet address = 204.70.57.242
ns3.cw.net      internet address = 204.70.25.234  



the documentation that comes with bind says that reverse domain
registration is separate from forward domain registration, but forgot to
mention how to do it, the requirements, and whether there any fees for
this also?  hope someone can help
thanks
chad