Several years back I was programming a network utility that needs an index relating IP network numbers to network names and identities, for class A, B and C networks, I found this list compiled from the Internet.
I know that you can always use whois, or some online website to achieve the same thing. MaxMind even has a collection of GeoIP APIs that can be used. There are even companies provided IP to city/region/country mapping database. However the list here is more details as it provides the identities as well.
The list is extracted from the whois database at the Internic. As of December 22, 1997, control of IP network allocation has passed to Arin (American Register of Internet Networks). There are similar organisations for European (www.ripe.net) and Asian-Pacific (www.apnic.net) networks.
As an example, see below
220.127.116.11 - 18.104.22.168 AT&T ITS (NET-ATT)
22.214.171.124 - 126.96.36.199 GWV International (NETBLK-GWVTRAVEL-320 )
188.8.131.52 - 184.108.40.206 National Equipment Services Inc (NETBLK-NATLEQUIP-32-128)
220.127.116.11 - 18.104.22.168 Kidde Fenwal (NETBLK-KF-330)
22.214.171.124 - 126.96.36.199 Solectron Corporation (NETBLK-SC-340)
188.8.131.52 - 184.108.40.206 Clean Harbors Environental Services Inc. (NETBLK-CLEANHARBORS-35-0)
220.127.116.11 - 18.104.22.168 Clean Harbors Environental Services Inc. (NETBLK-CLEANHARBORS-36-0)
22.214.171.124 - 126.96.36.199 U A M Investment Services Inc. (NETBLK-UAM-36128)
188.8.131.52 - 184.108.40.206 cybex (NETBLK-CYBEX-36-192)
220.127.116.11 - 18.104.22.168 Hill Holiday Connors (NETBLK-HILL-36-224)
22.214.171.124 - 126.96.36.199 Delta F Corporation (NETBLK-DELTAFC-36-240)
188.8.131.52 - 184.108.40.206 General Eastern Instruments (NETBLK-GEI-37-0 )
220.127.116.11 - 18.104.22.168 Bostik Inc (NETBLK-BI-37128)
22.214.171.124 - 126.96.36.199 WorldWide Direct (NETBLK-WWDIRECT-380)
188.8.131.52 - 184.108.40.206 Advance Reproduction (NETBLK-ADVANCEREPRO-390)
220.127.116.11 - 18.104.22.168 Technology Sales Inc. (NETBLK-TSI-39128)
22.214.171.124 - 126.96.36.199 Wolverine Corporation (NETBLK-WOLVERINE-39192)
188.8.131.52 - 184.108.40.206 Uromed Corporation (NETBLK-UC-39-224)
220.127.116.11 - 18.104.22.168 Hurwitz group, inc. (NETBLK-HURWITZ-40-0 )
22.214.171.124 - 126.96.36.199 Moldflow (NETBLK-MOLDFLOW-40128)
188.8.131.52 - 184.108.40.206 Clean Harbors Environental Services Inc. (NETBLK-CHESI-41-0)
220.127.116.11 - 18.104.22.168 Trans National Travel (NETBLK-TRANSNATIONAL-42-0)
22.214.171.124 - 126.96.36.199 Focus Enhancements (NETBLK-FOCUS-430)
188.8.131.52 - 184.108.40.206 The Berkshire Group (NETBLK-TBG-44-0)
220.127.116.11 - 18.104.22.168 mega Transportation Group (NETBLK-MEGATRANS-44-128)
22.214.171.124 - 126.96.36.199 Van Leer Metallized (NETBLK-VANLEER-44-192)
The list is not been updated for awhile but it should be still very useful.