There are two licenses, one for the C library software, and one for
the database.

SOFTWARE LICENSE (C library)

The GeoIP C Library is licensed under the LGPL.  For details see
the COPYING file.

OPEN DATA LICENSE (GeoLite Country and GeoLite City databases)

Copyright (c) 2007 MaxMind LLC.  All Rights Reserved.

All advertising materials and documentation mentioning features or use of
this database must display the following acknowledgment:
"This product includes GeoLite data created by MaxMind, available from
http://maxmind.com/"

Redistribution and use with or without modification, are permitted provided
that the following conditions are met:
1. Redistributions must retain the above copyright notice, this list of
conditions and the following disclaimer in the documentation and/or other
materials provided with the distribution. 
2. All advertising materials and documentation mentioning features or use of
this database must display the following acknowledgement:
"This product includes GeoLite data created by MaxMind, available from
http://maxmind.com/"
3. "MaxMind" may not be used to endorse or promote products derived from this
database without specific prior written permission.

THIS DATABASE IS PROVIDED BY MAXMIND.COM ``AS IS'' AND ANY 
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
DISCLAIMED. IN NO EVENT SHALL MAXMIND.COM BE LIABLE FOR ANY 
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
DATABASE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.