The GeoLite databases are distributed under the
Creative Commons Attribution-ShareAlike 3.0 Unported License
http://creativecommons.org/licenses/by-sa/3.0/ .
The attribution requirement may be met by including the following in
all advertising and documentation mentioning features of or use of this database:

"This product includes GeoLite data created by MaxMind, available from
http://www.maxmind.com/"