Maxmind just announced EOL of legacy geolite databases used by geoip module, no updates starting this April. See more at https://blog.maxmind.com/ 2018/01/02/discontinuation-of-the-geolite-legacy-databases/
If you use kamailio's geoip module, I suggest to switch to geoip2 module which uses Geolite2 databases and is a plug in replacement for geoip module.