Latest version v1.1.1 https://pecl.php.net/package-changelog.php?package=geoip&release=1.1.1 support IPv6 four country database. New functions geoip_country_code_by_name_v6(), geoip_country_code3_by_name_v6() and geoip_country_name_by_name_v6() are not mentioned in doc at all.