mmdb-go Enriching MMDB files with your own data using Go How to use? build go build mmdb-go example curl -L https://raw.githubusercontent.com/carrnot/china-ip-list/release/ip.txt -o ip.txt ./mmdb-go -i ip.txt custom name ./mmdb-go -i ip.txt -o custom.mmdb Credits https://blog.maxmind.com/2020/09/enriching-mmdb-files-with-your-own-data-using-go/