ZAnnotate ZAnnotate is a Go utility that facilitates annotating large datasets with network metadata. Right now this includes: Maxmind GeoIP2 AS/Routing Data (based on an MRT routing table) For example, you can add Maxmind geolocation data to a list of IPs: cat ips.csv | zannotate --geoip2 --geoip2-database=geoip2.mmdb