# RFC 8805 geofeed generator
> Build a geofeed CSV that IP geolocation vendors know how to read.
Fields are prefix, country (ISO 3166-1), region (ISO 3166-2), city, and postal. Host the file on HTTPS and point the registry’s geofeed remark at it. Publishing notes: [geofeed guide](https://ipinfo.fyi/guides/geofeed).
## Questions

### What is a geofeed?

A text file you host that says where your IP prefixes are. The format is RFC 8805: prefix, country, region, city, postal. One file can correct many databases. Do not list a customer’s home as the location of a shared mobile block.