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What Is a Geofeed?
A geofeed is a published file that maps IP address ranges to location information. Network operators use geofeeds to associate prefixes with geographic data so that downstream systems can interpret IP space more accurately.
In practice, geofeeds help provide a direct source of location data from the network operator rather than relying only on third-party inference. That makes them useful for IP geolocation research, operational reviews, and validation workflows.
The format is described in RFC 8805. A geofeed is a simple CSV file where each line associates an IP prefix with coarse location fields such as country, region, and city.
203.0.113.0/24,GB,GB-LND,London,
In this example, the prefix 203.0.113.0/24 is associated with London in the United Kingdom. The
trailing empty field means no postal code is included.
On openipdata.org, the geofeed directory collects discovered public geofeed URLs and shows the latest successful fetch time for each known feed. If you want the list of available sources, start there.