RFC 8805

Publish a geofeed for your prefixes

A geofeed is a text file you host that says where your IP prefixes are. The format is RFC 8805. Vendors, including MaxMind, IPinfo, ipapi.is, and DB-IP, know how to read it. One file corrects many databases. A one-off form corrects one database, once.

The file

Each line is prefix,country,region,city,postal. Country is ISO 3166-1, region is ISO 3166-2. Leave a field empty by keeping the comma. Use the generator so the commas stay in the right places.

Publishing it

Put the file at a public HTTPS URL. Then point the registry at it. In a RIPE inetnum or inet6num, a geofeed: remark is the usual hook. ARIN and others have their own fields; follow that registry’s current instructions rather than a blog from 2019. After it is public, submit the same URL to the correction forms on the location checker so vendors that do not poll the registry still see it.

Only publish locations you are willing to state in public. Do not list a customer’s home as the location of a shared mobile block.