Card: RegionCode is the GeoNames admin-1 code, not ISO 3166-2

README.md

@@ -28,7 +28,7 @@ A free, monthly dataset of the **routed IPv4 address space** at **`/24` granular
 
 | Group | Fields |
 | --- | --- |
-| **Geolocation** | `CountryCode`, `ContinentCode`, `IsInEU`, `RegionCode` (ISO 3166-2), `RegionName`, `CityName`, `CityNameAscii`, `CityGeonameId` (GeoNames ID), `CityFeatureCode` (GeoNames place type), `Latitude`, `Longitude`, `AccuracyRadius`, `TimeZone` |
+| **Geolocation** | `CountryCode`, `ContinentCode`, `IsInEU`, `RegionCode` (GeoNames admin-1 code), `RegionName`, `CityName`, `CityNameAscii`, `CityGeonameId` (GeoNames ID), `CityFeatureCode` (GeoNames place type), `Latitude`, `Longitude`, `AccuracyRadius`, `TimeZone` |
 | **Network / ASN** | `ASNID`, `ASNName`, `ASNOrg`, `ASNDomain`, `ASNType` (ISP / hosting / business / education / government) |
 | **Ownership (WHOIS)** | `Company`, `CompanyCountry`, `WhoisNetName`, `AbuseContact` |
 | **Registry (RIR)** | `RIR` (ARIN/RIPE/APNIC/LACNIC/AFRINIC), `RIRAllocationDate`, `RIRStatus` |