| Code | Schemes | English name | Owner |
|---|---|---|---|
| TUA | Ankara | Turkey | — |
| NLA | Arnhem | Netherlands | — |
| GRA | Athens | — | — |
| RSB | Belgrade | Serbia | — |
| IAB | Bologna Ozzano (BO) | — | — |
| SKB | Bratislava | Slovakia | — |
| BLB | Bruxelles or Brussels | Belgium | — |
| ROB | Bucarest | Romania | — |
| HGB | Budapest | — | — |
| CTS | Colombian Tree Scheme | Colombia | — |
| DKC | Copenhagen | — | — |
| PLG | Gdansk; Varsovia | Poland | — |
| GET | Georgia Bird Ringing Scheme | Georgia | — |
| SFH | Helsinki Museum | Finland | — |
| DEH | Hiddensee | — | — |
| CIJ | Jersey | — | — |
| LIK | Kaunas (Zool. Mus.) | Lithuania | — |
| UKK | Kiev | Ukraine | — |
| POL | Lisboa | Portugal | — |
| SLL | Ljubljana | Slovenia | — |
| GBT | London (British Museum; Tring; Thetford) | — | — |
| ESI | Madrid (ICONA) | — | — |
| ETM | Matsalu | — | — |
| MX | Mexico | Mexico | — |
| BYM | Minsk | — | — |
RingBase adheres to EURING codes.
