Regiocodes:
| ALM | Almere |
| AMS | Amsterdam |
| APD | Apeldoorn |
| BTL | Buitenland |
| FRY | Fryslân |
| GRN | Groningen |
| YSS | IJssellanden |
| KEN | Kennemerland |
| MBR | Midden Brabant |
| MZL | Midden Zuid Limburg |
| NEN | Noordoost-Brabant en Nijmegen |
| NHM | Noord-Holland Midden |
| NLI | Noord Limburg |
| NWE | Noordwest |
| TWN | Twente |
| UTR | Utrecht |
| VLA | Vlaanderen |
| WBR | West Brabant |
| ZDR | Zuid-Drenthe |
| ZHL | Zuid-Holland |
| ZLD | Zeeland |
| ZOB | Zuidoost-Brabant |
Interessegroepcodes:
| AF | Artificiele intelligentie |
| AN | Android |
| AP | Apple |
| BE | Beleggen |
| CP | Commodore |
| CU | CompUsers |
| DD | 3D |
| DM | FotoVideo |
| DO | Domotica-IoT |
| DR | Drones |
| FO | Forth |
| FS | Flightsimulator |
| GA | Games |
| GE | Genealogie |
| HN | Hobbynet |
| MO | Modelbaanautomatisering |
| MX | MSX |
| OP | Opensource |
| OS | eCS |
| PR | Programmeren |
| PZ | Postzegel |
| RB | Robotica |
| RT | Retro |
| SR | SeniorenAcademie |
| TB | Testbank |
| TS | Trainsim |
| WI | Windows |