รายชื่อภูมิภาค
- 8121 ZD - Olst, Olst-Wijhe, Overijssel
- 8121 ZE - Olst, Olst-Wijhe, Overijssel
- 8121 ZG - Olst, Olst-Wijhe, Overijssel
- 8121 ZH - Olst, Olst-Wijhe, Overijssel
- 8121 ZJ - Olst, Olst-Wijhe, Overijssel
- 8121 ZK - Olst, Olst-Wijhe, Overijssel
- 8121 ZL - Olst, Olst-Wijhe, Overijssel
- 8121 ZM - Olst, Olst-Wijhe, Overijssel
- 8121 ZN - Olst, Olst-Wijhe, Overijssel
- 8121 ZP - Olst, Olst-Wijhe, Overijssel
- 8121 ZR - Olst, Olst-Wijhe, Overijssel
- 8121 ZS - Olst, Olst-Wijhe, Overijssel
- 8121 ZT - Olst, Olst-Wijhe, Overijssel
- 8121 ZV - Olst, Olst-Wijhe, Overijssel
- 8121 ZW - Olst, Olst-Wijhe, Overijssel
- 8121 ZX - Olst, Olst-Wijhe, Overijssel