区域列表
- 1921 XL - Akersloot, Castricum, Noord-Holland
- 1921 XM - Akersloot, Castricum, Noord-Holland
- 1921 XN - Akersloot, Castricum, Noord-Holland
- 1921 XP - Akersloot, Castricum, Noord-Holland
- 1921 XR - Akersloot, Castricum, Noord-Holland
- 1921 XS - Akersloot, Castricum, Noord-Holland
- 1921 XT - Akersloot, Castricum, Noord-Holland
- 1921 XV - Akersloot, Castricum, Noord-Holland
- 1921 XW - Akersloot, Castricum, Noord-Holland
- 1921 XX - Akersloot, Castricum, Noord-Holland
- 1921 XZ - Akersloot, Castricum, Noord-Holland
- 1921 ZA - Akersloot, Castricum, Noord-Holland