क्षेत्र सूची
- 6121 SH - Born, Sittard-Geleen, Limburg
- 6121 SJ - Born, Sittard-Geleen, Limburg
- 6121 WZ - Born, Sittard-Geleen, Limburg
- 6121 XA - Born, Sittard-Geleen, Limburg
- 6121 XB - Born, Sittard-Geleen, Limburg
- 6121 XC - Born, Sittard-Geleen, Limburg
- 6121 XD - Born, Sittard-Geleen, Limburg
- 6121 XE - Born, Sittard-Geleen, Limburg
- 6121 XG - Born, Sittard-Geleen, Limburg
- 6121 XH - Born, Sittard-Geleen, Limburg
- 6121 XJ - Born, Sittard-Geleen, Limburg
- 6121 XK - Born, Sittard-Geleen, Limburg
- 6121 XL - Born, Sittard-Geleen, Limburg
- 6121 XM - Born, Sittard-Geleen, Limburg
- 6121 XN - Born, Sittard-Geleen, Limburg
- 6121 XP - Born, Sittard-Geleen, Limburg
- 6121 XR - Born, Sittard-Geleen, Limburg
- 6121 XS - Born, Sittard-Geleen, Limburg
- 6121 XT - Born, Sittard-Geleen, Limburg
- 6121 XV - Born, Sittard-Geleen, Limburg