| Place | Post Code |
|---|---|
| Gerem, Grogol | 42438 |
| Gerogol/grogol, Grogol | 42436 |
| Grogol, Grogol | 42436 |
| Kotasari, Grogol | 42436 |
| Rawa Arum, Grogol | 42436 |
| All postal codes in Cilegon | |
|---|---|
| Cibeber, Cilegon | |
| Cilegon, Cilegon | |
| Citangkil, Cilegon | |
| Ciwandan, Cilegon | |
| Grogol, Cilegon | |
| Jombang, Cilegon | |
| Pulomerak, Cilegon | |
| Purwakarta, Cilegon | |