| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Graden, Köflach | 8580, 8592, 8593 |
| Postal/ZIP Codes in Gradenberg, Köflach | 8580 |
| Postal/ZIP Codes in Köflach, Köflach | 8580 |
| Postal/ZIP Codes in Piber, Köflach | 8572, 8580, 8582 |
| Postal/ZIP Codes in Pichling bei Köflach, Köflach | 8580 |
| Postal/ZIP Codes in Puchbach, Köflach | 8580, 8591 |