| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Blumegg, Lannach | 8502, 8503 |
| Postal/ZIP Codes in Breitenbach in der Weststeiermark, Lannach | 8502 |
| Postal/ZIP Codes in Heuholz, Lannach | 8502 |
| Postal/ZIP Codes in Hötschdorf, Lannach | 8502 |
| Postal/ZIP Codes in Lannach, Lannach | 8502, 8503 |
| Postal/ZIP Codes in Sajach, Lannach | 8502 |
| Postal/ZIP Codes in Teipl, Lannach | 8502, 8503, 8511 |