| Code | Name | Region |
|---|---|---|
| ATARB | Arbesthal | 3 |
| ATARI | Arbing | 4 |
| ATADG | Ardagger | 3 |
| ATAOT | Arnoldstein | |
| ATAIN | Aigen | 4 |
| ATAIG | Aigen Im Muhlkreis | |
| ATARO | Albersdorf | 6 |
| ATAKV | Alkoven | 4 |
| ATALE | Allentsteig | |
| ATALH | Allerheiligen | 6 |
| ATALL | Allhaming | 4 |
| ATNAL | Allhartsberg | 3 |
| ATAL9 | Alpbach | 7 |
| ATATH | Altach | 8 |
| ATATS | Altaussee | 6 |
| ATAL4 | Altenberg | 3 |
| ATAGZ | Altenberg Bei Linz | 4 |
| ATRUG | Altenburg | 3 |
| ATAMK | Altenmarkt | |
| ATALK | Altenmarkt Im Pongau | |
| ATAWH | Altenworth | 3 |
| ATAHI | Altheim | 4 |
| ATAHO | Althofen | |
| ATALT | Althofen | |
| AT | ||
| ATABC | Abfaltersbach | 7 |
| ATABS | Absam | 7 |
| ATABT | Abtenau | 5 |
| ATAWD | Abwinden | 4 |
| ATFG7 | Achau | |
| ATACK | Achenkirch | 7 |
| ATAND | Aderklaa | 3 |
| ATAWG | Adlwang | |
| ATADO | Admont | 6 |
| ATSAD | Adnet | 5 |
| ATAFR | Afritz | |
| ATAGG | Aggsbach Dorf | 3 |
| ATAGM | Aggsbach Markt | 3 |
| ATACH | Aich | 2 |