The Aia (Ataun) city in Gipuzkoa province has 1 assigned the ZIP Code 20211.This same ZIP Code applies also to the following places.
| Province | City | ZIP Code |
|---|---|---|
| Gipuzkoa | Ataun | 20211 |
| Gipuzkoa | San Gregorio | 20211 |
| Gipuzkoa | San Martin | 20211 |
Check out the list of Spain ZIP Code