The Osinaga city in Gipuzkoa province has 1 assigned the ZIP Code 20120.This same ZIP Code applies also to the following places.
| Province | City | ZIP Code |
|---|---|---|
| Gipuzkoa | Akerregi | 20120 |
| Gipuzkoa | Eziago | 20120 |
| Gipuzkoa | Hernani | 20120 |
| Gipuzkoa | Jauregi | 20120 |
| Gipuzkoa | Martindegi | 20120 |
| Gipuzkoa | Santa Barbara | 20120 |
| Gipuzkoa | Zikuñaga | 20120 |
Check out the list of Spain ZIP Code