| Street | Odd | Even | Postal code |
|---|---|---|---|
| Aduana | 20303 | ||
| Agina | 20305 | ||
| Aguerre | 20301 | ||
| Aiako Harria | 20301 | ||
| Alarde | 20303 | ||
| Alberto Larzabal | 0000-0000 | 0002-0004 | 20302 |
| Alberto Larzabal | 0001-Final | 0006-9998 | 20303 |
| Alcaldia De Sacas | 20305 | ||
| Aldabe Mendia | 20301 | ||
| Aldaparo | 20305 | ||
| Aldapeta | 20302 | ||
| Alei | 20303 | ||
| Alfonso Morales | 20302 | ||
| Alhondiga | 20303 | ||
| Almirante Aritmendi | 20302 | ||
| Almirante Perez Portu | 20304 | ||
| Alondegia | 20303 | ||
| Alzukaitz | 20304 | ||
| Ama Birjina Mirarietakoaren | 20304 | ||
| Anaca Jaizubia Bidea | 20301 | ||
| Antonio Valverde | 20304 | ||
| Antonio Viglione | 20302 | ||
| Antzaran | 20301 | ||
| Araba | 20305 | ||
| Arana | 20302 | ||
| Aranibar | 20305 | ||
| Arantzateko Jauna | 20304 | ||
| Arbelaiz | 20304 | ||
| Arbesko-Errota | 20304 | ||
| Argentinar Errepublika | 20302 | ||