| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Aguada del Pito, Gastre | U9121 XBF |
| Postal/ZIP Codes in Bajada Moreno, Gastre | U9121 XBG |
| Postal/ZIP Codes in Carhue Niyeo, Gastre | U9121 XBH |
| Postal/ZIP Codes in Cerro Santa Ana, Gastre | U9100 XAD |
| Postal/ZIP Codes in Colelache, Gastre | U9121 XBJ |
| Postal/ZIP Codes in El Chacay Dpto Gastre, Gastre | U9121 XBI |
| Postal/ZIP Codes in El Escorial, Gastre | U9121 XAZ |
| Postal/ZIP Codes in Gastre, Gastre | U9121 XBA |
| Postal/ZIP Codes in Lagunita Salada, Gastre | U9121 XBB |
| Postal/ZIP Codes in Pirre Mahuida, Gastre | U9121 XBC |
| Postal/ZIP Codes in Plancuntre, Gastre | U9121 XBD |
| Postal/ZIP Codes in Sacanana, Gastre | U9121 XBE |