| Localité | Code postal |
|---|---|
| Aurora, Ullum | J5409 XAP |
| Barrio Agua y Energia, Ullum | J5409 XAQ |
| Barrio Colon, Ullum | J5409 XAR |
| Barrio Graffigna, Ullum | J5409 XAO |
| Bodega Graffigna, Ullum | J5409 XAM |
| Camp D P V La Cienaga, Ullum | J5409 XAS |
| Cerro La Ventanita, Ullum | J5409 XBA |
| Cerro Tambolar, Ullum | J5409 XBB |
| Cerro Villa Loncito, Ullum | J5409 XBC |
| Cienaguita, Ullum | J5409 XAU |
| El Chilote, Ullum | J5409 XBD |
| Est La Cienaga de Gualila, Ullum | J5409 XAN |
| Imsa, Ullum | J5409 XBE |
| Isla del Sauce, Ullum | J5409 XAV |
| Matagusanos, Ullum | J5419 XAN |
| Mina Gualilan, Ullum | J5409 XAW |
| Port del Colorado, Ullum | J5409 XAX |
| Refugio D P V, Ullum | J5409 XAY |
| Refugio Los Gauchos, Ullum | J5409 XAZ |
| Talacasto, Ullum | J5400 XAH |
| Ullum, Ullum | J5414 |
| Codes postaux en San Juan | |
|---|---|
| Zonda | Valle Fértil |
| Ullum | Sarmiento |
| Santa Lucía | San Martín |
| Rivadavia | Rawson |
| Pocito | Jáchal |
| Iglesia | Chimbas |
| Caucete | Capital |
| Calingasta | Angaco |
| Albardón | 9 de Julio |
| 25 de Mayo | |