2304 is the Postal Code/ZIP Code for the of Caluco in the El Salvador Department of Sonsonate and the Municipality of Caluco.
| Postal Code | 2304 |
| Postal Code Name | Caluco |
| Department | Sonsonate Department |
| Municipality | Caluco Municipality |
| Timezone | Central Standard Time (CST) |
| Adjacent Postal Codes | 2301 2305 2306 2316 |