3218 is the Postal Code/ZIP Code for the of San Carlos in the El Salvador Department of Morazán and the Municipality of San Carlos.
| Postal Code | 3218 |
| Postal Code Name | San Carlos |
| Department | Morazán Department |
| Municipality | San Carlos Municipality |
| Timezone | Central Standard Time (CST) |
| Adjacent Postal Codes | 3201 3207 3225 3301 |