| Place | Post Code |
|---|---|
| Buenos Aires, Monserrat | C1003, C1019, C1063, C1064, C1079, C1080, C1084, C1085, C1092, C1093, C1095, C1096, C1097, C1099, C1100, C1107 |
| All postal codes in Comuna 1 | |
|---|---|
| Constitución, Comuna 1 | |
| Monserrat, Comuna 1 | |
| Puerto Madero, Comuna 1 | |
| Retiro, Comuna 1 | |
| San Nicolás, Comuna 1 | |
| San Telmo, Comuna 1 | |