| Place | Postal Code |
|---|---|
| Buenos Aires, Retiro | C1001, C1006, C1007, C1010, C1011, C1012, C1013, C1014, C1015, C1016, C1021, C1054, C1055, C1057, C1058, C1059, C1062, C1104, C1106 |
| 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 | |