| Place | Postal Code |
|---|---|
| Buenos Aires, San Nicolás | C1001, C1003, C1005, C1009, C1010, C1012, C1013, C1015, C1017, C1019, C1022, C1023, C1036, C1037, C1042, C1043, C1049, C1050, C1053, C1054, C1055, C1073, 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 | |