| Place | Postal Code |
|---|---|
| Buenos Aires, Constitución | C1077, C1080, C1099, C1100, C1103, C1133, C1135, C1137, C1147, C1148, C1152, C1153, C1260, C1272, C1280, C1295 |
| 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 | |