| Place | Post Code |
|---|---|
| Buenos Aires, San Telmo | C1063, C1064, C1065, C1098, C1099, C1103, C1107, C1143, C1147, C1152, C1153, C1163, C1165 |
| 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 | |