Area Code 1155 – São Paulo - SP

Overview of Area Code 1155

Area code 1155 is a geographic prefix within the Brazilian National Numbering Plan, specifically allocated to the city of São Paulo, the capital of the state of São Paulo (SP). This code is part of the larger 11 area code region, which serves the Greater São Paulo metropolitan area. The prefix 1155 is used for fixed-line (PSTN) services and is assigned to local exchange areas within the city. As a geographic number, it is tied to a physical location, and its use is regulated by ANATEL (Agência Nacional de Telecomunicações), Brazil's telecommunications regulatory body.

Geographic Coverage and Jurisdiction

The 1155 prefix is used within the municipality of São Paulo, one of the largest cities in the world. It covers central and surrounding districts, including commercial and residential zones. The administrative jurisdiction falls under the São Paulo state government, but numbering is managed nationally by ANATEL. The prefix is part of the National Destination Code (NDC) 11, which encompasses the city and its immediate suburbs.

Dialing Formats and Instructions

For local callers within the 11 area code, dialing a number with prefix 1155 requires only the eight-digit subscriber number, which follows the prefix. For example, if the subscriber number is 1234-5678, the local dialing format is simply 1234-5678. However, when calling from outside the 11 area code but still within Brazil, you must dial the long-distance prefix (usually 0) followed by the operator code (e.g., 15 for Embratel, 21 for Claro, etc.), then the area code 11 and the subscriber number. For instance, from Rio de Janeiro, you would dial 0 15 11 1234-5678.

For international callers, the format is: +55 11 1234-5678. The country code for Brazil is +55, followed by the area code 11 (without the leading zero), and then the eight-digit subscriber number. Always drop the initial '0' when dialing from abroad.

Overlay and Numbering Considerations

As of 2025, the 11 area code does not have an overlay; it is the sole area code for the region. However, due to high demand, ANATEL has implemented number pooling and conservation measures. The 1155 prefix is one of many within the 11 region, and new numbers are allocated as needed. There are no plans for an overlay in the near future, but subscribers should be aware that local calls require only the eight-digit number.

Practical Guidance for Callers

When calling a São Paulo number with prefix 1155 from a mobile phone within Brazil, you may need to include the area code even if you are in the same region, depending on your carrier. It is always safe to dial the full number with the area code. For international callers, ensure you have the correct country and area codes. Always verify the subscriber number length, as Brazilian fixed-line numbers are eight digits after the area code.