Area Code 3130 – Minas Gerais

Overview of Area Code 3130

Area code 3130 is a geographic prefix within the Brazilian national numbering plan, assigned to the state of Minas Gerais. Specifically, it serves the metropolitan region of Belo Horizonte, the state capital, and surrounding municipalities. This code is part of the larger 31 area code cluster, which covers central Minas Gerais, including cities such as Contagem, Betim, Nova Lima, and Sabará. The 3130 prefix is used for landline (PSTN) and fixed VoIP services, and it is not assigned to mobile numbers, which typically begin with 9 in Brazil.

Dialing Formats and Usage

For local calls within the 31 area code region, callers must dial the eight-digit subscriber number preceded by the area code. For example, to reach a number in Belo Horizonte, you would dial 31 3130-XXXX (where XXXX is the subscriber's line). When calling from outside the 31 area code but still within Brazil, the national trunk prefix '0' is required, followed by the carrier selection code (e.g., 0 15 31 3130-XXXX for Embratel). International callers must dial the Brazilian country code +55, then the area code 31, and the subscriber number: +55 31 3130-XXXX. Note that the leading '0' of the trunk prefix is not included in international dialing.

Geographic Coverage and Administrative Details

The 3130 prefix is allocated to the Belo Horizonte metropolitan area, which is the third-largest urban agglomeration in Brazil. The region is a major economic and technological hub, hosting numerous corporate headquarters, government offices, and service industries. The prefix is administered by ANATEL, Brazil's telecommunications regulatory agency, and is assigned to various fixed-line operators, including Vivo (Telefônica Brasil), Claro, and Oi, as well as smaller regional providers. Number portability is available, meaning that a number with the 3130 prefix may be served by any operator, but the geographic association remains unchanged.

Caller Instructions and Considerations

For local callers within the 31 area code, dialing the eight-digit number directly (without the area code) is generally sufficient for calls within the same municipality. However, to avoid confusion and ensure proper routing, it is recommended to always include the area code, especially in metropolitan regions with multiple municipalities. For long-distance calls from other Brazilian states, use the format: 0 + operator code + 31 + 3130-XXXX. For international callers, always use +55 31 3130-XXXX, omitting any leading zeros. Be aware that calls to 3130 numbers are billed as fixed-line tariffs, which are typically lower than mobile rates. If you are calling from abroad, ensure you have the correct international dialing prefix for your country (e.g., 011 from the US, 00 from many European countries) before the +55.