Area Code 86 – Piauí
The phone area code for Piauí is 86 (international format +5586). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 86
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Piauí
Overview of Area Code 86
Area code 86 is a geographic National Destination Code (NDC) within the Brazilian telephone numbering plan, assigned to the state of Piauí, located in the Northeast Region of Brazil. It serves the state capital, Teresina, and numerous surrounding municipalities. The code is used for fixed-line (PSTN) services, and it is administered under the regulations of the National Telecommunications Agency (ANATEL).
Geographic Coverage and Major Cities
The 86 area code covers a significant portion of Piauí, including the capital Teresina and other important cities such as Parnaíba, Piripiri, Campo Maior, and Barras. Teresina is the largest city and the political and economic hub of the state. The region is characterized by a mix of urban and rural areas, with telecommunications infrastructure supporting both residential and business needs.
Dialing Formats
For local calls within the same area code, Brazilian fixed-line numbers have 8 digits, and the standard format is XXXX-XXXX. When dialing from a mobile phone within Brazil, you must add the area code, resulting in 86 XXXX-XXXX. For international callers, the full international format is +55 86 XXXX-XXXX (or 0055 86 XXXX-XXXX when using international exit codes).
Example: To call a fixed line in Teresina with the local number 3221-1000, you would dial:
- Local (within area code 86): 3221-1000
- National (from other Brazilian area codes): 86 3221-1000
- International (from abroad): +55 86 3221-1000
Overlay and Numbering Considerations
Currently, there is no overlay code for area 86; it is the sole geographic area code for the region. However, due to growing demand, ANATEL has implemented number pooling and other measures to ensure sufficient numbering resources. It is important to note that mobile numbers in Brazil always have 9 digits (starting with 9) and are non-geographic, but they are assigned to the same area code as the user's location. Thus, a mobile number in Teresina would appear as +55 86 9XXXX-XXXX.
Caller Instructions
For local callers within Piauí, simply dial the 8-digit number for fixed lines. For callers from other Brazilian states, you must dial the area code 86 before the subscriber number. International callers should use the country code +55 followed by 86 and the local number. Remember to drop any leading trunk prefix (0) when dialing internationally. For example, if you are calling from the United States, you would dial 011 55 86 XXXX-XXXX.
Always verify the correct number length and format with your service provider, as some numbers may have been migrated or ported. For any emergency services, use the national emergency numbers (190 for police, 192 for ambulance) which do not require an area code.