Area Code 370 – Formosa, Formosa
The phone area code for Formosa, Formosa is 370 (international format +54370). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 370
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Formosa, Formosa
Overview of Area Code 370 (Argentina)
Area code 370 is a geographic National Destination Code (NDC) assigned to the province of Formosa in northeastern Argentina. It serves the provincial capital, also named Formosa, and its surrounding localities. This code is part of the Argentine national numbering plan, which follows ITU-T E.164 recommendations. The full international dialing format for a fixed-line number in this region is +54 370 XXX XXXX.
Geographic Coverage and Administrative Jurisdiction
The 370 area code covers the entire province of Formosa, including the capital city of Formosa (often referred to as Formosa Capital) and other towns such as Clorinda, Pirané, and Ingeniero Juárez. The province borders Paraguay to the west and north, and the area code is administratively managed by the Ente Nacional de Comunicaciones (ENACOM), Argentina's national telecommunications regulator.
Dialing Formats and Caller Instructions
For local callers within the 370 area code, the standard local dialing format is the seven-digit subscriber number alone (e.g., 445 6789). For national long-distance calls from other Argentine provinces, callers must dial 0 followed by the area code and the subscriber number: 0 370 445 6789. For international callers, the format is +54 370 445 6789 (or 54 370 445 6789 when using an international trunk prefix like 011 from the US).
Overlay and Numbering Considerations
As of the latest ENACOM updates, there is no overlay code for the 370 area; it remains a standalone geographic code. However, the Argentine numbering plan has been transitioning to a closed dialing format, meaning that for national calls, the trunk prefix '0' and the area code must always be dialed, even for calls within the same province but outside the local area. This is important for both residential and business users.
Practical Usage and Economic Context
Formosa is a key economic hub for agriculture, livestock, and forestry in the region. Fixed-line services are primarily provided by Telecom Argentina, with some alternative operators offering local loops. When contacting businesses or government offices in Formosa, it is essential to use the correct international format to avoid misrouting. For VoIP users, ensure that your service provider supports the correct country and area code routing to reach numbers in the 370 region.