Area Code 3751 – Eldorado, Misiones

Overview of Area Code 3751 (Eldorado, Misiones)

Area code 3751 is a geographic National Destination Code (NDC) assigned to the city of Eldorado and its surrounding localities within the Province of Misiones, Argentina. This code is part of the national numbering plan administered under ITU-T E.164, with Argentina's country calling code +54. The region is situated in the northeastern part of the country, near the Paraná River, and serves as a commercial and agricultural hub for the Alto Paraná corridor.

Geographic Coverage and Jurisdiction

The 3751 area code covers Eldorado, the administrative seat of the Eldorado Department, along with nearby towns such as 9 de Julio, Colonia Victoria, and Dos de Mayo (though Dos de Mayo may use a different code; verify). The area is part of the Misiones province, which borders Paraguay and Brazil. The code is managed by the Ente Nacional de Comunicaciones (ENACOM), Argentina's national regulatory body for telecommunications.

Dialing Formats

For local calls within the same area code (Eldorado and its immediate vicinity), subscribers typically dial the 7-digit local number directly. However, due to the national numbering plan, the area code is often required even for local calls depending on the operator's configuration. For calls from other regions within Argentina, the format is:

• National (domestic) dialing: 0 + 3751 + local number (e.g., 0 3751 456789).
• International dialing from abroad: +54 3751 + local number (e.g., +54 3751 456789).

Note that the leading '0' is a trunk prefix used only within Argentina; it is omitted when calling from outside the country. The local number length is typically 7 digits, but some older lines may have 6 digits; always confirm with the service provider.

Caller Instructions

For local callers (within Eldorado): If your operator requires area code for local calls, dial 3751 followed by the subscriber number. Otherwise, dial the 7-digit number directly. For national callers (from other Argentine provinces): Dial 0, then the area code 3751, then the subscriber number. For international callers: Dial your country's exit code (e.g., 011 from the US, 00 from many European countries), then Argentina's country code 54, then the area code 3751 (without the leading 0), and finally the subscriber number.

Overlay and Numbering Considerations

As of the latest ENACOM updates, there is no overlay code for 3751; the area code is exclusive to this geographic region. However, number portability is available for fixed lines, allowing users to retain their numbers when changing operators within the same geographic area. This does not affect the dialing format.

For businesses or individuals planning to contact Eldorado, it is essential to use the correct international prefix and country code to ensure successful call completion. VoIP and mobile users should also note that calls to geographic numbers are typically charged at local rates when using a local access number, but international rates apply when calling from abroad.