Area Code 3543 – Córdoba, Córdoba

Overview of Area Code 3543

Area code 3543 is a geographic National Destination Code (NDC) assigned to the central region of Argentina, specifically covering the western sector of Córdoba Province. The primary city served is Argüello, a suburban locality within the Greater Córdoba metropolitan area, along with surrounding towns and rural zones. This code is part of the Argentine national numbering plan, which follows ITU-T E.164 recommendations, with a total national significant number (NSN) length of 10 digits (excluding the country code +54).

Geographic Coverage and Administrative Jurisdiction

The 3543 area code encompasses the department of Colón and parts of the Capital Department, including localities such as La Calera, Villa Allende, Mendiolaza, and Unquillo. These areas are integrated into the urban sprawl of Córdoba City, the provincial capital, but maintain distinct local dialing areas. The region is governed by the Enacom (Ente Nacional de Comunicaciones), Argentina's national telecommunications regulator, which oversees numbering resource allocation and local call routing.

Dialing Formats and Caller Instructions

For local calls within the 3543 area code, subscribers can dial the 7-digit local subscriber number directly, without the area code. For example, to call a fixed line in Argüello, a local caller would dial 456-7890.

For calls from other area codes within Argentina (but outside 3543), the caller must dial the national trunk prefix 0, followed by the area code and the subscriber number: 0-3543-456-7890. This format is mandatory for all domestic long-distance calls.

For international callers, the format is: +54 3543 456-7890 (or +54 9 3543 456-7890 when calling a mobile number, though mobile numbers in Argentina typically use the 9 after the country code for calls from abroad). Note that the leading '0' is omitted when dialing from outside Argentina.

Overlay and Numbering Considerations

As of 2024, there is no overlay code for 3543; the area code serves a well-defined geographic region. However, due to the proximity to Córdoba City (area code 351), some numbers in the western zone may be transitioning to accommodate increased demand. Subscribers should verify the correct dialing format with their service provider if they experience routing issues.

PSTN and VoIP Integration

Traditional PSTN lines and VoIP services operate under the same numbering plan, ensuring seamless interoperability. VoIP users can assign geographic numbers from 3543, but must register their physical location for emergency services. For businesses, using a 3543 number establishes a local presence in the Córdoba region, which can enhance customer trust and reduce long-distance charges for local clients.