Area Code 618 – Colonia Hidalgo/Durango, DGO

Geographic Coverage and Administrative Jurisdiction

Area code 618 is a geographic National Destination Code (NDC) assigned to the state of Durango (DGO) in Mexico, specifically serving the capital city, Victoria de Durango, and its metropolitan area, including the historic Colonia Hidalgo neighborhood. The code covers the municipality of Durango and several surrounding localities within the Valle del Guadiana. As a geographic code, 618 is tied to a specific PSTN exchange area, meaning that calls to numbers with this prefix are routed to fixed-line infrastructure in that region. The Mexican Federal Telecommunications Institute (IFT) allocates this code to local wireline carriers operating in the state.

Dialing Formats and Caller Instructions

For local callers within the 618 area, the national dialing format requires the three-digit area code followed by a seven-digit subscriber number, yielding a total of ten digits: 618 XXX XXXX. When calling from another state in Mexico, dial the long-distance prefix 01 before the area code: 01 618 XXX XXXX. International callers must use Mexico's country calling code +52, dropping the leading trunk prefix: +52 618 XXX XXXX. For example, to reach a business in Colonia Hidalgo from the United States, you would dial 011 52 618 XXX XXXX (or +52 618 XXX XXXX on a mobile phone).

Overlay and Numbering Considerations

Currently, there is no overlay code for the Durango area; 618 remains the sole geographic code for the region. However, due to growing demand, the IFT has implemented number pooling and reassignment measures to optimize the use of existing seven-digit subscriber numbers. It is important to note that while 618 is a geographic code, some mobile operators may use it for numbers that are not tied to a fixed location, but such assignments are exceptions and are being phased out under IFT regulations. For fixed-line numbers, the geographic tie means that calls are routed based on the physical location of the exchange, which is crucial for emergency services and location-based services.

Practical Information for Callers

• Local calls within Durango: dial 618 + 7-digit number.
• National long-distance calls: dial 01 + 618 + 7-digit number.
• International calls to Durango: dial your country's exit code + 52 + 618 + 7-digit number.
• Emergency services (911) are reached without an area code.

When storing contacts in your phone, always use the international format +52 618 XXX XXXX to ensure proper dialing from anywhere in the world. This format is also recommended for VoIP and mobile users to avoid confusion with local dialing rules.