Area Code 237 – Moreno, Buenos Aires

Overview of Area Code 237

Area code 237 is a geographic National Destination Code (NDC) assigned to the city of Moreno and its surrounding administrative district, located in the western part of the Buenos Aires Province, Argentina. Moreno is part of the Greater Buenos Aires conurbation, lying approximately 37 kilometers west of the Autonomous City of Buenos Aires. The area code covers the entire Moreno Partido, which includes the city of Moreno itself and several localities such as La Reja, Francisco Álvarez, Cuartel V, and Trujui.

Dialing Formats

When calling a landline in Moreno from within Argentina, the national trunk prefix 0 is used, followed by the area code 237 and the subscriber number (which typically has 7 digits). The international format for calling from abroad is +54 237 followed by the subscriber number, omitting the trunk prefix.

• Local call (within Moreno): Dial the 7-digit subscriber number directly (if using a local line) or the full national format.
• National call (from other Argentine cities): Dial 0 237 + subscriber number. Example: 0 237 456-7890.
• International call (from outside Argentina): Dial your country's exit code, then 54 237 + subscriber number. Example: +54 237 456-7890.

Regulatory and Technical Notes

Argentina's numbering plan follows ITU-T E.164 recommendations. The area code 237 is part of the national numbering plan administered by the Ente Nacional de Comunicaciones (ENACOM). Historically, the Buenos Aires Province was divided into multiple area codes, and 237 was assigned to the Moreno region. It is important to note that due to the growth of the Buenos Aires metropolitan area, some adjacent regions may have different area codes, so callers should verify the correct code.

For fixed-line services, subscriber numbers are usually 7 digits long, but some newer lines may have 8 digits. Always confirm the exact number length with the recipient. Overlay plans have not been implemented for 237, so the area code is mandatory for all calls from outside the local area.

For callers within Moreno, local calls can be made using just the subscriber number, but for clarity and to avoid misdialing, it is recommended to use the full national format. For international callers, the plus sign (+) indicates the international access code, which varies by country (e.g., 011 from the US, 00 from most European countries).

As with all geographic numbers, calls to 237 are typically charged at standard national or international rates, depending on the caller's location. VoIP and mobile users may have different tariff structures, but the dialing format remains the same.