Area Code 23 – Santiago, Metropolitan Region

Overview of Chile's Area Code 23

Area code 23 is a geographic National Destination Code (NDC) assigned to the Santiago Metropolitan Region of Chile. This region encompasses the national capital, Santiago, and its surrounding communes, serving as the political, financial, and cultural heart of the country. The code 23 is part of Chile's transition to an 8-digit subscriber numbering plan, which was implemented to accommodate the growing demand for telecommunication services.

Geographic Coverage and Administrative Jurisdiction

The code 23 covers the entire Metropolitan Region, including the city of Santiago and its suburbs. This area is the most densely populated in Chile, hosting major government institutions, corporate headquarters, and international organizations. The region is divided into several communes, such as Providencia, Las Condes, Ñuñoa, and Maipú, all of which fall under the 23 NDC.

Dialing Formats and Caller Instructions

For local callers within Chile, dialing a number in the Santiago Metropolitan Region requires the prefix 2 followed by the two-digit area code 23, resulting in the trunk prefix 2 + 23 + subscriber number. The complete national subscriber number is 8 digits long. For example, a local call to a fixed line in Santiago would be dialed as 2 23XX XXXX.

For international callers, the format is: +56 2 23XX XXXX. The country code for Chile is +56, followed by the trunk prefix 2, the area code 23, and the 6-digit subscriber number. It is important to note that the leading '0' used in domestic dialing is omitted when calling from abroad.

Overlay Considerations and Numbering Plan

In 2012, Chile implemented an overlay for the Santiago region, adding the digit '2' to all existing numbers. This means that the previous 7-digit numbers were prefixed with '2', and new numbers were assigned with the '2' prefix. As a result, the area code 23 is part of a larger numbering block that includes other codes such as 22, 24, 25, 26, 27, 28, and 29, all serving the same geographic area. This overlay eliminated the need for area code changes and allowed for a larger pool of numbers.

Practical Examples

To illustrate, consider a business in Santiago with the local number 2 23 456 789. A caller from abroad would dial +56 2 23 456 789. A caller from another region in Chile (e.g., Valparaíso) would dial 2 23 456 789 without the country code. It is essential to use the correct format to ensure successful connection.