Area Code 64 – Osorno, Los Lagos

Geographic Overview

The +56 64 country-code/area-code combination corresponds to a geographic numbering plan area in Chile, specifically serving the city of Osorno and its surrounding communes within the Los Lagos Region. This region, located in southern Chile, is an important agricultural and industrial hub. The area code 64 is allocated under Chile's national numbering plan, which follows ITU-T E.164 recommendations. It is used for fixed-line (PSTN) services, and increasingly for VoIP-based fixed services, but it is not assigned to mobile networks.

Dialing Formats

When calling a fixed line in Osorno from within Chile, the national trunk prefix '0' is used before the area code, followed by the subscriber number. The complete national significant number (NSN) is eight digits, comprising the two-digit area code (64) and a six-digit subscriber number. For example, a local number 123456 would be dialed as 064 123456 from other parts of Chile. When calling from abroad, the international access prefix (typically '00' or '+') is used, followed by Chile's country code 56, the area code 64 (without the leading '0'), and the subscriber number. Thus, the international format is +56 64 123456.

Local vs. International Caller Instructions

For callers within Osorno, local calls can often be made using only the six-digit subscriber number (depending on the operator's dialing plan). However, for clarity and to avoid misdialing, it is recommended to use the full national format. For international callers, it is essential to omit the trunk prefix '0' and always include the +56 country code. For example, a caller from the United States would dial 011 56 64 123456, while a caller from a European country would dial 00 56 64 123456.

Geographic Coverage and Administration

The area code 64 covers the province of Osorno, including the capital city Osorno and neighboring localities such as Puerto Octay, Purranque, Río Negro, and San Juan de la Costa. These areas are part of the Los Lagos Region, which is known for its dairy farming, livestock, and tourism. The numbering plan is administered by the Subsecretaría de Telecomunicaciones (SUBTEL) of Chile, which ensures that geographic codes are assigned to specific regions and are used for fixed-line services.

Overlays and Number Portability

As of the latest updates, there are no overlay codes for the Osorno area; the 64 code is exclusive to this geographic region. However, Chile has implemented number portability for both fixed and mobile services. This means that a subscriber may retain their 64 number even if they switch service providers, but the number remains associated with the geographic area. It is important to note that if you are calling a number that has been ported to a mobile network, the call may be routed differently, but the dialing format remains the same.

Practical Usage

For businesses and individuals in Osorno, having a local geographic number provides a local presence and can reduce costs for customers calling from within the region. For those outside Chile, using the +56 64 prefix is straightforward and ensures proper routing to the intended party. Always verify the subscriber number length, as it is consistently six digits for this area code.