Area Code 2619 – Omachi, Nagano

Overview of Area Code 2619

Area code 2619 is a geographic National Destination Code (NDC) within the Japanese numbering plan, specifically assigned to the city of Omachi and its surrounding areas in Nagano Prefecture. This code is part of the larger 0261 area code region, which covers the northern part of Nagano Prefecture, including the cities of Matsumoto, Azumino, and Omachi. The 2619 prefix is used for fixed-line (PSTN) services, and it is not assigned to mobile networks, which in Japan are identified by prefixes such as 070, 080, and 090.

Geographic Coverage and Administrative Jurisdiction

Omachi is a city located in the Hida Mountains (Northern Alps) region of Nagano Prefecture, known for its proximity to the Kurobe Dam and Tateyama Mountain Range. The area code 2619 covers the Omachi city area, including its central districts and surrounding rural communities. Administratively, Omachi is part of Nagano Prefecture, and the area code is managed by the Ministry of Internal Affairs and Communications (MIC) in Japan, with numbering assignments overseen by the Telecommunications Carriers Association (TCA).

Dialing Formats and Caller Instructions

For local callers within the 0261 area code region, dialing a number in Omachi requires only the subscriber number, which is typically 6 to 7 digits long. However, when calling from outside the 0261 area code but still within Japan, you must dial the trunk prefix '0' followed by the area code and subscriber number: 0-2619-XXXXXX. For example, a local number might be 0-2619-123456.

For international callers, the format is: +81 2619 XXXXXX, where the leading '0' of the area code is dropped. For instance, if the local number is 0-2619-123456, an international caller would dial +81 2619 123456. It is important to note that the area code 2619 is not an overlay; it is a distinct prefix within the 0261 area code, and no overlay codes have been introduced in this region.

Numbering Structure and Technical Considerations

Japanese fixed-line numbers are typically 10 digits in total, including the area code and subscriber number. In the case of 2619, the subscriber number is usually 6 digits, making the complete national number 10 digits (0-2619-XXXXXX). The 2619 prefix is a geographic allocation, meaning that the number is tied to a physical location, which is important for emergency services (110 for police, 119 for fire/ambulance) and for determining local call rates.

For businesses and residents in Omachi, the area code 2619 ensures that calls within the region are charged as local calls, while calls from other areas in Japan are subject to long-distance tariffs. VoIP services may also use this prefix, but they are required to provide location information for emergency calls. When dialing from abroad, callers should be aware that Japanese numbers do not require a trunk prefix, and the plus sign (+) is used to indicate the international access code.