Area Code 2384 – Yonezawa, Yamagata

Overview of Area Code 2384

Area code 2384 is a geographic destination code within the Japanese numbering plan, specifically assigned to the Yonezawa region in Yamagata Prefecture, located in the Tohoku area of Honshu, Japan. This code is part of the national dialing system governed by the Ministry of Internal Affairs and Communications (MIC) and follows ITU-T E.164 standards. When dialing internationally, the country code for Japan is +81, so the full international format for a Yonezawa number is +81 2384 XXXX (with the leading zero of the area code omitted).

Geographic Coverage and Administration

The 2384 area code serves the city of Yonezawa and its surrounding areas, including parts of the former Higashiokitama District. Yonezawa is known for its historical significance as a castle town and its production of Yonezawa beef. The area code covers the central business district, residential neighborhoods, and local government offices. As a geographic code, it is tied to specific physical locations, and calls are routed over the public switched telephone network (PSTN) to the corresponding central office.

Dialing Formats and Instructions

Within Japan, calls to Yonezawa numbers require dialing the area code including the leading zero. For example, to call a local number such as 1234, you would dial 02384 1234 from most parts of Japan. However, when calling from overseas, you must replace the leading zero with the country code, resulting in +81 2384 1234. It is important to note that the area code is not optional even for local calls within Yonezawa; the full 10-digit national number (including the area code) is always required.

Overlay and Numbering Considerations

Currently, there is no overlay code for the 2384 area; it remains a standalone code. However, as with all geographic codes in Japan, number portability is available, allowing users to retain their numbers when switching service providers. This does not affect the geographic significance of the code; numbers remain associated with the Yonezawa area for routing purposes.

Caller Instructions

For local callers within Yonezawa, simply dial the 10-digit number (area code + subscriber number). For callers from other regions in Japan, dial the same 10-digit number. For international callers, dial the international access prefix (e.g., 011 from the US, 00 from many countries), then Japan's country code 81, followed by the area code without the leading zero (2384) and the subscriber number. Example: +81 2384 5678.