Area Code 2559 – Yasuzuka, Niigata
The phone area code for Yasuzuka, Niigata is 2559 (international format +812559). Browse local exchange codes (NXX) and carrier assignments below.
📍 Geographic Location of Yasuzuka, Niigata
Overview of Area Code 2559
Area code 2559 is a geographic National Destination Code (NDC) assigned to the Yasuzuka area, located in the Jōetsu region of Niigata Prefecture, Japan. This code is part of the Japanese numbering plan administered by the Ministry of Internal Affairs and Communications (MIC) and follows the ITU-T E.164 standard. When dialing internationally, the full number format is +81 2559 XXXX (where XXXX is the subscriber number).
Geographic Coverage and Administrative Jurisdiction
The 2559 area code serves the former town of Yasuzuka, which was merged into the city of Jōetsu in 2005. The coverage area includes the mountainous eastern part of Jōetsu, bordering Nagano Prefecture. Key localities served include Yasuzuka, Oshima, and Maki. The region is known for its scenic landscapes, hot springs, and ski resorts, attracting both domestic and international visitors.
Dialing Formats and Instructions
For local callers within the 2559 area, the number is dialed as 2559-XXXXX (10 digits total, including the area code). For callers from other regions in Japan, dial 0259-XXXXX (the leading 0 is used for domestic trunk prefix). International callers from outside Japan must dial +81 2559 XXXXX, omitting the leading zero. For example, a local number might be +81 2559 12345.
Note that Japan uses a closed numbering plan; the area code is an integral part of the subscriber number. There are no overlay codes in this region, so the 10-digit format remains consistent.
Caller Instructions
- Local callers: Dial the 10-digit number directly (e.g., 2559-12345).
- Domestic long-distance callers: Dial 0, then the area code and subscriber number (e.g., 0259-12345).
- International callers: Dial your country's exit code, then Japan's country code 81, then the area code without the leading 0, and the subscriber number (e.g., +81 2559 12345).
PSTN and VoIP Considerations
This area code is primarily associated with traditional PSTN (fixed-line) services. However, with the rise of VoIP, many businesses and residents use IP-based services that may present a different caller ID. Nevertheless, the geographic significance of the code remains for routing and emergency services. When calling from abroad, be aware that some VoIP providers may require the full international format to correctly route the call.