Area Code 2696 – Iiyama, Nagano

Geographic Overview

The +81 2696 prefix is a geographic National Destination Code (NDC) assigned to the city of Iiyama (飯山市) in Nagano Prefecture, Japan. This area code forms part of the larger Iiyama telephone exchange area, which also covers the neighboring towns of Nozawaonsen (野沢温泉村) and Kijimadaira (木島平村). The region is located in the northern part of Nagano Prefecture, near the border with Niigata Prefecture, and is known for its mountainous terrain, ski resorts, and hot springs. The administrative jurisdiction falls under the Iiyama City Office, and the area is served by NTT East (Nippon Telegraph and Telephone East Corporation) as the primary local exchange carrier.

Dialing Formats

When calling a landline in Iiyama from within Japan, subscribers must dial the trunk prefix 0, followed by the area code 2696 and the subscriber number (typically 4 to 6 digits). For example, a local number might be dialed as 0-2696-XXXXXX. However, from outside Japan, callers must use the international access code (e.g., 011 from the US, 00 from most countries), followed by Japan's country code +81, then the area code without the leading zero, and the subscriber number. Thus, the international format becomes +81-2696-XXXXXX. It is important to note that the area code 2696 is not an overlay; it is a standalone code serving a specific geographic region.

Caller Instructions

For local callers within the Iiyama exchange area, dialing the subscriber number alone may be sufficient for calls within the same exchange, but for calls from other parts of Japan, the full national format (0-2696-XXXXXX) is required. International callers should always use the +81 country code and omit the initial zero. For example, to call a number in Iiyama from the United States, one would dial 011 81 2696 XXXXXX. From the United Kingdom, the sequence would be 00 81 2696 XXXXXX.

Regulatory and Technical Notes

Under the Japanese Numbering Plan, geographic area codes are allocated by the Ministry of Internal Affairs and Communications (MIC) and are used for fixed-line services. As of the 2020s, NTT East has been migrating legacy PSTN services to IP-based networks, but the dialing format remains unchanged. Number portability is available for fixed-line services, allowing subscribers to retain their numbers when switching carriers within the same geographic area. However, the geographic significance of the code remains, and it cannot be used for mobile or non-geographic services.