Area Code 2792 – Shibukawa, Gunma
The phone area code for Shibukawa, Gunma is 2792 (international format +812792). Browse local exchange codes (NXX) and carrier assignments below.
📍 Geographic Location of Shibukawa, Gunma
Overview of Area Code 2792
Area code 2792 is a geographic National Destination Code (NDC) within the Japanese numbering plan, assigned to the city of Shibukawa and its surrounding areas in Gunma Prefecture. Located in the northern Kanto region of Honshu, Shibukawa serves as a regional commercial and transportation hub. The code covers the city limits of Shibukawa, including districts such as Kanashima, Akagiyama, and parts of the neighboring town of Yoshioka (in Kitagunma District). It also encompasses the scenic Mount Akagi area, a popular destination for outdoor recreation.
Dialing Formats
When calling a landline in Shibukawa from within Japan, you must dial the trunk prefix 0, followed by the area code 2792, and then the subscriber number. The full national significant number (NSN) is 10 digits, excluding the leading 0. For example, a local number such as 45-6789 would be dialed as 02792-45-6789 from elsewhere in Japan.
For international callers, the leading 0 is omitted. You dial the Japanese country code +81, then the area code without the 0, followed by the subscriber number. The same example would be dialed as +81 2792 45 6789 from outside Japan.
Geographic Coverage and Administration
Shibukawa is part of Gunma Prefecture, which is governed by the Gunma Prefectural Government. The area code 2792 is one of several NDCs in Gunma; neighboring codes include 279 (Maebashi) and 278 (Isesaki). This code is administered by the Ministry of Internal Affairs and Communications (MIC) and allocated to Nippon Telegraph and Telephone East (NTT East) for fixed-line services.
Caller Instructions
For local callers within Shibukawa, dialing the subscriber number alone may be sufficient in some cases, but it is standard practice to include the area code to avoid misdialing. For callers from other regions in Japan, always prefix with 0. For international callers, ensure you use the correct country code and drop the leading 0. Be mindful of time zone differences (Japan Standard Time, UTC+9).
Overlay and Numbering Considerations
As of 2025, there is no overlay plan for area code 2792, meaning it serves exclusively the Shibukawa area. However, number portability allows subscribers to retain their numbers when switching between fixed-line carriers, but the geographic significance remains. When dialing, always verify the complete number to avoid errors.