Area Code 2795 – Shibukawa, Gunma

Overview of Area Code 2795

Area code 2795 is a geographic prefix within the Japanese numbering plan, specifically allocated to the city of Shibukawa in Gunma Prefecture. Shibukawa is located in the northern Kanto region of Honshu, Japan's main island, and serves as a regional commercial and transportation hub. The code follows the ITU-T E.164 standard, with Japan's country calling code +81, and is used for fixed-line (PSTN) services within the designated service area.

Geographic Coverage and Administration

The 2795 area code covers Shibukawa City and its surrounding administrative districts, including parts of the former Kitagunma and Tone counties. The service area is defined by the Ministry of Internal Affairs and Communications (MIC) and is operated by NTT East, the regional incumbent carrier. Shibukawa is known for its hot springs (onsen) and as a gateway to the Ikaho and Minakami resort areas, which influences the demand for both residential and business lines.

Dialing Formats

For local calls within the same area code (i.e., within Shibukawa and its environs), callers can dial the subscriber number (typically 6 digits) without the area code. For calls from other regions within Japan, the full national number must be dialed: 0-2795-XXXXXX. From abroad, callers must use the international format: +81-2795-XXXXXX (the leading '0' is omitted). For example, a local number 123456 would be dialed as 0-2795-123456 domestically and +81-2795-123456 internationally.

Numbering Structure and Overlays

The subscriber numbers within the 2795 area code are six digits long, making the total national significant number (NSN) 10 digits when including the leading '0' and the area code. Currently, there is no overlay code in this region, meaning that 2795 is the sole area code for the Shibukawa exchange. However, as with all Japanese geographic codes, the MIC periodically reviews numbering resources to ensure sufficient capacity, and future overlays are possible if demand increases.

Caller Instructions

For local callers within Shibukawa, simply dial the 6-digit subscriber number. For callers from other parts of Japan, dial the full 10-digit national number (0-2795-XXXXXX). For international callers, dial your country's exit code (e.g., 011 from the US, 00 from most European countries), followed by Japan's country code 81, then the area code without the leading '0' and the subscriber number: +81 2795 XXXXXX. Ensure you omit the initial '0' when dialing from abroad.

Service Considerations

As a geographic number, 2795 is primarily used for fixed-line services, including traditional PSTN and IP telephony (e.g., NTT's Hikari Denwa). Businesses in the area often use these numbers to establish a local presence. While number portability exists in Japan, it is primarily for mobile numbers; fixed-line portability is limited and subject to carrier policies. For VoIP services, the physical location of the caller does not affect the number, but the number's geographic association remains for regulatory and emergency services (e.g., 110 police, 119 fire/ambulance) routing.