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Japan ☎️ Landline / Geographic

Area Code 2648 – Nagano, Nagano

The phone area code for Nagano, Nagano is 2648 (international format +812648). Browse local exchange codes (NXX) and carrier assignments below.

Current Local Time
13:32:18
Asia/Tokyo • UTC +09:00
Full Dialing Format
+812648
Population 372,760
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Admin Region Nagano
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Elevation 372m
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GPS Coordinates 36.6500, 138.1833
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📍 Geographic Location of Nagano, Nagano

Geographic Coverage and Administrative Jurisdiction

The area code 2648 is a geographic National Destination Code (NDC) within the Japanese numbering plan, allocated to the Nagano region of Nagano Prefecture. Specifically, it serves the city of Nagano and its surrounding municipalities, including the former towns of Shinonoi, Kawanakajima, and parts of the greater Nagano basin. Administratively, this code falls under the jurisdiction of the Ministry of Internal Affairs and Communications (MIC) and is managed by Nippon Telegraph and Telephone (NTT) East, which oversees the fixed-line telecommunications infrastructure for the region.

Dialing Formats and Caller Instructions

For local callers within the 2648 area code, the standard local dialing format is the 7-digit subscriber number alone (e.g., XX-XXXX). However, when calling from outside the area code but still within Japan, you must dial the trunk prefix 0 followed by the area code and subscriber number: 0-2648-XX-XXXX. For international callers, the format is +81-2648-XX-XXXX (drop the leading zero). For example, to reach a business in Nagano City from abroad, you would dial +81 2648 12 3456.

Overlay and Numbering Considerations

Currently, the 2648 area code does not have an overlay code, meaning it is the sole geographic code for this region. Subscriber numbers within this code are typically 7 digits long, but some legacy numbers may be shorter. The area code is part of the broader Nagano Prefecture numbering plan, which includes several other codes such as 261 (Matsumoto) and 265 (Iida). This segmentation ensures efficient routing and resource allocation across the prefecture.

Services and Usage

This geographic code is primarily used for fixed-line PSTN services, including residential and business lines. It also supports ISDN and some VoIP services that are tied to physical locations. While mobile numbers in Japan use separate prefixes (e.g., 090, 080, 070), the 2648 code is exclusively for landlines. Callers should note that calls to this code from mobile phones within Japan are charged at standard domestic rates, and international calling rates apply for overseas calls.

❓ Frequently Asked Questions

What is the international dialing format for a number in Nagano with area code 2648?
To call a number in Nagano (area code 2648) from outside Japan, dial your country's exit code, then Japan's country code 81, then the area code without the leading zero (2648), followed by the subscriber number. For example: +81 2648 123 456.
Is 2648 a mobile or landline prefix?
2648 is a geographic landline prefix for the Nagano area. Mobile numbers in Japan start with 070, 080, or 090 and are not tied to a specific area code.
Do I need to dial the area code when calling locally within Nagano?
When calling from a landline within the same 2648 area code, you can usually dial just the 7-digit subscriber number. However, from mobile phones or outside the area, you must dial 0-2648 followed by the number.
Are there any overlay codes for 2648?
No, there is no overlay code for 2648. It remains the sole area code for the Nagano City region, and all fixed-line numbers in that area use this code.
What is the cost of calling a 2648 number from abroad?
The cost depends on your international calling plan. Typically, calls to Japanese landlines are billed at a higher rate than domestic calls, but many VoIP or international calling cards offer reduced rates. Check with your service provider for specific charges.