Area Code 1537 – Nakashibetsu, Hokkaido
The phone area code for Nakashibetsu, Hokkaido is 1537 (international format +811537). Browse local exchange codes (NXX) and carrier assignments below.
📍 Geographic Location of Nakashibetsu, Hokkaido
Overview of Area Code 1537
Area code 1537 is a geographic National Destination Code (NDC) within the Japanese telephone numbering plan, assigned to the town of Nakashibetsu in the Kushiro Subprefecture of Hokkaido Prefecture. This code serves the eastern part of Hokkaido, an area known for its dairy farming and the nearby Shiretoko Peninsula, a UNESCO World Heritage site. The code is administered under the Ministry of Internal Affairs and Communications (MIC) and is allocated to fixed-line services, including PSTN and NTT East's landline network.
Geographic Coverage and Dialing Formats
The 1537 area code covers Nakashibetsu town and its surrounding rural districts. For local calls within the same area code, subscribers can dial the 5-digit subscriber number directly. However, for calls from other regions in Japan, the full national format is 0-1537-XXXXX, where the leading '0' is the trunk prefix. Internationally, callers must use the country code +81, drop the leading '0', and dial +81-1537-XXXXX. For example, a local Nakashibetsu number might be 0-1537-2-1234, which becomes +81-1537-2-1234 from abroad.
Caller Instructions
- Local callers (within 1537): Dial the subscriber number only (e.g., 2-1234).
- Domestic long-distance callers (outside 1537): Dial 0-1537-XXXXX.
- International callers: Dial your country's exit code, then 81-1537-XXXXX.
Overlays and Numbering Considerations
Currently, there is no overlay code for the 1537 area, meaning the area code is unique to Nakashibetsu. However, as with all Japanese geographic codes, the subscriber number length is fixed at 5 digits for this NDC, making the total national significant number (NSN) 10 digits when including the area code (excluding the trunk prefix). This structure complies with ITU-T E.164 recommendations.
Service and Usage
Numbers with the 1537 code are primarily used for fixed-line telephony, including residential and business lines. As part of Japan's migration to IP-based networks, some services may be delivered over fiber or VoIP, but the geographic nature of the code remains tied to the physical location. Callers should note that while mobile numbers in Japan are non-geographic and begin with 070, 080, or 090, the 1537 code is strictly for fixed-line services.