Area Code 1544 – Kushiro, Hokkaido

Overview of Area Code 1544

Area code 1544 is a geographic National Destination Code (NDC) assigned to the Kushiro region in Hokkaido, Japan. It serves the city of Kushiro and its surrounding areas, including the towns of Shiranuka, Tsurui, and part of the Kushiro Subprefecture. The code is part of the Japanese numbering plan, which follows ITU-T E.164 standards. When dialing from abroad, the full international format is +81 1544 followed by the local subscriber number.

Geographic Coverage and Administrative Jurisdiction

The 1544 area code covers the eastern part of Hokkaido, with Kushiro being the largest city in the region. Kushiro is known for its port, paper industry, and the Kushiro Wetlands, a designated Ramsar site. The administrative jurisdiction includes the Kushiro Subprefecture, which encompasses several municipalities. Local numbers within this area code typically have a length of 6 digits, making the total number length 10 digits when including the area code (excluding the country code). For example, a local number might be 1544-XX-XXXX.

Dialing Formats

• Local dialing (within Kushiro): When calling within the same area code, you can dial the 6-digit subscriber number directly without the area code. For instance, if the subscriber number is 12-3456, you would dial 12-3456.
• National dialing (from other parts of Japan): Dial the area code (including the leading 0) followed by the subscriber number. For example, to call a number in Kushiro from Tokyo, you would dial 01544-12-3456.
• International dialing (from outside Japan): Dial the international access prefix (e.g., 011 from the US, 00 from most countries), then Japan's country code 81, then the area code without the leading 0, and then the subscriber number. For example, from the US, you would dial 011 81 1544 12-3456.

Overlay Considerations

As of the latest numbering plan updates, there is no overlay code for the Kushiro area. The 1544 code is the sole geographic code for this region. However, users should be aware that in some parts of Japan, overlay codes have been introduced to address number exhaustion, but this is not the case for Kushiro at present.

Caller Instructions

For local callers: If you are within the Kushiro area and calling another local number, omit the area code. If you are calling from a mobile phone, you may need to include the area code even for local calls, as mobile networks route based on the full national number. Always check with your service provider for specific dialing instructions.

For foreign callers: Ensure you replace the leading '0' of the area code with the country code '81' when dialing internationally. For example, the national number 01544-12-3456 becomes +81 1544 12-3456 internationally. Note that the plus sign (+) represents the international access code, which varies by country.