Area Code 2857 – Mooka, Tochigi
The phone area code for Mooka, Tochigi is 2857 (international format +812857). Browse local exchange codes (NXX) and carrier assignments below.
📍 Geographic Location of Mooka, Tochigi
Geographic Overview
The area code 02857 is a geographic National Destination Code (NDC) assigned to the city of Mooka (真岡市) in Tochigi Prefecture, Japan. This code is part of the Japanese telephone numbering plan, which follows ITU-T E.164 recommendations. When dialing internationally, the country code +81 is used, and the leading '0' of the NDC is dropped. Thus, the international format for a Mooka number is +81 2857 XXXX (where XXXX is the subscriber number).
Mooka is located in the southern part of Tochigi Prefecture, approximately 90 kilometers north of Tokyo. The city is known for its historical sites, such as the Mooka Castle ruins, and its thriving manufacturing sector. The area code 02857 covers the central and surrounding areas of Mooka, including the former towns of Ninomiya and Mashiko (partially). Mashiko is famous for its pottery (Mashiko-yaki), attracting many visitors.
Dialing Instructions
For local callers within the Mooka area, the full 10-digit number (02857-XXXX) is dialed. For callers from other parts of Japan, the same 10-digit number is used. When calling from abroad, the international prefix (e.g., 011 from the US, 00 from most countries) is followed by Japan's country code 81, then the area code without the leading zero (2857), and the subscriber number. For example, to call a Mooka number 1234 from the United States, you would dial: 011 81 2857 1234.
Numbering and Overlay Considerations
Japan's geographic area codes are generally not subject to overlays, but some regions have introduced additional codes due to number exhaustion. However, as of the latest data, Mooka retains the single area code 02857. Subscriber numbers in this area typically have four digits, making the total national significant number (NSN) length 10 digits, including the leading '0'. It is important to note that the '0' is a trunk prefix and is not part of the country code.
For businesses and residents in Mooka, the area code is an essential part of their identity, and it is used for both PSTN and VoIP services. When porting numbers, the geographic significance is maintained, and the number remains associated with the Mooka area even if the service provider changes.