Area Code 2992 – Ishioka, Ibaraki
The phone area code for Ishioka, Ibaraki is 2992 (international format +812992). Browse local exchange codes (NXX) and carrier assignments below.
📍 Geographic Location of Ishioka, Ibaraki
Geographic Overview
The area code 2992 is a geographic National Destination Code (NDC) assigned to the city of Ishioka, located in Ibaraki Prefecture, Japan. Ishioka is situated in the southern part of Ibaraki, approximately 80 kilometers northeast of Tokyo. The code covers the central urban area of Ishioka and its surrounding administrative districts, including parts of the former Yasato and Chiyoda towns that were merged into the city. This numbering area is part of the Japanese PSTN (Public Switched Telephone Network) and is administered under the ITU-T E.164 country code +81.
Dialing Formats
For callers within Japan, the number is dialed as 02992-XXXXX, where the leading '0' is the trunk prefix. The total subscriber number length after the area code is five digits, making the complete domestic number 10 digits (including the trunk prefix). For international callers, the number must be dialed as +81 2992-XXXXX, omitting the leading '0'. For example, a local number such as 12345 would be dialed as 02992-12345 domestically and +81 2992-12345 from abroad.
Geographic Allocation and Overlays
This area code is strictly geographic, meaning it is tied to the physical location of the telephone line. However, with the proliferation of VoIP and Number Portability, subscribers may retain their 02992 numbers even if they move outside the traditional service area, though this is less common for fixed-line services. As of the latest numbering plan updates, there is no overlay code for this region; the 02992 code is unique to the Ishioka area. Callers should be aware that calls to this code are typically charged at domestic rates when dialed from other parts of Japan.
Caller Instructions
For local callers within Ishioka, it is possible to dial the five-digit subscriber number directly without the area code in some cases, but for reliability, it is recommended to always include the full 02992 prefix. For callers from other regions in Japan, dial 02992-XXXXX. For international callers, replace the leading '0' with the country code +81, resulting in +81 2992-XXXXX. Ensure you drop the '0' when dialing from overseas.