Area Code 353 – Bojonegoro

Overview of Area Code 353 (Bojonegoro)

Area code 353 is a geographic National Destination Code (NDC) within the Indonesian numbering plan, assigned to the Bojonegoro region in East Java (Jawa Timur). This code covers the administrative city of Bojonegoro and its surrounding regency, including districts such as Balen, Kanor, Kapas, and Sumberrejo. As a geographic code, it is tied to a specific PSTN (Public Switched Telephone Network) exchange area, meaning that calls to numbers with this prefix are routed to physical lines within that locality.

When dialing locally within Indonesia, subscribers use the full 10-digit national significant number (NSN), which includes the area code and the subscriber number. For example, a fixed-line number in Bojonegoro might be 0353 123456. Note that the leading '0' is a trunk prefix used for domestic calls; it is not part of the international dialing sequence.

For international callers, the correct format is +62 353 123456 (or +62-353-XXXXXXX depending on the number length). The country code for Indonesia is +62, and the area code is 353 (without the leading zero). When dialing from abroad, you must replace the trunk prefix '0' with the international access code (e.g., '00' or '+') followed by the country code and the area code.

Dialing Instructions

• Domestic call (within Indonesia): Dial 0353 followed by the subscriber number. Example: 0353 123456.
• International call (to Bojonegoro): Dial your country's exit code, then 62, then 353, then the subscriber number. Example: +62 353 123456.
• Local calls within Bojonegoro: In many cases, you can omit the area code if dialing from another number within the same exchange, but for clarity and to avoid misdialing, it is recommended to always include the full national number.

Overlay and Numbering Considerations

Currently, there is no overlay code for Bojonegoro; the 353 code is unique to this region. However, as Indonesia's numbering plan evolves, it is advisable to always store numbers in international format (+62 353...) to ensure compatibility with mobile and VoIP services, especially if number portability is applied in the future.

Geographic area codes like 353 are typically used for fixed-line services, but with the rise of VoIP and fixed-wireless access, some providers may route calls via IP networks. Nevertheless, the geographic significance remains for emergency services and location-based routing.