Area Code 286 – Banjarnegara/Wonosobo

Overview of Area Code 286

Area code 286 is a geographic National Destination Code (NDC) within the Indonesian numbering plan, assigned to the Banjarnegara and Wonosobo regions in Central Java. These regencies are located in the Dieng Plateau area, known for their highland geography and cooler climate. The code is used for fixed-line (PSTN) services, including traditional copper lines and some fixed wireless or VoIP-based local services.

Geographic Coverage and Administrative Jurisdiction

The 286 area code covers two administrative regencies (kabupaten): Banjarnegara and Wonosobo. Both are part of Central Java Province. Key towns and districts served include Banjarnegara city, Wonosobo city, and surrounding sub-districts such as Bawang, Purwanegara, Mandiraja, and Kertek. The code is also used in the Dieng Plateau tourist area, which straddles both regencies.

Dialing Formats

• Local dialing (within the same area code): Subscriber numbers are typically 5 to 7 digits long. To call a local number, simply dial the subscriber number directly, without the area code. For example, if the local number is 123456, dial 123456.
• National long-distance dialing (from other parts of Indonesia): Dial the trunk prefix 0, followed by the area code 286, and then the subscriber number. For example, to call a number in Banjarnegara from Jakarta, dial 0 286 123456.
• International dialing (from outside Indonesia): Dial your country's international access code (e.g., 00 from many countries, 011 from the US/Canada), followed by Indonesia's country code 62, then the area code without the leading 0, and finally the subscriber number. For example, from the US, dial 011 62 286 123456.

Overlay and Numbering Considerations

As of the latest ITU-T E.164 national numbering plan updates, there is no overlay code for 286. The area code is unique to the Banjarnegara/Wonosobo region. However, due to the increasing demand for fixed-line services, some numbers may have been migrated to VoIP or fixed wireless access (FWA) platforms, but the geographic significance of the code remains. Callers should always use the full national number (including the leading 0) when dialing from outside the local area.

Caller Instructions

For local callers: If you are physically within the 286 area code region, you can dial the subscriber number directly for local calls. For calls to other area codes, you must use the national format with the leading 0.

For international callers: Always omit the leading '0' of the area code when dialing from abroad. Ensure you have the correct international access code for your country. For example, from the UK, you would dial 00 62 286 123456.

This area code is essential for businesses and residents in Banjarnegara and Wonosobo to maintain connectivity with the rest of Indonesia and the world. Proper dialing ensures efficient call routing and avoids misdialed calls.