Area Code 545 – Melak

Overview of Area Code 545

Area code 545 is a geographic National Destination Code (NDC) assigned to the Melak region in Indonesia, part of the West Kutai Regency in East Kalimantan province, on the island of Borneo. This code is used for fixed-line telephone services within the local PSTN (Public Switched Telephone Network). The region encompasses the administrative district of Melak and its surrounding areas, including the towns of Barong Tongkok, Sekolaq Darat, and other nearby settlements. The code is allocated under the Indonesian numbering plan, which follows ITU-T E.164 recommendations.

Dialing Formats

To call a fixed-line number in the Melak area, the dialing format depends on the caller's location:

• Within Indonesia (domestic call): Dial 0545 followed by the subscriber number (typically 5 to 7 digits). For example, a local number might be 0545 12345.
• From outside Indonesia (international call): Dial the international access prefix (e.g., 00 or +), then Indonesia's country code 62, then the area code without the leading 0, and finally the subscriber number. For instance, to call 0545 12345 from abroad, you would dial +62 545 12345.

When dialing locally within the same area code, callers may often omit the area code and dial only the subscriber number, depending on the local network configuration. However, for calls from other regions in Indonesia, the full trunk prefix 0 and area code are required.

Geographic Coverage and Administration

Melak serves as a key administrative and economic hub in the West Kutai Regency. The area is known for its coal mining industry and as a gateway to the interior of East Kalimantan. The 0545 area code covers a significant geographic area, including several sub-districts (kecamatan) within the regency. The numbering allocation is managed by the Indonesian Telecommunication Regulatory Authority (BRTI) and assigned to local fixed-line operators, primarily PT Telkom Indonesia (Telkom) and other regional providers.

Caller Instructions

For callers within Indonesia, always use the trunk prefix 0 when dialing from outside the local area. For example, from Jakarta, you would dial 0545 12345. For international callers, it is essential to replace the leading 0 with the country code 62 and drop the 0 entirely. Thus, a number like 0545 67890 becomes +62 545 67890. This ensures proper routing through international gateways.

As with many geographic codes in Indonesia, overlay plans may be introduced to accommodate growing demand, but as of now, 0545 remains the sole area code for this region. Callers should verify the subscriber number length, as it may vary depending on the operator and the specific exchange.