Area Code 765 – Dumai/Duri/Bagan Batu/Ujung Tanjung

Overview of Area Code 765 (Indonesia)

Area code 765 is a geographic National Destination Code (NDC) assigned to the Riau region of Sumatra, Indonesia. It covers the eastern coastal and inland areas of Riau Province, specifically serving the cities and districts of Dumai, Duri, Bagan Batu, and Ujung Tanjung. This code is part of the Indonesian public switched telephone network (PSTN) and is used for fixed-line services, including residential, business, and government lines.

Geographic Coverage and Major Localities

The 765 area code encompasses the following key administrative areas:

• Dumai: A major oil and gas hub on the coast of the Strait of Malacca, and the second-largest city in Riau Province.
• Duri: A significant oil field town located inland, known for its petroleum industry.
• Bagan Batu: A sub-district in Rokan Hilir Regency, serving as an administrative and commercial center.
• Ujung Tanjung: A coastal area in Rokan Hilir, important for fishing and maritime activities.

These areas are served by incumbent local exchange carriers and other licensed operators. As with most Indonesian geographic codes, the 765 area code is assigned to fixed-line services, and numbers are typically 7 to 8 digits long after the trunk prefix.

Dialing Formats

Understanding the correct dialing procedure is essential for both domestic and international callers.

• Local calls (within the 765 area): If you are calling a number within the same area code, you can usually dial the subscriber number directly without the area code. For example, if the number is 765 123456, you would dial 123456.
• Domestic long-distance calls (from other Indonesian area codes): Dial the trunk prefix 0, followed by the area code 765, and then the subscriber number. For instance, to call a number in Dumai from Jakarta, you would dial: 0 765 123456.
• International calls (from outside Indonesia): Dial the international access prefix (e.g., 00 from most countries), then Indonesia's country code +62, followed by the area code 765 (without the leading 0), and then the subscriber number. For example, from the United States, you would dial: 011 62 765 123456 or +62 765 123456.

Numbering Plan and Overlay Considerations

As of the latest ITU-T E.164 national numbering plan for Indonesia, the 765 area code does not have an overlay code. The subscriber numbers within this area are typically 7 digits long, but may vary depending on the operator and service type. It is important to note that mobile numbers in Indonesia are not prefixed with geographic area codes; they have their own mobile prefixes (e.g., 0811, 0812, etc.) and are dialed as +62 8xx xxxx xxxx.

Caller Instructions

For callers within Indonesia, always include the trunk prefix 0 when dialing from outside the 765 area. For international callers, remember to drop the leading 0 and use the country code +62. If you are unsure about the exact number length, it is advisable to confirm with the party you are calling, as some numbers may be shorter or longer.

In summary, area code 765 is a vital part of Indonesia's telecommunications infrastructure, connecting the dynamic economic region of Riau. By following the correct dialing procedures, you can easily reach any fixed-line subscriber in Dumai, Duri, Bagan Batu, or Ujung Tanjung.