Area Code 646 – Idi

Overview of Area Code 646 (Idi, Indonesia)

Area code 646 is a geographic National Destination Code (NDC) assigned to the town of Idi, the administrative capital of East Aceh Regency (Kabupaten Aceh Timur) in the province of Aceh, Sumatra, Indonesia. It serves the local fixed-line PSTN network operated by Telkom Indonesia and other licensed local exchange carriers. The code covers Idi Rayeuk and surrounding sub-districts, including villages along the coastal plain near the Malacca Strait.

Geographic Coverage and Administrative Jurisdiction

The 646 area code is allocated to the eastern part of Aceh province, bordering the districts of Langsa (area code 641) to the east and Bireuen (area code 644) to the west. The region is primarily agricultural, with significant palm oil and rubber plantations. Idi serves as a commercial hub for the surrounding rural areas. The numbering area follows the administrative boundaries of East Aceh Regency, excluding the city of Langsa, which has its own separate code.

Dialing Formats and Procedures

For callers within Indonesia (domestic calls), the trunk prefix 0 must be dialed before the area code. The local subscriber number typically consists of 5 to 7 digits. Therefore, a domestic call to Idi would be dialed as:

• 0 646 XXXX XXX (from most Indonesian fixed and mobile networks)

For international callers, the Indonesian country code +62 is used, and the leading trunk prefix 0 is omitted. The international dialing format is:

• +62 646 XXXX XXX (from any foreign country)

For example, a local number in Idi might be 646 21234. A caller from Jakarta would dial 0 646 21234, while a caller from the United States would dial 011 62 646 21234 (or +62 646 21234 on a mobile phone).

Overlay and Numbering Considerations

As of the latest ITU-T and national numbering plan updates, there is no overlay code for the Idi area. The 646 code is the sole geographic code for this region. However, due to the increasing penetration of mobile and VoIP services, fixed-line usage in rural areas may be limited. Callers should be aware that numbers starting with 646 are geographic and are billed as domestic fixed-line calls when dialed from within Indonesia.

Caller Instructions

• Local callers (within Idi): In some cases, local calls may be dialed using only the subscriber number without the area code, but it is recommended to always include the area code to avoid misrouting.
• Domestic callers (outside Idi): Dial 0 646 followed by the subscriber number.
• International callers: Dial your country's international access prefix (e.g., 00, 011), then 62 646, then the subscriber number. Do not dial the leading '0'.

For emergency services or directory assistance, use the national numbers (e.g., 112 for emergencies) rather than area-code-specific numbers.