Area Code 627 – Subulussalam/Sidikalang/Salak
The phone area code for Subulussalam/Sidikalang/Salak is 627 (international format +62627). Browse local exchange codes (NXX) and carrier assignments below.
📍 Geographic Location of Subulussalam/Sidikalang/Salak
Geographic Coverage and Administrative Jurisdiction
The +62 627 country-code prefix is a geographic National Destination Code (NDC) assigned to the western part of North Sumatra province, Indonesia. It serves the municipalities of Subulussalam (Aceh border area), Sidikalang (Dairi Regency), and Salak (Pakpak Bharat Regency). These areas are located in the Bukit Barisan mountain range, near the border with Aceh. The code covers both landline and fixed-wireless services within these administrative regions.
Dialing Formats and Caller Instructions
For domestic callers within Indonesia, the trunk prefix '0' is used before the area code. Thus, to call a fixed line in Sidikalang from Jakarta, you would dial: 0 627 XXX XXXX. For international callers, the country code +62 replaces the trunk prefix, so the format becomes: +62 627 XXX XXXX. Note that the NDC is not separated from the subscriber number; the total length of the national significant number (NSN) is typically 9 to 10 digits, including the leading '0' for domestic calls.
Local Numbering and Overlay Considerations
Subscriber numbers within the 627 area code are generally 6 to 7 digits long. As of the latest ITU-T E.164 national numbering plan updates, there are no overlay codes in this region, meaning 627 is the sole geographic code for these areas. However, due to the proximity to Aceh, callers should be aware that neighboring areas may use different codes (e.g., 6262 for Aceh Tenggara). Always verify the correct code to avoid misdialing.
Service Characteristics and Usage
The 627 prefix is used for traditional PSTN (Public Switched Telephone Network) lines, as well as fixed-wireless access (FWA) services that operate in rural and remote areas. These services are provided by incumbent operators such as Telkom Indonesia and regional fixed-line operators. For VoIP services, the geographic nature of the code means that calls are routed based on the physical location of the line, not the IP address. This is important for businesses that rely on local presence.
Practical Examples
- Calling a landline in Subulussalam from abroad: +62 627 123 456.
- Calling from Jakarta to Salak: 0 627 234 567.
- International callers should omit the leading '0' and use the +62 country code.