Area Code 464 – Ampana

Overview of Area Code 464 (Ampana, Indonesia)

Area code 464 is a geographic National Destination Code (NDC) assigned to the fixed-line telephone network serving Ampana, the capital of Tojo Una-Una Regency in Central Sulawesi, Indonesia. This code follows the ITU-T E.164 international numbering standard and is used for routing calls to landline subscribers within this specific administrative region. Ampana is a coastal town located on the eastern shore of Tojo Una-Una, and its telecommunications infrastructure is managed by Indonesian fixed-line operators, primarily Telkom Indonesia.

Geographic Coverage and Jurisdiction

The 464 area code covers Ampana and its surrounding administrative districts within Tojo Una-Una Regency. This includes the sub-districts of Ampana Kota, Ampana Tete, and adjacent rural areas that rely on the same local exchange. The code is geographically significant because it distinguishes Ampana's fixed-line subscribers from those in other Central Sulawesi regions, such as Palu (0451) or Luwuk (0461). Callers within Indonesia must dial the area code when calling from outside the local calling area, even if using a mobile phone.

Dialing Formats and Caller Instructions

For local callers within Ampana, the standard national dialing format is 0464-XXXXXXX, where the leading '0' is the trunk prefix, '464' is the area code, and the subscriber number typically consists of 5 to 7 digits. When calling from another Indonesian city or from a mobile phone, the same format applies: 0464-XXXXXXX. International callers must replace the trunk prefix '0' with Indonesia's country code +62, resulting in the format +62 464-XXXXXXX (or +62464XXXXXXX when dialed without spaces). For example, a local number 12345 would be dialed as 0464-12345 domestically and +62 464-12345 from abroad. Note that the total number of digits after the country code varies, so callers should verify the complete subscriber number with the recipient.

Overlay and Numbering Considerations

As of the latest ITU-T national numbering plan updates, area code 464 does not have an overlay code; it remains the sole geographic code for Ampana. However, the rapid expansion of mobile and VoIP services has reduced the reliance on fixed lines, but the code remains active for businesses, government offices, and residential landlines. Number portability is available in Indonesia, allowing subscribers to retain their fixed-line numbers when switching operators within the same geographic area, but the geographic significance of the code is preserved.

Practical Usage for Businesses and Residents

Businesses operating in Ampana should prominently display their numbers in international format on websites and marketing materials to facilitate global communication. For call centers or remote teams, it is essential to note that calls to 0464 numbers are routed via the PSTN and may incur higher tariffs when dialed from mobile networks. Travelers and expatriates should store numbers with the +62 country code to ensure connectivity when roaming. Understanding the correct dialing format helps avoid call failures and ensures seamless communication with this Central Sulawesi region.