Area Code 323 – Sampang

Overview of Area Code 323

Area code 323 is a geographic National Destination Code (NDC) assigned to the Sampang Regency, located on the island of Madura in East Java Province, Indonesia. Under the Indonesian national numbering plan, which follows ITU-T E.164 recommendations, the country calling code for Indonesia is +62. When dialing a fixed-line number in Sampang from abroad, the international format is +62 323 XXX XXXX, where the leading '0' of the domestic trunk prefix is omitted. Domestically, callers within Indonesia must dial 0 323 XXX XXXX to reach a Sampang landline.

Geographic Coverage and Administrative Jurisdiction

The 323 code serves the entire administrative area of Sampang Regency (Kabupaten Sampang), which is one of the four regencies on Madura Island. The regency's capital is the town of Sampang, located on the southern coast of Madura. The code covers all districts (kecamatan) within the regency, including Sampang, Torjun, Pangarengan, Sreseh, and others. It is important to note that neighboring regencies on Madura, such as Bangkalan (031), Pamekasan (0324), and Sumenep (0328), have different area codes, reflecting the hierarchical structure of Indonesia's geographic numbering plan.

Dialing Procedures and Number Formats

For local callers within the Sampang area, the full national number (including the trunk prefix '0' and area code) is typically required, as Indonesia does not use a separate local dialing format for calls within the same NDC. Thus, even for calls between two landlines in Sampang, the caller must dial 0 323 XXX XXXX. For international callers, the process is: dial the international access code (e.g., 011 from the US, 00 from most countries), then Indonesia's country code 62, followed by the area code without the leading '0', and the subscriber number. For example, to call a Sampang number 1234567, an international caller would dial +62 323 1234567. The total number of digits after the country code is typically 9 to 10, including the NDC, resulting in a complete E.164 number of up to 13 digits.

Overlay and Numbering Considerations

As of the latest ITU-T national numbering plan updates, there is no overlay code for the 323 area. The code remains exclusively assigned to Sampang, and no 10-digit dialing is required. However, with the ongoing evolution of Indonesia's telecommunications sector, including the migration towards IP-based networks, it is advisable for businesses and residents to consistently use the full national format (0 323 XXX XXXX) to ensure compatibility across all networks. For callers using VoIP or mobile phones, the same dialing rules apply, but it is essential to verify that the destination number is indeed a fixed-line service, as mobile numbers in Indonesia always begin with '08' and are non-geographic.

Practical Information for Callers

When placing calls to Sampang, be mindful of time zone differences (Indonesia Western Time, UTC+7). For emergency services or directory assistance, local numbers may differ; always consult local resources. For businesses with a presence in Sampang, having a local number with area code 323 can enhance trust and accessibility for regional customers. For those traveling to Madura, understanding the dialing format ensures seamless communication with local contacts.