Türkiye ☎️ Landline / Geographic

Area Code 380 – Duzce

The phone area code for Duzce is 380 (international format +90380). Browse local exchange codes (NXX) and carrier assignments below.

Current Local Time

03:41:07

UTC • UTC +00:00

Full Dialing Format

+90380

Population 353,988

👥

Admin Region Bitlis

🗺️

Elevation 1665m

🏔️

GPS Coordinates 38.2605, 42.3231

📍

📍 Geographic Location of Duzce

Overview of Area Code +90 380

Area code 380 is a geographic National Destination Code (NDC) within the Turkish numbering plan, administered under the ITU-T E.164 standard. It serves the province of Düzce, located in the Western Black Sea region of Türkiye. The code covers the entire province, including its administrative center, Düzce (also spelled Düzce), and all surrounding districts and rural localities.

Geographic Coverage and Administrative Jurisdiction

The 380 area code is assigned exclusively to the province of Düzce, which was established as a separate province in 1999 after a major earthquake. Prior to that, the region was part of Bolu province and used the 374 area code. Today, 380 is used for all fixed-line (PSTN) services within Düzce's borders. Key districts served include Akçakoca, a popular Black Sea coastal town; Kaynaşlı, an industrial zone; Gölyaka, Cumayeri, Çilimli, and Yığılca. The code is also used for some VoIP and fiber-optic based fixed services that are geographically tied to the province.

Dialing Formats and Caller Instructions

When calling a Düzce fixed-line number from within Türkiye, subscribers must dial the trunk prefix 0, followed by the area code 380, and then the 7-digit subscriber number. The national format is: 0 380 XXX XX XX. For example, a local number might be 0 380 524 12 34.

For international callers, the Turkish country code +90 replaces the trunk prefix. The international format is: +90 380 XXX XX XX. So, the same number would be dialed as +90 380 524 12 34 from abroad. When dialing internationally, the leading '0' is omitted.

Within the same area code, local calls can often be made using only the 7-digit subscriber number, but for clarity and due to mobile number portability, it is recommended to always use the full national or international format.

Overlays and Numbering Considerations

Currently, there is no overlay code for Düzce; 380 is the sole geographic area code for the province. However, due to the increasing demand for fixed-line services, the Turkish regulator (BTK) may introduce additional digits or overlay codes in the future. Subscribers should be aware that number portability allows users to retain their 380 numbers when switching between fixed-line operators, but the geographic significance remains tied to the Düzce region.

Practical Tips for Callers

When calling from a mobile phone within Türkiye, you can dial the number in the national format (0 380 XXX XX XX) or international format (+90 380 XXX XX XX). Mobile phones do not require the trunk prefix, but it is safe to use either. For international callers, always use the plus sign (+) followed by the country code to ensure proper routing from any country.

❓ Frequently Asked Questions

Which city or region does the area code 380 belong to in Turkey?

Area code 380 is assigned to the province of Düzce, located in the Western Black Sea region of Turkey. It covers the city center and all districts, including Akçakoca, Kaynaşlı, Gölyaka, Cumayeri, Çilimli, and Yığılca.

How do I call a Düzce number from abroad?

To call a Düzce number from abroad, dial the international access code (e.g., 00 from many countries), then Turkey's country code +90, then the area code 380, followed by the 7-digit local number. For example, +90 380 524 12 34.

Is 380 a mobile or landline prefix?

380 is a geographic area code used for fixed-line (landline) services in Düzce province. Mobile numbers in Turkey use non-geographic prefixes starting with 5, such as 530, 531, 532, etc., and are not tied to a specific region.

Do I need to dial 0 before 380 when calling from a Turkish mobile?

Yes, when calling a fixed line in Düzce from any phone within Turkey, you should dial 0 (trunk prefix) followed by 380 and the 7-digit number. Alternatively, you can dial +90 380 and the number, which works from both mobile and fixed lines.

Can I keep my 380 number if I move to another city?

Number portability in Turkey allows you to keep your fixed-line number when changing operators, but the geographic area code is tied to the physical location of the line. If you move outside the Düzce area, you will likely need to obtain a new number with the local area code.