Which city does the +90 372 area code cover?

The +90 372 area code covers the province of Zonguldak in Türkiye, including its central district and surrounding towns like Kozlu, Kilimli, and Çaycuma.

How do I call a Zonguldak number from the United States?

Dial the US exit code 011, then Türkiye's country code 90, then the area code 372, and the 7-digit local number. For example: 011 90 372 XXX XX XX.

Do I need to dial the area code for local calls within Zonguldak?

Yes, in Türkiye, all fixed-line calls require the area code, even for local calls. You must dial 0 372 followed by the 7-digit number.

What is the number length for Zonguldak landlines?

Zonguldak landline numbers consist of the area code (372) plus a 7-digit subscriber number, making a total of 10 digits when dialed nationally (0 372 XXX XX XX) or internationally (+90 372 XXX XX XX).

Area Code 372 (Türkiye) - Prefix Details & Exchanges

Q: Are mobile numbers in Zonguldak also under +90 372?

No, mobile numbers in Türkiye use separate non-geographic prefixes (e.g., 530, 532, 541) and are not tied to geographic area codes like 372.

Overview of Area Code +90 372

Area code 372 is a geographic National Destination Code (NDC) within the Turkish numbering plan, assigned to the province of Zonguldak in the Western Black Sea region of Türkiye. The code serves the administrative districts of Zonguldak, including the central municipality and its connected towns, such as Kozlu, Kilimli, and Çaycuma. The region is known for its coal mining heritage and Black Sea coastline.

Geographic Coverage and Administration

The +90 372 code is allocated by the Information and Communication Technologies Authority (BTK) for fixed-line PSTN services within the Zonguldak province. It encompasses both residential and business lines, including public telephony and DSL infrastructure. The coverage area does not extend to neighboring provinces; for example, Bartın uses +90 378 and Karabük uses +90 370.

Dialing Formats

When calling a Zonguldak fixed-line number from within Türkiye, you must dial the trunk prefix 0, followed by the area code 372 and the 7-digit subscriber number. The national format is: 0 372 XXX XX XX. For international callers, the format is +90 372 XXX XX XX (or 0090 372 XXX XX XX from many countries). The total number length after the country code is 10 digits (3-digit area code + 7-digit local number).

Caller Instructions

Local callers within Zonguldak: For calls within the same area code, you may need to dial the full 10-digit number (including area code) depending on your operator's requirements. In Türkiye, all fixed-line calls require the area code, even for local calls, so dial 0 372 XXX XX XX.
Callers from other Turkish provinces: Dial 0 372 XXX XX XX.
International callers: Dial your country's exit code (e.g., 00 from most countries, 011 from the US/Canada), then 90 372 XXX XX XX.

Numbering and Overlay Considerations

Currently, there is no overlay code for Zonguldak; the 372 code is the sole geographic code for the province. All fixed-line numbers in the area are 7 digits long, and the numbering capacity is sufficient for the region's population. Mobile numbers in Türkiye use separate non-geographic prefixes (e.g., 530, 532, 541) and are not affected by this area code.

Practical Usage

Businesses and residents in Zonguldak use these numbers for traditional PSTN services, including fax and internet via ADSL. When dialing from abroad, ensure you omit the leading '0' of the national trunk prefix. For example, a number listed as 0 372 456 78 90 should be dialed as +90 372 456 78 90 internationally.

Area Code 372 – Zongdulak

📍 Geographic Location of Zongdulak