Area Code 434 – Bitlis

Overview of Area Code +90 434

Area code 434 is a geographic National Destination Code (NDC) within the Turkish numbering plan, assigned to the province of Bitlis in eastern Anatolia. It is used for fixed-line (PSTN) services and is administered under the regulatory oversight of the Information and Communication Technologies Authority (BTK). The code covers the administrative boundaries of Bitlis Province, including its central district and dependent townships.

Geographic Coverage and Administrative Jurisdiction

The +90 434 area code serves the entire province of Bitlis, which includes the central municipality of Bitlis and the districts of Ahlat, Adilcevaz, Hizan, Mutki, and Tatvan. This region is situated near Lake Van and is known for its historical and cultural significance. The code is geographically fixed, meaning that the call routing is based on the physical location of the subscriber's exchange, not on the service provider or technology (PSTN, VoIP, or ISDN).

Dialing Formats and Caller Instructions

For domestic callers within Turkey, the dialing format is 0 434 XXX XX XX, where the leading 0 is the trunk prefix used to access the national PSTN. The subscriber number is seven digits long, making the total national significant number (NSN) length 10 digits when including the area code. For international callers, the format is +90 434 XXX XX XX, replacing the trunk prefix with the country code +90. When calling from a mobile phone within Turkey, the trunk prefix can be omitted, and the number can be dialed as 434 XXX XX XX.

Example: To call a fixed line in Tatvan from Istanbul, dial 0 434 8XX XX XX. From abroad, dial +90 434 8XX XX XX.

Overlay and Numbering Considerations

As of the latest BTK updates, there is no overlay code for Bitlis; the 434 code is the sole geographic code for the province. However, due to number portability, subscribers may retain their 434 numbers even if they switch to a different fixed-line operator. It is important to note that while the code is geographic, the actual service may be delivered over IP networks, but the number remains associated with the Bitlis region for regulatory and emergency services (e.g., 112) purposes.

Practical Usage for Local and Foreign Callers

Local callers within Bitlis can often dial the seven-digit subscriber number directly without the area code, depending on their operator's local dialing rules. Foreign callers should always include the country code and area code, omitting the leading zero. Be mindful of time differences (Turkey is UTC+3) when placing calls. For business or personal use, ensure that you have the correct seven-digit subscriber number, as numbers are not portable outside the geographic area code.