Area Code 4723 – Boyanovo, Yambol

Overview of Area Code 4723

Area code 4723 is a geographic National Destination Code (NDC) within the Bulgarian telephone numbering plan, assigned to the town of Boyanovo and its surrounding localities in the Yambol Province. It is part of the administrative region of Yambol, located in southeastern Bulgaria. The code is used for fixed-line (PSTN) services and is allocated by the Communications Regulation Commission (CRC) of Bulgaria.

Geographic Coverage and Administrative Jurisdiction

The 4723 area code covers the settlement of Boyanovo, which is situated in the Bolyarovo Municipality, Yambol Province. This area is predominantly rural, with agriculture and small-scale industry forming the economic base. The code serves the town itself and may extend to nearby villages within the same municipal boundary, depending on the local telecommunication infrastructure.

Dialing Formats and Caller Instructions

For callers within Bulgaria, the national trunk prefix 0 must be dialed before the area code. Therefore, a local number in Boyanovo is dialed as 0 4723 XXX XXX (where X represents the subscriber number digits). For example, a typical local number might be 0 4723 45 67 89.

For international callers, the Bulgarian country code +359 is used, followed by the area code without the leading zero. Thus, the same number would be dialed as +359 4723 45 67 89.

When dialing within the same area code, it is often possible to omit the area code and dial only the subscriber number, depending on the local network configuration. However, for clarity and to avoid misdialing, it is recommended to use the full national format.

Overlay and Numbering Considerations

As of the latest updates, there are no overlay codes for the 4723 area. The numbering plan in Bulgaria is closed, meaning that the length of the national significant number (NSN) is fixed at 8 digits for geographic numbers (excluding the trunk prefix 0). For 4723, the subscriber number length is 6 digits, making the total NSN 8 digits (4723 + 6 digits).

Geographic numbers in Bulgaria are not portable to other geographic areas, but they can be ported to VoIP providers that support geographic number portability, subject to regulatory rules.

Caller Instructions for Local and Foreign Callers

• Local callers (within Bulgaria): Dial 0 4723 XXX XXX from any fixed or mobile line.
• International callers: Dial your country's international access code (e.g., 00 or +), then 359 4723 XXX XXX.
• Callers from mobile phones in Bulgaria: The same national format applies; the trunk prefix 0 is used.

When calling from abroad, ensure you omit the leading '0' of the area code. For example, to call a number in Boyanovo, you would dial +359 4723 45 67 89.

Service and Usage

Numbers under 4723 are primarily used for residential and business fixed-line services. They are not designated for mobile services, which use separate non-geographic prefixes such as 87, 88, 89, and 98. As with all Bulgarian geographic numbers, calls to 4723 are charged according to the caller's tariff plan, and for international callers, standard international rates apply.