Area Code 4580 – Borintsi

Overview of Area Code 4580

Area code 4580 is a geographic National Destination Code (NDC) assigned to the town of Borintsi and its immediate vicinity within the administrative jurisdiction of the Kardzhali Province, in the southern part of Bulgaria. This code is part of the Bulgarian numbering plan regulated by the Communications Regulation Commission (CRC) under the framework of ITU-T E.164. Calls to this destination are routed over the Public Switched Telephone Network (PSTN) and are subject to standard geographic tariffing.

Geographic Coverage and Local Significance

Borintsi is a small settlement located in the Eastern Rhodopes, known for its rural character and proximity to the town of Kardzhali. The area code 4580 serves not only Borintsi but also several neighboring villages that share the same local exchange. These include, but are not limited to, the villages of Gorna Kula, Dolna Kula, and Zvinitsa. The region is characterized by a mix of residential and agricultural activity, with a modest number of fixed-line subscribers. For callers within Bulgaria, the local dialing format is 04580 XXX XXX (or 04580 XXXXX depending on the subscriber number length). When dialing from abroad, the international format is +359 4580 XXX XXX.

Dialing Instructions

• Local calls (within the same area code): Subscribers within Borintsi and its surrounding area can dial the subscriber number directly without the area code, provided that seven-digit local numbers are in use. However, due to the small size of the exchange, it is common to dial the full number including the area code even for local calls, as per the operator's guidelines.
• National calls (from other parts of Bulgaria): Dial 0 4580 XXX XXX (the leading 0 is the trunk prefix).
• International calls (from abroad): Dial your country's exit code (e.g., 00 from most European countries, 011 from the US/Canada), followed by 359 4580 XXX XXX.

Overlay and Numbering Considerations

As of the latest CRC updates, there is no overlay code for the 4580 area. The code is exclusively geographic, meaning that the tariff is based on the location of the called party. Number portability is available for fixed-line subscribers, allowing them to retain their number when changing operators within the same geographic area. However, porting a number outside the 4580 area is not permitted, as geographic numbers are tied to their respective rate centers.

Caller Guidance

For callers from abroad, it is essential to omit the leading trunk prefix '0' when dialing the Bulgarian number. For example, to reach a subscriber in Borintsi with the local number 123456, you would dial +359 4580 123456. For callers within Bulgaria, always include the trunk prefix '0' when dialing from a different area code. For emergency services, always dial 112, which is the universal European emergency number.