Area Code 4582 – Gradets, Sliven

Geographic Overview

The +359 4582 numbering block is a geographic National Destination Code (NDC) assigned to the town of Gradets, situated within the Sliven Province of central Bulgaria. This code is part of Bulgaria's national numbering plan, which adheres to the ITU-T E.164 recommendation. The administrative center for this region is the city of Sliven, located approximately 25 kilometers to the north. Gradets is a small rural locality, and its telephone services are provided via the fixed PSTN network, with copper and fiber infrastructure operated by the incumbent carrier and alternative local operators.

Dialing Formats

For callers within Bulgaria, the national trunk prefix '0' is used before the area code, followed by the subscriber number. The complete national format is: 0 4582 XXX XX (where X represents the local subscriber digits). For example, a local number might be dialed as 04582 12345.

For international callers, the country code +359 is used, and the leading '0' of the national prefix is omitted. The international format is: +359 4582 XXX XX. Thus, the same number would be dialed as +359 4582 12345 from abroad.

Caller Instructions

• Local callers (within Gradets): In many fixed-line networks, local calls can be made using only the subscriber number (e.g., 12345), but for clarity and to avoid misdialing, it is recommended to use the full national format, especially when calling from mobile phones.
• National callers (outside Gradets): Dial 04582 followed by the subscriber number.
• International callers: Dial your country's international access code (e.g., 00 from most European countries, 011 from the US/Canada), then 359 (country code), then 4582 (area code without the leading zero), and then the subscriber number.

Overlay and Numbering Considerations

As of the latest ITU-T operational bulletins, there is no overlay code for the Gradets area. The 4582 area code is exclusively assigned to this geographic region. Subscriber numbers within this code typically consist of 5 to 6 digits after the area code, depending on the specific allocation. The total length of a national significant number (NSN) for Bulgaria is 8 to 9 digits, and for Gradets, it is typically 8 digits (including the area code).

When dialing from abroad, it is essential to omit the leading '0' of the area code. For example, a call from the United States to a Gradets number would be dialed as 011 359 4582 12345.

As with all fixed-line services in Bulgaria, calls to +359 4582 numbers are charged according to the tariff of the caller's operator, and calls from mobile networks may be subject to higher rates. Since the liberalization of the Bulgarian telecom market, customers in Gradets can choose among several fixed-line operators, but the geographic number remains tied to the location.