Area Code 4525 – Omarchevo, Sliven
The phone area code for Omarchevo, Sliven is 4525 (international format +3594525). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 4525
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Omarchevo, Sliven
Geographic Overview
The +359 4525 prefix is a geographic National Destination Code (NDC) assigned to the Omarchevo area within the Sliven Province of Bulgaria. Omarchevo is a small village located in the central part of the country, approximately 10 kilometers south of the city of Sliven, which serves as the administrative and economic hub of the region. The code is part of the Bulgarian numbering plan administered by the Communications Regulation Commission (CRC) under ITU-T E.164 standards.
Dialing Formats
When calling a landline in Omarchevo from within Bulgaria, subscribers must dial the trunk prefix '0' followed by the area code and the local subscriber number. The national format is: 0 4525 XXX XX. For example, a local number might be dialed as 04525 12345 from anywhere in Bulgaria.
For international callers, the country code +359 replaces the leading '0', and the number is dialed as +359 4525 XXX XX. Thus, the same example would be dialed as +359 4525 12345 from abroad. It is important to note that the area code 4525 is a geographic code, meaning it is tied to a specific physical location and is used for fixed-line PSTN services.
Geographic Coverage and Administration
The 4525 area code serves the administrative territory of Omarchevo and its immediate surroundings. The village is part of the Sliven Municipality, and the code is used by local fixed-line operators, primarily the incumbent provider (formerly BTC, now A1 Bulgaria) as well as alternative carriers offering local loop services. The numbering area is relatively small, reflecting the low population density of the region.
Caller Instructions
Local callers within Bulgaria: Dial the full national number including the trunk prefix '0'. For example, to call a subscriber in Omarchevo from Sofia, you would dial 04525 12345.
International callers: Dial your country's international access code (e.g., 00 from most European countries, 011 from North America), followed by Bulgaria's country code 359, then the area code 4525 (without the leading zero), and the subscriber number. For instance, from the United States, you would dial 011 359 4525 12345.
Mobile and VoIP considerations: Calls to this geographic number from mobile networks are typically charged at standard national rates, which may vary depending on your operator. VoIP users should follow the same international dialing format when calling from abroad.
Overlay and Numbering Changes
As of the latest CRC updates, there are no overlay codes for the 4525 area. The numbering plan remains stable, and no additional digits are required for local calls. However, subscribers should always verify the current dialing procedures with their service provider, especially if they are using a corporate PBX or a VoIP gateway that may require a different prefix.