Area Code 3589 – Tserovo, Pazardzhik

Geographic Coverage and Administrative Jurisdiction

The area code 3589 is a geographic National Destination Code (NDC) assigned to the town of Tserovo and its immediate surroundings within the Pazardzhik Province of Bulgaria. Administratively, Tserovo is part of the Pazardzhik Municipality, which serves as the regional administrative center. The code covers a predominantly rural and semi-urban area, with the town itself being the primary population center. The numbering area is served by fixed-line PSTN infrastructure, and the code is allocated by the Communications Regulation Commission (CRC) of Bulgaria under the national numbering plan, which adheres to ITU-T E.164 recommendations.

Dialing Formats and Caller Instructions

For callers within Bulgaria, the national trunk prefix 0 must be dialed before the area code. Thus, to call a Tserovo number from another Bulgarian city, dial: 0 3589 XXX XXX. For example, a local number might be formatted as 03589 123 456 when displayed in national format. International callers must replace the leading zero with the Bulgarian country code +359, resulting in the format +359 3589 XXX XXX. For instance, an international caller would dial +359 3589 123 456. When dialing from a mobile phone within Bulgaria, the same national format applies, but the leading zero is often automatically handled by the network.

Local Dialing and Overlay Considerations

Within the Tserovo local calling area, subscribers may be able to dial the subscriber number without the area code, depending on the specific local exchange configuration. However, with the migration towards a more unified national dialing plan, it is increasingly common to require the full national number (including the trunk prefix and area code) for all calls, even local ones. As of the current numbering plan, there are no overlay codes in this region, meaning that 3589 is the sole area code for Tserovo. This simplifies dialing procedures and reduces the need for 10-digit dialing, which is common in overlay areas.

Technical and Regulatory Notes

The fixed-line network in Tserovo is primarily served by copper-based PSTN, though fiber-optic and VoIP services are increasingly available. Number portability is in effect within Bulgaria, allowing subscribers to retain their numbers when switching between fixed-line operators, but the geographic significance of the code remains tied to the physical location of the exchange. For businesses, it is important to note that the cost of calls to Tserovo from other Bulgarian regions is typically charged as a national fixed-line call, while international rates apply for calls from abroad. For accurate billing and routing, always use the full international format when dialing from outside Bulgaria.