Area Code 3783 – Svirkovo

Overview of Area Code 3783 (Svirkovo, Bulgaria)

Area code +359 3783 is a geographic destination code within the Bulgarian national numbering plan, allocated under the ITU-T E.164 standard. It serves the town of Svirkovo and its surrounding localities, situated in the Chirpan Municipality of Stara Zagora Province, in central Bulgaria. This code is part of the 3xxx series assigned to the Stara Zagora region, which includes other destinations such as Chirpan (0371) and Stara Zagora (042).

As a geographic code, +359 3783 is tied to a physical PSTN exchange and is primarily used for fixed-line telephony services. The number length for local subscribers is typically 7 digits after the trunk prefix, comprising the 4-digit area code (3783) and a 3-digit subscriber number (e.g., +359 3783 456). However, some lines may have 4-digit subscriber numbers, resulting in a total of 8 digits after the country code; always verify the exact length with your service provider.

Dialing Formats

Callers must use different formats depending on their location:

• Within Bulgaria (domestic call): Dial 0 3783 [subscriber number]. The leading '0' is the national trunk prefix, which is dropped when dialing from abroad.
• From outside Bulgaria (international call): Dial your country's international access code (e.g., 00 from most European countries, 011 from the US/Canada), followed by 359 3783 [subscriber number]. Do not include the trunk prefix '0'.

For example, to call a fixed line in Svirkovo with subscriber number 456789, a caller from the United States would dial: 011 359 3783 456789. A caller from within Bulgaria would dial: 0 3783 456789.

Geographic Coverage and Administrative Context

Svirkovo is a small town located in the Upper Thracian Plain, approximately 25 kilometers southeast of the city of Stara Zagora. The area code 3783 covers not only the town itself but also nearby villages and rural settlements that are part of the Chirpan municipality. The region is known for agriculture, particularly vineyards and grain production, and has a modest population. The exchange is operated by the incumbent telecom operator, Bulgarian Telecommunications Company (BTC), now part of the A1 Group, though alternative fixed-line operators may also provide services using this code.

As with all geographic codes in Bulgaria, number portability is available, meaning a fixed-line number can be transferred to a different operator while retaining the same area code. However, the geographic association remains, and the number cannot be moved outside the Svirkovo area.

Overlays and Numbering Plan Considerations

Currently, there is no overlay code for the 3783 area. The Bulgarian Communications Regulation Commission (CRC) has not introduced any additional area codes for this region, and the existing numbering capacity is sufficient for the local demand. Callers should always use the full national number (including the trunk prefix '0') when dialing from a mobile phone within Bulgaria, as mobile networks require the complete number for proper routing.