Area Code 4710 – Bolyarsko
The phone area code for Bolyarsko is 4710 (international format +3594710). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 4710
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Bolyarsko
Geographic Overview and Administrative Jurisdiction
The +359 4710 prefix is a geographic National Destination Code (NDC) assigned to the Bolyarsko area in Bulgaria. Bolyarsko is a small town and municipality located in the Yambol Province, in southeastern Bulgaria. The code covers the town itself and the surrounding villages within the municipal boundaries. As a geographic code, it is tied to a specific PSTN exchange, and calls to this prefix are routed over the traditional circuit-switched network, although VoIP providers may also carry such traffic.
Dialing Formats and Caller Instructions
For callers within Bulgaria, the national trunk prefix is 0, so a local call to Bolyarsko is made by dialing 04710 followed by the subscriber number. The full national number is ten digits in length (including the leading 0). For international callers, the country code +359 is used, and the leading 0 of the NDC is dropped. Thus, an international call to Bolyarsko would be dialed as +359 4710 followed by the local subscriber number. For example, if a local number were 12345, a call from abroad would be placed to +359 4710 12345. It is important to note that there are no area code overlays in this region, so the 4710 prefix uniquely identifies the Bolyarsko exchange.
Geographic Coverage and Numbering
The Bolyarsko municipality is a rural area, and the subscriber numbers associated with this prefix are typically short, often ranging from 4 to 6 digits. The total length of a national significant number (NSN) for Bulgaria is 8 to 9 digits, excluding the trunk prefix. For Bolyarsko, the NSN is 8 digits (4710 + 4-digit subscriber number) or 9 digits (4710 + 5-digit subscriber number), depending on the local numbering plan. The prefix is allocated to the incumbent fixed-line operator, but since the liberalization of the Bulgarian telecom market, other operators may also provide services in the area using this code.
Practical Considerations for Callers
When calling from a mobile phone in Bulgaria, you may need to include the trunk prefix 0, but this is not required if you are dialing from a fixed line in the same area code. However, it is always safe to use the full national format (0 + NDC + subscriber number) from any phone in Bulgaria. For international callers, ensure you have the correct country code and omit the leading 0. Rates for calls to geographic numbers are typically lower than those to mobile or premium numbers, but they vary depending on your operator and calling plan. If you are using VoIP services, ensure that you have correctly entered the number in international format to avoid routing errors.