Area Code 3133 – Kalofer
The phone area code for Kalofer is 3133 (international format +3593133). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 3133
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Kalofer
Geographic Overview
The +359 3133 prefix is a geographic National Destination Code (NDC) assigned to the town of Kalofer and its immediate surrounding area in central Bulgaria. Kalofer is situated in the Rose Valley, at the foot of the Central Balkan Mountains, within Plovdiv Province. The code covers the urban area of Kalofer and nearby villages that fall under the local telephone exchange.
Dialing Formats
When calling a fixed-line subscriber in Kalofer from within Bulgaria, you must use the trunk prefix 0 followed by the area code and the subscriber number. The local subscriber number for Kalofer consists of 5 digits, making the complete national significant number (NSN) 8 digits long (0 3133 XXXXX). For example, a local number might be dialed as 03133 12345 from any Bulgarian phone.
For international callers, the Bulgarian country code +359 replaces the trunk prefix, and the area code is used without the leading zero. Thus, the same number would be dialed as +359 3133 12345 from abroad.
Caller Instructions
- Local callers within Kalofer can often dial just the 5-digit subscriber number, but for clarity and compatibility, it is recommended to use the full national format (03133 XXXXX).
- Domestic long-distance callers from other Bulgarian regions must dial 0 3133 XXXXX.
- International callers should dial +359 3133 XXXXX (or the international access code of their country, e.g., 00 from most European countries, followed by 359 3133 XXXXX).
Regulatory and Technical Notes
This is a geographic number under the Bulgarian Communications Regulation Commission (CRC) numbering plan. The service is primarily provided over the PSTN and VoIP networks that support geographic numbering. As with many rural areas in Bulgaria, the subscriber base is limited, and the code is not subject to overlay or area code changes. The number length is fixed at 8 digits (excluding the trunk prefix), and the prefix is not portable to mobile networks.
For businesses or individuals in Kalofer, using this geographic number reinforces a local presence. However, for modern communication needs, many residents also rely on mobile numbers, which are non-geographic and begin with 87, 88, 89, or 98.