Area Code 36 – Celje/Trbovlje
The phone area code for Celje/Trbovlje is 36 (international format +38636). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 36
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Celje/Trbovlje
Overview of Slovenia's +386 36 Geographic Prefix
The +386 36 prefix is a geographic National Destination Code (NDC) within the Slovenian national numbering plan, administered by the Agency for Communication Networks and Services of the Republic of Slovenia (AKOS). This code serves the Celje and Trbovlje areas, located in the eastern part of the country. Celje, the third-largest city in Slovenia, is the principal urban center for this region, while Trbovlje is a smaller town situated in the Central Sava Valley. The prefix covers a mix of urban and rural communities, including municipalities such as Celje, Štore, Vojnik, and parts of the Laško and Trbovlje districts.
Dialing Formats and Usage
When dialing a number with the +386 36 prefix, the full international format is +386 36 XXXXXX, where XXXXXX represents the six-digit subscriber number. Within Slovenia, callers must use the trunk prefix 0 before the NDC, resulting in 036 XXXXXX. For example, a local call from Ljubljana to Celje would be dialed as 036 XXXXXX, while an international caller from abroad would dial +386 36 XXXXXX. It is important to note that the leading '0' is only used for domestic calls and is omitted when dialing from outside Slovenia.
The geographic nature of this prefix means that it is tied to a specific physical location, and calls are routed over the public switched telephone network (PSTN) to fixed-line subscribers. However, number portability allows subscribers to retain their numbers when switching providers, and in some cases, the number may be used for VoIP services, though the geographic association remains for administrative purposes.
Caller Instructions
For local callers within the Celje/Trbovlje area, it is possible to dial the subscriber number without the area code if the call is within the same local calling area, but this practice is becoming less common with the widespread adoption of full national dialing. For callers from other regions in Slovenia, always include the trunk prefix and area code: 036 XXXXXX. For international callers, replace the trunk prefix with the country code +386, and drop the leading zero: +386 36 XXXXXX.
This prefix is part of Slovenia's closed numbering plan, meaning that all numbers, including mobile and geographic, have a fixed length of nine digits after the country code. The +386 36 code is exclusively assigned to fixed-line services, and no mobile or non-geographic services are allocated under this prefix. As such, it is essential for businesses and individuals to ensure they use the correct dialing format to avoid call failures.