Area Code 38 – Celje/Trbovlje
The phone area code for Celje/Trbovlje is 38 (international format +38638). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 38
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Celje/Trbovlje
Geographic Coverage and Administrative Jurisdiction
The Slovenian area code +386 38 is a geographic National Destination Code (NDC) allocated to the Celje and Trbovlje region. This area encompasses the Savinja Valley and parts of central Slovenia, including the municipalities of Celje, Trbovlje, Laško, Šentjur, and Žalec. As a geographic code, it routes calls to fixed-line PSTN and VoIP numbers physically located within this designated area. The code is administered by the Agency for Communication Networks and Services of the Republic of Slovenia (AKOS), which oversees the national numbering plan in compliance with ITU-T E.164 recommendations.
Primary Cities and Local Dialing
The principal city served by +386 38 is Celje, the third-largest city in Slovenia, followed by Trbovlje, a historic mining town. Other notable towns include Laško, known for its thermal springs and brewery, and Šentjur, a commercial hub. Subscribers within the same NDC can dial the local subscriber number without the trunk prefix or area code. For example, to reach a number in Celje, a local caller would dial only the 7-digit subscriber number (e.g., 234 5678).
International and National Dialing Formats
Callers from outside Slovenia must use the international format: +386 38 XXX XXX (or 00386 38 XXX XXX from most countries). The subscriber number is 7 digits long, making the total national significant number (NSN) 9 digits when including the NDC. For domestic calls from other Slovenian regions, dial the trunk prefix 0 followed by the area code and subscriber number: 0 38 XXX XXX. For example, a caller from Ljubljana would dial 0 38 234 5678 to reach a fixed line in Celje.
Overlay and Numbering Considerations
Currently, there is no overlay code for the Celje/Trbovlje area; the 38 code remains the sole geographic NDC for this region. However, number portability allows subscribers to retain their 38 numbers when switching providers, even if they move outside the geographic area. This means that a number with the 38 prefix may not always be physically located in the Celje region, although the code retains its geographic designation for routing purposes. Callers should be aware that while the code is geographic, the actual location of the called party may differ due to portability.
Caller Instructions
- Local callers (within the 38 area): Dial the 7-digit subscriber number directly.
- National callers (outside the 38 area): Dial 0 38 followed by the subscriber number.
- International callers: Dial the international access prefix (e.g., 00 or +) then 386 38 and the subscriber number.
When dialing from a mobile phone, it is recommended to use the international format (+386 38 ...) to avoid any ambiguity, especially when roaming. For businesses in the region, displaying the number in international format (+386 38 ...) ensures accessibility for global clients.