Area Code 0933 – Caltanissetta
The phone area code for Caltanissetta is 0933 (international format +390933). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 0933
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Caltanissetta
Geographic Coverage and Administrative Jurisdiction
The Italian area code 0933 is a geographic National Destination Code (NDC) assigned to the province of Caltanissetta, located in the central-southern part of Sicily. The code serves the city of Caltanissetta itself, the provincial capital, as well as the surrounding municipalities and rural areas within the province. Key towns covered by this prefix include San Cataldo, Serradifalco, Mussomeli, Sutera, and Villalba, among others. The area is administratively part of the Sicily region and falls under the jurisdiction of the Sicilian Regional Authority for telecommunications regulation, following the national framework set by AGCOM (Autorità per le Garanzie nelle Comunicazioni).
Dialing Formats and Number Structure
When dialing a landline number in the Caltanissetta area from within Italy, the trunk prefix 0 is used, followed by the area code 933 and the subscriber number. The full national format is 0 933 XXX XXX, where the subscriber number typically consists of six to seven digits. For international callers, the Italian country code +39 is used, and the leading 0 is dropped. Thus, an international call would be formatted as +39 933 XXX XXX. For example, a local number in Caltanissetta might be dialed as 0933 123456 from within Italy, and as +39 933 123456 from abroad.
Local vs. International Caller Instructions
For local callers within the 0933 area, it is possible to dial the subscriber number directly without the area code when calling within the same local exchange area. However, for calls from other Italian regions, the full national number (including the trunk prefix 0) must be used. International callers must always include the country code +39 and omit the initial 0. It is important to note that Italy has implemented a closed numbering plan, meaning that the area code is an integral part of the subscriber number and must always be dialed, even for local calls, unless the operator supports abbreviated dialing for local calls, which is rare.
Overlay and Numbering Plan Considerations
As of the latest AGCOM updates, there are no overlay codes for the 0933 area. The numbering plan for Italy is regulated under the National Numbering Plan, and geographic codes are assigned to specific areas. The 0933 code is exclusively for fixed-line services, and it is not used for mobile or non-geographic services. Mobile numbers in Italy always begin with 3 (e.g., 3xx) and are non-geographic. If you receive a call from a number starting with 0933, it is a fixed-line call from the Caltanissetta area. For VoIP services, the number may be associated with a fixed-line service but routed over IP; however, the geographic significance remains for billing and emergency services purposes.