Area Code 251 – Dolj
The phone area code for Dolj is 251 (international format +40251). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 251
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Dolj
Geographic Coverage and Administrative Jurisdiction
The +40 251 country-code prefix is the National Destination Code (NDC) assigned to the landline telephone network of Dolj County, Romania. This geographic area code serves the historical region of Oltenia, with the county seat and primary city being Craiova, a major economic and university hub. The coverage area includes the entire county, encompassing municipalities such as Băilești, Calafat, Filiași, Segarcea, and numerous rural localities. As a geographic code, 251 is tied to the physical PSTN infrastructure of the region, and calls to this prefix are routed to fixed-line subscribers within Dolj.
Dialing Formats and Caller Instructions
For domestic callers within Romania, the national trunk prefix '0' is used before the area code, followed by the subscriber number. The complete national format is 0251 xxx xxx (where xxx xxx represents the local subscriber number, typically six digits). For international callers, the Romanian country code +40 is used, and the leading '0' of the national prefix is dropped, resulting in +40 251 xxx xxx. When dialing from a mobile phone within Romania, the same national format applies, but it is essential to include the '0' prefix. For example, to call a fixed line in Craiova from abroad, one would dial +40 251 123 456 (replace with actual digits). Local calls within the same area code can often be made using only the six-digit subscriber number, depending on the operator's dialing plan.
Numbering Plan and Overlay Considerations
Romania's numbering plan follows ITU-T E.164 recommendations. The 251 area code is a closed numbering plan, meaning the subscriber number length is fixed. Currently, there is no overlay code for Dolj; the 251 code is exclusive to the region. However, number portability allows subscribers to retain their 251 numbers when moving to other geographic areas, which may occasionally result in a number not being physically located in Dolj. This is a standard practice across the EU and does not affect the dialing format.
Usage and Services
Subscribers under 251 include residential and business fixed lines, as well as ISDN and VoIP services that are assigned geographic numbers. The prefix is used for both voice and fax services. For businesses, having a 251 number establishes a local presence in Dolj, which can be beneficial for customer trust and local marketing. Calls to 251 numbers are typically charged at standard national rates, depending on the caller's operator and tariff plan.