Area Code 258 – Alba
The phone area code for Alba is 258 (international format +40258). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 258
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📍 Geographic Location of Alba
Geographic Coverage and Administrative Jurisdiction
The +40 258 country and area code combination is the National Destination Code (NDC) for the Alba region in Romania. This geographic prefix serves the western part of Transylvania, with its administrative center in Alba Iulia, a city of historical significance as the site of the 1918 union of Transylvania with Romania. The code covers the municipalities of Alba Iulia, Aiud, Blaj, Sebeș, and Cugir, as well as the surrounding rural areas within Alba County. As a geographic allocation, the prefix is tied to the PSTN (Public Switched Telephone Network) infrastructure, and calls to these numbers are routed based on the physical location of the fixed-line termination point.
Dialing Formats and Caller Instructions
For domestic callers within Romania, the area code is dialed with a leading zero: 0258. The full national significant number (NSN) consists of the area code plus the subscriber number, which is typically six digits long for fixed lines in this region. Thus, a typical local number appears as 0258-XXX-XXX (where X represents digits). When dialing from abroad, the leading zero is omitted, and the country code is added: +40 258 XXX XXX. For example, a fixed-line number in Alba Iulia might be dialed as +40 258 123 456 from an international caller. It is important to note that Romania's numbering plan follows the ITU-T E.164 recommendation, and the plus sign (+) indicates the international access prefix, which varies by country (e.g., 00 in most European countries, 011 in the United States).
Overlay and Numbering Considerations
As of the current numbering plan, there is no overlay code for the Alba region; the 258 prefix remains the sole geographic NDC for this area. However, number portability allows subscribers to retain their 0258 numbers when switching between fixed-line operators, which can sometimes lead to a number being associated with a different physical location than expected. For callers, this does not affect the dialing procedure, but it is a factor in routing and billing. The National Regulatory Authority for Communications (ANCOM) oversees the allocation and management of these codes, ensuring compliance with the national numbering plan.
Practical Usage and Business Implications
For businesses operating in Alba County, having a 0258 number establishes a local presence and can be more cost-effective for customers calling from the region. International callers should be aware that calls to Romanian fixed lines are typically charged at higher rates than domestic calls, and VoIP providers may offer lower rates. When dialing from a mobile phone within Romania, the same format applies, and the call is treated as a national call. For those using VoIP services, it is essential to include the +40 country code and the area code without the leading zero when dialing from abroad.