Area Code 821 – Segovia
The phone area code for Segovia is 821 (international format +34821). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 821
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Segovia
Geographic Coverage and Administrative Jurisdiction
The +34 821 numbering block is a geographic National Destination Code (NDC) assigned to the province of Segovia, located in the autonomous community of Castile and León, Spain. This code covers the entire provincial territory, including the capital city of Segovia, as well as significant municipalities such as Cuéllar, El Espinar, La Granja de San Ildefonso, and Riaza. The area is characterized by a mix of urban centers and rural zones, with the code serving both residential and business subscribers within the province.
Dialing Formats and Caller Instructions
Within Spain, calls to numbers in the 821 area require dialing the full nine-digit national number, which includes the trunk prefix '9' (or '8' for mobile, but here it's '8'), the area code '21', and the subscriber number. For example, a local call within Segovia would be dialed as 821 123 456. However, from any other part of Spain, you must dial 921 123 456 (note: the leading '9' is the national trunk prefix, not part of the area code). For international callers, the format is +34 921 123 456 (or 0034 921 123 456 from countries using the international prefix 00). It is crucial to omit the leading '9' when dialing from abroad.
Numbering Plan and Overlay Considerations
Segovia is served by two geographic area codes: 921 (the original code) and 821 (an overlay code introduced to expand numbering capacity). This overlay means that both codes coexist within the same geographic region, and ten-digit dialing (including the trunk prefix) is mandatory for all calls within Spain. Subscribers may have numbers under either code, and there is no additional cost difference between calling a 921 or 821 number. The overlay ensures that new telephone lines can be provisioned without exhausting the existing numbering pool.
Technical and Regulatory Notes
Under the ITU-T E.164 international numbering plan, the country calling code for Spain is +34. The 821 NDC is a geographic code, meaning that the tariff for calls is typically based on the destination's geographic location, although many operators now offer flat-rate national calling plans. Number portability applies, allowing subscribers to retain their numbers when changing providers within the same geographic area. The allocation and management of the 821 code are overseen by the Spanish telecom regulator (Comisión Nacional de los Mercados y la Competencia, CNMC), ensuring compliance with national numbering regulations.