Area Code 857 – Cordova
The phone area code for Cordova is 857 (international format +34857). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 857
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Cordova
Geographic Coverage and Administrative Jurisdiction
The +34 857 prefix is a geographic National Destination Code (NDC) assigned to the province of Córdoba, within the autonomous community of Andalusia, Spain. This code serves the entire province, including the capital city of Córdoba and its surrounding municipalities, such as Lucena, Puente Genil, Montilla, and Priego de Córdoba. It is important to note that 857 is an overlay code for the older 957 prefix, which historically covered the same geographic area. As a result, local calls within the province require 9-digit dialing (including the prefix) even for adjacent numbers, following the national numbering plan.
Dialing Formats and Caller Instructions
For local callers within Spain, dialing a number in Córdoba requires the full 9-digit number, which includes the prefix 857 followed by the subscriber's 6-digit line number. For example, to call a landline in Córdoba from Madrid, you would dial 857 123 456. International callers must use the country code for Spain (+34) followed by the 9-digit number, omitting any leading trunk prefix. Thus, a caller from the United States would dial 011 34 857 123 456, while a caller from the United Kingdom would dial 00 34 857 123 456. It is essential to include the prefix 857 when dialing from abroad, as omitting it will result in an incomplete number.
Overlay Considerations and Number Portability
Since 857 is an overlay of 957, both codes coexist within the same geographic region. This means that new landline connections in Córdoba may be assigned either prefix, depending on number availability. Subscribers who switch providers can retain their existing numbers, including the prefix, thanks to local number portability regulations. This overlay system ensures a continuous supply of numbers without requiring existing customers to change their numbers.
Usage and Service Characteristics
Numbers under the 857 prefix are primarily used for fixed-line PSTN and VoIP services, serving residential, business, and government entities. They are geographic numbers, meaning that the tariff for calling them is based on the destination's location within Spain. Calls from mobile phones to 857 numbers are typically included in national calling plans, but charges may vary depending on the operator. It is also common for businesses to use these numbers for customer service lines, as they convey a local presence in Córdoba.
Practical Examples
To illustrate, a local business in Córdoba might have the number 857 555 014. A customer in Seville would dial 857 555 014 (since both are in Spain), while an international client in Germany would dial 00 34 857 555 014. Always verify the complete number, as the 6-digit subscriber portion is essential for successful connection.