Area Code 71 – Mobile - Operadores Móviles / OMV
The phone area code for Mobile - Operadores Móviles / OMV is 71 (international format +3471). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 71
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Overview of Spain's +34 71 Mobile Prefix
The +34 71 prefix is a non-geographic mobile code assigned within Spain's national numbering plan. Unlike geographic area codes that correspond to specific cities or provinces, the 71 prefix is dedicated to mobile services, including both Mobile Network Operators (MNOs) and Mobile Virtual Network Operators (MVNOs). This means the prefix does not indicate the caller's physical location but rather that the number belongs to a mobile subscriber.
Technical Specifications and Numbering
Spanish mobile numbers, including those starting with 71, follow the E.164 international standard. The full international format is +34 followed by the nine-digit national significant number (NSN). For example, a typical mobile number would be written as +34 71X XX XX XX, where 'X' represents any digit. When dialing domestically, the leading '+34' is replaced by '00' or '+' for international calls, but within Spain, callers simply dial the nine-digit number starting with 71. The total length of a Spanish mobile number is nine digits after the country code, and this structure is uniform across all mobile prefixes.
Regulatory and Porting Considerations
Spain's Comisión Nacional de los Mercados y la Competencia (CNMC) oversees number allocation and mobile number portability (MNP). Subscribers can retain their 71-prefixed number when switching between MNOs or MVNOs, a process that typically completes within one business day. As a result, the prefix does not reliably indicate the current operator, as numbers may have been ported from another network. This is an important consideration for businesses using number intelligence for routing or verification.
Dialing Instructions
For local callers within Spain, dialing a 71 mobile number requires only the nine-digit number (e.g., 71X XX XX XX). For international callers, the format is +34 71X XX XX XX (or 0034 71X XX XX XX from most countries). When sending SMS or MMS to a 71 number, the same international format applies. It is essential to include the country code when dialing from abroad; omitting it will result in a failed call.
Usage and Implications
The 71 prefix is used exclusively for mobile services, supporting voice, SMS, and data. It is not associated with fixed-line or VoIP services, though some VoIP providers may offer numbers with this prefix for mobile-like services. For businesses, understanding that 71 numbers are mobile is crucial for call routing, customer verification, and messaging campaigns, as mobile numbers may have different cost structures and regulatory requirements compared to geographic numbers.