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[SITUATION] · [ACTIVE] · [TECHNOLOGY]

4 clusters · 32 sources · 18 days · First seen · Last updated

Spain implements 400 prefix for commercial calls

Overview

Spain has officially implemented a new telecommunications regulation requiring all commercial sales calls to use a specific nine-digit prefix starting with 400. Effective as of October 17, 2026, this measure—proposed by the Ministry for Digital Transformation and the Civil Service—aims to help consumers identify marketing calls before answering and to combat telephone fraud.

The new numbering system is unidirectional, meaning users can receive calls but cannot call back these specific numbers. This design is intended to prevent users from inadvertently returning calls to fraudulent sources. While large companies and essential service providers—such as electricity, gas, and telecommunications—are strictly bound by these rules, small businesses and freelancers must also adapt their sales outreach to comply.

Major operators have begun assigning number blocks. Movistar will utilize 400 00 1004, while DIGI will use several specific ranges and provide a ‘Commercial Call’ label on mobile screens. Telecommunications operators are also required to allow customers to block entire series of 400 numbers upon request.

Implementation has sparked debate regarding specific sectors, such as insurance brokerage. Experts suggest that while brokers performing cold calls using purchased databases must adopt the 400 prefix, those managing existing client portfolios for cross-selling may not be subject to the same requirements. Additionally, the National Commission on Markets and Competition (CNMC) is modifying rules for nomadic VoIP services, transitioning them from certain provincial ‘8’ numbers to a specific ‘51’ numbering block to prevent number exhaustion.

Entities

Movistar · Spain · National Commission on Markets and Competition · CNMC · Ministry for Digital Transformation and Civil Service

Claims

What the coverage asserts, and how many sources carry each claim.

Timeline

  1. [TECHNOLOGY] 3 sources
    Spain implements new telephone numbering regulations

    Spain has introduced a mandatory '400' prefix for commercial calls to aid consumer identification and is transitioning nomadic VoIP services to a new numbering block to prevent number exhaustion.

  2. [TECHNOLOGY] 12 sources
    Spain implements 400 prefix for commercial calls

    Spain has introduced a mandatory 400 prefix for all commercial phone calls to help consumers identify telemarketing and prevent fraud. The numbers are unidirectional and can be blocked by users.

  3. [TECHNOLOGY] 18 sources
    Spain implements 400 prefix for commercial calls

    Spain will implement a mandatory 400 prefix for commercial calls starting October 17 to help consumers identify and manage telemarketing and spam.

  4. [TECHNOLOGY] 3 sources
    Spain implements 400 prefix to identify telemarketing calls

    Spain introduces the 400 prefix on October 17 to identify commercial telemarketing calls, allowing consumers to distinguish sales attempts from service calls and providing new tools to manage spam.

Sources

adslzone.net · benaventedigital.es · bilbaohiria.com · cantabriaeconomica.com · catalunyapress.cat · centre-cerlatez.ch · covertalavera.com · cronicadecantabria.com · diaridetarragona.com · diariodeavisos.elespanol.com · elburgado.com · ep01.epimg.net · esdiario.com · gluecksdetektiv.de · grupoaseguranza.com · lacronicabadajoz.com · lasemainedansleboulonnais.fr · lavanguardia.com · malagahoy.es · menorca.info · merca2.es · moncloa.com · neeo.es · ocio.diariodemallorca.es · ocio.farodevigo.es · ocu.org · que.es · sydkusten.es · ultimahora.es · web.eldia.es · wwwhatsnew.com · xatakamovil.com

This summary has been updated 5 times: see revision history