Is this sales call legal?
Since 17 October 2026, companies in Spain may only make sales calls from nine-digit numbers that start with 400. Type the number that called you to see whether a sales call from it follows the rule.
What you can do
- Say no and ask the company to delete your number from its list of contacts.
- Sign up to the Lista Robinson to opt out of advertising calls.
- Ask your operator to block calls from the 400 range, or block them with an app such as NoCall.
- Complain to the Telecommunications User Office (OAUT) about a sales call that did not come from a 400 number.
Called to sell you something and not sure they were allowed to? Take the 3-question test
Can they call me to sell? A 3-question test
If someone called you in Spain to sell you something, answer three questions to find out whether the call followed Spanish rules and what you can do. Your answers never leave your browser.
Question 1 of 3
Did the call come from a number starting with 400?
Check the number in your call log. If it was hidden, or an ordinary mobile or landline number, answer "No".
Your answers stay in your browser: we do not send or store them. We only log the result, with nothing about you.
Sources
- Resolución de 14 de abril de 2026, de la Secretaría de Estado de Telecomunicaciones e Infraestructuras Digitales (BOE núm. 93, de 16 de abril de 2026, BOE-A-2026-8409) · Boletín Oficial del Estado
- Las llamadas comerciales deberán usar el prefijo 400 (nota de prensa, 16 de abril de 2026) · Ministerio para la Transformación Digital y de la Función Pública
- Oficina de Atención al Usuario de Telecomunicaciones (OAUT) · Secretaría de Estado de Telecomunicaciones e Infraestructuras Digitales
- Lista Robinson: servicio de exclusión publicitaria · Lista Robinson
- Ley 11/2022, de 28 de junio, General de Telecomunicaciones, artículo 66.1.b · Boletín Oficial del Estado
- Numeración con prefijo 400 para las llamadas comerciales: preguntas y respuestas (16 de octubre de 2026) · Ministerio para la Transformación Digital y de la Función Pública
- Derecho a no recibir llamadas comerciales no solicitadas · Agencia Española de Protección de Datos
This content is for information only and is not legal advice.
Which countries it covers
This tool only applies Spain’s rule (BOE-A-2026-8409, in force since 17 October 2026). Spanish numbers can be checked from any edition.
Indicative information from published numbering plans. It describes the type of number, never the person or company behind it.
Frequently asked questions
Since when must sales calls use 400?
Since 17 October 2026. The resolution was published in Spain’s Official State Gazette on 16 April 2026 and gave six months for the range to be ready.
Is a call from a 400 number a scam?
Not necessarily. It means the call is commercial, which is legal, but it does not make the offer a good one. You can always say no.
Will my bank or electricity company call me from a 400 number?
It shouldn’t for an incident or after-sales service: 400 may not be used for customer service. Those calls come from short, 800/900 or landline numbers.
What is a sales call?
According to the Ministry, it is a call a company makes to reach potential customers and make them a commercial offer during the call. Customer-service calls are the ones a company makes with its customers to handle contracts they already have.
Can they sell me something during a customer-service call?
No, unless the offer is related to solving your query, complaint, claim or incident and also improves the service conditions or price for you, according to the Customer Service Law quoted by the Ministry.
Can I call a 400 number back?
No. 400 numbers can only make calls: setting up calls to them is prohibited.
Where do I complain about a sales call from a number that is not a 400?
The Ministry says you can file a claim with the Telecommunications User Office (OAUT) or a complaint with the CNMC.