Bulk SMS in Spain now requires every alphanumeric sender ID to be in the CNMC alias register: since 7 June 2026 Spanish operators block SMS, MMS and RCS sent with unregistered aliases. VoIP in Spain is open to registered operators, but since 2025 calls from abroad showing a Spanish number are blocked (except real roaming) and commercial calls can no longer come from mobile numbers.
Rules last checked: October 2026.
Bulk SMS in Spain: the CNMC alias register
Ministerial Order TDF/149/2025 on fraudulent calls and messages requires companies and public bodies to register in advance the aliases (alphanumeric sender names) they use. The CNMC, Spain's markets and competition regulator, runs the register. Key points as of 2026:
- the register covers SMS, MMS and RCS sent to Spanish (+34) numbers, from Spanish and foreign senders alike;
- the applicant must show a link to the alias: brand, trade name, company name or domain;
- providers can register aliases on behalf of their customers, and the alias holder must authorise the provider that sends for it;
- from 7 June 2026 operators must block messages with an unregistered alias, from an unregistered provider or without the holder's authorisation;
- a public CNMC portal shows which aliases are registered and who holds them.
The CNMC circular was amended again in September 2026, so confirm the current procedure with your provider. Numeric senders (Spanish long codes, short codes) do not need an alias registration but show a number. See sender ID registration by country and why grey SMS routes fail.
Consent and restricted content
Marketing SMS needs prior consent under Spanish e-commerce law (LSSI) and the GDPR, and each message must offer a simple, free opt-out. Transactional messages such as OTP do not need marketing consent but still need the registered alias. Avoid cannabis content, unlicensed gambling, loan offers and public URL shorteners. More in SMS content restrictions.
Spanish mobile networks
The main networks are Movistar (Telefonica), Vodafone, MasOrange (Orange, Yoigo and MasMovil brands) and Digi. Spanish mobile numbers start with 6 or 7. Spanish uses ñ and accented vowels: ñ, é and ù are in GSM-7 but á, í and ó are not, and one of them switches the message to Unicode with 70 characters per part.
VoIP in Spain: regulator and numbering
VoIP is legal in Spain. The CNMC keeps the register of operators and supervises the market, and the Ministry for Digital Transformation sets the numbering plan. Geographic numbers start with 8 or 9 (91 Madrid, 93 Barcelona), mobile with 6 or 7, and freephone with 900 or 800. Mobile termination is priced per network (mobile termination rates).
CLI rules and anti-spoofing measures in Spain
The same Order TDF/149/2025 changed how calls are presented:
- operators must block calls that use Spanish numbers that are not assigned to anyone;
- calls from abroad that show a Spanish number are blocked, except legitimate international roaming;
- since 7 June 2025, mobile numbers may not be used for unsolicited commercial calls or for customer service lines; those calls come from geographic numbers or 800 and 900 numbers.
For call centers this means a Spanish CLI only works on calls that really originate in Spain, from a number your company holds, and outbound sales cannot present a mobile number. Unsolicited sales calls also need consent or a legitimate basis, and numbers on the Robinson list must be excluded. See CLI spoofing rules and call center VoIP routes.
What buyers ask for on Spanish routes
- Which CLI is allowed on the route and whether it arrives intact (CLI vs non-CLI routes).
- Per-operator mobile rates, ASR, ACD and billing increments.
- For SMS: proof that the provider is registered with the CNMC and authorised for your alias.
Check coverage on the Spain VoIP destination page and the Spain SMS destination page, or read about our VoIP termination and A2P SMS routes. VoIPMatcher sources the route from its carriers and manages it; buyers and sellers never see each other. Request a Spain voice route or request a Spain SMS route.
Frequently asked questions
What happens to SMS sent to Spain with an unregistered sender ID?
Since 7 June 2026 Spanish operators must block SMS, MMS and RCS messages that use an alias not in the CNMC register, or that come from a provider not authorised by the alias holder. The message is not delivered. Register the alias, directly or through your provider, and confirm the provider is registered before sending.
Do foreign companies need to register their alias in Spain?
Yes. The register applies to every sender that uses an alphanumeric alias to reach +34 numbers, wherever the company is based. You must show a link to the name, such as a trademark, company name or domain. Sending from a numeric sender avoids the alias register, but recipients then see a number instead of your brand.
Can companies make sales calls from mobile numbers in Spain?
No. Since 7 June 2025 Spanish mobile numbers may not be used for unsolicited commercial calls or customer service lines. Commercial calls must come from geographic numbers or from 800 and 900 numbers, and callers must still respect consent rules and the Robinson opt-out list.
What is the Robinson list in Spain?
The Lista Robinson is Spain's free advertising exclusion service. Consumers register their phone number or other contact details to refuse marketing, and companies running campaigns to people who have not given consent must check it first. It applies to calls and SMS, and ignoring it can lead to data protection fines.
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