Sender ID registration in Spain
What CNMC + AEPD and the operators in Spain require for SMS sender IDs, how long approval takes, the accepted formats and sending rules, and how OmniChannels.ai registers yours.
- Registration
- Required
- Typical lead time
- Up to 1 month (CNMC alias registry)
- Alphanumeric sender ID
- Yes
- Regulator
- CNMC + AEPD
Short answer
Yes. Sender ID registration is required in Spain (CNMC alias registry (Registro de Alias), mandatory since 15 September 2026). Approval typically takes up to 1 month (CNMC alias registry). Alphanumeric IDs of up to 11 characters are accepted. OmniChannels.ai handles the filing across 4 operators and confirms current rules during onboarding.
Sender ID rules in Spain at a glance
| Regulator | Comisión Nacional de los Mercados y la Competencia + Agencia Española de Protección de Datos (CNMC + AEPD) |
|---|---|
| Registration required | RequiredCNMC alias registry (Registro de Alias), mandatory since 15 September 2026 |
| Typical lead time | Up to 1 month (CNMC alias registry) |
| Alphanumeric sender ID | YesLatin letters, up to 11 characters |
| Numeric long code / short code | Not listed for this market; alphanumeric is the documented format |
| Accepted formats | Alphanumeric alias (CNMC format rules) |
| Promotional sending hours | No regulator-published window foundAgree sending hours with the operator and schedule promotional sends for the recipient's local daytime; transactional traffic runs 24/7. |
| Opt-in | GDPR-compliant opt-in required. Double opt-in is the operator-preferred standard for marketing. |
| Opt-out | STOP keyword honoured network-wide. Opt-out is one-step and irreversible until the recipient re-consents. |
| Operators we reach | Movistar, Vodafone Spain, Orange Spain and MásMóvil |
| Last reviewed | 1 October 2026Sources: CNMC, AEPD, CNMC Registro de Alias, CNMC alias guide |
From BroadNet's regulatory research, last reviewed 1 October 2026. Rules change: we confirm them for your sender ID and traffic during onboarding.
Official sources: CNMC · AEPD · CNMC Registro de Alias · CNMC alias guide
How to register your sender ID in Spain through OmniChannels.ai
Sender ID registration fees are passed through at cost. We confirm the documents and the current rules for your traffic during onboarding.
Need the authorization letter?
Generate a ready-to-sign LOA or NOC for this country in English, Arabic or both. Free, and your details never leave your browser.
Generate your authorization letter- 1
Choose and check your sender ID
Pick a sender ID that matches your brand: Latin letters, up to 11 characters. Test it in the free sender ID checker first.
- 2
Send us your company details and use case
Tell us the legal entity, brand and what each sender ID will send (OTP, transactional or promotional). We confirm which supporting documents are currently needed.
- 3
We file with CNMC + AEPD and the operators
We prepare and submit the application. Current process in Spain: CNMC alias registry (Registro de Alias), mandatory since 15 September 2026.
- 4
Approval and test messages
Approval typically takes up to 1 month (CNMC alias registry). Once approved we send test messages on Movistar, Vodafone Spain, Orange Spain and MásMóvil and check the sender ID displays correctly.
- 5
Go live
Send through the REST API, SMPP or campaigns. Schedule promotional sends for the recipient's local daytime. Opt-out handling is applied to every promotional message.
Common reasons a sender ID is rejected in Spain
- Too long: sender IDs here are up to 11 characters.
- Generic words instead of a brand, such as INFO, SMS, OTP, ALERT: regulators usually refuse them.
- Arabic, accented or other non-Latin letters: this market lists Latin letters only.
- Spaces or symbols such as _ & ! ( ): many operators strip or refuse them; use a hyphen or nothing.
Run your proposed sender ID through the free sender ID checker, preselected for Spain, before you apply.
Register your sender ID in Spain
Send us your brand and use case. We file the sender ID for 4 operators, run the test messages and connect it to the same API, SMPP and campaign tools you use for every other market.
Sender ID in Spain: questions
Do I need to register a sender ID in Spain?
Yes. CNMC alias registry (Registro de Alias), mandatory since 15 September 2026. We submit it for you and confirm the current requirements during onboarding.
How long does sender ID registration take in Spain?
Typically up to 1 month (CNMC alias registry), depending on the registry and the documents provided. We confirm the current timeline for your sender ID during onboarding.
Can I use an alphanumeric sender ID in Spain?
Yes. Alphanumeric sender IDs are accepted: Latin letters, up to 11 characters. Accepted formats: Alphanumeric alias (CNMC format rules).
When can I send promotional SMS in Spain?
There is no regulator-published window that we know of in Spain. Agree sending hours with the operator and schedule promotional sends for the recipient's local daytime; transactional traffic runs 24/7.
What consent and opt-out rules apply in Spain?
GDPR-compliant opt-in required. Double opt-in is the operator-preferred standard for marketing. STOP keyword honoured network-wide. Opt-out is one-step and irreversible until the recipient re-consents.
Who regulates SMS sender IDs in Spain?
Comisión Nacional de los Mercados y la Competencia + Agencia Española de Protección de Datos (CNMC + AEPD), together with the mobile operators (Movistar, Vodafone Spain, Orange Spain and MásMóvil). Official sources: CNMC, AEPD, CNMC Registro de Alias, CNMC alias guide.
Related for Spain
Sender ID registration in nearby markets
- Belgium · No pre-registration
- France · 5–10 business days (alphanumeric)
- Germany · No pre-registration
- Ireland · No published time (ComReg registry)
- Italy · 5–7 business days
- Netherlands · No pre-registration
- Norway · No pre-registration
- Poland · 5–10 business days
- All countries
Data: BroadNet regulatory research, reviewed 1 October 2026. URL: https://omnichannels.ai/sender-id/spain/