CNMC Alias Registry Blocks SMS Fraudulent Messages Starting June 7, 2026

Thu, 23 Apr 2026 22:29:01 +0000
Telecommunications

CNMC has approved Circular CIR/DTSA/010/25 establishing an Alias Registry for SMS, MMS, and RCS messages sent to Spanish phone numbers. Companies and public administrations that want to send messages using a brand name or commercial identifier as the sender must register that alias with CNMC beforehand; otherwise, messages will be blocked. Telecom operators must block all messages from unregistered aliases or aliases not received from enabled messaging providers starting 7 June 2026, based on Orden TDF/149/2025 of 12 February 2025.