# Austria Mandates SMS Sender ID Registration October 16, 2026 at 01:55 PM > Austria's RTR regulator launches a mandatory registry for alphanumeric SMS IDs to combat fraud and block unauthorized sender names. **Austria** has implemented a mandatory registration for text-based alphanumeric **SMS** sender IDs as of October 1, 2026. The regulatory authority **RTR** announced that only registered IDs, which use letters like bank names instead of numbers, can reach end users. A new public directory now contains over 8,500 valid IDs after RTR manually checked 14,000 entries for plausibility. **Mobile operators** must verify IDs against this list before delivery, as direct alphanumeric SMS transmissions from abroad are now prohibited. With over 9,000 fraud complaints in 2026, Managing Director **Klaus M. Steinmaurer** noted the move targets SMS scams. Operators are now liable for violations, ensuring that any sender ID not included in the official RTR directory will be blocked immediately. [#Austria]() [#Cybersecurity]() #SMSFraud #RTR #Telecommunications ## Related news ## [Vienna Records 671 Antisemitic Incidents in 2026]() October 16, 2026 at 06:34 PM ## [Austria Launches 10 Days Against Phishing Campaign]() October 9, 2026 at 10:10 AM ## [Austria Launches Center Against Foreign Influence]() October 8, 2026 at 12:02 PM ## [Austrian Man Loses Five-Figure Sum in Cyberattack]() October 7, 2026 at 10:01 AM ## [Vienna Data Breach Exposes 26,000 Documents]() September 30, 2026 at 08:16 AM