TeleSign incident

Operator Alert - South Korea (KR) - KTF (450/02;04;08)

Major Resolved View vendor source →

TeleSign experienced a major incident on April 28, 2026 affecting South Korea, lasting 56m. The incident has been resolved; the full update timeline is below.

Started
Apr 28, 2026, 06:55 PM UTC
Resolved
Apr 28, 2026, 07:51 PM UTC
Duration
56m
Detected by Pingoru
Apr 28, 2026, 06:55 PM UTC

Affected components

South Korea

Update timeline

  1. investigating Apr 28, 2026, 06:55 PM UTC

    Start Time: 11:52 AM PST - 28/04/26 End Time: Ongoing We received notification that KTF (450/02;04;08) from South Korea (KR) is currently experiencing network issues, and this may cause a delay in the delivery of SMS messages. We will inform you once the operator has come to a resolution. SF 01163657

  2. resolved Apr 28, 2026, 07:51 PM UTC

    Start Time: 11:52 AM PST - 28/04/26 End Time: 12:35 PM PST - 28/04/26 We received notification that the network issues previously reported by KTF (450/02;04;08) from South Korea (KR) have been resolved. KTF (450/02;04;08) end users should no longer experience delays receiving SMS messages as all services are back to functioning properly. SF 01163657