Outage in Telesign

Operator Alert - China (CN) - China Unicom (460/01;06;09)

Resolved Minor

May 25, 2026 - Started about 16 hours ago - Lasted about 5 hours
Official incident page

Incident Report

Summary AI Generated

China Unicom network issues caused delays in SMS message delivery for users in China from 12:08 PM to 4:42 PM PDT on May 25, 2026. The incident affected China Unicom subscribers across multiple network codes (460/01, 460/06, and 460/09) for approximately 4.6 hours. The network issues were resolved and SMS services returned to normal functionality.

Start Time: 12:08 PM PDT - 05/25/26 End Time: Ongoing We received notification that China Unicom (460/01;06;09) from China (CN) 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.

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Latest Updates ( sorted recent to last )

RESOLVED about 11 hours ago - at 05/25/2026 11:46PM

Start Time: 12:08 PM PDT - 05/25/26
End Time: 04:42 PM PDT - 05/25/26

We received notification that the network issues previously reported by China Unicom (460/01;06;09) from China (CN) have been resolved. China Unicom (460/01;06;09) end users should no longer experience delays receiving SMS messages as all services are back to functioning properly.

INVESTIGATING about 16 hours ago - at 05/25/2026 07:09PM

Start Time: 12:08 PM PDT - 05/25/26
End Time: Ongoing

We received notification that China Unicom (460/01;06;09) from China (CN) 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.

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