Outage in Zipwhip

SMS Delivery Delays to MobiFone Network in Vietnam via a Subset of Long Code Numbers & Alphanumeric Senders

Resolved Minor
October 31, 2025 - Started about 11 hours ago - Lasted about 11 hours
Official incident page

Incident Report

We are experiencing SMS delivery delays to MobiFone network in Vietnam via a subset of long code numbers & alphanumeric senders. Our engineers are working with our carrier partner to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

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Latest Updates ( sorted recent to last )
RESOLVED 26 minutes ago - at 11/01/2025 01:23AM

We are no longer experiencing SMS delivery delays to MobiFone network in Vietnam via a subset of long code numbers & alphanumeric senders. This incident has been resolved.

MONITORING about 2 hours ago - at 10/31/2025 11:34PM

We continue to observe recovery in SMS delivery delays when sending messages to MobiFone network in Vietnam via a subset of long code numbers & alphanumeric senders. We will continue monitoring the service to ensure a full recovery. We will provide another update in 2 hours or as soon as more information becomes available.

MONITORING about 4 hours ago - at 10/31/2025 09:32PM

We are observing recovery in SMS delivery delays when sending messages to MobiFone network in Vietnam via a subset of long code numbers & alphanumeric senders. We will continue monitoring the service to ensure a full recovery. We will provide another update in 2 hours or as soon as more information becomes available.

INVESTIGATING about 8 hours ago - at 10/31/2025 05:55PM

We are still experiencing SMS delivery delays to MobiFone network in Vietnam via a subset of long code numbers & alphanumeric senders. Our engineers are working with our carrier partner to resolve the issue. We will provide another update in 4 hours or as soon as more information becomes available.

INVESTIGATING about 10 hours ago - at 10/31/2025 03:58PM

We continue to experience SMS delivery delays to MobiFone network in Vietnam via a subset of long code numbers & alphanumeric senders. Our engineers are working with our carrier partner to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available.

INVESTIGATING about 11 hours ago - at 10/31/2025 02:58PM

We are experiencing SMS delivery delays to MobiFone network in Vietnam via a subset of long code numbers & alphanumeric senders. Our engineers are working with our carrier partner to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

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