Event Monitor Cyber
EM-20261029-18LX OutageHigh severity

AT&T: Messaging Delivery Problems

Oct 29, 2026 · Carrier · reported by Vonage

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Status
Resolved

Since : 24 hours with no new signal.

First Signal
Oct 29 20:17 UTCT21 Vonage status
Page Born
Oct 29 20:17 UTC
Last Signal
Oct 29 21:57 UTC7 days before snapshot
Sources
11 official · 0 research, news or crowd
Lasted
26 hoursfirst signal to resolved

Life Of This Page

  1. 1
    Born
    A second, independent provider or measurement sees it.
  2. 2
    Developing
    Reports and measurements join.
  3. 3
    Confirmed
    A provider status page acknowledges it.
  4. 4
    Resolved · Now
    Every provider marks it resolved and 6 hours pass quietly, or 24 hours pass with no new signal.
  5. 5
    Archived
    Not yet
    30 days after resolved. Read only; the link keeps working. Reopens if it comes back.

The ID never changes, and earlier addresses keep working. A correction is logged, never overwritten. If two pages turn out to be one incident, the later one points to the earlier.

Outage Lifecycle

  1. First Report: reached
    Oct 29 20:17 UTC
    T21 Vonage status
  2. Corroborated: not yet
    Not yet
    1 independent source
  3. Acknowledged: reached
    Oct 29 20:17 UTC
    T21 status page
  4. Network Check: reached
    Oct 29 20:17 UTC
    C111 IODA: network normal (lowest 99.7%)
  5. Restored: reached
    Oct 30 21:57 UTC
    All status incidents resolved

Timeline

18:00Oct 3006:00BornResolvedT21 Vonage statusCrowd posts

Point at a mark to read it. Squares are signals, colored by severity; every one is also listed under Signals.

AT&T Network During The Incident

0%50%100%Oct 28 19hOct 29 07hOct 29 19hOct 30 07hOct 30 19h

Solid blue line: routes announced. Dashed amber line: networks answering pings. Both as a share of AT&T's normal, from C111 IODA, lowest reading in each 2 hours; the shaded band is the incident. The network itself stayed at normal (lowest 99.7%): the problem was in message delivery, not the network.

Signals

  1. Vonage: USA SMS/MMS - Delivery degradation affecting SMS and MMS traffic towards AT&T operator (opens source in a new tab) resolved. This incident has been resolved. Med severityProvider StatusT21 Vonage status
  2. Vonage: USA SMS/MMS - Delivery degradation affecting SMS and MMS traffic towards AT&T operator (opens source in a new tab) monitoring. A fix has been implemented and we are monitoring the results. Med severityProvider StatusT21 Vonage status
  3. Vonage: USA SMS/MMS - Delivery degradation affecting SMS and MMS traffic towards AT&T operator (opens source in a new tab) investigating. Please be advised that we are observing partial latency in SMS and MMS message delivery on AT&T operator in USA.. We are working towards resolution of the issue and will issue an update as soon as more… Med severityProvider StatusT21 Vonage status

Crowd Posts At The Time

  1. Según se informa, AT&T MX está caído para algunos usuarios. ¿Eres uno de ellos? AT&T MX is reportedly down for some users right now. Are yo (opens source in a new tab) u one of them? #ATTMx #ATTMxDown statusisdown.com/service/at_a... Info severityCrowdT57 Bluesky search ("outage" + carrier)

Public posts naming AT&T within 6 hours of the incident. Shown for context; they do not change the status.