Event Monitor Cyber
EM-20261029-18LX OutageHigh severity

AT&T: Service Problems

Oct 29, 2026 · Carrier · reported by Provider status pages (Statuspage), Vonage

Status
Resolved

Since : 24 hours with no new signal.

First Signal
Oct 29 17:54 UTCC123 Provider status pages (Statuspage)
Page Born
Oct 29 20:17 UTCsecond source joined
Last Signal
Oct 29 21:57 UTC6 days before snapshot
Sources
22 official · 0 research, news or crowd
Lasted
28 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 address and ID never change. 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 17:54 UTC
    C123 Provider status pages (Statuspage)
  2. Corroborated: reached
    Oct 29 20:17 UTC
    2 independent sources
  3. Acknowledged: reached
    Oct 29 17:54 UTC
    C123 status page
  4. Network Check: reached
    Oct 29 17:54 UTC
    C111 IODA: network normal (lowest 99.7%)
  5. Restored: reached
    Oct 30 21:57 UTC
    All status incidents resolved

Timeline

12:0014:0016:0018:0020:0022:00Oct 3002:00BornResolvedC123 Provider status pages (StatuspaT21 Vonage status

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 17hOct 29 05hOct 29 17hOct 30 05hOct 30 17h

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 the service, not the network.

Signals

  1. Vonage: USA SMS/MMS - Delivery degradation affecting SMS and MMS traffic toward 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 toward 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 toward 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 inf… Med severityProvider StatusT21 Vonage status
  4. Clerk: SMS Delivery I ue (opens source in a new tab) investigating. We’ve identified an issue with an upstream SMS provider’s delivery route to AT&T numbers. The provider is switching traffic to an alternate route. We’re monitoring delivery rates and will share updates as … High severityProvider StatusC123 Provider status pages (Statuspage)
  5. Clerk: SMS Delivery I ue (opens source in a new tab) investigating. We're continuing to investigate SMS delivery issues with an upstream vendor impacting users on AT&T. High severityProvider StatusC123 Provider status pages (Statuspage)