Event Monitor Cyber
EM-20261103-E1UC OutageHigh severity

AT&T: Messaging Delivery Problems

Nov 3, 2026 · Carrier · reported by Vonage, Bandwidth, Twilio, Telnyx

Status
Confirmed

Since : 4 provider status pages acknowledged it.

First Signal
Nov 03 09:59 UTCT21 Vonage status
Page Born
Nov 03 14:38 UTCsecond source joined
Last Signal
Nov 04 02:26 UTC9 hours before snapshot
Sources
44 official · 0 research, news or crowd
Lasted
23 hoursso far

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 · Now
    A provider status page acknowledges it.
  4. 4
    Resolved
    Not yet
    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
    Nov 03 09:59 UTC
    T21 Vonage status
  2. Corroborated: reached
    Nov 03 14:38 UTC
    4 independent sources
  3. Acknowledged: reached
    Nov 03 09:59 UTC
    T21 status page
  4. Network Check: reached
    Nov 03 09:59 UTC
    C111 IODA: network normal (lowest 99.3%)
  5. Restored: not yet
    Not yet
    Still open

Timeline

06:0012:0018:00Nov 406:00BornT21 Vonage statusT18 Bandwidth statusT17 Twilio statusT19 Telnyx 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%Nov 2 09hNov 2 21hNov 3 09hNov 3 21h

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 99.3%): the problem was in message delivery, not the network.

Signals

  1. Vonage: USA MMS - Delivery Degradation affecting MMS traffic for AT&T network (opens source in a new tab) resolved. This incident has been resolved. Med severityProvider StatusT21 Vonage status
  2. Bandwidth: Outbound 10DLC MMS Delivery Incident - T-Mobile, Verizon, AT&T (opens source in a new tab) resolved. This incident has been resolved. High severityProvider StatusT18 Bandwidth status
  3. Twilio: MMS Delivery Receipt Delay and Delivery Delay from a Sub et of Twilio Long Code and Short Code to AT&T United State (opens source in a new tab) resolved. The incident has been resolved and MMS delivery receipts and MMS delivery from a subset of Twilio Long Codes and Short Codes to AT&T network subscribers in the United States are operating normally. Med severityProvider StatusT17 Twilio status
  4. Bandwidth: Outbound 10DLC MMS Delivery Incident - T-Mobile, Verizon, AT&T (opens source in a new tab) monitoring. Teams are observing expected messaging process behavior. We will continue to monitor for stability. High severityProvider StatusT18 Bandwidth status
  5. Vonage: USA MMS - Delivery Degradation affecting MMS traffic for AT&T network (opens source in a new tab) monitoring. A fix has been implemented and we are monitoring the results. Med severityProvider StatusT21 Vonage status
  6. Twilio: MMS Delivery Receipt Delay and Delivery Delay from a Sub et of Twilio Long Code and Short Code to AT&T United State (opens source in a new tab) monitoring. We have observed a recovery in MMS delivery and MMS delivery receipts from a subset of Twilio Long Codes and Short Codes to AT&T network subscribers in the United States and are monitoring service stability. … Med severityProvider StatusT17 Twilio status
  7. Twilio: MMS Delivery Receipt Delay and Delivery Delay from a Sub et of Twilio Long Code and Short Code to AT&T United State (opens source in a new tab) identified. Twilio customers may be experiencing MMS delivery delays from a subset of Twilio Long Codes and Short Codes to AT&T network subscribers in the United States. Our team has identified the cause, and is working … Med severityProvider StatusT17 Twilio status
  8. Twilio: MMS Delivery Receipt Delay and Delivery Delay from a Sub et of Twilio Long Code and Short Code to AT&T United State (opens source in a new tab) identified. Twilio customers may be experiencing MMS delivery delays from a subset of Twilio Long Codes and Short Codes to AT&T network subscribers in the United States. Our team has identified the cause, and is working … Med severityProvider StatusT17 Twilio status
  9. Twilio: MMS Delivery Receipt Delay and Delivery Delay from a Sub et of Twilio Long Code and Short Code to AT&T United State (opens source in a new tab) identified. Twilio customers may be experiencing MMS delivery delays from a subset of Twilio Long Codes and Short Codes to AT&T network subscribers in the United States. Our team has identified the cause, and is working … Med severityProvider StatusT17 Twilio status
  10. Twilio: MMS Delivery Receipt Delay and Delivery Delay from a Sub et of Twilio Long Code and Short Code to AT&T United State (opens source in a new tab) identified. Twilio customers may be experiencing MMS delivery receipt delays from a subset of Twilio Long Codes and Short Codes to AT&T network subscribers in the United States. Our team has identified the cause, and is … Med severityProvider StatusT17 Twilio status
  11. Telnyx: 10DLC Traffic Toward Tier 1 Carrier Delayed (opens source in a new tab) identified. We are experiencing delays across Tier 1 carriers AT&T, T-Mobile, and Verizon due to heightened traffic volume. Carriers report network constraints. Messages are processing but may face further delays as traf… Med severityProvider StatusT19 Telnyx status
  12. Vonage: USA MMS - Delivery Degradation affecting MMS traffic for AT&T network (opens source in a new tab) investigating. We have observed MMS delivery degradation affecting Long Codes and Short codes to AT&T network subscribers in the United States The carrier is aware of this issue and investigating the root cause. We will … Med severityProvider StatusT21 Vonage status
  13. Twilio: MMS Delivery Receipt Delay and Delivery Delay from a Sub et of Twilio Long Code and Short Code to AT&T United State (opens source in a new tab) investigating. Twilio customers may be experiencing MMS delivery receipt delays from a subset of Twilio Long Codes and Short Codes to AT&T network subscribers in the United States. Our team is actively investigating this… Med severityProvider StatusT17 Twilio status
  14. Bandwidth: Outbound 10DLC MMS Delivery Incident - T-Mobile, Verizon, AT&T (opens source in a new tab) investigating. Teams continue to work with the off net provided to resolve MMS delivery delays. This delay includes 10DLC Outbound MMS and Short Code MMS messages for T-Mobile, Verizon, and AT&T destinations. High severityProvider StatusT18 Bandwidth status
  15. Bandwidth: Outbound 10DLC MMS Delivery Incident - T-Mobile, Verizon, AT&T (opens source in a new tab) investigating. Bandwidth teams have identified an off-network incident impacting the timely delivery of MMS messages to T-Mobile and Verizon destinations. Bandwidth is working with this industry provider to restore expec… High severityProvider StatusT18 Bandwidth status
  16. Vonage: USA SMS - Delivery degradation affecting 10DLC traffic toward AT&T operator (opens source in a new tab) resolved. This incident has been resolved. Med severityProvider StatusT21 Vonage status
  17. Vonage: USA SMS - Delivery degradation affecting 10DLC traffic toward AT&T operator (opens source in a new tab) investigating. Please be advised that we are observing SMS delivery degradation for 10dlc towards AT&T operator in USA.. We are working towards resolution of the issue and will issue an update as soon as more information… Med severityProvider StatusT21 Vonage status