THIS IS A SCHEDULED EVENT Apr <var data-var='date'>23</var>, <var data-var='time'>04:00</var> - <var data-var='time'>09:00</var> UTCApr <var data-var='date'> 6</var>, <var data-var='time'>17:25</var> UTC Scheduled - Verizon USA has scheduled a maintenance. Impact SMS: Clients may experience delayed or failed Short Code and 10DLC MT/MO traffic towards Verizon-US Impact MMS: Clients may experience delayed or failed Short Code MT/MO traffic towards Verizon-US Maintenance start time: 2026-04-23 04:00 UTC Maintenance end time: 2026-04-23 09:00 UTC

External Maintenance - USA - Verizon

THIS IS A SCHEDULED EVENT Apr <var data-var='date'>21</var>, <var data-var='time'>04:00</var> - <var data-var='time'>09:00</var> UTCApr <var data-var='date'> 6</var>, <var data-var='time'>16:43</var> UTC Scheduled - Verizon USA has scheduled a maintenance. Impact SMS: Clients may experience delayed or failed Short Code and 10DLC MT/MO traffic towards Verizon-US Impact MMS: Clients may experience delayed or failed Short Code MT/MO traffic towards Verizon-US Maintenance start time: 2026-04-21 04:00 UTC Maintenance end time: 2026-04-21 09:00 UTC

THIS IS A SCHEDULED EVENT Apr <var data-var='date'>19</var>, <var data-var='time'>02:00</var> - <var data-var='time'>05:00</var> UTCApr <var data-var='date'> 7</var>, <var data-var='time'>16:33</var> UTC Scheduled - Services :: DI E-Mail 365 PCR Number :: PCRSDI-12170 Start Date and Time (GMT):: 19th April 2026 02:00 UTC. End Date and Time (GMT):: 19th April 2026 05:00 UTC. Description: AWS has recommended to upgrade java SDK for AWS to 2.x version from current 1.x . In current batch , we are upgrading email-provisioning,email-retarus-feedback, email-reload-events All services will be up and running during this time and there will be NO downtime . Impact: No impact . If you experience any issues during this maintenance , please contact the Operator Service NOC immediately at operatorservices.noc@sinch.com or +1 470.300.8394 (select 'support' from the menu, option 2 for Digital Interconnect and then option 1) and reference this notification.

DI E-Mail 365 | Application Maintenance | PCR Number # PCRSDI-12170

THIS IS A SCHEDULED EVENT Apr <var data-var='date'>16</var>, <var data-var='time'>09:00</var> - <var data-var='time'>09:30</var> UTCApr <var data-var='date'> 3</var>, <var data-var='time'>15:40</var> UTC Scheduled - We are writing to inform you that as part of our continuous efforts to improve the performance and reliability of our platform, we will be performing a scheduled maintenance on MMS platform at the times specified below. Type: Maintenance - MMS Start Time: 2026-04-16 09:00 UTC End Time: 2026-04-16 09:30 UTC Impact MMS: 10DLC MMS US, 10DLC MMS CA. Messages will be Queued and will be processed post upgrade. We expect intermittent delays during the maintenance window. We appreciate your patience and apologize for any inconvenience experienced during this maintenance period. If for any reason the maintenance is extended or cancelled, we will advise you accordingly. Please contact support@sinch.com should you require further information or assistance.

Sinch Internal Maintenance - MMS - Lookups

THIS IS A SCHEDULED EVENT Apr <var data-var='date'>14</var>, <var data-var='time'>04:00</var> - <var data-var='time'>07:00</var> UTCMar <var data-var='date'>27</var>, <var data-var='time'>13:53</var> UTC Scheduled - Dear Client, We will be performing a schedule network maintenance at our UK5 Network hub. Type: Schedule Network Maintenance Affected site: UK5 Network hub Impact: Impact: Clients may experience intermittent delayed/failed MT and MO traffic to and from the following countries. France United Kingdom Germany Russia Italy Netherlands French’s overseas territory Ireland Hong Kong Start time: 2026-04-14 04:00 UTC End time: 2026-04-14 07:00 UTC If for any reason the maintenance period is extended or cancelled we will advise you accordingly. And of course if you have any concerns please contact support@sinch.com. Please accept our apologies for the inconvenience. Best Regards, The Sinch Team

Sinch Scheduled Maintenance - UK5 Network Hub

THIS IS A SCHEDULED EVENT Apr <var data-var='date'>13</var>, <var data-var='time'>04:00</var> - <var data-var='time'>10:00</var> UTCMar <var data-var='date'>23</var>, <var data-var='time'>21:07</var> UTC Scheduled - An external supplier has scheduled a maintenance. Impact SMS: Clients may experience delayed or failed 10DLC MT/MO traffic towards the United States and Canada Impact MMS: Clients may experience delayed or failed 10DLC MT/MO traffic towards the United States Maintenance Start Time: 2026-04-13 04:00 UTC Maintenance End Time: 2026-04-13 10:00 UTC

External Maintenance - SMS and MMS

THIS IS A SCHEDULED EVENT Apr <var data-var='date'>12</var>, <var data-var='time'>06:00</var> - <var data-var='time'>06:10</var> UTCApr <var data-var='date'> 2</var>, <var data-var='time'>09:11</var> UTC Scheduled - Dear Customer, We will be performing Sinch Contact Pro, Session Border Controller (SBC) upgrade as follows. Start time: 2026-4-12 (Sunday) 6:00 AM UTC End time: 2026-4-12 (Sunday) 6:10 AM UTC Upgrading the Session Border Controller (SBC) will cause max. 10 min service break to the voice channel. For more details or questions related to the maintenance you can contact us via a support ticket: https://sinchenterprise.atlassian.net/servicedesk/customer/portal/1181 Best Regards, Sinch Contact Pro team

Sinch Contact Pro - (SBC) Session Border Controller upgrade - NA

THIS IS A SCHEDULED EVENT Apr <var data-var='date'>10</var>, <var data-var='time'>03:00</var> - <var data-var='time'>11:00</var> UTCApr <var data-var='date'> 7</var>, <var data-var='time'>23:19</var> UTC Scheduled - T-Mobile USA has scheduled a maintenance. Maintenance start time: 2026-04-10 03:00 UTC Maintenance end time: 2026-04-10 11:00 UTC Impact SMS: Clients may experience delayed or failed Short Code and 10DLC MT/MO traffic towards T-Mobile US Impact MMS: Clients may experience delayed or failed Short Code and 10DLC MT/MO traffic towards T-Mobile US

External Maintenance - USA - T-Mobile

THIS IS A SCHEDULED EVENT Apr <var data-var='date'>9</var>, <var data-var='time'>13:00</var> - <var data-var='time'>13:30</var> UTCApr <var data-var='date'> 3</var>, <var data-var='time'>20:27</var> UTC Update - We will be undergoing scheduled maintenance during this time.Apr <var data-var='date'> 9</var>, <var data-var='time'>13:00</var> UTC Scheduled - Please be advised that the scheduled maintenance is now scheduled for April 9, 2026. ---------- Sinch Elastic SIP Trunking will be deploying an update to resolve minor bugs with our routing servers. The scheduled work is not expected to impact services. This is being sent as a courtesy notice in the event that you experience issues with your service during the maintenance. We appreciate your patience and apologize for any inconvenience experienced during this maintenance period. If for any reason the maintenance is extended or cancelled, we will advise you accordingly. Please contact support@sinch.com should you require further information or assistance.

Sinch Scheduled Maintenance - Elastic SIP Trunking - routing servers

THIS IS A SCHEDULED EVENT Apr <var data-var='date'>9</var>, <var data-var='time'>05:00</var> - <var data-var='time'>10:00</var> UTCMar <var data-var='date'>31</var>, <var data-var='time'>18:39</var> UTC Scheduled - US Cellular - United states has scheduled a maintenance. Impact SMS: Clients may experience delayed or failed messages MT/MO traffic towards the United States Maintenance start time: 2026-04-09 05:00 UTC Maintenance end time: 2026-04-09 10:00 UTC

External Maintenance - US Cellular - United states

THIS IS A SCHEDULED EVENT Apr <var data-var='date'>9</var>, <var data-var='time'>03:00</var> - <var data-var='time'>11:00</var> UTCApr <var data-var='date'> 7</var>, <var data-var='time'>23:26</var> UTC Scheduled - T-Mobile USA has scheduled a maintenance. Maintenance start time: 2026-04-09 03:00 UTC Maintenance end time: 2026-04-09 11:00 UTC Impact SMS: Clients may experience delayed or failed Short Code and 10DLC MT/MO traffic towards T-Mobile US Impact MMS: Clients may experience delayed or failed Short Code and 10DLC MT/MO traffic towards T-Mobile US

Apr <var data-var='date'> 8</var>, <var data-var='time'>15:42</var> UTC Resolved - This incident has been resolved. Incident Start Time: 2026-04-08 13:00 UTC Incident End Time: 2026-04-08 15:22 UTCApr <var data-var='date'> 8</var>, <var data-var='time'>15:18</var> UTC Investigating - We want to inform you that we are currently experiencing a performance degradation impacting our OKTA Verification service globally. Incident Start Time: 2026-04-08 13:00 UTC Impact: Customers may experience delayed or failed verification attempts via the Okta endpoint. We sincerely apologize for any inconvenience this may cause and appreciate your understanding while we work to resolve the issue. For further information or assistance, please contact us at support@sinch.com.

Service Degradation – Verification – Global

Apr <var data-var='date'> 8</var>, <var data-var='time'>14:00</var> UTC Completed - The scheduled maintenance has been completed.Apr <var data-var='date'> 8</var>, <var data-var='time'>13:00</var> UTC In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Apr <var data-var='date'> 3</var>, <var data-var='time'>20:38</var> UTC Scheduled - Sinch Elastic SIP Trunking will be deploying a software update to add additional features and functionality. The scheduled work is not expected to impact services. This is being sent as a courtesy notice in the event that you experience issues with your service during the maintenance window. If for any reason the maintenance is extended or cancelled, we will advise you accordingly. Please contact support@sinch.com if you require further information or assistance. For information about our product enhancements, we encourage you subscribe to our Elastic SIP Trunking Release Notes posted in the Sinch Community at: https://community.sinch.com/

Sinch Scheduled Maintenance - Elastic SIP Trunking - call policy updates

Apr <var data-var='date'> 8</var>, <var data-var='time'>13:01</var> UTC Completed - The scheduled maintenance has been completed.Apr <var data-var='date'> 8</var>, <var data-var='time'>12:30</var> UTC In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Apr <var data-var='date'> 8</var>, <var data-var='time'>12:10</var> UTC Scheduled - Technical update on SFTP Connectors (France)

Campaigns Application Maintenance

Apr <var data-var='date'> 8</var>, <var data-var='time'>12:00</var> UTC Completed - The scheduled maintenance has been completed.Apr <var data-var='date'> 8</var>, <var data-var='time'>02:00</var> UTC In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Apr <var data-var='date'> 6</var>, <var data-var='time'>19:11</var> UTC Scheduled - T-Mobile USA has scheduled a maintenance. Impact SMS: Clients may experience delayed or failed Short Code and 10DLC MT/MO traffic towards T-Mobile US Impact MMS: Clients may experience delayed or failed Short Code and 10DLC MT/MO traffic towards T-Mobile US Maintenance start time: 2026-04-08 02:00 UTC Maintenance end time: 2026-04-08 12:00 UTC

Apr <var data-var='date'> 8</var>, <var data-var='time'>11:16</var> UTC Resolved - This incident has been resolved. Incident Start Time: 2026-04-08 07:52 UTC Incident End Time: 2026-04-08 10:30 UTCApr <var data-var='date'> 8</var>, <var data-var='time'>09:34</var> UTC Investigating - We are currently observing delivery issues in Spain - DigiMobile Incident Start Time: 2026-04-08 07:52 UTC Impact: Delayed MT's/Delayed MO's/Missing delivery receipts/Late delivery receipts We will update as soon as we have more information. If you have any questions, please contact support@sinch.com.

Delivery Issue Spain - DigiMobile

Apr <var data-var='date'> 8</var>, <var data-var='time'>11:07</var> UTC Resolved - This incident has been resolved. Incident Start Time: 2026-04-08 07:23 UTC Incident End Time: 2026-04-08 10:48 UTCApr <var data-var='date'> 8</var>, <var data-var='time'>10:24</var> UTC Update - We are continuing to investigate this issue.Apr <var data-var='date'> 8</var>, <var data-var='time'>08:29</var> UTC Investigating - We are currently observing delivery issues in Mexico - AT&T Incident Start Time: 2026-04-08 07:23 UTC Impact: Delayed MT's/Delayed MO's/Missing delivery receipts/Late delivery receipts We will update as soon as we have more information. If you have any questions, please contact support@sinch.com.

Delivery Issue Mexico - AT&T

Apr <var data-var='date'> 8</var>, <var data-var='time'>04:37</var> UTC Resolved - This incident has been resolved. Any future use of the test shortcode requires Compliance approval and completion of the updated agreement and terms.Apr <var data-var='date'> 6</var>, <var data-var='time'>10:02</var> UTC Update - We are continuing to investigate this issue.Apr <var data-var='date'> 5</var>, <var data-var='time'>09:20</var> UTC Update - We are continuing to investigate this issue.Apr <var data-var='date'> 3</var>, <var data-var='time'>14:33</var> UTC Update - We are continuing to investigate this issue.Apr <var data-var='date'> 2</var>, <var data-var='time'>07:13</var> UTC Update - We are continuing to investigate this issue.Apr <var data-var='date'> 1</var>, <var data-var='time'>06:46</var> UTC Update - We are continuing to investigate this issue.Mar <var data-var='date'>31</var>, <var data-var='time'>05:38</var> UTC Update - We are continuing to investigate this issue.Mar <var data-var='date'>29</var>, <var data-var='time'>20:19</var> UTC Update - We are continuing to investigate this issue.Mar <var data-var='date'>28</var>, <var data-var='time'>19:02</var> UTC Update - We are continuing to investigate this issue.Mar <var data-var='date'>27</var>, <var data-var='time'>18:27</var> UTC Update - We are continuing to investigate this issue.Mar <var data-var='date'>26</var>, <var data-var='time'>17:35</var> UTC Update - We are continuing to investigate this issue.Mar <var data-var='date'>25</var>, <var data-var='time'>14:10</var> UTC Update - We are continuing to investigate this issue.Mar <var data-var='date'>25</var>, <var data-var='time'>05:11</var> UTC Update - We are continuing to investigate this issue.Mar <var data-var='date'>25</var>, <var data-var='time'>00:33</var> UTC Update - We are continuing to investigate this issue.Mar <var data-var='date'>24</var>, <var data-var='time'>21:58</var> UTC Update - We are continuing to investigate this issue.Mar <var data-var='date'>24</var>, <var data-var='time'>17:01</var> UTC Investigating - Dear Client, We are currently investigating an issue affecting message delivery for US Test Short Code 10907. If you are experiencing impact, please be assured that our team is actively working to resolve the issue and restore normal service as quickly as possible. Incident Start Time: 2026-03-23 23:29 UTC Impact: Failed MT and MO messages associated with Short Code 10907 We will provide updates as additional information becomes available. If you have any questions, please contact our support team at support@sinch.com Sincerely, Sinch Support Team

Service Disruption Notice – US Test Short Code 10907

Apr <var data-var='date'> 7</var>, <var data-var='time'>20:00</var> UTC Completed - The scheduled maintenance has been completed.Apr <var data-var='date'> 7</var>, <var data-var='time'>19:00</var> UTC In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Mar <var data-var='date'>30</var>, <var data-var='time'>21:32</var> UTC Scheduled - Sinch will be deploying performing a software update to improve the voice calling experience. The change work will be performed on Europe: euc1.vp.sip.sinch.com. The scheduled work is not expected to impact services. This is being sent as a courtesy notice in the event that you experience issues with your service during the maintenance window. We appreciate your patience and apologize for any inconvenience experienced during this maintenance period. If for any reason the maintenance is extended or cancelled we will advise you accordingly. Please contact support@sinch.com for further information.

Sinch Scheduled Maintenance - Voice Services - SIP Trunking

Apr <var data-var='date'> 7</var>, <var data-var='time'>14:30</var> UTC Completed - The scheduled maintenance has been completed.Apr <var data-var='date'> 7</var>, <var data-var='time'>14:00</var> UTC In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Mar <var data-var='date'>23</var>, <var data-var='time'>14:31</var> UTC Scheduled - Dear Client, We are reaching out to inform you that we will perform a planned maintenance on our MO back-end, as part of our continuous efforts to create better resilience and future proof our systems. Start Time: 2026-04-07 14:00 End Time: 2026-04-07 14:30 Impact: Clients may experience slight delays up to 5 minutes for MOs from Singapore numbers We appreciate your patience and apologize for any inconvenience experienced during this maintenance period. If for any reason the maintenance is extended or cancelled we will advise you accordingly. Please contact support@sinch.com should you require further information or assistance.

Sinch Maintenance - Singapore MO migration

Apr <var data-var='date'> 7</var>, <var data-var='time'>14:01</var> UTC Completed - The scheduled maintenance has been completed.Apr <var data-var='date'> 7</var>, <var data-var='time'>06:00</var> UTC In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Mar <var data-var='date'>31</var>, <var data-var='time'>11:30</var> UTC Scheduled - Dear Customer This notification is related to Contact Pro test tenant maintenance. If you currently do not have a test tenant, please ignore this message. We will be upgrading all customer test tenants to the newest release 26Q2 on Tuesday 7th of April. During the day, there will be approximately 30 minutes service break for your test tenant. Tenants will be ready for your testing on Wednesday 8th of April at 06:00 UTC. Production tenants will be upgraded on April 25-26th. What´s new documentation regarding the upcoming 26Q2 release is available at: https://docs.cc.sinch.com/cloud/whats-new/en/index.html For more details or questions related to the maintenance you can contact us via a support ticket: https://sinchenterprise.atlassian.net/servicedesk/customer/portal/1181 Best Regards, Sinch Contact Pro team

Sinch Contact Pro - Test tenant upgrade

Apr <var data-var='date'> 7</var>, <var data-var='time'>11:00</var> UTC Completed - The scheduled maintenance has been completed.Apr <var data-var='date'> 7</var>, <var data-var='time'>10:00</var> UTC In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Mar <var data-var='date'>19</var>, <var data-var='time'>15:43</var> UTC Scheduled - Dear Client, Sinch will be performing a scheduled maintenance on our 10DLC Product at the times specified below. As part of this update, clients may see a delays or failures during delivery from 10DLC Numbers sending to US Devices. Start Time: 2026-04-07 10:00 UTC End Time: 2026-04-07 11:00 UTC We appreciate your patience and apologize for any inconvenience experienced during this maintenance period. If for any reason the maintenance is extended or cancelled we will advise you accordingly.

Sinch Maintenance - US 10DLC

Apr <var data-var='date'> 7</var>, <var data-var='time'>03:00</var> UTC Completed - The scheduled maintenance has been completed.Apr <var data-var='date'> 7</var>, <var data-var='time'>01:00</var> UTC In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Feb <var data-var='date'>18</var>, <var data-var='time'>20:27</var> UTC Scheduled - Dear Client, Sinch will be performing a scheduled maintenance to renew the SSL certificate for the callback.sinch.com Certificate Type: Scheduled Maintenance Maintenance: SSL Certificate Updates Start Time: 01:00 UTC End Time: 03:00 UTC Impact: Customers using callback.sinch.com for mTLS We appreciate your patience and apologize for any inconvenience experienced during this maintenance period. If for any reason the maintenance is extended or cancelled we will advise you accordingly. Download the certificate files here for callback.sinch.com https://clxgroup.sharepoint.com/:f:/s/CLX_Support_Anonymous_link/IgDu5APEHt5UTJw8PjBgpvvXAcJ6hJaffaMmPjlvvKOJrzk Please contact support@sinch.com should you require further information or assistance. Sincerely, Sinch

Sinch Internal Maintenance - SSL Certificate Update

Apr <var data-var='date'> 7</var>, <var data-var='time'>02:49</var> UTC Resolved - This issue has been resolved. We will monitor further.Apr <var data-var='date'> 7</var>, <var data-var='time'>02:25</var> UTC Investigating - Ticket Number :: MNOC-63780 Services:: DI SMS 365 (iSMS) Description :: Our internal monitoring has alerted to an incident. Few of our customers connected to iSMS platform may observe potential delay in delivery of messages. Impact :: Mobile Terminating (MT) Traffic: Potential Delay in delivery Mobile Originated (MO) Traffic: Potential Delay in delivery DR Notification : Potential Delay in delivery Report Manager Access : Not Impacted Report Manager Statistics : Not Impacted Incident Start Date & Time (GMT) : Tue 07th April 01:50 GMT 2026 If you have any questions, please contact the Operator Service NOC immediately at operatorservices.noc@sinch.com or +1 470.300.8394 (select ‘Support’ from the menu, option 2 for Digital Interconnect, and then option 1) and reference this notification.

DI SMS 365 (iSMS) | Operator Services | Delay in delivery | MNOC-63780

Apr <var data-var='date'> 6</var>, <var data-var='time'>12:00</var> UTC Completed - The scheduled maintenance has been completed.Apr <var data-var='date'> 6</var>, <var data-var='time'>02:00</var> UTC In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Apr <var data-var='date'> 3</var>, <var data-var='time'>06:29</var> UTC Scheduled - T-Mobile USA has scheduled a maintenance. Impact SMS: Clients may experience delayed or failed Short Code and 10DLC MT/MO traffic towards T-Mobile US Impact MMS: Clients may experience delayed or failed Short Code and 10DLC MT/MO traffic towards T-Mobile US Maintenance start time: 2026-04-06 02:00 UTC Maintenance end time: 2026-04-06 12:00 UTC

Is Sinch down?

Sinch status is UP

Lastest published events

Service Degradation – Verification – Global

Sinch Scheduled Maintenance - Elastic SIP Trunking - call policy updates

Campaigns Application Maintenance

Sinch Services, Components and Regions

Recent Sinch events

External Maintenance - USA - Verizon

External Maintenance - USA - Verizon

DI E-Mail 365 | Application Maintenance | PCR Number # PCRSDI-12170

Sinch Internal Maintenance - MMS - Lookups

Sinch Scheduled Maintenance - UK5 Network Hub

External Maintenance - SMS and MMS

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Is Sinch down?

Sinch status is UP

Lastest published events

Service Degradation – Verification – Global

Sinch Scheduled Maintenance - Elastic SIP Trunking - call policy updates

Campaigns Application Maintenance

Sinch Services, Components and Regions

Recent Sinch events

External Maintenance - USA - Verizon

External Maintenance - USA - Verizon

DI E-Mail 365 | Application Maintenance | PCR Number # PCRSDI-12170

Sinch Internal Maintenance - MMS - Lookups

Sinch Scheduled Maintenance - UK5 Network Hub

External Maintenance - SMS and MMS

Get your FREE account now,5 monitors included!

Get your FREE account now,
5 monitors included!