Investigating - We are currently experiencing a service degradation affecting REST API in the US region.
Incident Start Time: 2026-08-16 17:58 UTC
Impact: Clients may experience delayed or failed message deliveries, missing delivery receipts, or intermittent API errors.
We sincerely apologize for the inconvenience and appreciate your patience while we resolve this matter. For further information or assistance, please contact us at support@sinch.com.
Aug 16, 2026 - 20:43 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Aug 16, 2026 - 01:00 UTC
Scheduled - Dear Customer,
We will be performing Contact Pro maintenance and version upgrade as follows.
Start time: 2026-8-16 (Sunday) 1 AM UTC End time: 2026-8-17 (Monday) 7 AM UTC
Version upgrade will require max. 30 minutes downtime to all channels and user interfaces. This will take place at some point during the maintenace window.
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Aug 15, 2026 - 16:01 UTC
Scheduled - Dear Customer,
We will be performing Contact Pro version upgrade as follows.
Start time: 2026-8-15 (Saturday) 4 PM UTC End time: 2026-8-16 (Sunday) 10 PM UTC
Version upgrade will require max. 30 minutes downtime to all channels and user interfaces. This will take place at some point during the maintenace window.
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Aug 15, 2026 - 16:00 UTC
Scheduled - Dear Customer,
We will be performing Contact Pro version upgrade as follows.
Start time: 2026-8-15 (Saturday) 4 PM UTC End time: 2026-8-16 (Sunday) 10 PM UTC
Version upgrade will require max. 30 minutes downtime to all channels and user interfaces. This will take place at some point during the maintenace window.
Services :: DI SMS 365 (SMSX) PCR Number :: PCRSDI-12329
Start Date and Time (GMT):: 18th August 2026 06:00 Hrs. End Date and Time (GMT):: 18th August 2026 10:00 Hrs.
Impact Mobile Terminating (MT) Traffic : Potential latency Mobile Originated (MO) Traffic : Potential latency DR Notification: Potential latency
Description: Digital Interconnect has scheduled a planned maintenance to carry out activities on the internal application and systems. Potential latency may occur in the delivery of messages.
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 Posted on
Aug 07, 2026 - 16:26 UTC
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: 2026-08-20 08:00 UTC End Time: 2026-08-20 10:30 UTC
Impact MMS: MMS US, MMS AU, MMS CA. Customers may experience intermittent delays during the maintenance window due to queued messages. All queued messages will be processed after the upgrade.
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. Posted on
Jul 30, 2026 - 16:32 UTC
We will be performing a maintenance on our connections towards Norway - ice at the times specified below.
Type: Scheduled Maintenance - Norway - ice Start Time: 2026-08-26 21:00 UTC End Time: 2026-08-26 23:00 UTC
Impact MT: Clients may experience delayed or failed MT traffic for outbound messages sent to Norway - ice.
Impact DR: Clients may experience delayed or failed delivery receipts for MT traffic sent to Norway - ice.
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. Posted on
Aug 10, 2026 - 08:39 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.
As part of this update, please note that the root certificates have also changed. We recommend updating the root certificates as well to ensure continued trust and smooth operation.
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: 2026-08-27 08:00 UTC End Time: 2026-08-27 10:30 UTC
Impact MMS: MMS US, MMS AU, MMS CA. Customers may experience intermittent delays during the maintenance window due to queued messages. All queued messages will be processed after the upgrade.
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. Posted on
Jul 30, 2026 - 16:32 UTC
To avoid connectivity issues, we recommend connecting to the below available endpoints during the maintenance window.
Available endpoints: au1-1.smpp.api.sinch.com au1-1.httpsms.api.sinch.com
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. Posted on
Aug 16, 2026 - 05:12 UTC
Sinch will be performing a scheduled maintenance on our US Shortcode Products.
As part of this update, clients may see a delays or failures during delivery from Shortcodes sending to US Devices.
Start Time: 2026-09-01 09:00 UTC End Time: 2026-09-01 10:00 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. Posted on
Aug 13, 2026 - 17:30 UTC
We will be performing a maintenance on our connections towards Norway - Telia.
Type: Scheduled Maintenance - Norway - Telia
Maintenance Start Time: 2026-09-01 21:00 UTC Maintenance End Time: 2026-09-01 23:00 UTC
Impact MT: Clients may experience delayed or failed MT traffic for outbound messages sent to Norway - Telia.
Impact DR: Clients may experience delayed or failed delivery receipts for MT traffic sent to Norway - Telia.
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. Posted on
Aug 13, 2026 - 17:18 UTC
As part of our commitment to platform reliability, security, and scalability, Sinch is adding a brand-new, high-efficiency site to our core SMSC billing and messaging routing engine product. This site expansion introduces a next-generation, high-performance architecture to significantly increase our regional capacity, improve overall platform stability, and ensure robust message processing.
New Regional Connection Endpoints that are planned to go live 2026-10-01 during the target window:
US SMPP: us6.smpp.api.sinch.com: US HTTP SMS: us6.httpsms.api.sinch.com US Lookup API: us6.httplookup.api.sinch.com
Type: Service Announcement & Maintenance Maintenance start time: 2026-10-01 07:00 UTC Maintenance end time: 2026-10-01 08:00 UTC
Action Required: Firewall Whitelisting
To ensure uninterrupted message delivery as we scale our traffic to include this new site we request that you update your firewall settings.
Affected API Endpoint: (This change only affects customers connecting to either of the following US endpoints)
US SMPP: us1.smpp.api.sinch.com and/or us7.smpp.api.sinch.com US HTTP SMS: us1.httpsms.api.sinch.com and/or us7.httpsms.api.sinch.com US Lookup API: us1.httplookup.api.sinch.com and/or us7.httplookup.api.sinch.com
IP Addresses to Whitelist Please coordinate with your network security team to whitelist these target IP addresses:
35.95.194.74 44.239.11.143 52.32.122.205
If for any reason the maintenance is extended, cancelled, or postponed, we will advise you accordingly.
Please contact support@sinch.com should you require further information or assistance. Posted on
Jul 10, 2026 - 08:37 UTC
Completed -
The scheduled maintenance has been completed.
Aug 16, 16:00 UTC
In progress -
Scheduled maintenance is currently in progress. We will provide updates as necessary.
Aug 15, 10:00 UTC
Scheduled -
Dear Customer,
We will be performing Contact Pro version upgrade as follows.
Start time: 2026-8-15 (Saturday) 10 AM UTC End time: 2026-8-16 (Sunday) 4 PM UTC
Version upgrade will require max. 30 minutes downtime to all channels and user interfaces. This will take place at some point during the maintenace window.
Completed -
The scheduled maintenance has been completed.
Aug 15, 22:00 UTC
In progress -
Scheduled maintenance is currently in progress. We will provide updates as necessary.
Aug 15, 18:00 UTC
Scheduled -
We are reaching out to inform you that Sinch has a scheduled maintenance on Message Manager.
Customers are advised not to schedule any campaigns during this maintenance window.
Maintenance Start Time: 2026-08-15 18:00 UTC Maintenance End Time: 2026-08-15 22:00 UTC
Impact: The Message Manager UI will be unavailable during the application upgrade.
If you experience any issues during this maintenance window, 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, then option 1).
Please reference this maintenance notification when contacting support.
Jul 30, 20:47 UTC
Completed -
The scheduled maintenance has been completed.
Aug 14, 10:00 UTC
In progress -
Scheduled maintenance is currently in progress. We will provide updates as necessary.
Aug 14, 05:00 UTC
Scheduled -
Services :: DI SMS 365 (SMSX) PCR Number :: PCRSDI-12320
Start Date and Time (GMT):: 14th August 2026 05:00 Hrs. End Date and Time (GMT):: 14th August 2026 10:00 Hrs.
Impact Mobile Terminating (MT) Traffic : No Impact Mobile Originated (MO) Traffic : No Impact DR Notification : No Impact Report Manager Access : Impacted. Report Manager Statistics : Impacted.
Description: Digital Interconnect has scheduled a planned maintenance to carry out activities on the internal application and systems. Report Manager may experience several slowdowns up to 1 minute and delayed up to 1 minute data in reports.
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.
Aug 12, 14:23 UTC
Completed -
The scheduled maintenance has been completed.
Aug 14, 03:30 UTC
In progress -
Scheduled maintenance is currently in progress. We will provide updates as necessary.
Aug 14, 03:00 UTC
Update -
We will be undergoing scheduled maintenance during this time.
Aug 7, 00:55 UTC
Scheduled -
The scheduled maintenance has a new start time - the work will start at 3:00 UTC (11 PM EDT on August 13, 2026)
---------
Sinch Elastic SIP Trunking will be undergoing maintenance on the policy engine to optimize and improve consumption of the CPU. 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.
Jul 31, 03:00 UTC
Resolved -
Please be advised that we experienced a short service interruption with the Sinch Number Lookup API service. Requests received a 500 response to number lookup API requests. The incident is now resolved and impact times were 21:10 - 21:29. All services are now restored.
We sincerely apologize for any inconvenience this may cause and appreciate your understanding as we close out this incident. For further information or assistance, please contact us at support@sinch.com.
Aug 13, 22:05 UTC
Completed -
The scheduled maintenance has been completed.
Aug 13, 10:30 UTC
In progress -
Scheduled maintenance is currently in progress. We will provide updates as necessary.
Aug 13, 08:00 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: 2026-08-13 08:00 UTC End Time: 2026-08-13 10:30 UTC
Impact MMS: MMS US, MMS AU, 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.
Jul 30, 16:32 UTC
Completed -
The scheduled maintenance has been completed.
Aug 13, 10:00 UTC
In progress -
Scheduled maintenance is currently in progress. We will provide updates as necessary.
Aug 13, 05:00 UTC
Update -
We will be undergoing scheduled maintenance during this time.
Aug 7, 16:32 UTC
Scheduled -
Services :: DI SMS 365 (SMSX) PCR Number :: PCRSDI-12322
Start Date and Time (GMT):: 13th August 2026 05:00 Hrs. End Date and Time (GMT):: 13th August 2026 10:00 Hrs.
Impact Mobile Terminating (MT) Traffic : No Impact Mobile Originated (MO) Traffic : No Impact DR Notification : No Impact Report Manager Access : Impacted. Report Manager Statistics : Impacted.
Description: Digital Interconnect has scheduled a planned maintenance to carry out activities on the internal application and systems. Report Manager may experience several slowdowns up to 1 minute and delayed up to 1 minute data in reports.
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.
Aug 7, 16:23 UTC
Completed -
The scheduled maintenance has been completed.
Aug 13, 05:01 UTC
In progress -
Scheduled maintenance is currently in progress. We will provide updates as necessary.
Aug 13, 02:00 UTC
Scheduled -
Dear Client,
We are reaching out to inform you that as part of our continuous efforts to improve the performance and reliability of our services, we will be performing maintenance at our EU3 network hub on the scheduled time window below.
Maintenance start time: 2026-08-13 02:00 UTC Maintenance end time: 2026-08-13 05:00 UTC
Impact: Customers may experience multiple brief connectivity issues during the duration of this maintenance towards the impacted endpoints listed below.
To avoid connectivity issues we recommend connecting to the below endpoints during the duration of this maintenance.
Available endpoints: eu1.smpp.api.sinch.com eu1.httpsms.api.sinch.com eu1.httplookup.api.sinch.com
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.
Jul 24, 15:19 UTC
Completed -
The scheduled maintenance has been completed.
Aug 13, 05:00 UTC
In progress -
Scheduled maintenance is currently in progress. We will provide updates as necessary.
Aug 13, 03:00 UTC
Update -
We will be undergoing scheduled maintenance during this time.
Aug 7, 00:51 UTC
Update -
We will be undergoing scheduled maintenance during this time.
Aug 5, 04:59 UTC
Scheduled -
The scheduled maintenance has a new start time - the work will start at 3:00 UTC (11 PM EDT on August 12, 2026)
--------
Please note that we are extending this maintenance window to resolve a memory issue on our media servers.
----- Sinch Elastic SIP Trunking will be undergoing maintenance to resolve an issue with emergency calls presented with an RPID. This update is not expected to impact your services. This is being sent as a courtesy notice in the event that you experience issues that extend beyond 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.
Jul 31, 02:49 UTC
Completed -
The scheduled maintenance has been completed.
Aug 12, 10:00 UTC
In progress -
Scheduled maintenance is currently in progress. We will provide updates as necessary.
Aug 12, 05:00 UTC
Update -
We will be undergoing scheduled maintenance during this time.
Aug 7, 17:20 UTC
Scheduled -
Services :: DI SMS 365 (SMSX) PCR Number :: PCRSDI-12321
Start Date and Time (GMT):: 12th August 2026 05:00 Hrs. End Date and Time (GMT):: 12th August 2026 10:00 Hrs.
Impact Mobile Terminating (MT) Traffic : No Impact Mobile Originated (MO) Traffic : No Impact DR Notification : No Impact Report Manager Access : Impacted. Report Manager Statistics : Impacted.
Description: Digital Interconnect has scheduled a planned maintenance to carry out activities on the internal application and systems. Report Manager may experience several slowdowns up to 1 minute and delayed up to 1 minute data in reports.
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.
Aug 7, 16:21 UTC
Completed -
The scheduled maintenance has been completed.
Aug 12, 04:00 UTC
In progress -
Scheduled maintenance is currently in progress. We will provide updates as necessary.
Aug 12, 03:00 UTC
Update -
We will be undergoing scheduled maintenance during this time.
Aug 7, 00:49 UTC
Scheduled -
The scheduled maintenance has a new start time - the work will start at 3:00 UTC (11 PM EDT on August 11, 2026) ------ Sinch Elastic SIP Trunking will be undergoing maintenance on the voice routing engine - 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.
Jul 31, 02:39 UTC
Completed -
The scheduled maintenance has been completed.
Aug 11, 10:30 UTC
In progress -
Scheduled maintenance is currently in progress. We will provide updates as necessary.
Aug 11, 05:30 UTC
Scheduled -
Services: DI SMS 365 (iSMS) PCR Number: PCRSDI-12333
Start Date and Time (GMT) :: 11th August 2026 5:30:00 Hrs. End Date and Time (GMT) :: 11th August 2026 10:30 Hrs.
Impact Mobile Terminating (MT) Traffic: No impact expected. Mobile Originated (MO) Traffic: No impact expected. DR Notification: No impact expected. Report Manager Access: Not impacted Report Manager Statistics: Not impacted
Description: Sinch Digital Interconnect has scheduled a planned maintenance to carry out activities on the internal applications; no impact is expected during this activity.
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. This scheduled maintenance affected: Sinch DI Services (International SMS 365).
Aug 7, 16:14 UTC
Completed -
The scheduled maintenance has been completed.
Aug 11, 10:00 UTC
In progress -
Scheduled maintenance is currently in progress. We will provide updates as necessary.
Aug 11, 05:00 UTC
Scheduled -
Services :: DI SMS 365 (SMSX) PCR Number :: PCRSDI-12320
Start Date and Time (GMT):: 11th August 2026 05:00 Hrs. End Date and Time (GMT):: 11th August 2026 10:00 Hrs.
Impact Mobile Terminating (MT) Traffic : No Impact Mobile Originated (MO) Traffic : No Impact DR Notification : No Impact Report Manager Access : Impacted. Report Manager Statistics : Impacted.
Description: Digital Interconnect has scheduled a planned maintenance to carry out activities on the internal application and systems. Report Manager may experience several slowdowns up to 1 minute and delayed up to 1 minute data in reports.
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. This scheduled maintenance affected: Sinch DI Services (SMS 365 Operator RoW, SMS 365 Operator US).
Aug 7, 16:16 UTC
Completed -
The scheduled maintenance has been completed.
Aug 4, 13:00 UTC
In progress -
Scheduled maintenance is currently in progress. We will provide updates as necessary.
Aug 4, 05:00 UTC
Scheduled -
Services :: DI SMS 365 (SMSX) PCR Number :: PCRSDI-12318
Start Date and Time (GMT):: 4 August 2026 5:00 Hrs. End Date and Time (GMT):: 4 August 2026 13:00 Hrs.
Impact Mobile Terminating (MT) Traffic : No impact Mobile Originated (MO) Traffic : No impact DR Notification : No Impact Report Manager Access : Potential Impact
Description: Digital Interconnect has scheduled a planned maintenance to carry out activities on the internal application and systems.
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.
Jul 28, 15:59 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.
As part of this update, please note that the root certificates have also changed. We recommend updating the root certificates as well to ensure continued trust and smooth operation.
Completed -
The scheduled maintenance has been completed.
Aug 4, 09:00 UTC
In progress -
Scheduled maintenance is currently in progress. We will provide updates as necessary.
Aug 4, 06:00 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 maintenance on our dashboard database between 6:00 and 9:00 UTC on August 4th.
Maintenance Start Time: August 4th 2026, 6:00 UTC Maintenance End Time: August 4th 2026, 9:00 UTC
Impact: Customers may experience a slight increase in latency of Dashboard functionality - Short Code pages throughout the maintenance window, and a brief downtime of about 10 seconds as the database switches over to the secondary database.
We appreciate your patience and apologise 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.
Jul 16, 16:07 UTC