DI SMS 365 (iSMS) | Operator Services | Potential delay in delivery of MO, MT and DR | TT#MNOC-64082
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Monitoring - A fix has been implemented and we are monitoring the results.
May 06, 2026 - 10:09 UTC
May 06, 2026 - 10:09 UTC
Investigating - Ticket Number :: MNOC-64082
Services:: DI SMS 365 (iSMS)
Description ::
Our internal monitoring has alerted to an incident. Few of our customers may observe delays in delivery for MO, MT and DR messages. Our support team is currently working on high priority to resolve this issue. Monitoring NOC will continue to follow-up and update you on the progress made.
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) : May 06 09:20:47 UTC 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.
May 06, 2026 - 09:36 UTC
Services:: DI SMS 365 (iSMS)
Description ::
Our internal monitoring has alerted to an incident. Few of our customers may observe delays in delivery for MO, MT and DR messages. Our support team is currently working on high priority to resolve this issue. Monitoring NOC will continue to follow-up and update you on the progress made.
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) : May 06 09:20:47 UTC 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.
May 06, 2026 - 09:36 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
May 06, 2026 - 03:00 UTC
May 06, 2026 - 03:00 UTC
Scheduled - T-Mobile USA has scheduled a maintenance.
Impact MMS: Clients may experience delayed or failed Short Code and 10DLC MT/MO traffic towards T-Mobile US
Maintenance start time: 2026-05-06 03:00 UTC
Maintenance End time: 2026-05-06 11:00 UTC
May 6, 2026 03:00-11:00 UTC
Impact MMS: Clients may experience delayed or failed Short Code and 10DLC MT/MO traffic towards T-Mobile US
Maintenance start time: 2026-05-06 03:00 UTC
Maintenance End time: 2026-05-06 11:00 UTC
May 6, 2026 03:00-11:00 UTC
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Degraded Performance
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Maintenance
Scheduled Maintenance
Singapore Regulatory Compliance Maintenance - A2P SMS APIs - TLS 1.3 Requirement Apr 1, 2026 00:00-01:00 UTC
Update -
The Infocomm Media Development Authority (IMDA) of Singapore has mandated the use of TLS (Transport Layer Security) 1.3 for all API connections handling A2P SMS traffic, effective April 1, 2026.
To ensure compliance and prevent any possible service disruption, all customers sending SMS traffic to Singapore must update their systems to support TLS 1.3 before this deadline.
Sinch Platform Readiness:
Our commitment is to provide a secure and resilient infrastructure.
We have already enabled full TLS 1.3 support across our global A2P SMSC infrastructure.
The final site, EU3 (IP 93.158.78.4) is now fully complaint to TLS 1.3 since March 17th, 2026.
Required Customer Action:
Verify Your Configuration: We strongly urge you to begin transitioning your systems to use TLS 1.3 for connections to Sinch immediately.
Compliance Deadline:
In accordance with IMDA requirements, connections using TLS 1.2 for traffic to Singapore should not be supported after April 1, 2026. To avoid any possible interruption of service to Singapore, you must complete your transition before this date.
Our team is ready to help ensure your transition is smooth and seamless.
Please do not hesitate to contact our customer support or account manager if you have any questions or require assistance.
Mar 18, 2026 - 08:49 UTC
To ensure compliance and prevent any possible service disruption, all customers sending SMS traffic to Singapore must update their systems to support TLS 1.3 before this deadline.
Sinch Platform Readiness:
Our commitment is to provide a secure and resilient infrastructure.
We have already enabled full TLS 1.3 support across our global A2P SMSC infrastructure.
The final site, EU3 (IP 93.158.78.4) is now fully complaint to TLS 1.3 since March 17th, 2026.
Required Customer Action:
Verify Your Configuration: We strongly urge you to begin transitioning your systems to use TLS 1.3 for connections to Sinch immediately.
Compliance Deadline:
In accordance with IMDA requirements, connections using TLS 1.2 for traffic to Singapore should not be supported after April 1, 2026. To avoid any possible interruption of service to Singapore, you must complete your transition before this date.
Our team is ready to help ensure your transition is smooth and seamless.
Please do not hesitate to contact our customer support or account manager if you have any questions or require assistance.
Mar 18, 2026 - 08:49 UTC
Scheduled -
The Infocomm Media Development Authority (IMDA) of Singapore has mandated the use of TLS (Transport Layer Security) 1.3 for all API connections handling A2P SMS traffic, effective April 1, 2026.
To ensure compliance and prevent any possible service disruption, all customers sending SMS traffic to Singapore must update their systems to support TLS 1.3 before this deadline.
Sinch Platform Readiness:
Our commitment is to provide a secure and resilient infrastructure.
We have already enabled full TLS 1.3 support across our global A2P SMSC infrastructure. The final site, EU3 (IP 93.158.78.4), will be fully compliant to TLS 1.3 by end of February 2026, well ahead of the deadline.
Required Customer Action:
Verify Your Configuration: We strongly urge you to begin transitioning your systems to use TLS 1.3 for connections to Sinch immediately.
Compliance Deadline:
In accordance with IMDA requirements, connections using TLS 1.2 for traffic to Singapore should not be supported after April 1, 2026. To avoid any possible interruption of service to Singapore, you must complete your transition before this date.
Our team is ready to help ensure your transition is smooth and seamless.
Please do not hesitate to contact our customer support or account manager if you have any questions or require assistance.
Nov 04, 2025 - 12:48 UTC
To ensure compliance and prevent any possible service disruption, all customers sending SMS traffic to Singapore must update their systems to support TLS 1.3 before this deadline.
Sinch Platform Readiness:
Our commitment is to provide a secure and resilient infrastructure.
We have already enabled full TLS 1.3 support across our global A2P SMSC infrastructure. The final site, EU3 (IP 93.158.78.4), will be fully compliant to TLS 1.3 by end of February 2026, well ahead of the deadline.
Required Customer Action:
Verify Your Configuration: We strongly urge you to begin transitioning your systems to use TLS 1.3 for connections to Sinch immediately.
Compliance Deadline:
In accordance with IMDA requirements, connections using TLS 1.2 for traffic to Singapore should not be supported after April 1, 2026. To avoid any possible interruption of service to Singapore, you must complete your transition before this date.
Our team is ready to help ensure your transition is smooth and seamless.
Please do not hesitate to contact our customer support or account manager if you have any questions or require assistance.
Nov 04, 2025 - 12:48 UTC
Sinch Scheduled Maintenance - UK5 Network Hub May 7, 2026 02:00-05:00 UTC
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: 2026-05-07 02:00 UTC
End time: 2026-05-07 05:00 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
Posted on Apr 17, 2026 - 12:00 UTC
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: 2026-05-07 02:00 UTC
End time: 2026-05-07 05:00 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
Posted on Apr 17, 2026 - 12:00 UTC
External Maintenance - Toll-Free Number Provider (US and CA) May 7, 2026 03:00-07:00 UTC
We are writing to inform you that our Toll-Free Number Provider (US and CA) will be performing planned maintenance at the times specified below:
Start Time: 2026-05-07 03:00 UTC
End Time: 2026-05-07 07:00 UTC
Impact SMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States and Canada.
Posted on Apr 14, 2026 - 09:42 UTC
Start Time: 2026-05-07 03:00 UTC
End Time: 2026-05-07 07:00 UTC
Impact SMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States and Canada.
Posted on Apr 14, 2026 - 09:42 UTC
External Maintenance - United States - T-Mobile May 8, 2026 04:00-13:00 UTC
T-Mobile USA has scheduled a maintenance.
Impact MMS: Clients may experience delayed or failed Short Code and 10DLC MT/MO traffic towards T-Mobile US
Maintenance Start time: 2026-05-08 04:00 UTC
Maintenance End time: 2026-05-08 13:00 UTC
Posted on May 06, 2026 - 00:58 UTC
Impact MMS: Clients may experience delayed or failed Short Code and 10DLC MT/MO traffic towards T-Mobile US
Maintenance Start time: 2026-05-08 04:00 UTC
Maintenance End time: 2026-05-08 13:00 UTC
Posted on May 06, 2026 - 00:58 UTC
Sinch Scheduled Maintenance - Elastic SIP Trunking - minor updates May 12, 2026 13:00-14:00 UTC
Sinch Elastic SIP Trunking will be deploying a software update to improve performance, and 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.
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/
Posted on May 05, 2026 - 05:19 UTC
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/
Posted on May 05, 2026 - 05:19 UTC
External Maintenance - Toll-Free Number Provider (US and CA) May 14, 2026 03:00-07:00 UTC
We are writing to inform you that our Toll-Free Number Provider (US and CA) will be performing planned maintenance at the times specified below:
Start Time: 2026-05-14 03:00 UTC
End Time: 2026-05-14 07:00 UTC
Impact SMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States and Canada.
Posted on Apr 14, 2026 - 10:01 UTC
Start Time: 2026-05-14 03:00 UTC
End Time: 2026-05-14 07:00 UTC
Impact SMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States and Canada.
Posted on Apr 14, 2026 - 10:01 UTC
Important Service Update: Action Required for Deactivation File Service May 14, 2026 15:00-16:00 UTC
Dear Client,
As part of our commitment to improving service performance and reliability, we are announcing an important update to our Deactivation File Service.
To ensure your service continues without interruption, it is essential that you update your systems to use the new endpoint before the change date.
Summary of Changes
We are decommissioning the FQDNs listed below and replacing them with a new, unified endpoint. This update also includes several enhancements to the service.
FQDN Status, FQDN, IP Address
To be Terminated, ftp01.sinch.com, N/A
To be Terminated, ftp01.clxnetworks.com, N/A
Replacement Endpoint, deact.prod.sinch.com, 184.169.203.194
Start Time
2026-05-14 15:00
Service Enhancements
The new endpoint introduces the following improvements:
Directory Structure: The Sprint directory has been removed, and a new Tier_2 directory has been added to house deactivation files from our tier 2 carrier connections.
File Naming Convention: The date in the file name will now reflect the day the service is run (e.g., deactivation_20250205.txt), rather than the previous day.
Expanded Data: Deactivation data from Verizon is now available through the new endpoint.
We recommend making these changes at your earliest convenience to ensure a seamless transition. Please let us know if you have any questions.
Posted on Apr 30, 2026 - 15:21 UTC
As part of our commitment to improving service performance and reliability, we are announcing an important update to our Deactivation File Service.
To ensure your service continues without interruption, it is essential that you update your systems to use the new endpoint before the change date.
Summary of Changes
We are decommissioning the FQDNs listed below and replacing them with a new, unified endpoint. This update also includes several enhancements to the service.
FQDN Status, FQDN, IP Address
To be Terminated, ftp01.sinch.com, N/A
To be Terminated, ftp01.clxnetworks.com, N/A
Replacement Endpoint, deact.prod.sinch.com, 184.169.203.194
Start Time
2026-05-14 15:00
Service Enhancements
The new endpoint introduces the following improvements:
Directory Structure: The Sprint directory has been removed, and a new Tier_2 directory has been added to house deactivation files from our tier 2 carrier connections.
File Naming Convention: The date in the file name will now reflect the day the service is run (e.g., deactivation_20250205.txt), rather than the previous day.
Expanded Data: Deactivation data from Verizon is now available through the new endpoint.
We recommend making these changes at your earliest convenience to ensure a seamless transition. Please let us know if you have any questions.
Posted on Apr 30, 2026 - 15:21 UTC
DI E-Mail 365 | Application Maintenance | PCR Number # PCRSDI-12203 May 17, 2026 02:00-05:00 UTC
Services :: DI E-Mail 365
PCR Number :: PCRSDI-12203
Start Date and Time (GMT):: 17th May 2026 02:00 UTC.
End Date and Time (GMT):: 17th May 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 retarus-aa (10%) ,reterus-us-aa(10%) ,retarus-status(10%) ,rest
(10%)
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.
Posted on May 05, 2026 - 14:17 UTC
PCR Number :: PCRSDI-12203
Start Date and Time (GMT):: 17th May 2026 02:00 UTC.
End Date and Time (GMT):: 17th May 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 retarus-aa (10%) ,reterus-us-aa(10%) ,retarus-status(10%) ,rest
(10%)
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.
Posted on May 05, 2026 - 14:17 UTC
External Maintenance - Toll-Free Number Provider (US and CA) May 21, 2026 03:00-07:00 UTC
We are writing to inform you that our Toll-Free Number Provider (US and CA) will be performing planned maintenance at the times specified below:
Start Time: 2026-05-21 03:00 UTC
End Time: 2026-05-21 07:00 UTC
Impact SMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States and Canada.
Posted on Apr 14, 2026 - 09:54 UTC
Start Time: 2026-05-21 03:00 UTC
End Time: 2026-05-21 07:00 UTC
Impact SMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States and Canada.
Posted on Apr 14, 2026 - 09:54 UTC
External Maintenance - Toll-Free Number Provider (US and CA) May 28, 2026 03:00-07:00 UTC
We are writing to inform you that our Toll-Free Number Provider (US and CA) will be performing planned maintenance at the times specified below:
Start Time: 2026-05-28 03:00 UTC
End Time: 2026-05-28 07:00 UTC
Impact SMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States and Canada.
Posted on Apr 14, 2026 - 10:07 UTC
Start Time: 2026-05-28 03:00 UTC
End Time: 2026-05-28 07:00 UTC
Impact SMS: Clients may experience delayed or failed Toll Free MT/MO traffic towards the United States and Canada.
Posted on Apr 14, 2026 - 10:07 UTC