DI SMS 365 (SMSx) | Operator Services | Potential delay in delivery of MO, MT and DR | TT#MNOC-63424
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Monitoring - A fix has been implemented and we are monitoring the results.
Mar 08, 2026 - 01:07 UTC
Mar 08, 2026 - 01:07 UTC
Update - We are still continuing to investigate this issue. We will provide update as more information becomes available.
Mar 07, 2026 - 22:32 UTC
Mar 07, 2026 - 22:32 UTC
Update - We are continuing to investigate this issue.
Mar 07, 2026 - 20:20 UTC
Mar 07, 2026 - 20:20 UTC
Update - Our technical teams are actively working to identify the root cause and implement a resolution as quickly as possible. We will continue to provide updates as more information becomes available.
Mar 07, 2026 - 20:09 UTC
Mar 07, 2026 - 20:09 UTC
Investigating - Ticket Number :: MNOC-63424
Services:: DI MMS 365 - SMSx
Description :: Monitoring NOC is observing potential delay in delivery of messages. 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
Incident Start Date & Time (GMT) : 07th Mar 2026, 18:56 hrs
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.
Mar 07, 2026 - 19:14 UTC
Services:: DI MMS 365 - SMSx
Description :: Monitoring NOC is observing potential delay in delivery of messages. 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
Incident Start Date & Time (GMT) : 07th Mar 2026, 18:56 hrs
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.
Mar 07, 2026 - 19:14 UTC
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Scheduled Maintenance
Sinch Maintenance - AT&T US 10DLC Mar 12, 2026 15:00-16:00 UTC
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 brief delay during delivery for 10DLC Numbers sending to AT&T US Devices.
Start Time: 2026-03-12 15:00 UTC
End Time: 2026-03-12 16:00 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 Feb 26, 2026 - 16:55 UTC
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 brief delay during delivery for 10DLC Numbers sending to AT&T US Devices.
Start Time: 2026-03-12 15:00 UTC
End Time: 2026-03-12 16:00 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 Feb 26, 2026 - 16:55 UTC
External Maintenance - SMS and MMS Mar 13, 2026 04:00-10:00 UTC
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: 2026-03-13 04:00 UTC
Maintenance End Time: 2026-03-13 10:00 UTC
Posted on Mar 03, 2026 - 11:59 UTC
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: 2026-03-13 04:00 UTC
Maintenance End Time: 2026-03-13 10:00 UTC
Posted on Mar 03, 2026 - 11:59 UTC
DI E-Mail 365 | Application Maintenance | PCR Number # PCRSDI-12129 Mar 15, 2026 02:00-04:00 UTC
Services :: DI E-Mail 365
PCR Number :: PCRSDI-12129
Start Date and Time (GMT):: 15th Mar 2026 02:00 UTC.
End Date and Time (GMT):: 15th Mar 2026 04:00 UTC.
Description:
Email365 – crowdstrike sensor updates for multiple email modules .
This update is to upgrade crowdstrike sensors on host servers .
Zero/No impact on traffic .
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 Mar 03, 2026 - 16:47 UTC
PCR Number :: PCRSDI-12129
Start Date and Time (GMT):: 15th Mar 2026 02:00 UTC.
End Date and Time (GMT):: 15th Mar 2026 04:00 UTC.
Description:
Email365 – crowdstrike sensor updates for multiple email modules .
This update is to upgrade crowdstrike sensors on host servers .
Zero/No impact on traffic .
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 Mar 03, 2026 - 16:47 UTC
Sinch Emergency Maintenance - EU3 Mar 16, 2026 21:00 - Mar 17, 2026 03:00 UTC
We will perform an emergency network maintenance on our EU3 Site during the below window.
Type: Emergency Maintenance
Start Time: 2026-03-16 21:00
End Time: 2026-03-17 03:00
Impact: Customers may experience multiple brief connectivity issues but will be able to reconnect immediately towards the impacted endpoints listed below.
Impacted endpoints:
eu3.smpp.api.sinch.com
eu3.httpsms.api.sinch.com
eu3.httplookup.api.sinch.com
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
We appreciate your patience and apologize for any inconvenience cause during this period.
Please contact support@sinch.com if you have any questions or concerns
Posted on Mar 10, 2026 - 13:01 UTC
Type: Emergency Maintenance
Start Time: 2026-03-16 21:00
End Time: 2026-03-17 03:00
Impact: Customers may experience multiple brief connectivity issues but will be able to reconnect immediately towards the impacted endpoints listed below.
Impacted endpoints:
eu3.smpp.api.sinch.com
eu3.httpsms.api.sinch.com
eu3.httplookup.api.sinch.com
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
We appreciate your patience and apologize for any inconvenience cause during this period.
Please contact support@sinch.com if you have any questions or concerns
Posted on Mar 10, 2026 - 13:01 UTC
External Maintenance - United Kingdom 3 UK Mar 17, 2026 21:00 - Mar 18, 2026 05:00 UTC
Update -
We will be undergoing scheduled maintenance during this time.
Mar 10, 2026 - 13:10 UTC
Mar 10, 2026 - 13:10 UTC
Scheduled -
United Kingdom 3 UK has scheduled a maintenance.
Impact: Clients may experience delayed or failed MT/MO traffic towards the United Kingdom 3 UK.
Maintenance start time: 2026-03-17 21.00 UTC
Maintenance end time: 2026-03-18 05.00 UTC
Mar 18, 2026 - 13:09 UTC
Impact: Clients may experience delayed or failed MT/MO traffic towards the United Kingdom 3 UK.
Maintenance start time: 2026-03-17 21.00 UTC
Maintenance end time: 2026-03-18 05.00 UTC
Mar 18, 2026 - 13:09 UTC
Planned Maintenance - MMS Mar 19, 2026 09:00-09:15 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: 2026-03-19 09:00 UTC
End Time: 2026-03-19 09:15 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.
Posted on Mar 05, 2026 - 15:47 UTC
Type: Maintenance - MMS
Start Time: 2026-03-19 09:00 UTC
End Time: 2026-03-19 09:15 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.
Posted on Mar 05, 2026 - 15:47 UTC
Sinch Maintenance - EU4 Network Hub Mar 24, 2026 02:00-05:00 UTC
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 EU4 site on the schedule below.
Type: Network Maintenance
Start Time: March 24th, 2026 02:00 UTC
End Time: March 24th, 2026 05:00 UTC
Affected Site: EU4
Impact: Clients may experience delays for MT and MO to and from the following operators for up to 15 minutes during the maintenance window.
Orange France
Eir Ireland
Plus Poland
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 Mar 09, 2026 - 15:38 UTC
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 EU4 site on the schedule below.
Type: Network Maintenance
Start Time: March 24th, 2026 02:00 UTC
End Time: March 24th, 2026 05:00 UTC
Affected Site: EU4
Impact: Clients may experience delays for MT and MO to and from the following operators for up to 15 minutes during the maintenance window.
Orange France
Eir Ireland
Plus Poland
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 Mar 09, 2026 - 15:38 UTC
Sinch Maintenance - Conversation API Mar 25, 2026 08:00-10:00 UTC
We will be performing a planned maintenance on our Conversation API platform to strengthen our infrastructure. This will change the IPs associated with the Base URL of our regional endpoints.
Type: Planned Maintenance
Start Time: 2026-03-25 08:00 UTC
End Time: 2026-03-25 10:00 UTC
For EU1 environment and "eu.conversation.api.sinch.com" FQDN IPs will change
from OLD:
- 34.246.12.78
- 52.18.1.217
- 52.50.172.104
to NEW:
- 34.247.10.251
- 34.243.80.241
- 63.33.21.26
For BR1 environment and "br.conversation.api.sinch.com " FQDN IPs will change
from OLD:
- 177.71.243.105
- 18.228.234.250
- 18.229.82.177
to NEW:
- 18.229.217.42
- 18.230.233.81
- 54.94.159.24
For US1 environment and "us.conversation.api.sinch.com " FQDN IPs will change
from OLD:
- 44.196.133.251
- 52.201.9.233
- 54.243.120.247
to NEW:
- 52.22.60.183
- 52.71.26.226
- 44.221.23.197
IMPORTANT!
If you have implemented IP whitelisting (allowlisting) rules on your network or firewalls that restrict outbound traffic to specific Sinch IP addresses, you must update your firewall rules and/or connection configuration to include the new IP addresses before the above mentioned window.
If you have any questions please do not hesitate to reach out to support@sinch.com
Posted on Mar 05, 2026 - 16:06 UTC
Type: Planned Maintenance
Start Time: 2026-03-25 08:00 UTC
End Time: 2026-03-25 10:00 UTC
For EU1 environment and "eu.conversation.api.sinch.com" FQDN IPs will change
from OLD:
- 34.246.12.78
- 52.18.1.217
- 52.50.172.104
to NEW:
- 34.247.10.251
- 34.243.80.241
- 63.33.21.26
For BR1 environment and "br.conversation.api.sinch.com " FQDN IPs will change
from OLD:
- 177.71.243.105
- 18.228.234.250
- 18.229.82.177
to NEW:
- 18.229.217.42
- 18.230.233.81
- 54.94.159.24
For US1 environment and "us.conversation.api.sinch.com " FQDN IPs will change
from OLD:
- 44.196.133.251
- 52.201.9.233
- 54.243.120.247
to NEW:
- 52.22.60.183
- 52.71.26.226
- 44.221.23.197
IMPORTANT!
If you have implemented IP whitelisting (allowlisting) rules on your network or firewalls that restrict outbound traffic to specific Sinch IP addresses, you must update your firewall rules and/or connection configuration to include the new IP addresses before the above mentioned window.
If you have any questions please do not hesitate to reach out to support@sinch.com
Posted on Mar 05, 2026 - 16:06 UTC
Singapore Regulatory Compliance Maintenance - A2P SMS APIs - TLS 1.3 Requirement Apr 1, 2026 00:00-01:00 UTC
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.
Posted on 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.
Posted on Nov 04, 2025 - 12:48 UTC
Sinch Internal Maintenance - SSL Certificate Update Apr 7, 2026 01:00-03:00 UTC
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
Posted on Feb 18, 2026 - 20:27 UTC
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
Posted on Feb 18, 2026 - 20:27 UTC
