Planned Maintenance - REST API
Scheduled Maintenance Report for Sinch
The scheduled maintenance has been completed.
Posted Feb 11, 2021 - 09:00 UTC
In progress
Scheduled maintenance is currently in progress. We will provide updates as necessary.
Posted Feb 11, 2021 - 08:01 UTC
We will be undergoing scheduled maintenance during this time.
Posted Jan 27, 2021 - 16:34 UTC
Dear Client,

This maintenance has been postponed until the 11th of February.

As part of our continuous improvements to our platform, we will be moving our REST API end point to a new set of load balancers.
This will only impact clients that have IP whitelisting in place for our IPs connecting to

The maintenance is scheduled below:
Type: Scheduled Maintenance
Maintenance: REST API

Start Time: 2021-02-11 08:00 UTC
End Time: 2021-02-11 09:00 UTC

Impact MT: No expected impact
Impact DR: No expected impact
Impact MO: No expected impact
FQDNs being moved:

Additional IP Addresses to be added:
• Clients connecting to Sinch:,
• Clients accepting DR’s or MO’s from Sinch: No Change Needed.

Please add the additional IP Addresses to the whitelisting (or any IP rules) on your outbound message flows that may prevent your platform from sending messages to Sinch.

Please ignore the maintenance if your application/organization uses FQDN’s and do not use our IP’s in your API configurations, IP whitelisting or firewall rules for your outbound traffic to our platform.

If you reach our API platform via an IPSec VPN tunnel, this change will not impact you.
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 should you require further information or assistance.

(Formerly CLX Communications)
Posted Jan 15, 2021 - 20:35 UTC
This scheduled maintenance affected: Messaging API - US (REST).