As previously communicated, our data will be migrating from KPN to the hosting environment of Shock Media B.V. as of May 15, 2026. Although the data will remain in the Netherlands, this move involves new public IP addresses. This change will be implemented during the update scheduled between May 15 and May 18. The final list of IP addresses is now available.
Action is required if you:
Use sender email services where emails are sent via your own domain name using the SMTP protocol for authentication, and IP whitelisting is applied;
Use an integration between ValidSign and an on-premise application (which requires IP whitelisting for sending transactions or receiving callbacks);
If your integration is managed by a third-party provider (cloud application), please forward this email to them.
No action is required if:
The situations mentioned above do not apply to your organization.
Are you unsure? Please contact your IT department. If they are unable to provide an answer, you can email us at support@validsign.eu so we can verify your configuration.
Overview of Changes
Below you will find an overview of the current and new IP addresses:
ValidSign Production Environment (https://my.validsign.eu)
Incoming traffic to ValidSign (API requests):
-
Current
IPv4: 194.151.209.200 -
New
IPv4: 31.7.0.185
IPv4: 31.7.6.26
IPv4: 185.144.224.29
IPv6: 2a03:9700:8000:1::36
IPv6: 2a03:9700:8000:1::37
IPv6: 2a03:9700:8000:1::39
ValidSign Try Environment (https://try.validsign.eu)
Incoming traffic to ValidSign (API requests):
-
New
IPv4: 31.7.6.7
IPv4: 185.144.224.18
IPv4: 31.7.0.130
IPv6: 2a03:9700:8000:1::33
IPv6: 2a03:9700:8000:1::34
IPv6: 2a03:9700:8000:1::35
Outgoing traffic from ValidSign (SMTP and Callbacks):
-
Current
IPv4: 194.151.187.225 -
New
IPv4: 31.7.1.188
IPv6: 2a03:9700:8000:1:0:0:0:31
ValidSign Callback Manager (https://callback.validsign.nl)
-
Current
IPv4: 194.151.187.225 -
New
IPv4: 31.7.1.188
IPv6: 2a03:9700:8000:1:0:0:0:31
Take Timely Action
We advise you to implement these changes promptly to avoid any issues with accessing our services. Do you require technical assistance? Please contact our support department at support@validsign.eu.
Note: The IP addresses for our acceptance environment will change at a later date and will be added to this article.