As part of an infrastructure upgrade our fixed IP addresses for requests from our German data center will be changing.

We do not have a firm date for the switch yet, but wanted to provide notice of it as soon as possible.

The current IP address list is:

18.195.44.56
18.197.18.191
18.197.210.216
35.156.131.241

On, or after, February 28th, traffic will start coming from the following IP addresses:

54.93.34.174
3.121.21.226
3.122.2.191

Therefore, we advise anyone relying on fixed IP addresses to whitelist all seven addresses as soon as possible to avoid any disruption to their calendar connections.

We have been able to determine calendars we believe to be relying on the existing fixed IPs and will be in touch with the related customers individually.

Once the current IP addresses are out of service we will create a separate maintenance notification to confirm that they can be removed.
Posted on Feb 14, 13:53 GMT