We are starting to replace most of the devices that send out Web Checks (https://support.serverdensity.com/hc/en-us/articles/201254073
The first replacement even will start next Tuesday at 09:00 UTC and is schedule to take approximately 2 hours.
The devices getting replaced during this period are:
* USA, San Jose
To prevent customers from having to adjust their code, only the IPs will change, not the API location name. We will be updating https://support.serverdensity.com/hc/en-us/articles/201091476