In mid-October, we moved to a different server facility. You probably didn't notice a thing, as the whole move we carefully orchestrated and downtime was minimal.
The move to the new facility did require us to change our primary IP address, however. For the next couple weeks, both the old and the new IP addresses will work.
If you are using our old IP address of 18.104.22.168 in your DNS setup, you must make a small change or your site will stop working in a few weeks!
In general, you can avoid using a numeric IP address at all, providing immunity from any future changes, by following the instructions here:
In some cases, you may need to use our new IP address, which is 22.214.171.124. But please DO NOT USE THIS IP ADDRESS unless you cannot follow the preferred approach described in the article listed above.