Sorry about just hopping in, but eyes starting to glaze over.
We recently were updated (new hosting account from legacy one) by TMD Hosting. They provided me with a list of NS (4).
I am looking for a place to update on CF, but can't find. Now all sites are getting 503 errors (there has been a change) but since the sites were mirrored to transition them, I am thinking the biggest change are the name server info.