Good morning (well for me) @jsha & @LeonA , It was a mystery to me how I had 2 other sites with Netregistry and they had worked fine about 2 weeks ago and then this week my main domain would not! But I would say your guess “My guess is that something changed routing-wise, and this went from an “everyone” problem to a “sometimes” problem.” is spot on as my main domain vpscloud.biz and gone through fine this morning! Lets hope it will renew fine in the future!
Regards to all,
Mark.