On Mon, Mar 14, 2022 at 06:58:12PM +0000, Mark Rogers wrote:
My question: If the time between (a) and (b) can be reduced to almost zero (such as by making both changes in a single hit via an API), I assumed that there'd (almost certainly) never be an incorrect DNS response given and therefore no propagation delays should apply. However the company in question told me that there would still be a propagation delay but disappeared from the chat when I asked where.
They're wrong or bad providers, there's a couple of ways of doing this.
The one I'm doing at the moment is I'm setting up a zone in the new provider which matches the records in the current provider and then I'm going to update the NS records so that they point to the new provider. Once this is done you can transfer the domain and tidy up any leftovers after.
There is another way where you can mix and match your NS records and setup one of the providers to be a secondary of the other so records will be copied. Then transfer the domain and tidy up the NS records and make the new provider the primary.
If the new provider can't setup a zone before you transfer the domain then I'd suggest you don't use them.
Adam --