When changing the nameservers for a domain, will there ever be a time in which it points to neither the old nameservers nor the new nameservers? If so, why does this occur?
For a little context, the reason I ask is because I just did this, the A-record and nameservers are coming up correctly when I get the DNS info, I verified the site on the new server AND the old server was running by adding them to my local machine's hosts file, but I got a "site not found" error in Chrome for about an hour before it came up correctly. (meaning, SOMETHING changed, but why didn't it just change immediately to the new nameservers?)