Earlier today, I needed to change my “A” Record. Not unexpectedly, later in the day when I check the propagation on a DNS Checker site, some areas/servers still have the old record. However, I don’t understand this: about 6 servers say “Not Resolved.” The servers are not down or anything; if I test with other domains they resolve. I know I have to wait longer for everything to propagate, but WHY are some servers showing “Not Resolved” instead of the previous IP address?
That is a genuinely helpful and informative article, thank you! However, what I’m missing is that all the Domin Servers in the online DNS tool I’m using had the previous A Record resolved before. After I changed the A record, during propagation (as described in that article), some that haven’t propagated yet still contain the old value. THAT I understand. But, what would cause some servers to simply say “Not Resolved” instead of having the old value? If I’m missing something obvious, my apologies.
This is expected. Due to the way how internet works, the dns resolvers are not all updated at the same time. If resolver is down, “not resolved” is a possible scenario.
Thanks so much! Got it!
P.S. You derve a pay-raise!
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