How long are the records updated in DNS? I noticed that when you change the type A or CNAME records, sometimes it takes up to a day, depending on where they are checked from? Is there an upper time limit?
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2 answers
There is no upper time and, in principle, cannot be due to the distributed organization of DNS servers. Just imagine that the server, where the changed data was laid down, did not have time to update the information on the neighbors. At the minimum time - something in the area of a few hours.
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The update time depends on the TTL (Time to Live) parameter, which determines the freshness of data when caching queries. This parameter is usually set per day, but in general it can vary widely.
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