The study shows that daily, approximately 547200 new websites are created globally. Today, on the internet, millions of websites are hosted and managed on the servers.
Each device that is on the internet has an IP address. Through which it is identified on the internet. To search the website where it is currently hosted and managed. It would be best if you have a proper directory. Without structured data, it would be virtually impossible to find a specific website on the internet world.
DNS (Domain Name System) is the largest global database on the internet. It is like a phone book. The domain name and IP address are stored in the database.
When you write any website URL on the browser, its DNS information is stored in the browser cache. Your ISP also caches the DNS information of the website in its server.
The primary purpose of storing the DNS records in its cache is to improve the DNS query's performance. Each DNS record has a TTL (Time to Live) value. The time for which the server cache the DNS records in its storage.
When the website is moved from one host to another and its IP changes, the DNS continues to work formally and receives the information from the cache stored until the time passes.
The DNS servers require 24 to 48 hours to propagate correctly to update their cached data for the domain.
The Google servers and the top CDN services, like Cloudflare, servers propagate correctly, within no time. However, many other DNS servers require a lot more time to update the cached information about the domain. Moreover, it depends upon their TTL value. Therefore, averagely takes 24 to 48 hours to propagate fully.
Tip: Change TTL of a DNS record to the lowest value 48 hours before changing IP in a DNS record. Reducing TTL will fast track the process of DNS resolution.