The DNS propagation delay is the delay in propagating the changes that you have made either on a domain’s DNS Zone record on the server or at the nameserver settings on the domain registrar control panel. Whenever you update the DNS settings on the server, it requires a certain time for gettings in these changes reflected all over the internet and you have to give it time. There is essentially nothing we can do to increase this time as the factors affecting the propagation are not under our control. However, we can follow certain steps to maximize the speed of propagation time. The following are the factors that affect the DNS propagation.
1) TTL Value:
TTL Value is the Time to Live value or the caching time of the DNS zone record. This is the time interval for your authoritative nameservers to check and synchronize the zone record. By default the value will be set to high which you can reduce to a minimum value so that syncing process will take place sooner. After every successful edit, the serial number of the ZOA will be updated.
1) Login to WHM.
2) Open Edit DNS Zone.
3) Select the domain. Edit as mentioned below.
2) ISP Caching Rate.
The Caching technique is used to reduce the serving time of data from the servers. ISP cache works similar to browser cache, in the ISP caches all the websites you visit and the next time you access it, it will be loaded from the ISP cache instead from servers which are physically located thousands of Miles away from you. The ISP cache rate is the time it takes for the ISP to refresh the copies of files from the server. This process happens only when the ISP cache is expired. In most of the ISPs, the caching rate is more than an hour and in some ISPs it is very high. It depends on the policy the ISP follows. There is so little or infact, nothing we can do about it.
3) Zone refresh rate:
Whenever the nameservers are changed in the domain registry(at the domain registrar control panel) like in the case of ISP caching, they publish your authoritative NS (nameserver) records to their root zone. Most of the registries do not allow frequent changes to their root nameservers and they protect it by keeping a TTL value which is upto 48 hours.
Normally, a change made in the DNS Zone record on the server takes any time between 0-4 hours to complete and all the nameserver change at registrar would take around 0-24 hours to complete. The time can change depending on the factors we have discussed above.
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