Why DNS Propagation Takes So Long?

Posted on 23 March 2011

After getting your domain name registered, paying off to your web host to get hosting for your website, and uploading your website on the web server, its time to view the final shape of your website. If you cannot view your website after all this hard work then does it mean it that you are missing something or is it just something with DNS propagation?

dns propogation

Understanding DNS Propagation

Before understanding the DNS propagation, you should be aware of the working of DNS. A master DNS is created by your web hosting provider in the event when you set your website up with it. This Master DNS is recorded in the Domain Name Server of your web hosting provider. The company which registers your domain name contacts to the DNS server of your web hosting provider. Your domain name registrar does it as the master authority of your domain which you have registered with it.

How Your Website is Being Searched?

When an outsider source searches your website, it first switches to the registration database in order to find out about the DNS authority of your website. After then that it goes to the DNS sever of your web hosting service provider in order to find out the IP address of your website’s domain name. From this IP address, this outsider source locates your website and can view your website.

Caching the DNS Records

The only problem with this searching process is that when your website is searched on internet by an outside source, the search process is catalyzed, as every ISP caches it DNS records to display your website in quick time.

It simply means that each Internet Service Provider creates its own copy of the Master DNS records and then it reads this copy on local host instead of reading it on the Internet. This process is repeated every time when any outside sources searches your website. This entire process catalyzes the web surfing time of your website by two ways:

dns records

1 – By speeding up the returning time which is taken for a browser to find out a domain and get a quick answer.

2 – It reduces the amount of incoming traffic on the web which enables it to work even more quickly.

Disadvantage of Caching Process

The drawback of caching process which makes the website visibility longer than normal is the DNS record caching process of each Internet Service Provider, as each ISP updates it for only few days. However, the updating time is totally dependent on the ISP which can set it acceding to their wish. The slow updating process of the server caches is regarded as the DNS propagation. The normal timings for DNS propagation are from 36 hours to 72 hours.



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One Response to “Why DNS Propagation Takes So Long?”

  1. Thanks for the info, I was wondering why it took so long to propagate through the internet. It took my site about 50 or so hours to show up.


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