Although I am not a user of Airtel Broadband, but I would like to point out the unethical business practice that Airtel is following. It is redirecting all the mistyped domain names to their own page which shows advertisements in collaboration with Yahoo!.

Thus, if you are using Airtel’s DNS servers then you would see that a wrongly typed domain name such as www.sdkajhdjkashdajdkhausd.com (I hope that does not exist ;) ) will take you to a Airtel page which shows advertisements.

Why Unethical?
Now, this is a very unethical practice as the customers are mislead into believing that these are search results. Moreover, Airtel is benefiting from a such a service which is not giving any “benefit” to the user.

Precedence
There was a case filed against Verisign some time back and they were sued for it. They were successfully barred from using this kind of an unethical practice.

Here is an excerpt from the suit against Verisign:

“VeriSign’s redirection of .com and .net traffic not only is earning, or is intended to earn, profits for VeriSign, but it subverts the basic infrastructure of the Internet, to the detriment of numerous entities,” the suit says.

How to Prevent Airtel
The only way to prevent Airtel from hijacking your typos is to use OpenDNS DNS servers which are not only really fast but also are also more reliable. (If that went above the head, then just go to OpenDNS website: OpenDNS