The default gateway for your BSNL Dataone / Airtel / Tata Indicom broadband connection is
192.168.1.1
or
192.168.1.2
However, at times it may be different depending on variation in installation process. Simplest way to find the Default Gateway of your system is to run the ipconfig /all command in command prompt. Here’s step by step process to find
1> Click start –> Run –> cmd and enter
2> type ipcofig /all and enter
This will list the IP configuration details, which will include your DNS IP and your Default Gateway.