To know DTH current balance

Airtel tv

https://pay.airtel.in/online-payments/dth-digital-tv-recharge.jsp

type customer id and email id then proceed

Sun tv

http://my.sundirect.in/Login.aspx
quick rechage >  smartcard id > submit

videocond2h

http://www.videocond2h.com/wsc/recharge.aspx
type customer id then click next