Here is a list of Top 25 Wired [ DSL / Cable / FTTH and Services in Unlicensed Wireless Spectrum 2.4 GHz+] Internet Broadband Service Providers in India along with their Subscriber Numbers at the end of Q1-2012. Data excludes EVDO Based Services which are il-legal.

BSNL 8,910,610
Bharti Airtel 1,359,817
MTNL 1,043,637
You Broadband 374,815
Hathway Cable & DataCom 359,928
Tikona Digital 276,891 [Wireless]
Beam Telecom / Cable 201,451
Reliance Communications 189,660
Tata Teleservices Maharashtra 111,128
Asianet Satellite 102,375
Quadrant Televentures / HFCL Infotel Broadband 101,008
Tata Communications / VSNL 97,719
Syscon Infoway 66,386
Sify Broadband 58,407
Ortel Communications 52,783
D-Vois Broadband 51,013
Five Network Solutions 45,010
broadband Pacenet 35,817
Spectra ISP Networks 32,540
In2Cable / IndusInd Media 28,118
Zylog Systems [Wi5 Broadband]
Chandra Net SPiDiGo Broadband - 26,796
Softeng computers 25,175
Gujarat Tele-link 17,733
Noida Software Technology Park 15,311