| Cadbury 1800227080 |
| Cadbury India 1800227080 |
| Cadence 18001024911 |
| Call 2 Connect India 1800113377 |
| Cambay 18002335566 (Customer Care), 18002336655 (Central Reservatio |
| Cambay Tours 180030027777 |
| CAMS – 1800 44 2267 |
| Canadian Institute for International Studies 18001802007 |
| Canara Bank 18004251906 18004256000 (ATM) 18004252470 (Cancard) 18004250018 1800446000 |
| Canara Robeco 18002092726 |
| Canara Robeco MF 18004250018 |
| Canon – 1800 333 366 18001803366 |
| Canova Homeopathic 18002334554 |
| Canvera Digital Technologies 18004257436 |
| Carsteering.com 18003997845 |
| CaratLane 18001020103 |
| Caravan 18001038880 |
| Caravan Packers N Movers 1800 103 1177 |
| Career Launcher 18001021700 |
| Careersuniverse 18004252215 |
| CaretLane 18001020103 |
| Carrefour 18002092500 |
| Carrier 180030111111/31211111 |
| Carzonrent 1800111212 |
| Cash Tree 18004251112 |
| Cashnet India 1800225087 |
| Castrol India 1800222100 |
| CAT IIM 18001037383 |
| Cathay Pacific 18002091616 |
| Ceasefire 1800113473 |
| Celebrate Life 18001022220 |
| Cellucom 18001807742 |
| Central Bank of India 1800222368 18002001911 |
| Central Board of Secondary Education (CBSE) 18002096030 1800117002 |
| Central Institute of Psychiatry (CIP), Ranchi 18003451849 |
| Centum U 18001034457 |
| Centurion Bank of Punjab 18001023333 |
| Cera 18002001801 |
| Certin 1800114949 |
| CES Onyx 18003454466 |
| CFA Institute 18004254361 |
| Charak 1800229487 |
| Chayagraphics (India) 18004252477 |
| ChipSilicon.com 18002092131 |
| Chirag [R.P. Infosystems ] 18003456365 |
| Choice Hotels India 1800117117 |
| Chola MS General Insurance – 1800 44 5544 180042555444 |
| Chola Mutual Fund – 1800 22 2300 18004254455 |
| ChristianMatrimony.com 180030002222 |
| Cisco Systems – 1800 221 777 |
| Citi financial 1800229050 |
| Citibank – 1800442625 1800 44 2265 18004253364(mediclaim) Kanpur 18001802484 |
| Citibank ombudsman 18004194357 (HELP) |
| CitiBusiness 18001800123 |
| Citrix 18004258065, 18004252489, 18001022489 |
| Clay Telecom 18001021113 |
| Clean & Clear 1800228111 |
| Cleartrip 1800225327, 18002701000 1860 233 9000 |
| Clinical Research Education And Management Academy (CREMA) 18002093731 |
| Clinck Cyber Café Manager 1800 209 1911 |
| Club Mahindra Holidays – 1800 33 4539 18004254539 (HLDY) |
| CMC Limited 1800118787 |
| CMS Computer Institute 1800220027 |
| CMS Kanpur 18004190107 |
| Coca Cola India 18001802653 |
| Coimbatore Capital 18004250506 |
| Colgate 1800225599 |
| Colgate Dentist 18002094666 |
| Colgate Max Fresh 18004686502 |
| Colgate Max Fresh Wakeup Your Star IPL Contest 18002700888 |
| ColorPlus 18004191100 |
| Colston De Banos 1800110789 |
| Commercial Tax Commissioner UP 18001805223 |
| Commonwealth Games 2010 18002001294, 18001021294 |
| CommVault 18004252951 |
| Compaq – HP – 1800 444 999 18004254999 |
| Computer Association (CA) India 18004259393 |
| Connect Gaia 18001804242 (GAIA) |
| Convergys 18001802000 |
| Cordia LT 18001805555 |
| Core Centre 18001804566 |
| Corelle Light 18002097309 |
| Cornitos 18001020200 |
| Corporation Bank – 1800443555 |
| Cosmopolitan 18001800100 |
| Cotton Corporation of India 1800224647 |
| Country Inn & Suites 18001800456 |
| Country Vacations India 18004256644 |
| Cox & Kings 1800221235, 18002090400 |
| CPP India 18004194000 |
| Crabtree 1800110303 |
| Credila Financial Services 18002093636 |
| CRI Pumps 18002001234 |
| Crime Stoppers 18004255333 |
| Crompton Greaves 18004190505 |
| Crowne Plaza 1800111000 |
| Cruise Norway 18003453324 |
| Cryobanks International India 18001022796, 18001801217 |
| Cummins 18002332000 |
| CyberKnife 18001026626, 18004256626, 1800116626 |
| CyberMedia Dice 18004251110 |
| Cyberoam 180030100013 |
