Some of the top advertising companies in India are as follows:

Oglivy and Mather, Mumbai
14 Floor, Oberai Gader, Western Experss Highway,
Goregaon East, Collerz International
Mumbai, Maharastra 400063
Tel no: 022 4436 0360 
http://www.ogilvyindia.com/home/index.asp

Mudra Communication Pvt. Ltd, Mumbai
Shree ran Mills Pvt. Ltd.
GK Marg
Worli, Mumbai - 400 013
Tel no: 91-22- 3047 0150
Fax no: 91-22- 2496 4702
http://www.mudra.com/

J Walter Thompson India, Haryana
Block A, Enkay Centre, Vanijya Nikunj Comm Complex, Phase-V
Udyog Vihar, Gurgaon, Haryana 122006
Tel no: 0124 4198330
http://www.jwt.com/

Lintas India Ltd, Kolkata
67b, Circular Road, Ballygunge,
Kolkata - 700019
West Bengal
Tel no: 033 - 22475970
Fax no: 22403814
http://lowelintasindia.com/ 

Leo Burnett India Pvt. Ltd , Mumbai
836, Big Apple
Dr. Shorodekar Road(Near Gandhi Hospital)
Parel
Mumbai -400012
Tel no: 022-66634444
http://www.leoburnett.com/

Grey Worldwide (I) Pvt. Ltd, Bangalore
4th Floor, Lakshmi Naranyan Complex, 10/1, Place Road, Vasantnagar,
560052 
Bangalore
Tel no: 4113 1002
www.greyworld.com

M M Connect, Bangalore
Old # 91
2nd Floor
1st Block, 2nd Cross, Jakkasandra Extension
Koramangala
Bangalore -560034
Tel no: 080-25530777
http://www.m-and-m.in/m.htm
E-mail id: connect@m-and-m.in

FCB-Ulka Advertising Ltd, New Delhi
Chandiwala Estate 3rd Floor, Kalkaji, New
Restaurant Blck, New Delhi, Delhi 110019
Tel no: 011 6656 4600
www.fcbulka.com