As per your demand the contact address of the Indian Space Research Organisation as under:

About

The Indian Space Research Organisation is the space organization of the Indian government headquartered in the city of Bengaluru.
Established in 15 August 1969

Contact address

Indian Space Research Organisation
Director, P&PR Unit, ISRO Hqs
Antariksh Bhavan, New BEL Road
Bangalore-560 231
Phone:+91 80 23415275 or 22172296
Fax: +91 80 23412253
Email: dir.ppr@isro.gov.in

For Public Grievance and Complaints
Joint Secretary, DOS
Public Grievances Officer & Chief Vigilance Officer
Department of Space
Antariksh Bhavan, New BEL Road
Bangalore-560 231
Phone:+91 23416393 or 22172303
Fax: +91 80 23511829
Email: vijayanand@isro.gov.in
Department of Space, Phone : 00 91
Fax: 00 91

For Satellite Data Products

NRSC Data Centre [NDC],
National Remote Sensing Centre,
Department of Space
Government of India
Balanagar, Hyderabad-500 037
Phone:+91 040 23878560 or 23884422
Fax: +91040 23884424
Email: sales@nrsc.gov.in

For

Sub-systems and components for satellites
Orders for satellites to user's specifications
Launch services and tracking facilities

Managing Director
ANTRIX Corporation Ltd.
Antariksh Bhavan, New BEL Road
Bangalore-560 231
Phone:+91 080 22178302
Fax: 080 22178341
EMail: ed@antrix.gov.in