Customer Service Cells Customer Service Cell is operated in the Area Office during working Hours/ days. This cell is backed up by an Officer and a telephone for responding / attending to Customer grievances/ suggestions/queries. Please select your state to know the customer service cell number of your nearest area office. State Select State Andhra Pradesh Bihar Chattisgarh Delhi Gujarat Haryana Himachal Pradesh J&K Jharkhand Karnataka Kerala Madhya Pradesh Maharashtra North East Integrated State Office Orissa Punjab Rajasthan Tamil Nadu Uttar Pradesh Zone I Uttar Pradesh Zone II West Bengal     © 2007 Indian Oil Corporation Limited. All rights reserved. Updated on July 27, 2012