In order to have a more convenient, easy and effective way to enable the customer to air their complaints and follow up on such complaints, IOC has started the service of using unique toll free numbers for the complaint registration through call centers from 2nd October 2008. Across the country IOC has a unique number 18002333555, easy for the customers to remember .
The call centers are operated region wise to facilitate the customers to lodge complaints in local language. Customers are given a registration number and those wish to know about the status of the complaints can call up the call centers in the same toll free numbers.
The complaint lodging is in a manual mode for 8am to 8 pm and an IVRS mode during 8pm to 8 am.