Large corporations, hospitals and government institutions generally run independent call center -- for example, the 311 number for the City of Chicago. Searching for the correct call center is often a matter of finding the contact section of a corporate webpage, looking on Yellowpages.com for a specific listing, or dialing 1-800-225-5288 (CALL-ATT) for operator assistance.
The 311 number for the City of Chicago is designed to put callers in touch with specific city programs and services. The call center processes nearly 4 million calls per year. Common uses include searches for police information, fire department information, library information, emergency assistance or sanitation information. The service can also be used to file complaints or to learn more about development programs taking place in the city. The City of Chicago website explains the call center and gives greater detail about the service.
The Chicago Tribune keeps a list of the 100 largest employers in the city of Chicago to help in the search for commercial call centers. Large companies use call centers to manage customer interactions. It is common for the first level of the conversation to be automated, although an operator can usually be reached by dialing zero.
YellowPages.com lists the contact information for a number of call centers operating in Chicago.