What city and state uses the area code 311?

311 is not used as an area code, because it is reserved for non-emergency municipal services. Many areas in the US and Canada use it as an information line.

It has been used in the past as a fictitious area code in commercials, television shows, and movies, and was also used for testing by some companies. Most places that use it have switched over to using it for information now, and some also have 311 websites where people can ask questions rather than calling the number.