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ITS Networking & Telecommunications

How to Determine Your Local Calling Area

With the rapid addition of new area codes and telephone prefixes, it's getting harder to tell if a number is a local call for you or a toll call. The rapid increase of cell phone utilization has made this even more complicated. More and more people are dialing phone numbers that they think are local, only find out later—when they receive their bill—that they were toll calls.

If you'd like to avoid these "surprises" on your phone bill, you need to know before you place a call if it is a local or toll call for you. These pages provide the telephone exchanges under the local area codes for each of the three campuses.

A telephone call made from any U-M campus telephone on the Ann Arbor, Dearborn or Flint campus to an Ann Arbor, Dearborn or Flint campus local calling area is charged as a local call.

Telephone calls made from Ann Arbor campus (non-student) telephones to Ann Arbor local calling area numbers are charged as local calls. There is no charge for telephone calls made from Ann Arbor campus student telephones to Ann Arbor local calling area numbers.

Local Calling Areas by Campus

Caller ID Display Information for All U-M Outbound Calls

UM-Ann Arbor campus phones to:
Any number: Univ of Mich 734-647-0000
UM-Dearborn campus phones to:
Any number: U of M Dearborn 313-593-5600
UM-Flint campus phones to:
Any number: U of M Flint 810-766-6600