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Michigan State UniversityMichigan State UniversityInfrastructure Planning and Facilities

Dialing instructions

On-campus calls

Dial the last five digits of the telephone number from internal phone exchanges: 353, 355, 432 or 884 telephone numbers.

Effective on October 2017, users of the AT&T Legacy Centrex analog phone service will need to dial 8 + the full 7-digit number to reach on-campus numbers that they previously were able to reach with 5 digits. 

  • Phone Numbers with a first digit of 2 will need to be dialed as 8-432-xxxx.  For example, 2-1234 will need to be dialed as 8-432-1234
  • Phone Numbers with a first digit of 3 will need to be dialed as 8-353-xxxx.  For example, 3-1234 will need to be dialed as 8-353-1234
  • Phone Numbers with a first digit of 4 will need to be dialed as 8-884-xxxx.  For example, 4-1234 will need to be dialed as 8-884-1234
  • Phone Numbers with a first digit of 5 will need to be dialed as 8-353-xxxx.  For example, 5-1234 will need to be dialed as 8-355-1234

 Users affected by this will hear the message “You have reached a non-working number at Michigan State University” when they dial 5-digit numbers.

Off-campus calls

Note: Departments are charged for long-distance charges.

Local dialing

Dial 8, then the seven-digit telephone number. Includes East Lansing, Lansing, Bath, Dewitt, Dimondale, Eaton Rapids, Grand Ledge, Holt, Laingsburg, Mason, Perry, Potterville, Shaftsburg, Wacousta and Williamston.

Long-distance dialing

Dial 8 + 1 + (area code) + (seven-digit telephone number) for continental US and Canada

International dialing

Dial 8 + (international access code) + (country code) + (city code) + (local telephone number)

Use International dialing code online directory to search for country codes for long-distance dialing.

Toll-free number

Dial 8 + 1 + (800/866/877/888) + (seven-digit telephone number)

University Operator

Dial "0"

Personal long-distance calls

Personal long-distance calls should not be placed from campus phone numbers without approval.