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Michigan State University University Services

Campus ZIP+4 Codes

The U.S. Postal Service has asked the campus to refrain from using ZIP+4 codes since they change frequently and rather than one ZIP+4 per building, there may be many. USPS has indicated that all mail will be delivered correctly without using the 4-digit codes and it is not necessary to include it on letterhead, business cards, or envelopes. However, some units need the ZIP+4 when performing the day-to-day business operations of the university.

Users can look up the full zip code at the USPS website to determine a ZIP+4. A list of Frequently Asked Questions regarding the MSU Campus Addressing Project can be viewed here.