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IMb Tracing is a FREE service that provides real-time tracking information for your automation-compatible letters and flats.

To learn more or get started with IMb Tracing, see the IMb Tracing Fact Sheet and IMb Tracing User Guide (under the Important Links section of this page) or contact our customer support center (contact information below).


Contact Information:

  • National Customer Support Center
  • IMb Tracing
  • 225 N. Humphreys Blvd, Ste 501
  • Memphis, TN 38188-1001
  • Phone: 800-238-3150
  • Email: IMbTracing@USPS.GOV
  • Page updated: 03/28/2012


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