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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
Important Updates

Standard Mail DSCF Load Leveling Final Rule Published in the Federal Register

The Postal Service has released its Federal Register final rule revising the service standards for Standard Mail that is eligible for Destination Sectional Center Facility (DSCF) rates. These changes will allow a more balanced distribution of DSCF Standard Mail across delivery days. With its new rules, USPS is extending delivery expectation to four days for mail entered on Friday and Saturday. National Implementation began April 10, 2014.

January 2014 Price Change Fact Sheets

Getting Started with Full-Service Intelligent Mail

PostalOne! Contingency Plan

For mailers unable to submit electronic information, click here for the PostalOne! Contingency Plan.


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