• 12/29/2025

    Labeling List Changes Effective February 1, 2026

    Effective February 1, 2026, the Postal Service™ will revise Labeling List(s) L002, L005, L012, L016, L051, L201, and L606 to reflect changes in mail processing operations. Mailers are expected to label according to these revised lists for mailings inducted on or after the February 1, 2026, effective date through March 31, 2026, expiration date. The changes will be published in the Postal Bulletin, Issue #22694.

    • Announcements
    12/26/2025
    DELIVERY - Wrightwood Post Office (92397) - Temporarily Closed
    Announcements
    12/26/2025
    DELIVERY - Lytle Creek Post Office (92358) - Temporarily Closed
    Announcements
    12/23/2025
    INFORMATIONAL - USPS APIs System Maintenance January 14, 2026
    Release Notes
    12/22/2025
    PTR2 Release Notes_DD_01_10_26
    Announcements
    12/22/2025
    INFORMATIONAL - Postal Service Files Requests for New Rules on Market Dominant Rates
    Announcements
    12/22/2025
    INFORMATIONAL - MGI Important Dates
    Announcements
    12/19/2025
    INFORMATIONAL - January Price Change 2026 - Commercial System Releases January 4
    Contact Lists
    12/19/2025
    Mail Tracking Vendor List

    This document provides contact information for a number of third-party service providers who offer mail owner and mail service provider solutions.

    Announcements
    12/18/2025
    DELIVERY - Winter Weather Update December 18