National Postal Forum 2026

01/02/2026 11:00

The U.S. Postal Service is honoring Phillis Wheatley (1753-1784), the first author of African descent in the American Colonies to publish a book, with the 49th stamp in the Black Heritage series.

12/17/2025 10:13

The U.S. Postal Service will commemorate the 150th anniversary of Colorado becoming a state with the issuance of Colorado Statehood, a Forever stamp featuring a photograph of Jagged Mountain by nature photographer John Fielder. The first-day-of-issue event is free and open to the public.

12/17/2025 06:26

WASHINGTON — The U.S. Postal Service today announced that it will open up entry to its valuable last mile delivery network. Shippers large and small will be able to access the more than 18,000 USPS delivery destination units (DDUs) nationwide via a solicitation process that will begin accepting bids in late January or early February 2026.

12/15/2025 10:00

The U.S. Postal Service will honor Muhammad Ali, known as “The Greatest,” with two stamps. Ali once said, “I should be a postage stamp, because that's the only way I'll ever get licked.” Born Cassius Marcellus Clay Jr. in Louisville, KY, Ali was known across the globe as a champion in and beyond the boxing ring.

12/12/2025 12:00

WASHINGTON — The U.S. Postal Service today announced the Priority Mail and Priority Mail Express stamps it will release in 2026. There will be additional stamp subjects to be announced in the coming weeks and months. These designs are preliminary and may change.

11/21/2025 17:25

COLORADO — The U.S. Postal Service will observe the Thanksgiving federal holiday on Thursday, Nov. 27. All Post Office locations will be closed and only Priority Mail Express will be delivered that day. Regular mail delivery and retail services will resume on Friday, Nov. 28.

11/05/2025 07:29

COLORADO— The U.S. Postal Service will observe Veterans Day on Tuesday, Nov. 11. All Post Office locations will be closed in recognition of the federal holiday. Only Priority Mail Express will be delivered that day, and regular mail delivery and retail services will resume on Wednesday, Nov. 12.

Help Stamp Out Breast Cancer

10/24/2025 14:50

COLORADO — The Postal Service is more than ready to deliver for the 2025 holiday season. Continued investment in modernization will boost the strong service customers have come to expect throughout the organization’s 250 years of service to the nation.

10/10/2025 06:15

COLORADO — October is Breast Cancer Awareness Month, and the U.S. Postal Service is reminding customers that they can help fund the cause by purchasing the Breast Cancer Research stamp.

January 4 2026 Release Notes

10/09/2025 06:33

COLORADO — The U.S. Postal Service will observe Columbus Day on Monday, Oct. 13. Post Office locations will be closed in recognition of the federal holiday. Only Priority Mail Express items will be delivered on the holiday, and regular mail delivery and retail services will resume on Tuesday, Oct. 14.

PostalPro News

News from PostalPro.

Early Warning System (EWS002C0.ZIP)

01/04/2026 05:00

Labeling Lists Technical Guide

01/02/2026 05:00

This file is the EWS production file and is updated weekly. This file contains the Early Warning System data file for the CASS™ and MASS™ certification process.

01/02/2026 05:00

The Labeling Lists data product assists mailers with presorting mail. It provides active, originating 3- and 5-digit ZIP Code™ data along with their destination locations [including city/state/ZIP Code] for labeling purposes. The product contains complete data files of each list found online via Postal Explorer® at https://pe.usps.com. Updates to the Labeling Lists are also published in the Postal Bulletin.

Z4 Info File

ZIP Codes by Area and District codes

01/02/2026 05:00

A downloadable ZIP file containing information related to the Z4 Info File

December 2025 Nixie Volume

01/02/2026 05:00

The Excel spreadsheet lists ZIP Codes with the associated Area and District Codes.

01/02/2026 05:00

This spreadsheet contains the UAA statistics for December 2025.