Announcements
06/26/2025
INFORMATIONAL: Postal Service Prepares for Network Distribution Center Entry and Presort Discount Elimination
User Guides
06/26/2025
Mailing and Shipping Solutions Center (MSSC) Topics

List of topics the MSSC can assist with. To reach the MSSC, email us at MSSC@usps.gov or call 1-877-672-0007 from 7:00AM – 7:00PM CT.

Fact Sheets
06/26/2025
About Mailers' Technical Advisory Committee (MTAC) User Group 4

This document provides a brief description of MTAC User Group 4 for mail visibility and provides a contact for requesting to join the group.

Announcements
06/25/2025
INFORMATIONAL - Key Personnel Announcements in the Chief Technology and Engineering Group
Announcements
06/25/2025
INFORMATIONAL - Executive Retirement - Scott R. Bombaugh Chief Technology Officer & Executive Vice President
Announcements
06/25/2025
INFORMATIONAL - Priority Mail Open and Distribute (PMOD) Service Updates
Announcements
06/25/2025
DELIVERY - Southern Area – Alabama-Mississippi District - Rolling Fork Post Office (39159) – Resumed Operations
Data Files
06/25/2025
Informed Visibility® Mail Tracking & Reporting (IV®-MTR) Operation Codes List

This spreadsheet provides a list of operation codes (opcodes), also known as Scan Event Codes, for the IV-MTR application.

Announcements
06/24/2025
DELIVERY - Central Area – Ohio 1 District Graytown Post Office (43432)
Announcements
06/24/2025
DELIVERY - Southern Area – Arkansas Oklahoma District Center City Station (73102) – Temporarily Suspended