United States Postal Service 1-800 number
United States Postal Service (USPS) – an independent agency of the US Federal Government, the operator of postal services on the territory of the United States of America.
Customer Service: 1-800-275-8777 (1-800-ASK-USPS)
Track and Confirm’s customer service: 1-800-222-1811
Facilities Access and Shipment Tracking (FAST) : 877-569-6614
Mail Tracking & Reporting : (800) 238-3150