USPS Tracking Phone Line (1-800-222-1811) — waiting time always 1 to 2 hours
My only complaint is that I am usually on hold for 1 - 2 hours waiting to speak to a representative. They should give you the option to hold on - or to leave your phone number for a call back. I work for a law firm, and after being on hold for 1 hour 45 minutes, I had to take a call, and when I got back to the USPS phone, they picked up and hung up, so I had to wait another 2 hours to speak to a rep. This is unacceptable!!