USPS Customer Service Hours
Monday – Friday 8 AM – 8:30 PM ET
Saturday 8 AM – 6 PM ET
Customer service phone number: 1-800-ASK-USPS® (1-800-275-8777)
TDD/TTY Relay: Call 1-800-877-8339. Ask for 1-800-275-8777
USPS Technical Support Hours
Monday – Friday 8 AM – 8:30 PM ET
Saturday 8 AM – 6 PM ET
Technical support phone number: 1-800-344-7779
USPS Tracking Hours
Monday – Friday 8 AM – 8:30 PM ET
Saturday 8 AM – 6 PM ET
USPS Tracking Phone: 1-800-222-1811
USPS Stamps & Postal Store Orders Hours
Monday – Friday 8 AM – 8 PM ET
Saturday 8 AM – 6 PM ET
1-800-Stamp24 (1-800-782-6724)
USPS Free Shipping Supplies Hours
Monday – Friday 7 AM – 11 PM ET
Saturday 7 AM – 6 PM ET
USPS Free Shipping Supplies Phone: 1-800-610-8734