Need to track a USPS package? Enter your USPS tracking number below to get live shipment status instantly. USPS (United States Postal Service) is the US national postal service, delivering to every address in the country including remote rural areas that private couriers may not cover directly, and it's the default carrier for many low-cost domestic and inbound international shipments.
USPS Tracking Number Format — How to Find It
USPS tracking numbers typically follow this format: 20-22 digits or 2 letters + 9 digits + US
Example: 9400111899223197428490
You'll usually find your USPS tracking number on your shipping receipt, order confirmation email, or the waybill slip attached to your package at pickup.
How USPS Shipping Works
USPS operates several service tiers — First-Class, Priority Mail, and Priority Mail Express — each with different tracking scan frequency; First-Class international mail in particular may show fewer scans than Priority or Express tiers.
Inbound international packages handled by USPS are processed through US Customs and Border Protection; USPS itself does not set duty amounts but will notify recipients if duties are owed before final delivery.
Typical delivery time: First-Class: 2-5 business days. Priority Mail: 1-3 business days. Inbound international: varies widely by origin country and customs, often 1-4 weeks.
Common Tracking Status Meanings
Label Created - Shipping label generated, awaiting courier pickup
Picked Up - Courier has collected the package from sender
In Transit - Package is moving between sorting facilities
Arrived at Hub - Package at local distribution center
Customs Clearance - Package being processed by customs
Out for Delivery - On delivery vehicle for final delivery
Delivered - Package successfully delivered to recipient
USPS Tracking Not Working? Common Reasons Why
If your USPS tracking isn't updating, here's what's usually going on:
24-48 hour delay: First scan may take up to 2 days after pickup
Weekend or holiday: No scans on non-business days
Customs hold: International packages may be delayed for inspection
Incorrect tracking number: Verify with your sender
If there's no update after several business days, double check the tracking number against your order confirmation, then reach out to USPS's own customer support if the issue persists.
Where do I find my USPS tracking number? Your USPS tracking number is printed on the shipping receipt or waybill given at pickup, and is also usually included in the order confirmation or shipping notification email from whoever sent the package.
Why does USPS tracking show 'in transit, arriving late'? This status indicates the package missed its original estimated delivery window and is still moving through the network; it usually resolves within a few additional days.
Does USPS deliver on Sundays? USPS generally does not deliver standard mail on Sundays, though Amazon-contracted Sunday delivery exists for some Priority Mail and partner shipments.
What if USPS tracking shows delivered but I didn't receive my package? Contact USPS directly as soon as possible. Check with neighbors or household members first, and ask the carrier for proof-of-delivery details such as a photo or signature if available.
Is OG Track free to use for USPS tracking? Yes, OG Track's USPS tracking lookup is completely free with no signup required.