USPS delivers over 421 million pieces of mail and packages every single day. At that scale, a 72-hour tracking silence or cryptic status message is not a lost package — it's a normal scan gap. The key is knowing which statuses actually require action.
This complete guide explains every USPS tracking status code in plain language so you always know where your package is and what to do if something seems wrong.
You can track any USPS package on ParcelsZen. Paste your tracking number and get instant status updates — no carrier selection needed.
Understanding USPS Tracking Numbers
USPS tracking numbers come in several formats depending on the mail class:
- 22-digit numbers starting with 9400, 9205, 9261, or 9208 — Priority Mail, Priority Mail Express, Certified Mail
- 13-character numbers starting with two letters, ending with 'US' — e.g., EA123456789US — international shipments
- 20-22 digit numbers starting with 92 or 94 — USPS Ground Advantage and Parcel Select
Always copy your tracking number exactly as it appears in your shipping confirmation email, including any letters.
USPS Tracking Status Codes: Complete Reference
'Pre-Shipment' or 'Label Created, Not Yet in System'
The seller has created a USPS shipping label and paid postage but has not yet physically dropped off the package. This can persist for 24-72 hours. If unchanged after 3 days, contact the seller.
'USPS in Possession of Item' or 'Accepted at USPS Origin Facility'
USPS has received the package at a post office or collection point. This is the first scan confirming the package is physically in the system.
'Arrived at USPS Regional Origin Facility'
The package has reached the first major USPS sorting center near the origin. From here it will be processed and routed toward its destination.
'Departed USPS Regional Facility'
The package has left a major sorting center and is en route to the next facility or your local post office.
'In Transit to Next Facility'
The package is between facilities. This is a completely normal status that can last several days for cross-country shipments.
'Arrived at USPS Regional Destination Facility'
The package has reached the major sorting facility nearest your delivery address. Delivery is usually 1-2 days away.
'Out for Delivery'
The package is on a mail carrier's route and should be delivered today. USPS delivers 7 days a week including Sundays for packages in most areas.
'Delivered'
Your package has been delivered. Check your mailbox, front door, or any location specified in the delivery details.
Track Your USPS Package Now
Enter your USPS tracking number for instant status updates from USPS systems.
Track USPS PackageException and Problem Statuses
'Delivery Attempted – No Access to Delivery Location'
The mail carrier could not access your mailbox or delivery area. Check for a PS Form 3849 (delivery notice) and follow the instructions to schedule redelivery.
'Notice Left – Addressee Not Available'
A signature was required but no one was home. A PS Form 3849 was left. You can schedule redelivery at USPS.com or pick up at your local post office.
'Addressee Unknown'
USPS cannot locate a person by that name at the address. Contact USPS at 1-800-275-8777.
'Insufficient Address'
The address on the package is incomplete or incorrect. USPS will attempt to correct it or return to sender. Contact the original seller.
'Return to Sender'
The package could not be delivered and is being returned to the original sender. Contact the sender immediately.
'Forwarded'
The package is being sent to a new address because mail forwarding was set up. This adds 1-5 additional business days.
If you see Return to Sender, contact the sender immediately. Once returned, you'll need to arrange re-shipment which may involve additional shipping costs.
International USPS Statuses
'Arrived at ISC [City]'
The package has arrived at an International Service Center — the main entry/exit points for international mail (New York, Chicago, Los Angeles, Miami, San Francisco). Processing typically takes 1-3 days.
'Customs Clearance'
The package is being reviewed by US Customs and Border Protection. This can take a few hours to several days depending on the contents and country of origin.
'International Dispatch'
The package has left the United States and is en route to the destination country's postal service. Tracking updates may pause until the destination country scans it.
Why USPS Tracking Sometimes Goes Silent
USPS does not scan packages at every facility — unlike UPS or FedEx. Several reasons for gaps:
- Packages traveling by ground may go 3-5 days without a scan during long cross-country routes
- USPS Ground Advantage receives fewer scans than Priority Mail
- During peak periods (holidays, storms), some facilities skip scans to maintain throughput
General rule: if your Priority Mail hasn't updated in 5+ days, or your Ground Advantage in 10+ days, contact USPS at 1-800-275-8777 or the sender to investigate.
Frequently Asked Questions
Track Your USPS Package on ParcelsZen
Paste your USPS tracking number into ParcelsZen for instant status. A useful rule: if it's Priority Mail and nothing has moved in 10 days, that's when to call 1-800-275-8777. Before that, waiting is almost always the right answer.
- Pre-Shipment: Label created, not yet with USPS
- Accepted: USPS has the package physically
- In Transit: Moving through the network — normal
- Out for Delivery: On a carrier's route today
- Delivered: Successfully delivered
- Return to Sender: Contact sender immediately