When tracking freezes for days, the natural reaction is to worry. That's almost always wasted energy. Ground packages cross the country for 4-5 days with zero scans. International packages cross oceans with a 12-36 hour flight blackout. Your package is moving — it's just not getting scanned.
This guide explains the seven most common reasons tracking stops updating, so you can set realistic expectations and know when — and when not — to be concerned.
Enter your tracking number on ParcelsZen to see the most current status across all carrier systems — sometimes one carrier database shows updates that the carrier's own site doesn't yet reflect.
Reason 1: The Package Is in Long-Distance Ground Transport
When a package travels across the country by ground — say, from California to New York — it may spend 4-5 days in a truck with no intermediate scans. USPS, UPS Ground, and FedEx Ground all have routes where packages travel for multiple days between scanning facilities.
This is completely normal. A UPS Ground package going cross-country may only show one or two facility scans during its 5-day journey.
Reason 2: The Package Is in the Air
International packages spend anywhere from 12 to 36+ hours in air transport between facilities. During the flight, there are no scans — the package is in a cargo container inside an aircraft.
You'll see a scan when it departed (e.g., 'Departed from Shanghai Pudong Airport') and then nothing until it lands and is scanned at the destination facility.
Reason 3: It's the Weekend or a Holiday
USPS does not sort First Class Mail or operate most processing facilities on Sundays. FedEx and UPS have reduced operations on weekends. If your package's last scan was on a Friday and it's now Monday, the 'gap' is just the weekend.
Similarly, all carriers reduce operations around major US holidays (Thanksgiving, Christmas, New Year's, etc.).
Check Your Package's Latest Status
ParcelsZen shows real-time updates across all carrier systems in one place.
Check Tracking NowReason 4: High Volume Periods
During peak periods — November, December, and early January — shipping carriers are handling 3-5x their normal package volume. This causes delays at sorting facilities, which means packages often sit for extra days without being scanned.
This is when your 7-day shipping might take 14 days, and tracking may appear frozen.
Reason 5: The Package Is in International Customs
Packages crossing international borders can sit in customs holding for 1-10+ days. During this time, tracking typically shows 'In Customs' or 'Clearance in Progress' without any further movement.
Unless you receive a notice requesting documentation or payment, there is usually nothing you can do but wait.
Reason 6: The Carrier Missed a Scan
Not every package gets scanned at every facility. Carriers use automated barcode scanners on conveyor systems, and occasionally a package passes through a facility without being scanned — due to scanner failure, a barcode that won't read, or the package being misrouted.
The next scan will occur when the package reaches a facility that does successfully scan it. The package is still moving — it just wasn't recorded.
Reason 7: The Package Is Lost or Damaged in Transit
This is the least likely scenario but does happen. If your tracking has genuinely not updated in 10 business days for domestic packages, or 20+ days for international, and it's not a holiday or peak period, the package may have been lost in the network.
See our full guide on what to do if a package is lost for next steps including how to file a carrier claim.
When Should You Actually Be Worried?
- Domestic USPS Priority Mail: Worry after 10 days without update
- Domestic USPS Ground Advantage: Worry after 15 days
- UPS/FedEx Ground domestic: Worry after 7-10 days
- International economy (China Post, ePacket): Worry after 30-45 days
- International express (DHL, FedEx): Worry after 10 days
Frequently Asked Questions
Worry Thresholds Quick Reference
Check current status on ParcelsZen before doing anything else. The thresholds in this guide are real: 10 days without a scan on Priority Mail is the point to call. Before that, checking obsessively doesn't change the outcome — and most of the time the next scan appears on its own.
- USPS Priority Mail: Normal gap up to 10 days
- USPS Ground Advantage: Normal gap up to 15 days
- UPS / FedEx Ground: Normal gap up to 7-10 days
- International economy (China Post, ePacket): Normal gap up to 30-45 days
- International express (DHL, FedEx): Worry after 10 days
- Friday → Monday gap: Weekend only — completely normal