Short answer: in the large majority of cases, USPS tracking not updating is not a lost package, it just means your item has not been scanned recently. Tracking only moves when a barcode is scanned at a facility or on a truck, and a package in transit can genuinely go a day or two, sometimes longer over a weekend or holiday, between scans while it is still moving normally. The time to actually worry is when tracking sits completely still for about a week past the expected delivery date.
Here is why the updates stall, how USPS tracking actually works, how long a gap is normal, and exactly what to do if it drags on.
Why is my USPS tracking not updating?
There are a handful of common reasons, and almost all of them are temporary:
- The package is between scans. This is the most common cause by far. Tracking only updates when the barcode is scanned, and there can be long stretches, especially on a truck between two distant facilities, where no scan happens even though the package is moving the whole time.
- A missed scan. USPS handles hundreds of millions of pieces a day, and occasionally a package slips through a facility without being scanned. It almost always gets picked up at the next stop, and the tracking jumps forward then.
- A backlog at a facility. During the holidays or any volume surge, a package can sit in line at a processing center for a day or two before it moves again, and the tracking sits with it.
- Weather. Storms, snow, and other disruptions ground planes and slow trucks, and a package stuck in a weather-affected region will not scan again until it starts moving.
- A damaged or unreadable barcode. If the label gets torn or wet in transit, scanners cannot read it, so updates stop even though the package is still on its way.
Notice that in every one of these, the package still exists and is still headed your way. A stalled tracking page is a scanning gap far more often than it is an actual problem.
Is a stalled tracking page a lost package?
Usually not. It is easy to assume the worst when the page has not moved in two days, but a genuine loss is rare, and USPS delivery rates are extremely high. Far more often, one of two harmless things is happening: the package is simply between scans and still moving, or it has already been delivered and the final scan was missed.
That second case is worth acting on right away, because it is the easiest to resolve. If your tracking stopped near the destination and the expected date has arrived, check around your porch, mailbox, side door, and with neighbors, and confirm whether it actually showed up. A missed delivery scan is common, and the package is often already there. This is different from the situation where the tracking says delivered but there is no package, which has its own set of steps.
How USPS tracking actually works
Understanding the mechanics takes most of the anxiety out of a stalled page. When your item ships, USPS assigns it a tracking number, usually a 22-digit number (Priority Mail Express uses a 13-character code that starts with two letters and ends in US). That number is tied to the barcode on the label.
Every time the package reaches a facility or is loaded onto a truck, the barcode is scanned, and the system posts the update, typically within 24 hours of the scan though often much faster. The key point is that tracking is a record of scans, not a live GPS feed. It shows where your package was last seen and where it is headed, not its position minute to minute. How many updates you see depends on distance: a local delivery might scan only once or twice, while a cross-country trip passes through several facilities and scans more often. You can find your tracking number on your shipping confirmation email, your Post Office receipt, or your insurance receipt.
How long is too long?
This is the question that actually matters, and here is a realistic guide:
- 1 to 2 days with no update: completely normal, especially over a weekend or while a package is on a long-haul leg. No action needed.
- 3 to 5 days with no update: still usually fine, particularly during the holidays, bad weather, or if the package is crossing the country. Keep an eye on it.
- About a week past the expected delivery date with no movement: this is the point to take action and contact USPS.
If you want to know what the expected delivery date should be in the first place, our free Delivery Time Estimator gives you a realistic business-day window from the origin and destination ZIP codes, and around holidays the Postal Holiday and Delivery Day Checker tells you whether a no-movement day is simply a non-delivery day.
What to do when USPS tracking is not updating
Work through these in order:
- Double-check the tracking number. A single wrong digit in a 22-digit number shows the wrong result or none at all. Copy it directly from your confirmation rather than typing it.
- Give it a day or two. Most stalled tracking clears on its own as the package hits its next scan. This resolves the large majority of cases.
- Check for a missed delivery. If the last scan was near your address, look around your property and ask household members and neighbors. It may already be delivered.
- Sign up for USPS Informed Delivery. This free service shows you previews of incoming mail and package status, which can surface an update the tracking page has not shown yet.
- Contact USPS after about a week. Call USPS customer service at 1-800-275-8777 (1-800-ASK-USPS) with your tracking number, or file a help request or missing-mail search on USPS.com. If you bought the item from a seller, contacting them can help too, since the shipper can also open a case.
Related tracking situations
A stalled tracking page often overlaps with other statuses, and knowing the difference tells you whether to wait or act:
- If the page is frozen on In Transit for an unusually long time, that specific situation is covered in USPS tracking says in transit for days.
- If it went Out for Delivery and then nothing arrived, see USPS out for delivery but not delivered.
- If it shows Delivered but the package is not there, follow the steps in USPS says delivered but no package.
For the timing side of things, our guides on how late USPS delivers and what time USPS delivers explain when to expect a package once it starts moving again.
Frequently asked questions
How long does USPS tracking take to update?
USPS tracking usually updates within 24 hours of a scan, and often much faster. Because it only updates when the barcode is scanned, there can be normal gaps of a day or two between scans while the package is still moving.
Is my package lost if the tracking has not updated?
Almost never. A stalled tracking page is usually a scanning gap, a backlog, or weather, not a lost package. Genuine losses are rare. If the last scan was near your address, check whether it was already delivered.
Should I worry if tracking has not updated for 2 to 3 days?
No. Two to three days with no scan is normal, especially over weekends, during the holidays, in bad weather, or on a long cross-country trip. Take action only when it stalls for about a week past the expected date.
What should I do if tracking has not updated for a week?
Contact USPS. Call 1-800-275-8777 with your tracking number, or file a help request or missing-mail search on USPS.com. If you bought the item from a seller, ask them to open a case too.
Why does USPS tracking not show my package moving in real time?
USPS tracking is a record of barcode scans, not a live GPS feed. It shows where your package was last scanned and where it is headed, not its exact position at every moment, so there are gaps between updates.
Can First-Class Mail be delayed like this too?
Yes. Only Priority Mail Express carries a delivery guarantee. First-Class Mail, Ground Advantage, and Priority Mail all give estimates, not promises, so they can run late and show tracking gaps without anything being wrong.
The bottom line
USPS tracking not updating is nearly always a scanning gap rather than a lost package. Tracking only moves when the barcode is scanned, so a day or two, sometimes a few, with no update is normal, particularly over weekends, in bad weather, or during the holiday rush. Double-check the number, check whether it was already delivered, and give it time. If it stalls for about a week past the expected delivery date with no movement, that is when to call USPS at 1-800-275-8777 or file a missing-mail search.
Don’t think the customer service phone number is accurate.
in two places it is shown as
” USPS customer support via phone call at 1-800-275-877 ; ”
Have not tried this number but have never seen a phone number ending in 3 digits instead of 4.
3 days ago I mailed a package that shows no movement whatsoever.
The number is actually 1-800-275-8777 your likely to get stuck on hold for about 45 min and they can’t tell you anything more then what the tracking shows on your end.
If a package is scanned to a certain location does it in fact mean that the package was actually at that location? Does each location have a unique scanner code to properly identify it?
Yes, generally a scan means the item was physically at that facility, since it is scanned on arrival and again on departure. Each processing site and handheld scanner is tied to a location code, so the scan carries where it happened. The main exception is a mis-scan or a delayed upload, which is why a scan occasionally posts late or shows an odd location, but the package really did pass through the point that was scanned.
The USPS site is not working. I’ve attempted to get UPDATES throughout the day. Nothing happens when I click the ‘GET UPDATES’ button. It’s impossible to reach anyone at ‘technical support’ or ‘customer service’ to report this issue.
When the site button hangs like that, the reliable workarounds are text tracking (text your tracking number to 28777) or signing into Informed Delivery, which pulls the same scans without that button. For the site issue itself, 1-800-275-8777 is the line, though a different browser or clearing your cache often fixes a stuck Get Updates button.
I’ve noticed in the past few weeks (as of today, 22jun2025), that USPS delivery confirmation texts, like “package delivered at front door,” or “in mailbox,” are arriving around 5-6 days later, AFTER the package was delivered. And today, 6/22, I received a delivery text for a package dated 4/12/2025. Also today, I received two delivery confirmation texts for the same package (same tracking number).
How can the average citizen report these issues to the USPS?
The lagging and duplicated notifications are a known glitch on the alert system, not a sign your mail is being mishandled. To report it, use the help form at usps.com/help/contact-us.htm or call 1-800-275-8777, and mention it is a tracking-notification delay specifically. Informed Delivery on the website tends to show the accurate scan times even when the texts are late.
There are so many laughable quotes from this article. The USPOS has to be the most inept and unreliable package currier out there, period! This is sad, because once upon a time they use to deliver packages on time and by the date given. Unfortunately that’s not the case nowadays and they should just stick with delivering mail. Hell, they don’t even give an updated delivery date anymore when they miss the delivery date, like they usually do. You get more of a “meh, it’s out there somewhere, you’ll get it when you get it” generic message. Priority mail packages are averaging 7 days to deliver, even within the same state. I had a package that was coming from Minnesota to Ohio, sat with no updates for 3 days before getting scanned at a post office in ALASKA!!! My recent delivery from Missouri to Ohio went 3 days with no departure scan and when it updated on the 4th day in was in Atlanta Georgia where it’s now been sitting for the last 3 days!!! WTF?? Those are just the most recent ones, I could go on for days giving examples from personal experience. This is the opposite of efficient, or reliable service. Avoid at all cost whenever possible if you are wanting a quick and reliable package delivery service.
The Alaska and Atlanta detours you are seeing are missorts, where a package gets scanned onto the wrong container and rides to the wrong hub before the system catches it. It is infuriating and it does inflate delivery times well past the estimate. When tracking stalls for days like that, our guide on USPS tracking not updating covers what actually helps and when to file an inquiry. You are not imagining the pattern.