If you’ve lost a USPS tracking number, USPS customer service can’t look it up for you: USPS says local Post Offices and its Care Center agents have no way to recover lost tracking numbers. You’ll find it on your mailing receipt or email receipt, in the label record of the site where you bought postage, under the barcode on the package, or, if you’re the recipient, in your Informed Delivery dashboard.
This guide walks through each place a USPS tracking number is stored, what to do if you’re the recipient, and when calling USPS tracking number customer service actually helps. If you already have the number and need help with the package itself, our guide to USPS tracking support covers delays, missing scans and claims.
Where Can You Find a Lost USPS Tracking Number?
USPS lists four places a tracking number is recorded. Check them in this order, because the first two cover most shipments:
| How you shipped | Where the tracking number is |
|---|---|
| At a Post Office counter or self-service kiosk | Printed sales or mailing receipt, or the eReceipt USPS emailed you |
| Bought postage online (Click-N-Ship, eBay or another service) | The label record or shipment history on that site, plus its confirmation email |
| You still have the package or a photo of the label | The number printed below the barcode |
| You’re the recipient | Your Informed Delivery dashboard, or ask the sender |
Check Your Post Office Receipt
Retail, kiosk, return and insurance receipts all print the tracking number, usually near the line for the postage you bought. It’s a long number, typically 20 to 22 digits for domestic packages, and it often starts with 9. Our guide on finding your USPS tracking number from a receipt shows exactly where it appears on each receipt type.
If you gave the clerk your email address, USPS also sends an eReceipt. Search your inbox for “USPS” or “receipt” on the mailing date.
Check Where You Bought the Label
When you buy postage online, the number is saved with the label. In USPS Click-N-Ship, open your shipping history. On eBay, it’s attached to the order. On any other shipping site, look in its shipment or label history and in the confirmation email it sent when you paid.
Online sellers can also check the order record in their store, since most platforms save the tracking number when you mark an order shipped.
Look at the Package or Label
If the package hasn’t left yet, or you took a photo of the label, the tracking number is printed directly below the barcode. Business shippers often keep a copy of every label for this reason.
How Do You Get the Tracking Number If You’re the Recipient?
Ask the sender first. Retailers put the tracking number in the shipping confirmation email and in your order history, and a person who mailed you something can find it on their receipt.
If you’re signed up for USPS Informed Delivery, the free service that previews mail headed to your address, packages addressed to you appear on your dashboard with their tracking numbers. That’s the closest thing USPS offers to looking up a package by address. If a tracking number from the sender doesn’t return results, our guide to the USPS tracking number search “Tracking Not Available” message explains why new labels often don’t show up right away.
Can USPS Customer Service Find a Tracking Number for You?
No. USPS’s own help page is direct about it: Post Offices and Care Center agents can’t recover a lost tracking number, and recipients should ask the sender. USPS also says the package information its representatives see is the same as what appears in USPS Tracking, so a phone call won’t reveal more than the website does.
Customer service is still the right call once you have the number, or when a package seems lost. You can reach USPS at these numbers:
| Line | Number | Hours (Eastern Time) | Use it for |
|---|---|---|---|
| Customer Care Center (1-800-ASK-USPS) | 1-800-275-8777 | Mon–Fri 8 a.m.–8:30 p.m., Sat 8 a.m.–6 p.m. | General help, including tracking questions |
| Domestic and International Tracking | 1-800-222-1811 | Mon–Fri 8 a.m.–8:30 p.m., Sat 8 a.m.–6 p.m. | Package status with a tracking number |
| Technical Support | 1-800-344-7779 | Mon–Fri 8 a.m.–8:30 p.m., Sat 8 a.m.–6 p.m. | Problems with Click-N-Ship or your USPS.com account |
That Technical Support line helps if you bought a label in Click-N-Ship and can’t get into your account or shipping history. For every USPS phone line, menu shortcut and wait-time tip, see our USPS customer service number guide.
What If You Can’t Recover the Tracking Number?
You can still find a lost package without its number. If it hasn’t arrived in a reasonable time, submit a USPS Missing Mail search at usps.com with as much detail as you have: the sender and recipient addresses, the mailing date, the service used, and a description of the package and its contents. Our USPS Missing Mail search guide explains the steps and what happens next.
Keep your proof of mailing, such as a bank or card statement showing the Post Office purchase. It won’t show the tracking number, but it confirms the date and location, which helps if you later file a claim for an insured item.
What If You Have the Number but Tracking Isn’t Working?
A number that returns an error is a different problem from a lost one. Check for typos and extra spaces first, then work through the common causes:
- Brand-new label: tracking appears only after USPS scans the package. Our guide to USPS tracking not updating after drop-off explains the gap.
- No new scans for days: see why USPS tracking is not updating and when it becomes a concern.
- Error message on every number: the site itself may be having problems. Check whether USPS tracking is down before assuming the number is wrong.
- “Invalid” or “not found”: our fixes for a USPS tracking number that isn’t working cover format and timing issues.
To understand what each scan and status means, read what USPS Tracking is and how it works. If you want alerts without checking manually, compare package tracking services that follow shipments across carriers.
How Can You Avoid Losing a Tracking Number Next Time?
The easiest fix is to buy postage somewhere that saves it for you. Online labels keep the tracking number in your account, so you’re not relying on a paper receipt. If you ship through ParcelPath, labels are discounted up to 89% off USPS and up to 85% off UPS, it’s free to use, and you can show a USPS Label Broker code at the Post Office instead of printing. You can compare live USPS and UPS rates in the ParcelPath rate calculator.
A few other habits help:
- Give the Post Office clerk your email address so you get an eReceipt.
- Photograph the label before you hand over the package.
- Sign up for USPS Text or Email Tracking updates as soon as you have the number.
- Send the tracking number to the recipient right away, so two people have it.
Frequently Asked Questions
Can USPS customer service find my lost tracking number?
No. USPS states that local Post Offices and Care Center agents don’t have a way to recover lost tracking numbers. Senders should check their mailing receipt or eReceipt, the label record where they bought postage, or the barcode on the item. Recipients should ask the sender or check Informed Delivery.
Where is the tracking number on a USPS receipt?
USPS prints the tracking number on retail, kiosk, return and insurance receipts, listed with the postage item it belongs to. Domestic tracking numbers are usually 20 to 22 digits long. If you gave the clerk your email address, the same number appears on the eReceipt USPS sends you.
Can I find a USPS tracking number with my address?
Only for packages coming to you. If you’re signed up for USPS Informed Delivery, packages addressed to you appear on your dashboard with their tracking numbers. USPS doesn’t offer a lookup by the sender’s address, so senders must use their receipt or label record instead.
What is the USPS tracking phone number?
USPS’s tracking line is 1-800-222-1811, and its main customer service line is 1-800-275-8777 (1-800-ASK-USPS). Both are staffed Monday to Friday from 8 a.m. to 8:30 p.m. Eastern Time and Saturday from 8 a.m. to 6 p.m. Eastern Time. Have your tracking number ready when you call.
Sources
Part of our USPS Tracking guide. Related: USPS Tracking Not Updating, USPS Tracking Not Updating After Drop Off.
