Tracking Number
Also known as: Tracking ID, Tracking Code, Shipment Number
Definition
A tracking number is a unique code assigned to every package that lets you follow its journey through the shipping network. Think of it as your package’s passport—it gets scanned at every stop, creating a trail you can follow online.
Tracking Number Formats by Carrier
Each carrier uses different formats:
| Carrier | Format | Example |
|---|---|---|
| USPS | 20-22 digits | 9400111899223033005048 |
| UPS | 18 characters (1Z + 16) | 1Z999AA10123456784 |
| FedEx | 12-15 digits | 449044304137821 |
| DHL | 10-11 digits | 1234567890 |
How Tracking Works
- Label creation - Tracking number generated when label is printed
- First scan - Package enters carrier network (pickup or drop-off)
- In-transit scans - Each facility scans as it passes through
- Out for delivery - Loaded onto delivery vehicle
- Delivered - Final scan confirms delivery
Common Tracking Statuses
| Status | Meaning |
|---|---|
| Label Created | Label printed, not yet with carrier |
| Picked Up | Carrier has the package |
| In Transit | Moving through carrier network |
| Out for Delivery | On truck for delivery today |
| Delivered | Successfully delivered |
| Delivery Attempted | No one home; will retry |
| Exception | Problem requiring attention |
Why “No Tracking Info” Happens
Several reasons a tracking number might not show info:
- Too early - Allow 24 hours after label creation
- Not scanned yet - Package hasn’t entered network
- Wrong carrier - Checking wrong carrier’s website
- System delay - Carrier tracking database updating
- Handed to another carrier - Check partner carrier’s site
Tracking Tips
- Save tracking numbers - Screenshot or copy immediately
- Use carrier apps - Set up delivery notifications
- Check multiple sources - Sometimes third-party trackers update faster
- Know carrier handoffs - USPS might finish delivery for UPS SurePost
- Contact support early - If stuck “in transit” for 5+ days
Providing Tracking to Customers
For e-commerce sellers:
- Send tracking immediately after shipping
- Include carrier name (customers often forget)
- Set expectations (“tracking updates in 24-48 hours”)
- Consider branded tracking pages for professional appearance
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