Freight Tracking Number Formats Explained
Understand different freight tracking number formats used by major carriers. Learn to identify PRO numbers, BOL numbers, and carrier-specific tracking IDs.
Table of Contents
Introduction to Tracking Numbers
Freight tracking numbers are the backbone of shipment visibility. Every carrier uses specific formats for their tracking identifiers, and understanding these formats helps you track shipments efficiently and communicate effectively with carriers.
This guide covers the most common tracking number formats used in the freight industry, including PRO numbers, BOL numbers, and carrier-specific identifiers.
PRO Numbers (Progressive Rotating Order)
PRO numbers are the standard tracking identifiers for LTL (Less-Than-Truckload) shipments. Each carrier generates unique PRO numbers using their own format.
Common PRO Number Formats
| Carrier | Format | Example |
|---|---|---|
| ABF Freight | 10 digits | 1234567890 |
| R+L Carriers | 9-11 digits | 123456789 |
| SAIA | 10 digits | 0123456789 |
| XPO Logistics | Alphanumeric | XPO123456789 |
| Forward Air | 10 digits | 1234567890 |
PRO numbers are assigned when a shipment is picked up and remain constant throughout the shipping process.
Bill of Lading (BOL) Numbers
A Bill of Lading (BOL) number is a document reference that accompanies freight shipments. While PRO numbers are carrier-assigned, BOL numbers are typically shipper-assigned.
BOL vs PRO Numbers
- BOL Number - Created by the shipper, appears on shipping documents
- PRO Number - Assigned by the carrier for tracking purposes
Some carriers allow tracking by BOL number, but PRO numbers are more universally supported for real-time tracking.
When to Use Each
Use PRO numbers for real-time tracking. Use BOL numbers when communicating with the shipper or referencing original shipping documentation.
Carrier-Specific Tracking IDs
Beyond standard PRO numbers, some carriers use additional tracking identifiers:
3PL Reference Numbers
Third-party logistics providers like C.H. Robinson and Banyan Technology use their own reference systems that link to underlying carrier PRO numbers.
Pickup Numbers
Some carriers assign separate pickup numbers that differ from the final PRO number. Always confirm which number to use for tracking.
Interline Shipments
When shipments transfer between carriers (interline), you may receive multiple tracking numbers - one for each carrier segment.
Where to Find Your Tracking Number
Tracking numbers appear on several documents:
- Bill of Lading - Usually in the header or reference section
- Pickup Receipt - Provided by the driver at pickup
- Shipping Confirmation Email - From your carrier or 3PL
- Carrier Invoice - Listed with shipment details
- TMS/WMS Systems - In your transportation or warehouse management software
If you can't locate your tracking number, contact the carrier with your pickup date, origin, and destination to retrieve it.
Tips for Managing Tracking Numbers
Effective tracking number management saves time and reduces errors:
Standardize Your Process
Create a consistent system for recording and organizing tracking numbers. Use spreadsheets or a TMS for centralized management.
Verify Format Accuracy
Double-check that tracking numbers match the expected format for each carrier. Incorrect formats will return tracking errors.
Use Multi-Carrier Tools
Instead of visiting multiple carrier websites, use a unified platform like ShipmentTrack to track all your shipments in one place.
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