UPS Tracking Number Format

This FAQ provides clear, detailed information about UPS tracking numbers, including their formats, service codes, and verification methods. Whether you're tracking a package or troubleshooting an issue, this guide offers practical answers to help you navigate the process with ease.

Table of Contents

• What is a UPS Tracking Number?
• Standard "1Z" Format
• Other UPS Tracking Number Formats
• Other Formats Recognized in 2025
• API & Updates for 2025
• Tracking & Retention Policy
• Real-Time Tracking Today
• Service Codes
• How to Verify a Tracking Number
• Checksum Calculation
• Example Tracking Numbers
• Tips for Effective Tracking
• International Tracking
• Troubleshooting Common Issues
• Frequently Asked Questions
• Additional Resources

What is a UPS Tracking Number?

A UPS tracking number is a unique code assigned to each package, allowing you to monitor its journey from shipment to delivery. The most common format is an 18-character alphanumeric code starting with "1Z", though other formats are used for specific services or regions.

Standard "1Z" Format

The 18-character "1Z" tracking number is structured as follows:

1Z xxx xxx yy zzzz zzz c

• 1Z: Identifies the number as a UPS tracking code.
• xxx xxx: A 6-character alphanumeric shipper account number (e.g., 662F41).
• yy: A 2-digit service level code (see Service Codes).
• zzzz zzz: An 8-digit package identifier (e.g., 68787878).
• c: A checksum digit to ensure the number’s validity.

Example: 1Z662F416878787827

Other UPS Tracking Number Formats

UPS also uses these tracking number formats:

• 9-digit numeric: e.g., 234918751, often for legacy or niche services.
• 10-digit alphanumeric: Starting with "H" or "V".
• 12-digit alphanumeric: Variations of the "1Z" format.
• 18-digit numeric: Typically used for freight or international shipments.

Other Formats Recognized in 2025

UPS systems now recognize a broader set of formats:

• 9-digit numeric: e.g., 123456789
• 10-character alphanumeric: e.g., T1234567890
• 12-digit numeric: e.g., 999999999999
• "1Z" + 16 characters: Total of 18 alphanumeric characters
• 7–20 characters: LTL/TL, air/sea waybills, delivery orders, PRO numbers
• Mail Innovations: 18–34 characters, including USPS confirmation IDs

To verify a "1Z" tracking number’s checksum, use tools like Mike’s checksum calculator.

API & Updates for 2025

• The UPS Track API accepts tracking numbers from 7 to 34 characters including 1Z, InfoNotice, Mail Innovations, FGV, and UPS Freight.
• The UPS Track Alert API provides near real-time event notifications for 1Z and 1R (Roadie) numbers. Supports up to 100 subscriptions for 14 days.

Tracking & Retention Policy

• Tracking data is stored for up to 120 days after delivery.
• Alert subscriptions remain active for 14 days, unless renewed.

Real-Time Tracking Today

Tracking responses include:

• Current status
• Package activity history
• Estimated delivery
• Optional proof-of-delivery (e.g., signature or photo)

Note: Updates may be delayed during weekends or in remote areas (allow up to 24 hours).

Service Codes

The 2-digit service code in a "1Z" tracking number indicates the delivery service used, such as overnight or ground shipping. Below is a non-exhaustive list of common codes:

How to Verify a Tracking Number

1. Check the Format: Should be 9, 10, 12, or 18 characters.
2. Identify the Prefix: e.g., "1Z", "H", "V", etc.
3. Match the Service Code: For "1Z" numbers, refer to the service codes.
4. Validate the Checksum: Use a calculator or the steps in the next section.
5. Test It: Enter it on www.ups.com/track or in the UPS Mobile App.

How to Calculate the UPS Checksum Digit (1Z)

To calculate the checksum for a "1Z" number:

1. Remove the "1Z" prefix.
2. Convert letters using: A=2, B=3, ..., Z=0; digits stay the same.
3. Multiply each position by 2 (odd) or 3 (even).
4. Add the results, modulo 10.
5. Subtract from 10 to get the checksum digit.

Online tools make this easier and faster.

Example Tracking Numbers

Below are examples of valid UPS tracking numbers:

• 9-digit: 234918751
• 18-character "1Z" format:
  • 1Z662F416878787827
  • 1Z001985YW96579840
  • 1Z001985YW99744790
  • 1Z001985YW90838348
  • 1Z001985YW92164287
  • 1ZE8889W0442766202

UPS Tracking Tips to Avoid Errors

• Enter tracking numbers carefully — they are case-sensitive.
• Each package in a multi-package shipment has its own number.
• Services like Signature Required may delay updates until delivered.
• Use the UPS Mobile App for alerts and notifications.
• Sign up for UPS My Choice for tracking updates via email or SMS.

International Tracking

International shipments may:

• Use standard "1Z" or numeric formats
• Experience customs delays or longer scan intervals
• Be tracked via www.ups.com/track/international

For support, contact UPS Global or use the international help portal.

Troubleshooting Common Issues

Invalid Tracking Number

• Double-check every character
• Ensure it’s a UPS number
• Allow 24 hours for new numbers to activate

No Tracking Updates

• The package might not be scanned yet
• Contact the shipper for confirmation

Wrong or Missing Info

• Recheck the number
• Call UPS support: 1-800-PICK-UPS

Lost Tracking Number

• Ask the sender or retailer
• Use the “Track by Reference” tool on UPS’s site

UPS Tracking FAQs (Validation, Errors & More)

Q: Can I track without a tracking number?
A: Yes, use the "Track by Reference" feature with an order or invoice number.

Q: What does “Adult Signature Required” mean?
A: Someone aged 21+ must sign for the delivery.

Q: Why hasn't my number updated?
A: It may not be scanned yet, or there may be a delay. Confirm with the shipper.

Q: Can I redirect a package after shipping?
A: Yes, with UPS My Choice or by contacting UPS — note that restrictions may apply.

Additional Resources

• UPS Website
• UPS Mobile App
• UPS My Choice
• Customer Service: 1-800-PICK-UPS
• UPS on X

For further assistance, contact UPS directly or visit their help center.