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Tracking Code Validator

Validate and identify tracking codes from Correios, FedEx, DHL, UPS and other carriers instantly. Detect carrier automatically.

No sign-up 100% free Private
Supported Formats
Carrier Format Example Regex

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Tracking Code Validator — Verify Postal Tracking Numbers Instantly

The Tracking Code Validator checks whether a postal tracking number follows the correct format for carriers such as Correios (Brazil), USPS, Royal Mail, and other international postal services. It identifies the carrier, validates the check digit, and provides format details.

International postal tracking codes follow the S10 standard defined by the Universal Postal Union (UPU), consisting of 13 characters: 2 letters (service type), 9 digits (8 serial + 1 check digit), and 2 letters (country code). The tool validates the check digit using the weighted modulo algorithm specified in the S10 standard. It also recognizes carrier-specific domestic formats like USPS 22-digit codes and Correios e-Sedex formats.

E-commerce sellers use this tool to verify tracking numbers before sharing them with customers. Logistics coordinators validate codes when processing shipping manifests. Online shoppers check whether a tracking number they received is valid and identify which carrier handles the shipment.

Tracking Code Validator is part of the facilita.tools suite of free browser-based logistics utilities. Available in Portuguese, English, and Spanish, optimized for desktop and mobile browsers.

Frequently Asked Questions

Which carriers' tracking formats are supported?
The tool validates UPU S10 international codes used by Correios, Royal Mail, China Post, and others. It also recognizes USPS domestic formats and Correios-specific e-Sedex patterns.
Does it track my package location?
No. This tool only validates whether the tracking code format and check digit are correct. To track a package, visit the carrier's official tracking page with the validated code.
How does the check digit validation work?
The S10 standard uses a weighted sum of the 8 serial digits with multipliers 8, 6, 4, 2, 3, 5, 9, 7. The result modulo 11 produces the check digit, with special rules for remainders 0 and 1.