DUN-14 Checker Guide – Validate Logistics Barcodes Effortlessly

What Is a DUN‑14 Barcode?

The DUN‑14 (Distribution Unit Number 14) is a 14‑digit GS1 identifier used for logistics units like cartons and pallets. It is commonly encoded in EAN‑128 / GS1‑128 barcodes for shipping, receiving, and warehouse tracking. Its structure:

• Digit 1 (Packaging Indicator) – value 1–8 (1 = inner pack, 2 = pallet, 3–8 = other levels). It defines the logistics hierarchy.
• Digits 2–13 (GTIN Core) – 13 digits: typically the first 12 digits of a GTIN‑13 (or GTIN‑12 padded with a leading zero) without its own check digit.
• Digit 14 (Check Digit) – calculated from the first 13 digits using the standard mod‑10 (weighted 3/1) algorithm.

Example: in 10614141234567, 1 is the indicator, 061414123456 is the GTIN core, and 7 is the check digit.

How to Use This DUN-14 Checker

Three simple steps to verify your DUN‑14:

1. Paste or type the 14‑digit number (input field auto‑filters to digits only, max 14).
2. Click the Validate button.
3. Read the result – the DUN-14 Checker tells you if the format is valid and whether the check digit matches.

Try the sample numbers to get a feel. If something is off (wrong length, invalid first digit, or check digit mismatch), the tool gives clear feedback.

This DUN-14 Checker is completely free, no registration required – ideal for logistics managers, warehouse staff, and EDI professionals.

Frequently Asked Questions

1. Does a valid DUN‑14 guarantee that the unit actually exists?

This DUN-14 Checker validates structural correctness and the mod‑10 check digit. A “valid” result means the number complies with GS1 standards. To confirm physical existence in the supply chain, you’ll need to check with the supplier or query a GS1 registry.

2. Why does my DUN‑14 come back as invalid?

Common reasons: length not 14, non‑digit characters, first digit outside 1‑8, or a mismatched check digit. For example, the check digit for 10614141234567 is computed by summing every odd‑position digit (from the right) multiplied by 3 and even positions by 1 – the total must be a multiple of 10. Double‑check your input, or test with the examples to ensure the DUN-14 Checker works correctly.

3. Can I validate DUN‑14 numbers in bulk?

This page is designed for single entries. For batch validation, integrate via our API endpoint /iso-checker with parameters type=dun14&number=yournumber.

4. What’s the difference between DUN‑14 and SSCC?

SSCC (Serial Shipping Container Code) is an 18‑digit serial number that uniquely identifies each transport container (each pallet or case gets a unique serial). In contrast, DUN‑14 identifies a product packaging type – it is not serialised, so all units of the same product share the same DUN‑14. DUN‑14 is used in EAN‑128, while SSCC is used for tracking individual shipments.

5. Is there any charge to use this DUN-14 Checker?

No – it’s 100% free. OkeyTool aims to provide practical online utilities for everyday use.

If you have other questions or spot any issues, please reach out via the contact links at the bottom of the site. Thanks for using our DUN-14 Checker!