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September 11, 2026Short & citedBlog
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How It Works • E-Commerce

Amazon Standard Identification Number

An Amazon Standard Identification Number (ASIN) is a unique 10-character alphanumeric code Amazon assigns to products in its store.

Updated September 11, 20261 min readCited sources

An Amazon Standard Identification Number (ASIN) is a unique 10-character alphanumeric code Amazon assigns to products in its store. It is used internally to identify, organize, and track listings, including product variations.

What it is

ASIN stands for Amazon Standard Identification Number. It is a 10-character alphanumeric identifier used within Amazon’s system to distinguish products. Amazon uses ASINs to identify product detail pages, group offers for the same item, and support catalog, inventory, advertising, and review management.

Why it matters

ASINs help Amazon track listings, inventory, product detail pages, and product variations. The same product generally shares the same ASIN across sellers on Amazon. ASINs can apply to product versions and variations such as sizes or colours, helping Amazon associate related offers with the correct listing.

Key details

Unlike UPC or EAN codes, ASIN is Amazon-specific rather than a global standard. For books, Amazon often uses the ISBN as the ASIN. Canadian readers who sell on Amazon.ca or use Amazon marketplaces encounter ASINs in product listings, catalog management, and advertising workflows.

In short

  • Unique 10-character alphanumeric code for Amazon products.
  • Used to organize catalog, track inventory, and manage variations.
  • Same product shares same ASIN across sellers.
  • For books, ASIN often equals ISBN.
Canadian angle

Canadian readers who sell on Amazon.ca or use Amazon marketplaces encounter ASINs in product listings, catalog management, and advertising workflows.

Quick questions

What does ASIN stand for?
ASIN stands for Amazon Standard Identification Number.
How long is an ASIN?
An ASIN is 10 characters long and uses letters and numbers.
Is ASIN a global product standard?
No. ASIN is Amazon-specific and is used inside Amazon’s own marketplace system.

Sources

  1. Amazon — https://sell.amazon.com/blog/what-is-an-asin
    Supports: ASIN meaning and 10-character product identifier
  2. UPCgen — https://upcgen.com/es/learn/what-is-asin
    Supports: ASIN format, Amazon-specific internal use, and catalog functions
  3. Lumina — https://www.get-lumina.com/glossary/asin
    Supports: Same product sharing ASIN across sellers
  4. Wikipedia — https://en.wikipedia.org/wiki/Amazon_Standard_Identification_Number
    Supports: ASIN history, relationship to ISBN, and product detail page URL use
  5. Dictionary.com — https://www.dictionary.com/browse/asin
    Supports: Definition of ASIN as Amazon Standard Identification Number
  6. DataFeedWatch — https://www.datafeedwatch.com/blog/amazon-asin-number-what-is-it-and-how-do-you-get-it
    Supports: Books using ISBN and ASIN lookup context
  7. Amazon Ads — https://advertising.amazon.com/library/guides/asins-introduction
    Supports: ASIN role in product detail pages, variations, inventory, and advertising