Can I choose my own ASIN?

No. Amazon generates the ASIN automatically when a new product is added to the catalog. If the product already exists, you match the existing ASIN instead. Sellers control their own SKUs, which can be any internal code, but not the ASIN itself.

Is an ASIN the same as a UPC?

No. A UPC is a global barcode number licensed from GS1 and used by many retailers. An ASIN is Amazon's own identifier, used only inside Amazon. A UPC is often used to create or match an ASIN, but they are separate numbers.

How do I find the ASIN of a product?

Look at the product page URL, where the ASIN appears after /dp/, or scroll to the product details section. Sellers can also find their ASINs on the Manage All Inventory page in Seller Central and in business and advertising reports.

Do I need a UPC to get an ASIN?

Usually you need a GTIN such as a UPC or EAN to create a new ASIN. If your product has none, you may qualify for a GTIN exemption, and brand owners in Brand Registry can often list their own products without GTINs.

What is the difference between a parent and child ASIN?

A parent ASIN groups variations, such as sizes or colors, and is not purchasable on its own. Each child ASIN is a buyable option with its own price and inventory. Shoppers see one detail page with selectors for the variations.

What Is an ASIN? Amazon's Product ID Explained (2026)

What changed: Amazon's unique 10-character identifier for each catalog product
When: Updated October 2026
Who it affects: Amazon sellers, vendors, brand owners and shoppers
What to do: Match existing ASINs before creating new listings

Key takeaways

An ASIN is Amazon's unique 10-character product ID; books usually use the ISBN-10.
Sellers match existing ASINs and only create new ones for products new to Amazon.
ASIN, SKU and GTIN do different jobs; keep all three organized.

Product IDs compared

	ASIN	SKU	GTIN or UPC
Created by	Amazon	You	GS1 license
Scope	Amazon only	Your account	Global
Format	10 characters	Your choice	Up to 14 digits
Shared by sellers

ASIN meaning and format

ASIN stands for Amazon Standard Identification Number. Amazon describes it as a unique 10-character alphanumeric code assigned to every product listed in the Amazon store. Typical examples look like B07FZ8S74R. Books are different: their ASIN usually begins with a number because it is based on the ISBN-10, though Amazon's own help notes this is no longer guaranteed now that 13-digit ISBNs are common.

Each ASIN represents one detail page. Many sellers can offer the same ASIN, which is how several offers appear under a single product.

Where to find an ASIN

In the product page URL, right after /dp/
In the product details or product information section of the page
In Seller Central, on the Manage All Inventory page
In business reports, advertising reports and inventory reports
In Amazon's search bar: pasting an ASIN usually returns that product

How Amazon assigns ASINs

Sellers cannot choose an ASIN. When you create a new product that does not exist in the catalog, Amazon generates a new ASIN for it. When you list a product that already exists, you match it using the ASIN or a product ID such as a UPC or EAN, and your offer is added to the existing detail page. Creating a duplicate page for a product that already has an ASIN is against Amazon's listing rules.

ASIN vs SKU vs UPC vs GTIN

These identifiers do different jobs. The GTIN family, including UPC, EAN, JAN and ISBN, is global: a GTIN is a number up to 14 digits, usually tied to a barcode, and it works across retailers. You license GTINs from GS1 when you create your own product. The ASIN is Amazon-only. The SKU is your own internal code, unique to your seller account, so two sellers on the same ASIN each have their own SKU. FBA adds an FNSKU, the label Amazon uses to track your units in its warehouses.

How to create a new ASIN, step by step

If your product is genuinely new to Amazon, you create the ASIN by listing it.

Search the catalog by product ID and title to confirm it does not exist
In Seller Central, choose Add a Product, then create a new listing
Enter a GTIN, or apply for a GTIN exemption if your product has none
Choose the right product type and fill in required attributes
Add title, bullets, images, price and quantity
Submit; Amazon assigns the ASIN once the listing is processed

Create a new ASIN

1Search first
Avoid duplicates
2Add a Product
Create new listing
3Enter GTIN
Or apply for exemption
4Complete attributes
Title, bullets, images
5Submit
Amazon assigns the ASIN

GTIN exemptions

Products without a barcode, such as some handmade or private label items, may qualify for a GTIN exemption. Amazon's flow asks you to tick a box saying you do not have a product ID, then apply with the product name and images showing all sides of the product and packaging. Eligibility depends on brand and category, and Brand Registry owners can often list without GTINs for their own brand.

Parent and child ASINs

Variations use a parent ASIN that groups child ASINs for each size, color or other option. Shoppers see one page with selectors, while each child keeps its own ASIN, price, inventory and reviews shared at the family level. Setting variations up correctly keeps reviews together and makes advertising easier. Our Amazon variations guide explains the rules.

Is an ASIN the same in every Amazon marketplace?

Often, but not always. Many products keep the same ASIN across Amazon marketplaces, especially when linked through the same GTIN, but a product can also have different ASINs in different stores. When expanding abroad, check each marketplace rather than assuming. See our guide to Amazon international expansion.

Why ASINs matter for advertising and reporting

Almost every Amazon report is organized by ASIN. Sponsored Products ads advertise specific ASINs, product targeting lets you show ads on competitor ASINs, and business reports show sessions, conversion and sales per ASIN. Sellers who track performance at ASIN level can see which products deserve more budget, which need listing fixes and which are close to a stockout.

Keep a simple map of each ASIN, its SKUs, FNSKU, GTIN and parent ASIN. It saves hours when you troubleshoot listings or brief an agency, and it makes ASIN-level profit tracking much easier.

Ads target and report by ASIN
Product targeting uses competitor ASINs
Keep an ASIN, SKU and GTIN map

ASIN problems sellers run into

Common issues include duplicate ASINs for the same product, wrong product data attached to your ASIN by another contributor, a suppressed or inactive listing, or an ASIN-level policy suspension. Brand Registry gives brand owners more control over detail page content. Our guides to ASIN suspension and listings not showing cover fixes.

How PPC Spider helps

PPC Spider's account health and catalog work fixes ASIN errors, merges variations and keeps detail pages accurate. SpiderOS monitors listings, stock, bids and search terms by ASIN so problems surface fast. Start with a free Amazon audit.

Sources

Amazon: Understanding ASIN numbers (sell.amazon.com/blog/what-is-an-asin)
Amazon: What are product IDs or GTINs? (sell.amazon.com/blog/amazon-gtin-guide)
Amazon Seller Central: Product ID (GTIN) requirements for books (sellercentral.amazon.com/help/hub/reference/external/G200786200)

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