ISBN Lookup

ISBN-13 Format

Modern ISBNs consist of 13 digits divided into 5 parts:

• 978/979: EAN prefix
• 3: Registration group (country/language)
• 16: Registrant (publisher)
• 148410: Publication (specific edition)
• 0: Check digit

What is an ISBN?

ISBN stands for International Standard Book Number. It's a unique numeric commercial book identifier that's assigned to each edition and variation of a book. The ISBN is 13 digits long (10 digits for books published before 2007).

What's the difference between ISBN-10 and ISBN-13?

ISBN-10 was the standard format until 2007, consisting of 10 digits. ISBN-13 is the current standard, beginning with the prefix 978 or 979. All ISBN-10s can be converted to ISBN-13s, but not all ISBN-13s can be converted back to ISBN-10s.

Where can I find a book's ISBN?

The ISBN is typically printed on the back cover of a book above the barcode. It can also be found on the copyright page (usually one of the first few pages of the book), often near the publisher information.