ISBN 3499450688 hat failed the check­sum digit test.
The following 15 formally correct ISBNs were determined. Starting from these ISBNs the value 3499450688 that you input could have resulted frome one error (error in one digit or transposition of two digits.) You can now check using the links given for the catalogs of amazon.co.uk, amazon.com and amazon.de whether any book is listed for the respective URL. To the home page
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ISBN prefix group: German language
ISBNas­su­med er­rorCatalogs for checking
3-409-45068-8third digit was chan­ged. amazon.co.uk amazon.com amazon.de
3-489-45069-83rd and 9th digits were swap­ped. amazon.co.uk amazon.com amazon.de
3-495-45068-8fourth digit was chan­ged. amazon.co.uk amazon.com amazon.de
3-498-45068-94th and 10th digits were swap­ped. amazon.co.uk amazon.com amazon.de
3-499-35068-8fifth digit was chan­ged. amazon.co.uk amazon.com amazon.de
3-499-45048-8eighth digit was chan­ged. amazon.co.uk amazon.com amazon.de
3-499-45065-8ninth digit was chan­ged. amazon.co.uk amazon.com amazon.de
3-499-45068-2tenth digit was chan­ged. amazon.co.uk amazon.com amazon.de
3-499-45468-8seven­th digit was chan­ged. amazon.co.uk amazon.com amazon.de
3-499-45860-87th and 9th digits were swap­ped. amazon.co.uk amazon.com amazon.de
3-499-46068-8sixth digit was chan­ged. amazon.co.uk amazon.com amazon.de
3-499-85064-85th and 9th digits were swap­ped. amazon.co.uk amazon.com amazon.de
3-7994-5068-8second digit was chan­ged. amazon.co.uk amazon.com amazon.de
3-949450-68-82nd and 3rd digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Netherlands
ISBNas­su­med er­rorCatalogs for checking
94-99450-68-8first digit was chan­ged. amazon.co.uk amazon.com amazon.de

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