ISBN 807217246X hat failed the check­sum digit test.
The following 14 formally correct ISBNs were determined. Starting from these ISBNs the value 807217246X 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: China, People's Republic
ISBNas­su­med er­rorCatalogs for checking
7-08-217246-X1st and 3rd digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: former Czechoslovakia
ISBNas­su­med er­rorCatalogs for checking
80-421-7246-Xthird digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-7210-246-Xsixth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-7217-245-Xninth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-7217-246-8tenth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-7217-276-Xeighth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-7217-746-Xseven­th digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-7247-216-X5th and 8th digits were swap­ped. amazon.co.uk amazon.com amazon.de
80-7267-241-X5th and 9th digits were swap­ped. amazon.co.uk amazon.com amazon.de
80-7287-246-Xfifth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-7617-242-X4th and 9th digits were swap­ped. amazon.co.uk amazon.com amazon.de
80-7817-246-Xfourth digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: India
ISBNas­su­med er­rorCatalogs for checking
81-7217-246-Xsecond digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: former Yugoslavia
ISBNas­su­med er­rorCatalogs for checking
86-7217-240-X2nd and 9th digits were swap­ped. amazon.co.uk amazon.com amazon.de

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