ISBN 812370249X hat failed the check­sum digit test.
The following 15 formally correct ISBNs were determined. Starting from these ISBNs the value 812370249X 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: English language
ISBNas­su­med er­rorCatalogs for checking
0-12-378249-X1st and 6th digits were swap­ped. amazon.co.uk amazon.com amazon.de
1-82370-249-X1st and 2nd digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Japan
ISBNas­su­med er­rorCatalogs for checking
4-12-370249-Xfirst digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: India
ISBNas­su­med er­rorCatalogs for checking
81-227-0249-Xfourth digit was chan­ged. amazon.co.uk amazon.com amazon.de
81-230-7249-X5th and 6th digits were swap­ped. amazon.co.uk amazon.com amazon.de
81-234-0249-Xfifth digit was chan­ged. amazon.co.uk amazon.com amazon.de
81-237-0240-Xninth digit was chan­ged. amazon.co.uk amazon.com amazon.de
81-237-0249-3tenth digit was chan­ged. amazon.co.uk amazon.com amazon.de
81-237-0299-Xeighth digit was chan­ged. amazon.co.uk amazon.com amazon.de
81-237-0349-Xseven­th digit was chan­ged. amazon.co.uk amazon.com amazon.de
81-237-3249-Xsixth digit was chan­ged. amazon.co.uk amazon.com amazon.de
81-247-0239-X4th and 8th digits were swap­ped. amazon.co.uk amazon.com amazon.de
81-273-0249-X4th and 5th digits were swap­ped. amazon.co.uk amazon.com amazon.de
81-8370-249-Xthird digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Poland
ISBNas­su­med er­rorCatalogs for checking
83-217-0249-X2nd and 4th digits were swap­ped. amazon.co.uk amazon.com amazon.de

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