ISBN 9645678918 hat failed the check­sum digit test.
The following 17 formally correct ISBNs were determined. Starting from these ISBNs the value 9645678918 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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Tiu ĉi paĝo en Esperanto (Unikodo)
Tiu cxi pagxo en Esperanto (x-igata)
ISBN prefix group: Japan
ISBNas­su­med er­rorCatalogs for checking
4-695-67891-81st and 3rd digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: China, People's Republic
ISBNas­su­med er­rorCatalogs for checking
7-6456-9891-81st and 6th digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: former Yugoslavia
ISBNas­su­med er­rorCatalogs for checking
86-456-7891-8first digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Netherlands
ISBNas­su­med er­rorCatalogs for checking
90-456-7891-8second digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Greece
ISBNas­su­med er­rorCatalogs for checking
960-567-891-8third digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Iran
ISBNas­su­med er­rorCatalogs for checking
964-2678-91-8fourth digit was chan­ged. amazon.co.uk amazon.com amazon.de
964-5658-91-8sixth digit was chan­ged. amazon.co.uk amazon.com amazon.de
964-5670-91-8seven­th digit was chan­ged. amazon.co.uk amazon.com amazon.de
964-5678-21-8eighth digit was chan­ged. amazon.co.uk amazon.com amazon.de
964-5678-91-9tenth digit was chan­ged. amazon.co.uk amazon.com amazon.de
964-5678-97-8ninth digit was chan­ged. amazon.co.uk amazon.com amazon.de
964-5679-81-87th and 8th digits were swap­ped. amazon.co.uk amazon.com amazon.de
964-5687-91-86th and 7th digits were swap­ped. amazon.co.uk amazon.com amazon.de
964-5768-91-85th and 6th digits were swap­ped. amazon.co.uk amazon.com amazon.de
964-5878-91-8fifth digit was chan­ged. amazon.co.uk amazon.com amazon.de
964-6578-91-84th and 5th digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Israel
ISBNas­su­med er­rorCatalogs for checking
965-467-891-83rd and 4th digits were swap­ped. amazon.co.uk amazon.com amazon.de

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