Identifier Functions

/ABANumber/check/valid

Check validity of ABA Number (or Routing Transit Number (RTN)). More info here 

/CUSIP/check/valid

Check validity of CUSIP (North American Securities). More info here 

/EAN13/check/valid

Check validity of EAN-13 / UPC / ISBN-13. More info here 

/ISBN/check/valid

Check validity of ISBN-10 and ISBN-13. More info here 

/ISBN10/check/valid

Check validity of ISBN-10. More info here 

/ISBN13/check/valid

Check validity of ISBN-13. More info here 

/ISIN/check/valid

Check validity of ISIN (International Securities Identifying Number). More info here 

/Luhn/check/valid

Modulus 10 Luhn Check Digit calculation/validation. Luhn check digits are used, for example, by:

• Credit Card Numbers
• IMEI Numbers - International Mobile Equipment Identity Numbers Check digit calculation is based on modulus 10 with digits in an odd position (from right to left) being weighted 1 and even position digits being weighted 2 (weighted values greater than 9 have 9 subtracted). More info here 

/SEDOL/check/valid

Check validity of SEDOL (UK Securities). More info here 

/Verhoeff/check/valid

Check validity of Verhoeff (Dihedral) number. More info here