Credit Card Glossary: Terms and Definitions
Issuer identification number (IIN)
If you look at a credit card’s numbers, the digits are divided into two parts. The first six digits are the issuer identification number. When you make a purchase with a credit card, the processing system first looks at the first six digits, which identify the issuer. The remaining digits identify your specific account.
Terms from A-Z
Search the CreditCards.com glossary for every credit-related term from "account holder" to "zombie debt." Select a letter for alphabetized terms and definitions.