iValidCard - Credit Card and Debit Card Number Validator 1
the author of this app says:
iValidCard allows you to detect fraudulent credit and debit cards by validating the integrity of the credit or debit card number sequence. iValidCard also identifies the card issuer without transmitting any information. iValidCard does not validate the account of the credit or debit card and is not affiliated with the card issuer. Card issuers include but not limited to Visa, Mastercard, Discover, JCB, etc.
- Requires iOS 2.2.1 or later.