Credit Card Number

There is a stand-alone regex policy for Credit Card Number(s), but several other policies use the same algorithm as an identifier for PII. It identifies potentially valid credit card numbers using the Luhn algorithm. Lenient, Moderate and Strict Tolerances are supported with Strict Tolerance as the default.

##Lenient Tolerance

• Luhn check applied
• No proximity requirement
• Common patterns accepted:
  1800\d{11}, 4\d{12}, 2131\d{11}, 2014\d{11}, 2014 \d{6} \d{5}, 2014-\d{6}-\d{5}, 2014. \d{6}. \d{5}, 2149\d{11}, 2149 \d{6} \d{5}, 2149-\d{6}-\d{5}, 2149. \d{6}. \d{5}, 3[068]\d{12}, 3[068]\d{2} \d{6} \d{4}, 3[068]\d{2}-\d{6}-\d{4}, 3[068]\d{2}. \d{6}. \d{4}, 3[47]\d{13}, 3[47]\d{2} \d{6} \d{5}, 3[47]\d{2}- \d{6}-\d{5}, 3[47]\d{2}. \d{6}. \d{5}

Accepts 16-digit and some 15-digit numbers in groups separated by a space, dash, period, or without separation.
• [1-9]\d{15}
• [1-9]\d{3} \d{4} \d{4} \d{4}
• [1-9]\d{3}-\d{4}-\d{4}-\d{4}
• [1-9]\d{3}. \d{4}. \d{4}. \d{4}

##Moderate Tolerance

• Luhn check applied
• No proximity requirement
• Accepts common patterns (listed in Lenient Tolerance)
• Accepts 16-digit and some 15-digit numbers in groups separated by a space, dash, or period, or without separation, for specified card issuers

JCB

VISA

Mastercard

Discover

Excludes the following from being returned as matches as they are not in general use:

Strict Tolerance (default)

All the same as Moderate Tolerance, with the addition of the following proximity keywords, with proximity value set to 10 terms: