Regular Expressions 101

Spon⁠sors

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Regular ExpressionOpen Workspace

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(^4(?:\d?){3}\s?(?:\d?){4}\s?(?:\d?){4}(?:\s?\d?){7}$)|(^(?:5[1-5](?:\d?){2}\s?|222\d?\s?|22[3-9]\d?\s?|2[3-6](?:\d?){2}\s?|27[01]\d?\s?|2720\s?)(?:(?:\d?){4}\s?){2}(?:\d?){4}$)|(^3[47](?:\d?){2}\s?(?:(?:\d?){4}\s?(?:\d?){2}\s?(?:\d?){2}\s?)(?:\d?){3}$)|(^3(?:0[0-5]|[68]\d?)\d?\s?(?:(?:\d?){4}\s?(?:\d?){2}\s?(?:\d?){2}\s?)(?:\s?\d?){7}$)|(^6(?:011\s?|5(?:\d?){2}\s?)(?:(?:\d?){4}\s?){3}(?:\d?\s?){3}$)|(^(?:2131\s?|1800\s?|35(?:\d?){2}\s?\d?\s?)(?:\d?\s?){14}$)
/
gm

Description
Created·2024-10-14 20:03
Updated·2024-10-16 18:23
Type·Substitution
Flavor·JavaScript

Credit Card Carrier Prediction

This regex is specifically designed to predict from the first few characters which carrier type the credit card number is.

Submitted by Anonymous
Open Workspace