Flutter Detect Credit Card

Flutter Detect Credit Card

credit_card_type_detector | Credit Card Type Detector

A Dart package that detects credit card types based on the current credit card number patterns

This is a port from Braintree’s credit-card-type module

Flutter Detect Credit Card


  1. Add dependency to your pubspec.yaml

    Get the current version in the ‘Installing’ tab on pub.dartlang.org

    credit_card_type_detector: ^1.0.2
  2. Import the package

    import 'package:credit_card_type_detector/credit_card_type_detector.dart';


import 'package:credit_card_type_detector/credit_card_type_detector.dart';

String visa = "4647 7200 6779 1032";

var type = detectCCType(visa);

assert(type == CreditCardType.visa)

Check out the example app in the example directory or the ‘Example’ tab on pub.dartlang.org for a more complete example using the BLoC pattern


No external dependencies

Supported cards:

* Visa
* Mastercard
* American Express
* Discover
* Diners Club
* Union Pay
* Maestro
* Mir
* Elo
* Hiper/Hipercard

Pattern Detection

Each card type has a corresponding list of patterns. See the cardNumPatterns map.
Each pattern is an array of strings that represents a range of numbers or a single number. These numbers correspond to the Issuer Identification number (IIN) for the credit card company.

If the pattern is an array with a single number, the package compares it against the card number. Partial matches for card numbers that are shorter than the pattern also match. I.e. given the pattern 123, then the card numbers 1, 12, 123, 1234 will all match, but 2, 13, and 124 will not.

If the pattern is an array of numbers, then the card number is checked to be within the range of those numbers. Again, partial matches are accepted. I.e. given the range [100, 123], then the card numbers 1, 10, 100, 12, 120, 123 will all match, but 2, 13, and 124 will not.

The package loops over every card type and everyone of its corresponding patterns.


detectCCType(String number)

Returns: A CreditCardType enum.

I.e. CreditCardType.visa for any card number that starts with ‘4’.


Tanner Davis (Cholojuanito) – Creator and repo ownerGithub Profile


This project is licensed under the MIT License – see the LICENSE file for more details

Source Code

Please Visit Flutter Detect Credit Card Source Code at GitHub