While both Visa and Mastercard are accepted almost everywhere, they have distinct numbering patterns and validation rules that developers need to account for when building payment forms.
Numbering Patterns
Visa card numbers always start with 4. Mastercard numbers typically start with digits in the 51-55 range or the 2221-2720 range.
đĄ Fact: Our Card Generator correctly applies these BIN rules to ensure your test data is as realistic as possible.
Validation Differences
Both use the Luhn algorithm, but the Bank Identification Number (BIN) length and account number length can vary. Mastercard has recently expanded its 2-series BINs, which some older validation scripts might fail to recognize.
Conclusion
Always test with multiple card networks to ensure your application handles global payment standards correctly.