Namso Gen is a free online generator for credit card numbers with CVV and MM/YYYY for testing and development. Our Payment System Test Number Generator uses the industry-standard Luhn Algorithm (MOD 10) to create numbers that pass standard verification checks while remaining non-functional for real transactions.

What are the key parameters?

The key parameters include: 1) Bank Identification Number (BIN) - The first 6 to 8 digits of a card number that represent the issuing bank or financial institution. 2) Expiration Date (MM/YYYY) - The standard format expiration date. 3) Card Verification Value Code (CVV) - A 3 or 4-digit security number. 4) Quantity - Default is 10 cards per request, customizable based on needs.

How to generate credit cards?

1. Enter a valid 6-8 digit BIN 2. Optionally set the Expiration Date and CVV parameters 3. Choose quantity of cards 4. Click the 'Generate' button

What are the main features?

Namso Gen features include: 1) Support for all major credit cards (Visa, Mastercard, American Express) 2) BIN-based generation 3) Multiple test case generation 4) Luhn Algorithm validation ensuring all generated numbers pass standard verification checks

What are the common use cases?

Namso Gen is primarily used in development and testing of payment processing systems, quality assurance, and compliance testing. It's particularly useful for web developers testing payment systems and for compliance testing in finance, e-commerce, payment gateways, and fraud detection systems.

Is this legal to use?

All random credit cards generated by Namso Gen are structurally valid but do not hold any actual balance and cannot be used for online payments and real transactions. Any attempt to use these generated card numbers for actual purchases is strictly prohibited and illegal. Namso Gen complies with international data protection laws and does not collect or hold any personal information.

A secure testing tool for payment system developers and QA professionals. All test numbers are non-functional and strictly for development environments.

BIN 223257: ITAU UNIBANCO, S.A.

Issued by ITAU UNIBANCO, S.A. 🇧🇷 Brazil. This page shows the BIN details and lets you generate structurally valid Mastercard test numbers from the same prefix.

*All random cards generated are structurally valid but have no actual balance and cannot be used for online payments or real transactions. Any attempt to use these test card numbers for actual purchases is strictly prohibited and illegal. For more details, visit our Terms of Service.

BIN details

BIN / IIN: 223257
Network: Mastercard
Card type: Credit
Number length: 16 digits
Issuer: ITAU UNIBANCO, S.A.
Issuing country: 🇧🇷 Brazil (BR)
Card level: Platinum
Data last confirmed: 2025-02-11
Source: Open BIN dataset (binlist.io / Techbuddie Solutions, CC BY 4.0)

Example numbers from BIN 223257

These examples were generated with the Luhn algorithm. They are structurally valid but have no balance and cannot be charged.

2232 5745 6925 3917
2232 5772 0001 9506
2232 5726 7031 7019
2232 5713 6802 0133
2232 5736 0803 1730

Refresh the page for a new set, or generate cards in bulk with the form above.

About BIN 223257

223257 is the first six digits of a Mastercard card number. The range is attributed to ITAU UNIBANCO, S.A. in Brazil. The BIN (Bank Identification Number), formally called the IIN (Issuer Identification Number), tells payment systems which network and institution a card belongs to.

Issuer BIN ranges are reassigned over time, so always confirm critical decisions with the card network or your acquirer. Want to classify another prefix? Use the BIN checker. Looking for provider-specific test numbers? See the test card numbers reference. Need to validate a full number? Try the Luhn validator.

FAQ

Which bank issued BIN 223257?: According to the open BIN dataset, BIN 223257 is attributed to ITAU UNIBANCO, S.A. in Brazil. Banks rename and BIN ranges move, so treat this as a best-effort reference.
Can I use BIN 223257 for real payments?: No. These numbers are for testing only. They have no balance and cannot be charged. Attempting real transactions with numbers you do not own is illegal.
Do the generated numbers pass Luhn validation?: Yes. Every number is generated with a valid check digit, so it passes the Luhn (MOD 10) check — exactly like a real card number would.
Will my gateway accept these numbers?: In test mode, gateways typically accept only their own documented test numbers. Generated numbers are best for validating formatting, Luhn checks, storage and UI behaviour.

Issuer and country data on this page comes from the open binlist dataset (CC BY 4.0, merged from iannuttall/binlist-data and venelinkochev/bin-list-data). It is not an official IIN register and may lag bank renames or BIN reassignments.

BIN 223257: ITAU UNIBANCO, S.A.

BIN details

Example numbers from BIN 223257

About BIN 223257

FAQ

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