Text size:
S M L
Letter spacing:

FinFIRST Blogs

Credit Card

Where can you find your credit card number and what do its digits mean?

Key Takeaways

A credit card number is typically a 14- to 16-digit sequence used to identify a credit card during transactions.
Different sections of the number can identify the card network, issuing institution and individual card or account.
The final digit is a check digit that can be validated using the Luhn algorithm.
You may be able to find your credit card number through your physical card, banking app, net banking, statement or other authorised channels.
Credit card numbers, CVV, PIN and OTPs are sensitive information and should be protected from unauthorised access or sharing.

25 Aug 2026 by Team FinFIRST

Credit Card Number - Meaning and How it is Generated

Apply Now

Your credit card number is more than a string of digits printed on your card. It helps identify your card during transactions and contains information linked to the card issuer and your account.

Knowing how to locate and verify your credit card number can be useful when making online payments, managing your card through banking services, or accessing your card details when the physical card isn't readily available.

This guide explains how credit card numbers are structured, where you can find them, how they are validated, and the precautions you should take when accessing or sharing your card details.

Different types of Credit Cards and their features

What details does a Credit Card statement provide?

What Is a Credit Card Number?

A credit card number is a unique sequence of digits associated with a credit card. It is used to identify the card when you make purchases, payments or other card-based transactions.

Most credit card numbers contain 14 to 16 digits, although the exact length can vary depending on the card network and issuer.

The number is not simply a random sequence. Different portions of it serve different purposes, including identifying the card network or issuer and the individual card or account.

What Do the Digits on a Credit Card Number Mean?

A credit card number is divided into different sections, with each section serving a specific function.

First Digit: Major Industry Identifier

The first digit is known as the Major Industry Identifier (MII). For payment cards, it identifies the card network the card operates on. For example, cards beginning with 4 are Visa, while those beginning with 5 are Mastercard. RuPay cards typically begin with 6.

Next 6 Digits: Issuer Identification Number (IIN/BIN)

The first six digits form the Issuer Identification Number (IIN), also commonly known as the Bank Identification Number (BIN). This includes the Major Industry Identifier as the first digit. Together, these six digits identify the card issuer and the payment network.

Remaining Digits: Account Identifier

The remaining digits identify the individual card or account associated with the cardholder. The number of digits in this section can vary depending on the card's numbering system.

Last Digit: Check Digit

The final digit is known as the check digit. It is used as part of the Luhn algorithm to check whether the card number follows a valid numerical pattern.

What Are the Other Important Details on a Credit Card?

Besides the card number, a credit card contains other information that may be required for transactions.

Credit Card Number

The card number identifies the card or account associated with a transaction.

Expiry Date

The expiry date indicates the period during which the card remains valid. It may be required when making certain online transactions.

CVV

The Card Verification Value (CVV) is a security code generally found on the back of a physical card. It may be required to verify certain online transactions.

How Are Credit Card Numbers Validated?

The Luhn algorithm is a mathematical formula commonly used to validate card numbers. It checks the digits against a specific calculation and can help detect common errors, such as an incorrectly entered digit.

However, passing a Luhn check does not confirm that a credit card is active, genuine or authorised for transactions. It only indicates that the number passes the mathematical validation.

Where Can You Find Your Credit Card Number?

You can usually find your credit card number on the physical card. If you don't have the card with you, you may also be able to access available card information through authorised banking channels.

On Your Physical Credit Card

Depending on the card design, the credit card number may appear on the front or back of the card. Some newer cards may not display the complete number for security reasons.

Through Mobile Banking or Net Banking

Your bank's official mobile banking app or net banking platform may allow you to view or manage your credit card details. The information displayed may be masked for security.

On Your Credit Card Statement

Your credit card statement may include your card or account information. However, statements may show only a masked portion of the card number.

Through a Digital Wallet

If you have added your credit card to an authorised digital wallet, you may be able to access limited card information. Digital wallets typically use tokenised or masked card details rather than displaying the complete card number.

How to Protect Your Credit Card Details?

Your credit card number and other card details should be treated as sensitive financial information.

Use Authorised Banking Channels

Access your card information only through your bank's official website, mobile app or other authorised channels.

Don't Share Your CVV, PIN or OTP

Never share your CVV, PIN or OTP with anyone, even if they claim to represent your bank.

Be Careful When Saving Card Details Online

Only save your card details on trusted websites and applications. Avoid entering card information through suspicious links or unverified platforms.

Report Suspicious Transactions

If you notice an unfamiliar transaction or believe your card details may have been compromised, contact your card issuer through its official channels immediately.

How to Find Your IDFC FIRST Bank Credit Card Number?

If you have an IDFC FIRST Bank credit card, you can manage your card through the bank's authorised digital banking channels.

You may be able to access available card details through the IDFC FIRST Bank mobile app or net banking. You can also check your credit card statement or contact IDFC FIRST Bank customer service if you need assistance.

For security reasons, always use official IDFC FIRST Bank channels when accessing or verifying your credit card information.

Frequently Asked Questions About Credit Card Numbers

How many digits does a credit card number have?

A credit card number commonly contains 14 to 16 digits, although the exact length depends on the card network and issuer.

What do the first digits of a credit card number mean?

The first digit is the Major Industry Identifier (MII), while the following digits form part of the Issuer Identification Number (IIN), also known as the Bank Identification Number (BIN).

What is a BIN or IIN?

BIN or IIN refers to the initial portion of a card number used to identify the card issuer and payment network.

What is the Luhn algorithm?

The Luhn algorithm is a mathematical method used to check whether a card number follows a valid numerical pattern. It can detect certain input errors but does not confirm that a card is active or usable.

Can I find my credit card number without the physical card?

You may be able to access available card information through your bank's mobile app, net banking, statements or other authorised services. The complete card number may not always be displayed for security reasons.

Is a credit card number the same as a bank account number?

No. A credit card number identifies a credit card, while a bank account number identifies a banking account. They serve different purposes.

Is it safe to share my credit card number?

You should share your credit card details only when necessary and through trusted payment channels. Never share sensitive authentication details such as your CVV, PIN or OTP.

What should I do if I lose my credit card?

Contact your card issuer through its official channels and block or temporarily disable the card as soon as possible. You can then follow the issuer's process for replacing the card.

The features, benefits and offers mentioned in the article are applicable as on the day of publication of this blog and is subject to change without notice. The contents herein are also subject to other product specific terms and conditions and any third party terms and conditions, as applicable. Please refer our website www.idfcfirst.bank.in for latest updates.