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IBAN Checker — validate & verify

Check the country, length and ISO 7064 check digits of an International Bank Account Number, with a bank code and account number breakdown for common countries. No sign-up, and nothing is sent anywhere.

Step by step

How to validate an IBAN

It takes a few seconds and happens entirely on your device.

Paste the IBAN

Type or paste the IBAN into the field. Spaces and letter case don't matter — the checker formats it for you as you type.

Run the check

Select Check IBAN. The tool verifies the country code, length, allowed characters, and ISO 7064 check digits, all in your browser.

Read the breakdown

A valid IBAN is split into its country and check digits, plus a bank code and account number breakdown for common countries, so you can confirm each part is right.

Anatomy

What is an IBAN?

An IBAN (International Bank Account Number) is a standardised way to identify a bank account across borders. It has up to 34 characters: a two-letter country code, two check digits, and the country's domestic account number — known as the BBAN.

Country code

Check digits

3704 0044

Bank code

0532 0130 00

Account number

Under the hood

How IBAN validation works

A genuine IBAN check is four tests, not just a length count. Our tool runs all four.

Country & structure

The first two letters must be a valid ISO country code with a published IBAN format. The remaining characters are matched against that country's expected layout.

Length & characters

Each country has a fixed IBAN length. The tool confirms the count is exact and that only letters and digits are present — no symbols or spaces.

MOD-97-10 check digits

The ISO 7064 checksum catches transposed or mistyped characters. The first four characters move to the end, letters become numbers, and the result modulo 97 must equal 1.

Reference

IBAN length by country

IBAN length is fixed for each country. Here are common IBAN countries with a valid example for each — the checker supports 85+ in total.

Country	Code	Length	Example IBAN
🇩🇪 Germany	DE	22	DE89 3704 0044 0532 0130 00
🇬🇧 United Kingdom	GB	22	GB29 NWBK 6016 1331 9268 19
🇫🇷 France	FR	27	FR14 2004 1010 0505 0001 3M02 606
🇪🇸 Spain	ES	24	ES91 2100 0418 4502 0005 1332
🇮🇹 Italy	IT	27	IT60 X054 2811 1010 0000 0123 456
🇳🇱 Netherlands	NL	18	NL91 ABNA 0417 1643 00
🇧🇪 Belgium	BE	16	BE68 5390 0754 7034
🇨🇭 Switzerland	CH	21	CH93 0076 2011 6238 5295 7
🇦🇹 Austria	AT	20	AT61 1904 3002 3457 3201
🇮🇪 Ireland	IE	22	IE29 AIBK 9311 5212 3456 78
🇵🇹 Portugal	PT	25	PT50 0002 0123 1234 5678 9015 4
🇵🇱 Poland	PL	28	PL61 1090 1014 0000 0712 1981 2874
🇸🇪 Sweden	SE	24	SE45 5000 0000 0583 9825 7466
🇩🇰 Denmark	DK	18	DK50 0040 0440 1162 43
🇳🇴 Norway	NO	15	NO93 8601 1117 947
🇫🇮 Finland	FI	18	FI21 1234 5600 0007 85
🇬🇷 Greece	GR	27	GR16 0110 1250 0000 0001 2300 695
🇱🇺 Luxembourg	LU	20	LU28 0019 4006 4475 0000
🇸🇦 Saudi Arabia	SA	24	SA03 8000 0000 6080 1016 7519
🇹🇷 Turkey	TR	26	TR33 0006 1005 1978 6457 8413 26
🇦🇪 United Arab Emirates	AE	23	AE07 0331 2345 6789 0123 456
🇷🇴 Romania	RO	24	RO49 AAAA 1B31 0075 9384 0000

Troubleshooting

Common reasons an IBAN fails

If the checker reports an invalid IBAN, it's usually one of these.

A mistyped character

A single wrong or transposed digit changes the checksum. The MOD-97-10 test will flag it even when the length looks right.

Wrong length

Missing or extra characters — often from copying a partial number — make the IBAN too short or too long for its country.

Hidden or wrong characters

Pasting can pull in stray symbols, the letter O instead of zero, or the wrong country code entirely. Only A–Z and 0–9 are valid.

Good to know

IBAN vs SWIFT/BIC

They're often needed together for an international transfer, but they identify different things.

IBAN — the account

The International Bank Account Number points to one specific account, including its country, bank and account number. It's what funds are credited to.

SWIFT/BIC — the bank

The Bank Identifier Code identifies the financial institution. Cross-border payments use it to route to the right bank, then the IBAN to reach the account.

FAQ

IBAN checker — frequently asked questions

What an IBAN check does and doesn't tell you, how the check digits work, and how IBANs differ from SWIFT/BIC codes.

Moving money to IBANs?

See Global Accounts

What is an IBAN checker?

An IBAN checker validates that an International Bank Account Number is correctly formed. It checks the two-letter country code, the total length for that country, the allowed characters, and the ISO 7064 MOD-97-10 check digits. Our checker runs entirely in your browser, so your IBAN is never sent to a server.

Does a valid IBAN mean the account exists?

No. Validation confirms the IBAN is well-formed and the check digits are correct, which catches typos and transcription errors. It cannot confirm the account is open or belongs to a particular person — that is only verified when a payment is attempted.

Is my IBAN sent anywhere?

No. All validation happens locally in your browser using JavaScript. Nothing is transmitted, stored, or logged.

How are IBAN check digits calculated?

Move the first four characters (the country code and check digits) to the end, replace each letter with two digits (A=10 through Z=35), then take the whole number modulo 97. A valid IBAN always gives a remainder of 1.

How long is an IBAN?

IBAN length is fixed per country, from 15 characters (Norway) up to 32 (Saint Lucia). A German or UK IBAN is 22 characters and a French IBAN is 27. The checker compares your input against the official length for its country code.

What is the difference between an IBAN and a SWIFT/BIC code?

An IBAN identifies a specific bank account, while a SWIFT/BIC code identifies the bank itself. International transfers often need both — the IBAN to reach the account and the BIC to route to the institution.

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