Regex for IBAN Number

Validates International Bank Account Numbers (IBAN): 2-letter country code, 2 check digits, and up to 30 alphanumeric characters.

Pattern

/^[A-Z]{2}\d{2}[A-Z0-9]{4,30}$/

Live Tester

Enter a string to test

Examples

✓ DE89370400440532013000

✓ GB29NWBK60161331926819

✓ FR7630006000011234567890189

✗ DE89

✗ de89370400440532013000

✗ 1234567890

Pattern Breakdown

^[A-Z]{2} — two uppercase letters (country code)

\d{2} — two check digits

[A-Z0-9]{4,30}$ — 4 to 30 alphanumeric characters (BBAN)

Code Snippets

Javascript

const regex = /^[A-Z]{2}\d{2}[A-Z0-9]{4,30}$/;
regex.test("DE89370400440532013000"); // true

Python

import re
pattern = r"^[A-Z]{2}\d{2}[A-Z0-9]{4,30}$"
bool(re.match(pattern, "DE89370400440532013000"))  # True

Php

$pattern = '/^[A-Z]{2}\d{2}[A-Z0-9]{4,30}$/';
preg_match($pattern, "DE89370400440532013000"); // 1

Related Patterns

Email Address /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/ URL /^https?:\/\/(www\.)?[a-zA-Z0-9@:%._+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([a-zA-Z0-9()@:%_+.~#?&/=-]*)$/ Phone Number (International) /^\+?[1-9]\d{1,14}$/ Phone Number (US) /^$?[2-9]\d{2}$?[-.\s]?\d{3}[-.\s]?\d{4}$/ Phone Number (EU) /^\+?[1-9][0-9]{0,3}[\s.-]?$?[0-9]{1,5}$?[\s.-]?[0-9]{1,5}[\s.-]?[0-9]{1,5}$/ IPv4 Address /^((25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(25[0-5]|2[0-4]\d|[01]?\d\d?)$/

Frequently Asked Questions

What is the regex for IBAN Number?▾

The regex pattern for IBAN Number is /^[A-Z]{2}\d{2}[A-Z0-9]{4,30}$/. Validates International Bank Account Numbers (IBAN): 2-letter country code, 2 check digits, and up to 30 alphanumeric characters.

How do I use the IBAN Number regex in JavaScript?▾

In JavaScript you create the pattern with a regex literal or the RegExp constructor and call .test() to check a string against it. A ready-to-copy example is shown in the Code Snippets section above, alongside Python and PHP versions.

What does the IBAN Number pattern match?▾

It matches strings like DE89370400440532013000; it rejects strings like DE89. See the Examples section above for the full list of matching and non-matching cases.