# Check if a value is a business identifier code

Test the shape of an 8- or 11-character BIC (SWIFT) code.

Canonical: https://1loc.dev/validator/check-if-a-value-is-a-business-identifier-code/
Version: 1.0.0
Runtime: JavaScript · Node.js 22 / modern browsers
Verification: Local fixtures; no external services
Updated: 2026-10-28

## Implementation

```javascript
function isBic(value) { return /^[a-zA-Z]{6}[a-zA-Z0-9]{2}([a-zA-Z0-9]{3})?$/.test(value); }
```

## Input

```json
"DEUTDEFF"
```

## Expected output

```json
true
```

## Edge case

Input:
```json
"DEUT1EFF"
```
Output:
```json
false
```

## Limits

- This checks the ISO 9362 format only — not that the institution or country code exists.

The lab validates types and size before calling this function. Add equivalent validation at your own trust boundary.

## Source and license

Original: https://github.com/phuocng/1loc/blob/14b481cf60dff1620ab1bb99a43b1f68068cdd9b/contents/check-if-a-value-is-a-business-identifier-code.mdx
Author: Nguyen Huu Phuoc and original contributors
Contributors: See original repository history
Source commit: 14b481cf60dff1620ab1bb99a43b1f68068cdd9b
Copyright (c) 2020 phuoc-ng
License: MIT — https://1loc.dev/licenses/
Maintainer: Oveyon
Modifications: Curated implementation; explicit input contract, edge case and limits. Original MDX retained as inert source evidence.