---
title: "Siren – API-Referenz · Quittio"
description: "SIREN (nine digits) and SIRET (fourteen digits) of the French business register, both with a Luhn check digit; SIRET numbers of La Poste (SIREN 356000000) use a sum of digits instead."
canonical_url: "https://quittio.dev/docs/api/Quittio/Country/FR/Support/Siren"
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---

> Index of every page on this site: [llms.txt](https://quittio.dev/llms.txt)

[API reference](https://quittio.dev/docs/api) / [Quittio](https://quittio.dev/docs/api/Quittio) \\ [Country](https://quittio.dev/docs/api/Quittio/Country) \\ [FR](https://quittio.dev/docs/api/Quittio/Country/FR) \\ [Support](https://quittio.dev/docs/api/Quittio/Country/FR/Support)

# Siren

final class in quittio/country-fr

`Quittio\Country\FR\Support\Siren` · [Source](https://github.com/Quittio/quittio/blob/v0.7.1/packages/country-fr/src/Support/Siren.php#L11)

SIREN (nine digits) and SIRET (fourteen digits) of the French business register, both with a Luhn check digit; SIRET numbers of La Poste (SIREN 356000000) use a sum of digits instead.

## Methods \#

| Method | Description |
| --- | --- |
| `::isSiren()` | |
| `::isSiret()` | |
| `::of()` | The SIREN of a SIREN, a SIRET or a French VAT number ("FR40303265045"), or null. |

### `isSiren()`#

```
public static function isSiren(string $value): bool
```

static

| Parameter | Type | Description |
| --- | --- | --- |
| `$value` | `string` | |

<dl><dt>Returns</dt>
<dd><code>bool</code></dd>
</dl>

### `isSiret()`#

```
public static function isSiret(string $value): bool
```

static

| Parameter | Type | Description |
| --- | --- | --- |
| `$value` | `string` | |

<dl><dt>Returns</dt>
<dd><code>bool</code></dd>
</dl>

### `of()`#

```
public static function of(?string $value): ?string
```

static

The SIREN of a SIREN, a SIRET or a French VAT number ("FR40303265045"), or null.

| Parameter | Type | Description |
| --- | --- | --- |
| `$value` | `?string` | |

<dl><dt>Returns</dt>
<dd><code>?string</code></dd>
</dl>

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