# iso6523Code - Schema.org Property

> Source: https://schema.org/iso6523Code
> Extracted: 2026-02-16T18:47:40.753Z

---

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A Schema.org Property

*This term is in the "new" area - implementation feedback and adoption from applications and websites can help improve our definitions.*

An organization identifier as defined in [ISO 6523(-1)](https://en.wikipedia.org/wiki/ISO/IEC_6523). The identifier should be in the `XXXX:YYYYYY:ZZZ` or `XXXX:YYYYYY`format. Where `XXXX` is a 4 digit *ICD* (International Code Designator), `YYYYYY` is an *OID* (Organization Identifier) with all formatting characters (dots, dashes, spaces) removed with a maximal length of 35 characters, and `ZZZ` is an optional OPI (Organization Part Identifier) with a maximum length of 35 characters. The various components (ICD, OID, OPI) are joined with a colon character (ASCII `0x3a`). Note that many existing organization identifiers defined as attributes like [leiCode](https://schema.org/leiCode) (`0199`), [duns](https://schema.org/duns) (`0060`) or [GLN](https://schema.org/globalLocationNumber) (`0088`) can be expressed using ISO-6523. If possible, ISO-6523 codes should be preferred to populating [vatID](https://schema.org/vatID) or [taxID](https://schema.org/taxID), as ISO identifiers are less ambiguous.

### Values expected to be one of these types

`-   [Text](https://schema.org/Text "Text")`

#### Source

[https://github.com/schemaorg/schemaorg/issues/2915](https://github.com/schemaorg/schemaorg/issues/2915)

  

### Examples

Example notes or example HTML without markup.

Google.Org

Contact Details:
Main address: 38 avenue de l'Opéra, F-75002 Paris, France
 Tel: ( 33 1) 42 68 53 00, Fax: ( 33 1) 42 68 53 01
E-mail: secretariat (at) google.org
URL: <a href="http://www.google.org">www.google.org</a>
SIRET Code: 443 061 841 00039
VAT Number: FR64443061841

Members:
- National Scientific Members in 100 countries and territories: Country1, Country2, ...
- Scientific Union Members, 30 organizations listed in this Yearbook: Member 1, Member 2

History:

Example encoded as [Microdata](https://en.wikipedia.org/wiki/Microdata_\(HTML\)) embedded in HTML.

<div itemscope itemtype="https://schema.org/Organization">
  <span itemprop="name">Google.org (GOOG)</span>

Contact Details:
  <div itemprop="address" itemscope itemtype="https://schema.org/PostalAddress">
    Main address:
      <span itemprop="streetAddress">38 avenue de l'Opéra</span>
      <span itemprop="postalCode">F-75002</span>
      <span itemprop="addressLocality">Paris, France</span>
    ,
  </div>
    Tel:<span itemprop="telephone">( 33 1) 42 68 53 00 </span>,
    Fax:<span itemprop="faxNumber">( 33 1) 42 68 53 01 </span>,
    E-mail: <span itemprop="email">secretariat@example.com</span>
    SIRET Code: 443 061 841 00039<meta itemprop="iso6523Code" content="0009:44306184100039" />
    VAT Number: FR64443061841<meta itemprop="iso6523Code" content="9957:FR64443061841" />

Members:
- National Scientific Members in 100 countries and territories: Country1, Country2, ...
- Scientific Union Members, 30 organizations listed in this Yearbook:
List of Alumni:
 <span itemprop="alumni" itemscope itemtype="https://schema.org/Person">
   <span itemprop="name">Jack Dan</span>
 </span>,
 <span itemprop="alumni" itemscope itemtype="https://schema.org/Person">
   <span itemprop="name">John Smith</span>
 </span>,

History:
</div>

Example encoded as [RDFa](https://en.wikipedia.org/wiki/RDFa) embedded in HTML.

<div vocab="https://schema.org/" typeof="Organization">
  <span property="name">Google.org (GOOG)</span>

Contact Details:
  <div property="address" typeof="PostalAddress">
    Main address:
      <span property="streetAddress">38 avenue de l'Opera</span>
      <span property="postalCode">F-75002</span>
      <span property="addressLocality">Paris, France</span>
    ,
  </div>
    Tel:<span property="telephone">( 33 1) 42 68 53 00 </span>,
    Fax:<span property="faxNumber">( 33 1) 42 68 53 01 </span>,
    E-mail: <span property="email">secretariat@example.com</span>
    SIRET Code: 443 061 841 00039<meta itemprop="iso6523Code" content="0009:44306184100039" />
    VAT Number: FR64443061841<meta itemprop="iso6523Code" content="9957:FR64443061841" />

Members:
- National Scientific Members in 100 countries and territories: Country1, Country2, ...
- Scientific Union Members, 30 organizations listed in this Yearbook:
List of Alumni:
 <span property="alumni"  typeof="Person">
   <span property="name">Jack Dan</span>
 </span>,
 <span property="alumni"  typeof="Person">
   <span property="name">John Smith</span>
 </span>
History:
</div>

Example encoded as [JSON-LD](https://en.wikipedia.org/wiki/JSON-LD) in a HTML script tag.

<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "Organization",
  "address": {
    "@type": "PostalAddress",
    "addressLocality": "Paris, France",
    "postalCode": "F-75002",
    "streetAddress": "38 avenue de l'Opéra"
  },
  "email": "secretariat@example.com",
  "faxNumber": "+33142685301",
  "iso6523Code": "0009:44306184100039",
  "iso6523Code": "9957:FR64443061841",
  "member": \[
    {
      "@type": "Organization"
    },
    {
      "@type": "Organization"
    }
  \],
  "alumni": \[
    {
      "@type": "Person",
      "name": "Jack Dan"
    },
    {
      "@type": "Person",
      "name": "John Smith"
    }
  \],
  "name": "Google.org (GOOG)",
  "telephone": "+33 1 42 68 53 00"
}
</script>

Structured representation of the JSON-LD example.