---
title: c
description: Two-letter ISO 3166 country code.
component: pingds
version: 8.1
page_id: pingds:schemaref:at-c
canonical_url: https://docs.pingidentity.com/pingds/8.1/schemaref/at-c.html
---

# c

Two-letter ISO 3166 country code.

|                             |                                                                                                                |
| --------------------------- | -------------------------------------------------------------------------------------------------------------- |
| *OID*                       | 2.5.4.6                                                                                                        |
| *Names*                     | c, countryName                                                                                                 |
| *Superior type*             | [name](at-name.html)                                                                                           |
| *Syntax*                    | [CountryString](s-CountryString.html)                                                                          |
| *Equality matching rule*    | [caseIgnoreMatch](mr-caseIgnoreMatch.html)                                                                     |
| *Ordering matching rule*    | [caseIgnoreOrderingMatch](mr-caseIgnoreOrderingMatch.html)                                                     |
| *Substring matching rule*   | [caseIgnoreSubstringsMatch](mr-caseIgnoreSubstringsMatch.html)                                                 |
| *Single value*              | true                                                                                                           |
| *User modification allowed* | true                                                                                                           |
| *Usage*                     | userApplications                                                                                               |
| *Origin*                    | [RFC 4519](https://datatracker.ietf.org/doc/html/rfc4519)                                                      |
| *Schema file*               | 00-core.ldif                                                                                                   |
| *Used by*                   | [country](oc-country.html), [friendlyCountry](oc-friendlyCountry.html), [untypedObject](oc-untypedObject.html) |