---
title: serialNumber
description: Serial numbers of a device.
component: pingds
version: 8.1
page_id: pingds:schemaref:at-serialNumber
canonical_url: https://docs.pingidentity.com/pingds/8.1/schemaref/at-serialNumber.html
---

# serialNumber

Serial numbers of a device.

|                             |                                                                |
| --------------------------- | -------------------------------------------------------------- |
| *OID*                       | 2.5.4.5                                                        |
| *Names*                     | serialNumber                                                   |
| *Syntax*                    | [PrintableString](s-PrintableString.html)                      |
| *Equality matching rule*    | [caseIgnoreMatch](mr-caseIgnoreMatch.html)                     |
| *Ordering matching rule*    | [caseIgnoreOrderingMatch](mr-caseIgnoreOrderingMatch.html)     |
| *Substring matching rule*   | [caseIgnoreSubstringsMatch](mr-caseIgnoreSubstringsMatch.html) |
| *Single value*              | false: multiple values allowed                                 |
| *User modification allowed* | true                                                           |
| *Usage*                     | userApplications                                               |
| *Origin*                    | [RFC 4519](https://datatracker.ietf.org/doc/html/rfc4519)      |
| *Schema file*               | 00-core.ldif                                                   |
| *Used by*                   | [device](oc-device.html)                                       |