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4.1. Private Use

4.1. Private Use​

Private Use is for private or local use only, with the type and purpose defined by the local site. No attempt is made to prevent multiple sites from using the same value in different (and incompatible) ways. IANA does not record assignments from registries or ranges with this policy (and therefore there is no need for IANA to review them) and assignments are not generally useful for broad interoperability. It is the responsibility of the sites making use of the Private Use range to ensure that no conflicts occur (within the intended scope of use).

Examples:

  • Site-specific options in DHCP [RFC2939]
  • Fibre Channel Port Type Registry [RFC4044]
  • TLS ClientCertificateType Identifiers 224-255 [RFC5246]
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