This read-only field gives the case-preserved display form of the domain name for this cached resource record, matching the plain cache-name field's value but respecting original letter casing per DNS convention. An administrator reads it when the exact casing of a cached hostname matters for display or comparison purposes rather than the case-insensitive lookup value. For example, verifying a mixed-case hostname was cached exactly as advertised by the authoritative server would mean checking this OID's value against the expected casing.