N5g-eir Equipment Identity Check
N5g-eir is a Service-based interface exhibited by 5G-EIR (5G-Equipment Identity Register) which is an optional network function that supports the checking of the status of Equipment's identity. For example, to check that it has not been blacklisted.
Reference: 3GPP TS 29.511 V15.3.0
N5g-eir_EquipmentIdentityCheck: This service offered by the 5G-EIR allows the consumer to check the Permanent Equipment Identifier (PEI) and check whether the PEI is in the black list or not.