is_known_invalid_number_sip_code (carrier_failure_service)

Checks whether a SIP response code is one of the known invalid number codes (404, 410, 484, 604) for carrier failure handling.

def is_known_invalid_number_sip_code(sip_response_code: Optional[int]) -> bool:
    return sip_response_code in {404, 410, 484, 604}