{
"phone_number_id": "pn_123",
"client_id": "org_001",
"phone_number": "+15551234567",
"provider": "twilio",
"status": "assigned",
"assigned_agent_id": "agent_abc",
"supports_inbound": true,
"supports_outbound": true,
"created_at": "2024-01-01T00:00:00Z"
}