{
  "port": 5440,
  "protocol": "tcp",
  "service": "Unassigned",
  "oneLiner": "Unassigned at IANA — no registered service, and nothing standard listens here.",
  "whatItIs": "The registry lists 5438-5442 as unassigned, so 5440 has no service name and no owner. Its neighbours are busy — 5432 is PostgreSQL, 5443 is registered to Pearson — but the port itself is claimed only by whatever application an operator points at it. Identify the process rather than reading anything into the number.",
  "exposure": {
    "verdict": "careful",
    "note": "No registration means no assumptions: an open 5440 is an application someone chose, and it should be reviewed on its own terms."
  },
  "checkCommand": "sudo lsof -nP -iTCP:5440 -sTCP:LISTEN",
  "links": [
    {
      "title": "IANA port registry — 5440 (unassigned)",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=5440",
      "kind": "iana"
    }
  ]
}