{
  "port": 28201,
  "protocol": "tcp",
  "service": "Unassigned",
  "oneLiner": "The first number in an unassigned IANA block, unnamed in Nmap and unclaimed by any product.",
  "whatItIs": "IANA's unassigned range 28201-28239 begins at this port, so 28201 is registered to nobody. Nmap lists it as 'unknown' with a small open-frequency, enough to include it in the default 1000-port TCP scan. Nothing in the public record — vendor docs, RFCs, or malware reporting — associates it with a service. An open 28201 is a local decision someone made, and the banner is the only way to find out whose.",
  "exposure": {
    "verdict": "careful",
    "note": "Unknown by default. Identify the listener; an unexplained open port on a public IP deserves closing rather than documenting."
  },
  "checkCommand": "nmap -Pn -sV -p 28201 --reason TARGET",
  "links": [
    {
      "title": "IANA Service Name and Transport Protocol Port Number Registry",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml",
      "kind": "iana"
    },
    {
      "title": "Nmap nmap-services frequency table",
      "url": "https://github.com/nmap/nmap/blob/master/nmap-services",
      "kind": "github"
    }
  ]
}