A simple DNS lookup tool
Domain 192.0.43.8
Type PTR
Server Quad9
Duration 32 ms
Results
JSON ZONE 
{
  "status": "NOERROR",
  "from": "9.9.9.9",
  "answer": [
    {
      "type": "PTR",
      "name": "43-8.any.icann.org",
      "ttl": 21600
    }
  ]
}
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