A simple DNS lookup tool
Domain 142.251.163.139.in-addr.arpa
Type A
Server Quad9
Duration 90 ms

The DNS response failed DNSSEC validation. This is often caused by expired signatures, misconfigured DNS zones, or key management issues. In rare cases, it could indicate a security issue such as DNS spoofing.

Results
JSON ZONE 
{
  "status": "SERVFAIL",
  "from": "9.9.9.9"
}
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