sinikoding

Reverse DNS (PTR)

net

The PTR name an IP claims, and whether that name resolves back to it.

Through the API
curl -X POST https://sinikoding.dev/api/v1/reverse-dns \
  -H 'content-type: application/json' \
  -H 'x-api-key: tk_live_…' \
  -d '{"ip":"…"}'

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This tool makes an outbound network call. It stays free on this page.