Pricing

$10.00 / 1,000 ip checkeds

Reverse DNS Lookup — PTR Records + FCrDNS Verification

Input: a list of IP addresses. Output: one JSON record per IP with the PTR hostname from reverse DNS and a forward-confirmed reverse DNS (FCrDNS) result verifying the hostname maps back to the IP. Cheap pay-per-result pricing: $0.01 per IP checked.

Pricing

$10.00 / 1,000 ip checkeds

Rating

0.0

(0)

Developer

Anthony Snider

Actor stats

Bookmarked

Total users

Monthly active users

4 days ago

Last modified

Reverse DNS (PTR) Lookup

Turn IP addresses into hostnames — and verify them.

Live on the Apify Store — run it instantly or call it as an agent tool via Apify MCP.

Resolve any IPv4 or IPv6 address to its hostname(s) via reverse DNS (PTR), then forward-confirm (FCrDNS) that each hostname actually maps back to the original IP. FCrDNS is the same check mail servers use to score sender reputation, so this is ideal for anti-spam, log enrichment, and threat-intel pipelines.

What you get

PTR hostnames for each IP (the dns.reverse() result).
FCrDNS verdict — true only when a returned hostname forward-resolves back to the original IP.
Confirmed hostnames — the subset that passed forward confirmation.
IP validation — invalid addresses are flagged, never crash the run.
Single or bulk — pass one ip or an array of ips.

Input

{
  "ips": ["8.8.8.8", "1.1.1.1"],
  "maxIps": 50
}

Or a single address:

{ "ip": "8.8.8.8" }

Output

One dataset item per IP:

{
  "ip": "8.8.8.8",
  "valid": true,
  "version": 4,
  "hostnames": ["dns.google"],
  "fcrdns": true,
  "confirmedHostnames": ["dns.google"]
}

Pricing

Pay-per-event: $0.01 per IP checked (ip-checked).

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