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DNS Checker(beta)

DNS Checker Bot IP Addresses

All IP addresses used by DNS Checker automated systems. This list can be used for allowlisting or firewall configuration.

WebCheck Crawler IPs

54.235.89.97crawler.dnschkr.com
178.156.178.213crawler-eu.dnschkr.com

Echo DNS Scanner IPs

DNS research queries (and periodic TCP service-presence scans on ports 80 and 443) from the Echo fleet originate from the following six IP addresses. Each has a matching forward and reverse DNS (PTR) record for verification.

37.27.58.50echo-1.scanner.dnschkr.com
46.4.73.107echo-2.scanner.dnschkr.com
46.4.68.157echo-3.scanner.dnschkr.com
65.109.111.103echo-4.scanner.dnschkr.com
65.109.62.140echo-5.scanner.dnschkr.com
135.181.61.236echo-6.scanner.dnschkr.com

Verification

To verify a request is from DNS Checker:

  1. Perform a reverse DNS (PTR) lookup on the source IP. It should resolve to a *.dnschkr.com hostname.
  2. Perform a forward DNS (A) lookup on the hostname. It should resolve back to the original IP.
  3. For web requests, confirm the User-Agent contains DNSChkr-WebCheck.

Machine-Readable Format

This list is also available as JSON and plain text.

Last updated April 27, 2026. For questions, visit the bot documentation page or contact [email protected].