dns-resolvers
GoodBotCommunity-sourcedA generic identifier used by various recursive DNS resolvers and network infrastructure tools when performing health checks or connectivity verification. Operated by Various.
What is dns-resolvers?
The 'dns-resolvers' identifier is a common signature used by network infrastructure, recursive DNS servers, and diagnostic tools to perform connectivity checks. It is not a single entity but rather a label adopted by various network operators and service providers to identify traffic originating from their DNS resolution layers. These requests are essential for ensuring that domain names are correctly mapped to IP addresses across the global internet infrastructure.
Identification
Why it crawls your site
This bot crawls or probes endpoints to validate that a domain is reachable and that its DNS records are correctly propagated. By performing these lookups, network operators can detect outages, latency issues, or misconfigurations in their resolution paths. Verification is typically handled by checking the source IP against known public DNS resolver ranges or by analyzing the request headers for standard diagnostic patterns.
IP ranges
Requests from dns-resolvers originate from these published ranges. For strict verification, match the source IP against this list in addition to checking the user-agent and reverse-DNS.
Block or allow dns-resolvers
Add a Disallow rule for dns-resolvers in your robots.txt file. You can also block at the server level using your web server configuration or CDN firewall rules to filter requests matching the user-agent string.
# Block dns-resolvers from crawling your entire site User-agent: dns-resolvers Disallow: / # Allow dns-resolvers full access User-agent: dns-resolvers Allow: /
Ensure your robots.txt allows dns-resolvers. Verify requests by checking the user-agent string.
Traffic & trends
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Data sources
This profile is compiled from the following sources.