DNS Inspector
Look up any DNS record type — A, AAAA, MX, NS, CNAME, TXT, SRV, CAA — from your choice of resolver, check how a recent change is propagating across global nameservers in real time, or audit an entire domain's configuration for inconsistencies. Results come directly from live resolvers, so you see exactly what the internet sees — not what a cache thinks. For continuous DNS monitoring with change alerts, see DNS Monitoring →
Featured
DNS & Name Resolution
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DNS Query Tool
Full Domain Name System (DNS) query with answer, authority, and additional sections.
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Domain Name Lookup
Simple forward and reverse Domain Name System (DNS) lookups.
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Quick DNS Lookup
Concise single-line Domain Name System (DNS) lookups.
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DNSSEC Query Tool
Domain Name System (DNS) lookups with Domain Name System Security Extensions (DNSSEC) validation status.
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Whois
Look up domain registration, Internet Protocol (IP) allocation, or Autonomous System Number (ASN) ownership.
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DNSSEC Validator
Validate a domain's Domain Name System Security Extensions (DNSSEC) chain via a validating resolver; show Delegation Signer (DS) / DNS Public Key (DNSKEY) / Resource Record Signature (RRSIG) at every zone cut.
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Reverse IP
Find other domains hosted on the same Internet Protocol (IP) address via a passive Domain Name System (DNS) provider (Hackertarget free tier).
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DNS Resolver
Look up Domain Name System (DNS) records for any hostname against a choice of public resolvers. Switch record type with the tabs.
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IPv4 Address Lookup
IPv4 address (A record) lookup.
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MX Lookup
Mail exchanger (MX) record lookup.
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All DNS Records
Query A, AAAA, MX, NS, TXT, CAA, SOA in parallel.
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DMARC Record Checker
Look up and parse a domain's Domain-based Message Authentication, Reporting & Conformance (DMARC) Text (TXT) record at _dmarc.<domain>.
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DKIM Record Checker
Look up a domain's DomainKeys Identified Mail (DKIM) Text (TXT) record(s) at <selector>._domainkey.<domain>.
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TLS-RPT Checker
Look up and parse a domain's SMTP TLS Reporting (TLS-RPT) record at _smtp._tls.<domain>.
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BIMI Record Checker
Look up a domain's Brand Indicators for Message Identification (BIMI) record at <selector>._bimi.<domain> and validate its Scalable Vector Graphics (SVG) logo and Verified Mark Certificate (VMC).
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MTA-STS Policy Checker
Look up the _mta-sts Text (TXT) record and the HyperText Transfer Protocol Secure (HTTPS) policy file, then cross-check the policy's mx patterns against the domain's real Mail Exchange (MX) hosts.
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DNS Check
Audit a domain's delegation: parent/child Name Server (NS) agreement, glue, per-nameserver reachability and authority, Start of Authority (SOA) serial convergence, and open recursion.
CDN & DNS Propagation
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DNS Propagation / CDN Check
Query a hostname against 34 public resolvers across multiple countries in parallel; reveals geo-Domain Name System (DNS), anycast, and split-horizon behavior.
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DNS Load Tester login
Sustained-load DNS performance benchmarking tool.
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DNS Capacity Tester login
Ramps DNS query rate until a resolver loses packets.
Monitor this automatically
NetTests can run these checks on a schedule, preserve historical results, compare changes over time, and alert you the moment something breaks.
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