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 Resolver

Unified DNS lookup across record types and resolvers — modeled on a live resolver with instant results.
DNS Propagation

Check how a DNS change has propagated across global resolvers in real time.

DNS & Name Resolution

DNS Query Tool

Full DNS query with answer, authority, and additional sections.
Domain Name Lookup

Simple forward and reverse DNS lookups.
Quick DNS Lookup

Concise single-line DNS lookups.
DNSSEC Query Tool

DNS lookups with DNSSEC validation status.
Whois

Look up domain registration, IP allocation, or ASN ownership.
DNSSEC Validator

Validate a domain's DNSSEC chain via a validating resolver; show DS / DNSKEY / RRSIG at every zone cut.
Reverse IP

Find other domains hosted on the same IP via a passive-DNS provider (Hackertarget free tier).
DNS Resolver

Look up DNS records for any hostname against a choice of public resolvers. Switch record type with the tabs.
IPv4 Address Lookup

IPv4 address (A record) lookup.
MX Lookup

Mail exchanger (MX) record lookup.
All DNS Records

Query A, AAAA, MX, NS, TXT, CAA, SOA in parallel.
DMARC Record Checker

Look up and parse a domain's DMARC TXT record at _dmarc.<domain>.
DKIM Record Checker

Look up a domain's DKIM TXT record(s) at <selector>._domainkey.<domain>.
TLS-RPT Checker

Look up and parse a domain's SMTP TLS Reporting (TLS-RPT) record at _smtp._tls.<domain>.
BIMI Record Checker

Look up a domain's BIMI record at <selector>._bimi.<domain> and validate its logo (SVG) and VMC certificate.
MTA-STS Policy Checker

Look up the _mta-sts TXT record and the HTTPS policy file, then cross-check the policy's mx patterns against the domain's real MX hosts.
DNS Check

Audit a domain's delegation: parent/child NS agreement, glue, per-nameserver reachability and authority, SOA serial convergence, and open recursion.

CDN & DNS Propagation

DNS Propagation / CDN Check

Query a hostname against 34 public resolvers across multiple countries in parallel; reveals geo-DNS, anycast, and split-horizon behavior.
DNS Load Tester login

Sustained-load DNS performance benchmarking tool.
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.

Start monitoring free → See all monitoring products