Free DNS Lookup Tool
Look up A, AAAA, MX, NS, TXT, and CNAME records for any domain. Browser-based, powered by Cloudflare 1.1.1.1 — a free DNSChecker.org alternative with no signup, no query limits, no tracking.
What each record type tells you
The six DNS record types this tool checks — and what they reveal about a domain.
Maps a domain to an IPv4 address (e.g., 93.184.216.34).
Maps a domain to an IPv6 address (e.g., 2606:2800:220:1::).
Lists mail servers and their priority. Without MX, you can't receive email.
Identifies the authoritative nameservers for a domain.
Free-form text — used for SPF, DKIM, DMARC, and verification tokens.
Creates an alias from one domain to another (e.g., www → root).
DNS changes happen silently. FortWatch makes them loud.
Continuous monitoring of every DNS record on every domain you own — with alerts the moment anything moves. Catch silent NS swaps, dangling CNAMEs, and hijacked subdomains before they hurt you.
- Continuous monitoring of every DNS record type
- Automatic subdomain takeover detection
- Drift alerts within minutes of any registrar change
14-day trial · No card · Cancel anytime
Common questions about free DNS lookups
Is this DNS lookup tool really free?
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Yes — fully free with no signup, no rate limits, no daily query caps. Every lookup runs in your browser via Cloudflare's public 1.1.1.1 DNS-over-HTTPS API. We don't see what you queried and we don't log anything. Look up 1,000 domains a day if you want.
How is this different from DNSChecker.org or MxToolbox?
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Same data — we query the public DNS — same accuracy. The difference: this tool runs entirely in your browser (no server intermediary, no third-party tracking), there's no signup wall, no daily query limit, and no upsell prompts between lookups. If DNSChecker.org or MxToolbox keep nagging you to register, this is a permanent free alternative.
What is a DNS lookup?
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A DNS lookup queries the Domain Name System to find records associated with a domain — like its IP address (A/AAAA), mail servers (MX), text records (TXT), or nameservers (NS). It's the same process your browser does every time you visit a site.
What's the difference between A, AAAA, MX, NS, TXT, and CNAME records?
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A records map a domain to an IPv4 address, AAAA to an IPv6 address. MX records list mail servers for the domain. NS records identify the authoritative nameservers. TXT records hold arbitrary text — typically SPF, DKIM, DMARC, and verification tokens (Google, GitHub, etc). CNAME records create aliases pointing one domain at another.
How do I do a free nslookup online?
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Enter any domain in the box above and click Lookup DNS. The tool runs the equivalent of nslookup, dig, or host commands directly in your browser, querying Cloudflare's 1.1.1.1 resolver. Results show every record type at once — no need to run separate queries.
Why does my domain have no records?
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If lookups return empty: (1) the domain might not be registered, (2) DNS may not have propagated yet (new records can take 24-48h), (3) you might be looking up a subdomain that doesn't exist, or (4) the domain might have a CNAME pointing elsewhere.
What is TTL?
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TTL (Time To Live) is how long, in seconds, resolvers should cache the record before re-querying. Low TTLs (60-300s) mean faster propagation when you change records but more DNS traffic. High TTLs (3600s+) reduce traffic but slow down changes.
Can I monitor DNS changes automatically?
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DNS records change without warning when teams add new email providers, swap CDN, or rotate certificates. FortWatch monitors every DNS record on your domains continuously and alerts you the moment anything changes — including silent NS or MX swaps that often indicate a hijacked domain.