Technology intelligence from a DNS lookup
Enter a company domain and DNSai returns what it runs: the email gateway behind its MX records, the vendors it publishes through SPF, TXT, DMARC and NS, the DKIM services that sign its mail, and the platform its website answers with. Underneath all of it is a full DNS lookup covering A, AAAA, MX, NS, TXT, SOA and the authentication records, each one labeled in plain English.
Run it on your own domain to document a configuration before you touch production, or on a customer, partner or competitor to see who they buy from. WHOIS, blacklist checks, DKIM and DMARC lookups, email header analysis, and address verification sit alongside. Every tool here is also reachable through the API and the MCP connectors, so Claude can run the same lookups you do.
Look up DNS records
Check email authentication and delivery
Investigate ownership and reputation
Comprehensive DNS Lookup
Query any domain for A, AAAA, CNAME, NS, SOA, TXT & MX records across Google, Cloudflare or NextDNS resolvers, with every record labeled in plain English.
Advanced DNS Lookup
Check MX routing, count SPF lookups against the limit of 10, discover DKIM selectors, and confirm the mail servers actually answer.
SPF / DKIM / DMARC Check
Find syntax errors, alignment gaps, and policies that stop short of enforcement, on your own domain or on anyone else's.
DNS Record Export & Backup
Export the full record set for documentation, audits and disaster recovery, or to join against a list you already keep.
Advanced DNS Analysis
One report on one domain: records, mail routing, authentication posture, the vendors it publishes, and the platform its website runs on.
Bulk Scan for Security & Business Intelligence
See which vendors a company runs by reading what its DNS already publishes: 1,131 vendors matched from 1,563 published patterns. Useful for account research, partner due diligence and competitive work, a list at a time.
Intelligent DNS Lookup
One search pulls A, AAAA, CNAME, TXT, SOA, SRV, MX, and the email authentication records, then groups them so the picture reads at a glance: who runs the mail, who signs it, and what the policy does when a message fails. Copy a shareable link, hand it to a colleague, or export the result for an audit. One domain per lookup here; for a list, use Bulk Lookup, DNS Explorer or the API.
From one domain to a whole market
Every finding comes from records a company publishes itself or from a live fetch of its own website. Nothing installed, nothing asked of the company.
A published record proves a relationship, not seat count or spend.
How the intelligence is built
DNSai reads DNS the way a person would. The raw output of A, MX, TXT, SPF, DKIM, and DMARC lookups gets labeled in plain English: who hosts the mail, which security vendor sits in front of it, who signs the DKIM, and what the DMARC policy does when a message fails. The website is fetched too, so the platform behind the page is named alongside the records. Every check here, and a dozen more, is part of our collection of free DNS tools, and the AI domain search shows the DNS behind any .ai name.
SPF, DKIM, and DMARC decide whether your mail reaches the inbox or is treated as fraud: SPF lists the servers allowed to send for your domain, DKIM signs each message, and DMARC tells the receiver what to do when one of those fails. Those same three records are also the clearest public statement a company makes about the vendors it sends mail through.
Whether you are checking one domain before a launch, onboarding a customer, or sitting on a portfolio of thousands across acquired brands, DNSai gives you one place to look, then exports the result or serves it through the API and the MCP connectors.
