The Problem
Every time I need to check DNS records for a domain — whether debugging email delivery, verifying nameserver propagation, or checking SPF/DMARC — I end up on some ad-infested site with captchas.
So I built my own.
DNS Lookup Tool
Paste any domain and instantly see:
- A / AAAA records (IPv4 + IPv6)
- MX records (mail servers, sorted by priority)
- NS records (nameservers)
- TXT records (SPF, DKIM, verification tokens)
- SOA record (zone authority)
- CNAME records
- CAA records (certificate authority authorization)
- Reverse DNS for all A records
- Email Security check — SPF and DMARC validation at a glance
Why This Can't Be Replaced by ChatGPT
This tool makes real DNS queries in real-time. ChatGPT can explain what DNS records are, but it can't actually resolve them for a live domain. You need actual network requests for that.
Tech Stack
- Next.js 16 (App Router)
- Node.js
dns/promisesmodule for all lookups - Tailwind CSS for the dark-mode UI
- Deployed on Vercel (edge-fast responses)
Free Forever
No signup. No rate limits. No ads (yet). Just paste a domain and get your records.
Try it: dns-lookup-cyan.vercel.app
Part of my series building free developer tools. Previously: AI Review Responder, PingCraft Uptime Monitor, SiteSafe Security Scanner.
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