Free DNS Lookup Tool

Explore DNS record types, build zone file configurations, and learn how DNS works with interactive examples. Enter any domain to see simulated records and generate DNS configurations.

Educational DNS Tool. This tool generates example DNS records for any domain you enter. It shows you what real DNS records look like and how they are structured. For actual DNS queries, use dig or nslookup in your terminal.
Simulate DNS Lookup
DNS Record Builder
NameTypeValueTTL
🌐
Basic Website
A + CNAME + MX
✉
Google Workspace
MX + TXT (SPF/DKIM)
✉
Microsoft 365
MX + CNAME + TXT
▲
Vercel Deploy
A + CNAME records
🚀
Netlify Deploy
A + CNAME records
☁
Cloudflare
NS + A + AAAA
🔒
Email Auth (SPF+DKIM+DMARC)
TXT records
🔗
Subdomain Setup
A + CNAME for subs
DNS Fundamentals

How DNS Resolution Works

User types example.com | v [Browser Cache] -- cached? --> return IP | (miss) v [OS Resolver (/etc/hosts)] -- found? --> return IP | (miss) v [Recursive Resolver (ISP/8.8.8.8)] -- cached? --> return IP | (miss) v [Root Server (.)] --> "Ask .com TLD server" | v [TLD Server (.com)] --> "Ask ns1.example.com" | v [Authoritative NS (ns1.example.com)] --> "93.184.216.34" | v Response cached at each level (TTL) Browser connects to 93.184.216.34

TTL (Time to Live) Values

300 (5 min) — Dynamic IPs, failover
3600 (1 hour) — Standard default
14400 (4 hours) — Stable records
86400 (24 hours) — Rarely changed

Useful CLI Commands

# Query all records dig example.com ANY # Query specific record type dig example.com A dig example.com MX dig example.com TXT dig example.com NS # Use specific DNS server dig @8.8.8.8 example.com A # Short output dig +short example.com A # Trace the resolution path dig +trace example.com # Reverse DNS lookup dig -x 93.184.216.34 # nslookup alternative nslookup example.com nslookup -type=MX example.com

Common DNS Providers

Cloudflare
1.1.1.1 / 1.0.0.1
Google
8.8.8.8 / 8.8.4.4
Quad9
9.9.9.9 / 149.112.112.112
OpenDNS
208.67.222.222 / 208.67.220.220

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Open source

NexTool on GitHub

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