Free DNS Lookup Online — Check A, AAAA, MX, NS, TXT Records
DNS Lookup
Free DNS lookup
Check A, AAAA, MX, NS, TXT, CNAME, SOA, and CAA records for any public domain. Built for CCNA labs, Cisco networking practice, and everyday IT administration.
Free Online DNS Lookup for Network Engineers and CCNA Students
Use this free DNS lookup to check live public records for any domain. This online DNS lookup is a simple DNS lookup tool for CCNA students, network engineers, and IT administration workflows — including home networks and Cisco lab practice.
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How to run a DNS lookup the right way
Enter the bare domain or hostname, then run the query. Start with A and AAAA when you troubleshoot websites, then check NS and SOA when a change has not appeared yet. For mail problems, open the MX Record Lookup. I use this flow weekly when clients say the site is down but the server is fine — DNS was pointing somewhere else.
Field notes from real DNS tickets
After years of website launches and Hostinger/Cloudflare migrations, the first question I ask is still the same: what do public resolvers see right now? A screenshot of this DNS lookup online free tool ends arguments faster than guesswork. Pair it with your CIDR and subnet tools when you document home labs or Cisco packet tracer networks.