Free tool
DNS & lookupDNS Lookup
Query live DNS records for any public domain. Verify A and AAAA addresses, mail exchangers, nameservers, and more before you change production DNS.
Looks up public internet data for the target you enter. We do not store results.
Free toolWhen a website fails to load or email stops flowing, experienced admins open a DNS lookup before they touch the firewall. This free DNS lookup tool queries public name servers for A, AAAA, MX, TXT, NS, CNAME, SOA, and CAA records so CCNA students, helpdesk staff, and network engineers can see what the internet actually publishes for a domain. Pair it with your subnetting practice: once you know the A record IP, you can map it into CIDR blocks and home-lab VLANs with confidence.
How to use the DNS Lookup
- 1
Enter a public domain such as example.com (no http:// prefix required).
- 2
Choose a record type: start with A for IPv4, AAAA for IPv6, or MX for mail routing.
- 3
Tap Lookup DNS and read the answers. Use example chips to compare well-known domains.
Why DNS lookup skills still matter
DNS sits under almost every IT ticket: wrong A records break websites, missing MX records break mail, and stale CNAMEs send users to the wrong CDN. Cisco networking labs and CCNA exams expect you to read dig-style output and explain what each record does. Checking live records here builds the same habit you need on a home network, in network administration change windows, and when you validate IPv4 examples after a subnetting exercise.
DNS lookup example
Look up example.com with type A. You should see the published IPv4 address (or addresses) for that domain. Switch to MX to confirm whether the domain accepts mail, then open our MX Record Lookup for priority detail. That workflow mirrors what network engineers do before a cutover.
Guides and next steps
Privacy note
We query public DNS for the domain you submit and return the answers. We do not store lookup history.
Frequently asked questions
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