About domains and DNS
What is DNS?
How DNS associates domain names with IP addresses and other information.
Updated: October 9, 2026
The Domain Name System is a hierarchical, distributed database that associates domain names with IP addresses, mail destinations, and other data. Root, TLD, and authoritative servers divide responsibility.
In NetKarte
Enter the name in DNS Lookup, choose A or AAAA for web destinations or MX for mail delivery, complete verification, and search.
DNS Lookup queries A, AAAA, MX, and other record types for the name supplied. Results are grouped by record type and include the TTL returned by the resolver.
Limitations
Results can change as caches expire and updates propagate. The presence of a DNS record does not establish that its destination is safe.
Why correct names can produce different results
Read DNS as a combination of name, type, and resolver. A and MX for example.com serve different purposes; www.example.com is another name. Corporate and public resolvers may also answer differently.
NetKarte queries Cloudflare from its server. It does not identify your device's current DNS or compare every resolver worldwide.
When a change is not visible
Select the exact changed name and type, then check the responsible DNS configuration. TTL helps explain caching, not a worldwide update deadline. Distinguish name absent, type absent, and lookup failure rather than relying on repeated searches.