What is hostname lookup?

Hostname lookup resolves a domain name to IP addresses using DNS A (IPv4) and AAAA (IPv6) records.

What is the difference between hostname and domain?

A domain is the registered name (example.com). A hostname is a specific name under it (www.example.com or mail.example.com).

Load balancing, CDN anycast, and IPv4/IPv6 dual-stack publishing return several A and AAAA answers.

TTL caching, propagation delay, or typos in the hostname can delay updated records.

This resolver focuses on A and AAAA addresses for the name you enter. Use DNS Lookup for full record types including CNAME.

DNS Tools

Find IPv4 and IPv6 addresses behind any domain name. Resolve DNS A and AAAA records instantly.