About the Hostname to IP
A forward lookup is the ordinary direction of DNS: hostname in, addresses out. System administrators reach for it when a config file names hosts that must be checked against a firewall rule, when a monitoring alert quotes a hostname, or when a certificate lists names that should all point at the same box. Paste the hostnames one per line and the page resolves each with a separate query, listing the A and AAAA records and any CNAME that sits in between.
The answers come from Cloudflare's public resolver, so they reflect the public DNS view, not an internal zone. Names that only exist inside a company network, or in a hosts file, will come back as NXDOMAIN here; that in itself is a useful check when something resolves on one machine and not another.
Only the hostnames are sent to our edge function, which forwards the query; nothing is stored. The Website to IP page is the same lookup phrased for site addresses, and IP to hostname runs the reverse.
How to use
- Enter hostnames one per line, up to 20.
- Press Resolve and read each line's addresses.
- Lines that fail show the resolver status so you can tell a typo from a missing record.
Common questions
- Why does a hostname resolve on my machine but not here?
- It is defined in a private DNS zone, a VPN resolver or your hosts file. Public resolvers never see those names.
- Does it show IPv6?
- Yes. AAAA records are queried alongside A records and listed after them.
- What is the CNAME in brackets?
- The alias the name points to before reaching an address. It tells you which service actually hosts the name.