A Record Lookup - Free DNS A Record Checker

Easily check A records to find the IPv4 address of any domain. Use our A record checker to verify DNS settings and ensure your website resolves properly

Global DNS propagation takes up to 48 hours!

Track global results with a DNS propagation checker!

An A record lookup shows the IPv4 addresses a domain or hostname points to. The A (address) record is what sends visitors to the right server: when someone opens example.com, their browser looks up its A record and connects to that IP.

How to check A records

  1. Enter a domain or hostname, e.g. example.com or www.example.com. They are separate names and can have different records.
  2. Choose a DNS server and click Search.

From a terminal: dig example.com A or nslookup example.com.

Understanding your results

  • Value is the IPv4 address. Run an IP Address Lookup on it to see which hosting company or network it belongs to.
  • Several A records for one name are normal: resolvers return all of them and clients spread connections across the servers.
  • A CNAME in the results means the name is an alias; the A record belongs to the target hostname. See the CNAME Lookup.
  • CDN addresses: sites behind Cloudflare or another CDN show the CDN's IPs, not the origin server's, and the answer can vary by location.

Common A record problems

  • Site still opens the old server after a migration. Resolvers are serving the cached old record until the TTL expires. Check progress with the DNS Propagation Checker.
  • Bare domain works but www doesn't (or the reverse). Each needs its own A record, or www needs a CNAME to the bare domain.
  • IPv6 visitors still reach the old server. You updated the A record but forgot the AAAA record.
  • A record points to a private IP such as 192.168.x.x or 10.x.x.x. Those are only reachable inside a local network.

Frequently asked questions

What is the difference between an A record and a CNAME?

An A record maps a name directly to an IPv4 address. A CNAME maps a name to another name, whose own A record supplies the address. Use a CNAME when the target's IP may change, for example a hosted service.

What is the difference between A and AAAA records?

A records hold IPv4 addresses (32 bits, like 203.0.113.7). AAAA records hold IPv6 addresses (128 bits, like 2001:db8::7). A domain can have both.

How do I find which server a website is on?

Look up its A record here to get the IP, then run a WHOIS lookup or IP lookup on that IP to see which provider holds it. If the IP belongs to a CDN, the origin server is hidden.

What TTL should an A record have?

One hour (3600) is a common default. Lower it to around 300 seconds a day before a planned move so the change takes effect quickly, then raise it again.