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A Record Lookup

An A record lookup returns the IPv4 addresses published for a domain, each with its TTL.

This check runs on our server. The address you enter is used only for this check and is not stored.
Updated

This check runs on our server. The address you enter is used only for this check and is not stored.

How to use the A Record Lookup

  1. Enter the domain.
  2. Choose Cloudflare, Google, Quad9, or the domain's own name servers.
  3. Tick the robot check and press Look up.
  4. Each row is one IPv4 address and the seconds it may be cached.

How it works

This check runs on our server. The domain is used only for this query and is not stored.

An A query asks for IPv4 only. If the name is a CNAME, the answer can include the alias and the address it points at, because resolvers follow that chain when recursion is on. Authoritative mode first finds the NS hosts, resolves them to public addresses, and sends the A query there. Addresses in private ranges are not used as name servers.

Examples

  • A domain with two A records shows two rows. Browsers and mail servers may use either.
  • A TTL of 300 means a resolver may keep that address for five minutes.
  • A name with no A records returns "The domain has no A records." It may still have AAAA.

Limitations

  • IPv6 is a separate query. Use the AAAA lookup for those addresses.
  • The result is the DNS answer, not a measurement of which address is closest to you.
  • CDN domains often return different addresses to different resolvers. That is the network doing its job.

Frequently asked questions

What is an A record?

It maps a name to an IPv4 address, four numbers such as 93.184.216.34.

Why do I see several addresses?

The zone published more than one A record. Clients pick among them. A load balancer or a CDN often does this.

Does this show where the server is located?

No. The tool returns the address from DNS. It does not look up a city or a country for that IP.

Often used together with the A Record Lookup.

  • DNS Lookup

    One table of A, AAAA, MX, NS, TXT, SOA, and CAA records for a domain.

  • NS Lookup

    Name servers from the NS records, with TTL.