What is my IP address?

CLI examples

$ curl blog.cajwan.cz
10.3.94.153

$ http -b blog.cajwan.cz
10.3.94.153

$ wget -qO- blog.cajwan.cz
10.3.94.153

$ fetch -qo- https://blog.cajwan.cz
10.3.94.153

$ bat -print=b blog.cajwan.cz/ip
10.3.94.153

JSON output

$ http blog.cajwan.cz/json
{
  "ip": "10.3.94.153",
  "ip_decimal": 167992985,
  "country_eu": false
}

Setting the Accept: application/json header also works as expected.

Plain output

Always returns the IP address including a trailing newline, regardless of user agent.

$ http blog.cajwan.cz/ip
10.3.94.153

FAQ

How do I force IPv4 or IPv6 lookup?

As of 2018-07-25 it's no longer possible to force protocol using the v4 and v6 subdomains. IPv4 or IPv6 still can be forced by passing the appropiate flag to your client, e.g curl -4 or curl -6.

Is automated use of this service permitted?

Yes, as long as the rate limit is respected. The rate limit is in place to ensure a fair service for all.

Please limit automated requests to 1 request per minute. No guarantee is made for requests that exceed this limit. They may be rate-limited, with a 429 status code, or dropped entirely.

Can I run my own service?

Yes, the source code and documentation is available on GitHub.