The following information is known for the address

FAQ

How to perform a IPv4 or IPv6 lookup?

You can direct the service to return your IPv4 or IPv6 address and information by passing the appropiate flag to your client, e.g curl -4 or curl -6.

Returning a JSON response

By setting the Accept: application/json header will work expected, however requesting from the JSON endpoint will return a JSON response.

Is automated use of this service permitted?

This service is available to all, however we do request that for automated use requests are rate limited as follows.

Ensure requests are limited 1 request per minute. Should requests exceed this rate for other than for short bursts, users repeatedly exceeding this limit, maybe further limited. That is they may be rate-limited, with a 429 status code, or dropped entirely.