[reincoder]

Yes, we do use user agents to separate requests to our websites and API service. However, we request users to switch to api.ipinfo.io (dedicated API infrastructure) and use ipinfo.io/json for an explicit request for the API endpoint.

There are indeed some limitations to this implementation. The primary one being IPv6 support. The implementation prioritizes convenience over internet limitations, requiring us to roll out IPv6 dual stacking on the web request level as opposed to the DNS level. On an API level, this results in users with IPv6 addresses making API requests to v6.ipinfo.io.

So, last year we rolled out dedicated API infrastructure for api.ipinfo.io