Airtel IP
IP Geolocation API. Collecting data from multiple sources

Get location information by IP address.
Apiip API is a free Geocoding API that requires apiKey authentication, is served over HTTPS and supports CORS, so it can be called from the browser.
Details from apiip.net.

Unified API suite · now live
Geocode an address, validate an email, track a flight or pull stock data with one account, one dashboard and one API key.
The Apiip API is provided by apiip.net (apiip.net).
Yes. The Apiip API is listed in the Geocoding category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
Yes. The Apiip API uses apiKey authentication, so you need to register for credentials before making requests.
Yes. The Apiip API supports CORS, so front-end JavaScript can call it directly.
Yes. The Apiip API is served over HTTPS, so it's safe to use in production.