Add Airtel IP (#1144)

README.md

@@ -430,6 +430,7 @@ API | Description | Auth | HTTPS | CORS |
 |---|---|---|---|---|
 | [Abstract IP Geolocation](https://www.abstractapi.com/ip-geolocation-api) | Geolocate website visitors from their IPs | `apiKey` | Yes | Yes |
 | [adresse.data.gouv.fr](https://adresse.data.gouv.fr) | Address database of France, geocoding and reverse | No | Yes | Unknown |
+| [Airtel IP](https://sys.airtel.lv/ip2country/1.1.1.1/?full=true) | IP Geolocation API. Collecting data from multiple sources | No | Yes | Unknown |
 | [Battuta](http://battuta.medunes.net) | A (country/region/city) in-cascade location API | `apiKey` | No | Unknown |
 | [Bing Maps](https://www.microsoft.com/maps/) | Create/customize digital maps based on Bing Maps data | `apiKey` | Yes | Unknown |
 | [bng2latlong](https://www.getthedata.com/bng2latlong) | Convert British OSGB36 easting and northing (British National Grid) to WGS84 latitude and longitude | No | Yes | Yes |