91.213.196.203 or rtl03.radio.tools is an IPv4 address owned by Netrack and located in Velikiye Luki, Russia
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~$ curl http://api.db-ip.com/v2/free/91.213.196.203
{
"ipAddress": "91.213.196.203",
"continentCode": "EU",
"continentName": "Europe",
"countryCode": "RU",
"countryName": "Russia",
"stateProv": "Pskov Oblast",
"city": "Velikiye Luki",
}
~$ curl http://api.db-ip.com/v2/free/91.213.196.203/countryName
Russia
The free API is limited to 1,000 daily requests and returns city level location data only, if you require larger query volumes or more information such as latitude/longitude, ISP details or threat level assessment, please see our commercial offers.