91.216.53.0 is an IPv4 address owned by Cjsc "Ntc Stek" and located in Chelyabinsk, Russia
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~$ curl http://api.db-ip.com/v2/free/91.216.53.0
{
"ipAddress": "91.216.53.0",
"continentCode": "EU",
"continentName": "Europe",
"countryCode": "RU",
"countryName": "Russia",
"stateProv": "Chelyabinsk",
"city": "Chelyabinsk",
}
~$ curl http://api.db-ip.com/v2/free/91.216.53.0/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.