147.45.63.0 is an IPv4 address owned by JSC RTComm.RU and located in Elektrostal, Russia
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~$ curl http://api.db-ip.com/v2/free/147.45.63.0
{
    "ipAddress": "147.45.63.0",
	"continentCode": "EU",
	"continentName": "Europe",
	"countryCode": "RU",
	"countryName": "Russia",
	"stateProv": "Moscow Oblast",
	"city": "Elektrostal",
}
~$ curl http://api.db-ip.com/v2/free/147.45.63.0/countryName
Russia
The free API is limited to 500 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.