4.166.37.9 is an IPv4 address owned by Microsoft Corporation and located in Gävle, Sweden
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~$ curl http://api.db-ip.com/v2/free/4.166.37.9
{
"ipAddress": "4.166.37.9",
"continentCode": "EU",
"continentName": "Europe",
"countryCode": "SE",
"countryName": "Sweden",
"stateProv": "G\u00e4vleborg",
"city": "G\u00e4vle",
}
~$ curl http://api.db-ip.com/v2/free/4.166.37.9/countryName
Sweden
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.