71.152.37.143 or server-71-152-37-143.nrt51.r.cloudfront.net is an IPv4 address owned by Amazon.com and located in Chiyoda City, Japan
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~$ curl http://api.db-ip.com/v2/free/71.152.37.143
{
"ipAddress": "71.152.37.143",
"continentCode": "AS",
"continentName": "Asia",
"countryCode": "JP",
"countryName": "Japan",
"stateProv": "Tokyo",
"city": "Chiyoda City",
}
~$ curl http://api.db-ip.com/v2/free/71.152.37.143/countryName
Japan
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.