153.153.170.51 or 153-153-170-51-revip-jp2-default.170.153.153.in-addr.arpa is an IPv4 address owned by NTT Communications Corporation and located in Kawagoe, Japan
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~$ curl http://api.db-ip.com/v2/free/153.153.170.51
{
"ipAddress": "153.153.170.51",
"continentCode": "AS",
"continentName": "Asia",
"countryCode": "JP",
"countryName": "Japan",
"stateProv": "Saitama",
"city": "Kawagoe",
}
~$ curl http://api.db-ip.com/v2/free/153.153.170.51/countryName
Japan
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.