153.1.0.0 is an IPv4 address owned by Tampere University Foundation and located in Tampere, Finland
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~$ curl http://api.db-ip.com/v2/free/153.1.0.0
{
"ipAddress": "153.1.0.0",
"continentCode": "EU",
"continentName": "Europe",
"countryCode": "FI",
"countryName": "Finland",
"stateProv": "Tampere",
"city": "Tampere",
}
~$ curl http://api.db-ip.com/v2/free/153.1.0.0/countryName
Finland
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.