176.21.0.0 or 176-21-0-0-static.dk.customer.tdc.net is an IPv4 address owned by TDC Holding A/S and located in Viby J, Denmark
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~$ curl http://api.db-ip.com/v2/free/176.21.0.0
{
"ipAddress": "176.21.0.0",
"continentCode": "EU",
"continentName": "Europe",
"countryCode": "DK",
"countryName": "Denmark",
"stateProv": "Central Jutland",
"city": "Viby J",
}
~$ curl http://api.db-ip.com/v2/free/176.21.0.0/countryName
Denmark
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.