137.101.54.101 is an IPv4 address owned by Vodafone Espana S.A.U. and located in Madrid, Spain
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~$ curl http://api.db-ip.com/v2/free/137.101.54.101
{
"ipAddress": "137.101.54.101",
"continentCode": "EU",
"continentName": "Europe",
"countryCode": "ES",
"countryName": "Spain",
"stateProv": "Madrid",
"city": "Madrid",
}
~$ curl http://api.db-ip.com/v2/free/137.101.54.101/countryName
Spain
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.