161.64.20.147 is an IPv4 address owned by University of Macau and located in Cotai, Macao
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~$ curl http://api.db-ip.com/v2/free/161.64.20.147
{
"ipAddress": "161.64.20.147",
"continentCode": "AS",
"continentName": "Asia",
"countryCode": "MO",
"countryName": "Macao",
"stateProv": "Cotai",
"city": "Cotai",
}
~$ curl http://api.db-ip.com/v2/free/161.64.20.147/countryName
Macao
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.