125.31.37.159 is an IPv4 address owned by CTM Internet Service and located in Macao, Macao
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~$ curl http://api.db-ip.com/v2/free/125.31.37.159
{
"ipAddress": "125.31.37.159",
"continentCode": "AS",
"continentName": "Asia",
"countryCode": "MO",
"countryName": "Macao",
"city": "Macao",
}
~$ curl http://api.db-ip.com/v2/free/125.31.37.159/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.