45.181.90.0 is an IPv4 address owned by Dnet Provedor De Internet Ltda and located in São Borja, Brazil
If you believe something above is incorrect, please let us know and report wrong data
~$ curl http://api.db-ip.com/v2/free/45.181.90.0
{
    "ipAddress": "45.181.90.0",
	"continentCode": "SA",
	"continentName": "South America",
	"countryCode": "BR",
	"countryName": "Brazil",
	"stateProv": "Rio Grande do Sul",
	"city": "S\u00e3o Borja",
}
~$ curl http://api.db-ip.com/v2/free/45.181.90.0/countryName
Brazil
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.