81.15.128.0 or ip-81-15-128-0.unregistered.net.exatel.pl is an IPv4 address owned by Exatel S.A. and located in Warsaw (Praga Południe), Poland
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~$ curl http://api.db-ip.com/v2/free/81.15.128.0
{
"ipAddress": "81.15.128.0",
"continentCode": "EU",
"continentName": "Europe",
"countryCode": "PL",
"countryName": "Poland",
"stateProv": "Mazovia",
"city": "Warsaw (Praga Po\u0142udnie)",
}
~$ curl http://api.db-ip.com/v2/free/81.15.128.0/countryName
Poland
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.