2a03:2887:ff23:: is an IPv6 address owned by Facebook, Inc. and located in Dublin (Ballsbridge), Ireland
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~$ curl http://api.db-ip.com/v2/free/2a03:2887:ff23::
{
    "ipAddress": "2a03:2887:ff23::",
	"continentCode": "EU",
	"continentName": "Europe",
	"countryCode": "IE",
	"countryName": "Ireland",
	"stateProv": "Leinster",
	"city": "Dublin (Ballsbridge)",
}
~$ curl http://api.db-ip.com/v2/free/2a03:2887:ff23::/countryName
Ireland
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.