78.12.5.194 or ec2-78-12-5-194.mx-central-1.compute.amazonaws.com is an IPv4 address owned by Amazon.com and located in Querétaro City, Mexico
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~$ curl http://api.db-ip.com/v2/free/78.12.5.194
{
"ipAddress": "78.12.5.194",
"continentCode": "NA",
"continentName": "North America",
"countryCode": "MX",
"countryName": "Mexico",
"stateProv": "Quer\u00e9taro",
"city": "Quer\u00e9taro City",
}
~$ curl http://api.db-ip.com/v2/free/78.12.5.194/countryName
Mexico
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.