$confidence
$confidence : integer|null
This is a value from 0-100 indicating MaxMind's confidence that the subdivision is correct. This attribute is only available from the Insights service and the GeoIP2 Enterprise database.
Contains data for the subdivisions associated with an IP address.
This record is returned by all location databases and services besides Country.
$isoCode : string|null
This is a string up to three characters long contain the subdivision portion of the ISO 3166-2 code. See https://en.wikipedia.org/wiki/ISO_3166-2. This attribute is returned by all location databases and services except Country.