Turkey province boundaries (device-side location)
Source: geoBoundaries gbOpen TUR ADM1, TUR-ADM1-25984515 (2021), Open Street Map.
https://www.geoboundaries.org/api/current/gbOpen/TUR/ADM1/
https://github.com/wmgeolab/geoBoundaries/tree/9469f09/releaseData/gbOpen/TUR/ADM1
License: Creative Commons Attribution-ShareAlike 2.0.
https://creativecommons.org/licenses/by-sa/2.0/
https://www.openstreetmap.org/copyright
Changes by Arayinca: retained only province IDs, boundaries and bounding boxes;
coordinates rounded to five decimal places; converted to a compact JSON format.
This derived dataset is available under the same CC BY-SA 2.0 license.
The underlying boundaries are approximate and do not represent verified service distance.

IP city data (server-side, stored separately in the data volume)
IP Geolocation by DB-IP: https://db-ip.com/
CC BY 4.0 https://creativecommons.org/licenses/by/4.0/
Distributed by https://github.com/sapics/ip-location-db
Changes by Arayinca: Turkey only; province IDs and sorted numeric IP ranges;
all coordinates and detailed city/address fields discarded.