Cloudflare Workers, PHP, SQL, Maxmind GeoIP, IP2Location Lite
KPNC Technology: Geolocater: A hybrid geolocation service using both a serverless and local server loaded with GeoIP (or GeoLite) and IP2Location(Lite) respectively. GeoIP on a serverless platform is extremely quick and scalable. IP2L provides support for proxy detection and manual lookups.