I see a lot of these URL on landers I have downloaded recently (sweeps)
https://tdsjsext.com/ExtService.svc/getextparams
https://tdsjsext1.com/ExtService.svc/getextparams
https://tdsjsext2.com/ExtService.svc/getextparams
https://tdsjsext3.com/ExtService.svc/getextparams
https://tdsjsext4.com/ExtService.svc/getextparams
Each URL returns a JSON file with the user location, city, country...
I can not find any info on these domains. Does anyone know it? Is it based on MaxMind GeoIP, or is it something else?
Thanks!