- website server lookup history
- static.duolingo.com
- store.duolingo.com
- www.xuu77.com
- support.duolingo.com
- tinycards.duolingo.com
- tr.duolingo.com
- lanqiapp.com
- vi.duolingo.com
- tr.redatvgold.com
- zombie.duolingo.com
- zendesk4.duolingo.com
- lineacademy.ruangguru.com
- indosat.ruangguru.com
- englishtest.duolingo.com
- blog.duolingo.com
- 777pub.org
- 7.duolingo.com
- 4.duolingo.com
- app.duolingo.com
- duolingo.com