Openquiz LTD Address: Hung Nghia 4 Hamlet, Lam Thanh Commune, Hung Nguyen District, Nghe An Province Enterprise code: 2902266403 Phone: 0868650510 Representative: Phan Nguyen Duc Hieu Hung Nguyen District, Nghe An ProvinceFounding date: 4 - 3 - 2026