Headquarters 
Address: Barbaros Mh. Mor Sümbül Sk. 1.Blok
34746 Ataşehir / Istanbul / Turkey 
(Sheraton Ataşehir Altı)
Tel: +90 (212) 276 51 71 (pbx)
Fax: +90 212 285 18 79 
E-mail: info@okcu.com

USA Office 
Address: 16023 S. 35th Way Phoenix, AZ. 85048 USA 
E-mail: usa@okcu.com