Tcdd kurumsal mailing
You're looking for the corporate mailing address of Turkish State Railways (TCDD).
Here is the mailing address:
Türk Cumhuriyeti Devlet Demiryolları (TCDD) Ankara Yolu 3.Km. 06520 Ankara Türkiye
You can also contact TCDD through their official website: www.tcdd.gov.tr
Additionally, you can reach out to TCDD's corporate office through their phone number: +90 312 309 30 00
Please note that this information is subject to change, and it's always a good idea to verify the contact information before sending any mail or making a phone call.