Nostalrius Begins - Quality wow vanilla realm (1.12)

Hello guys, first time im on this Website to play Vanilla WoW because a Friend of mine recommended it to me.
The actual problem is that i cant register because it says "Registration failed! This IP is not allowed to create other accounts." the point that i dont understand is that i cant remember that ive ever visited this site before. I tried to get a new ip adress (router restart etc.) aswell , didnt work. tried to use another username, didnt work. Maybe i have an account but i totally forgot it? i seriously cant remember.

im greatful for every answer.
Thank you

Try and create an account using your smartphone or a VPN or somehting and see if that works. You can only create two accounts on a single IP (you can still play on them from the same IP but you can't register them).