This could be one or more of any reasons below:
1. Your ip is blocked by Trickbyte server because you have generated DDOS attack to/with our server. This against our term of service and may lead to termination of your account. Please scan your pc with valid virus cleaner and contact support
2. Your isp has blocked our dns. You can fix it by try all of our dns to find out which one is not blocked.
3. Your isp has hijacked dns. We can’t help with this.