Good afternoon and thank you for your reply,

I do apologize for the inconvenience you have all experienced, however I cannot say with any certainty that servers themselves are the issue here.

Thank you for those that have provided information about your ISP. Based on this information, it looks like the issues are coming from a similar region in Europe. While this may not be the fault of any one ISP, any networks that you are connecting to may see excessive traffic or problems at this time. Unfortunately, I can only speculate on this and you may be routed through a troublesome network for this particular game. This would explain why you are able to connect to other websites, but not Final Fantasy XIV.

Saying it's your ISP's fault isn't entirely accurate in this case, it's more of how your ISP decides to connect to the network. Because of this, it becomes difficult to suggest troubleshooting methods aside from the ones listed above.

Again, I do apologize for the inconvenience and hope you can still enjoy the game.