You could throw in IL instead of US. It just attributes a region to it because I don't know where the TX servers are located (assumedly Austin or Houston) but it really doesnt matter cause TX is the southern region, such as LA is west and NY is east. I've noticed that since January, the Chicago Goldrush server completely died. Possibly due to the name change.
I consider myself an average player, so I don't look for IPs I just look for the server name so I had no idea that Chicago was now US until today.