I spend the past 2 days figuring out all the new servers ip ranges and i finally got them all:
5.42.168.0-5.42.175.255,
5.42.184.0-5.42.191.255,
15.184.0.0-15.185.255.255,
157.175.0.0-157.175.255.255,
5.42.187.0-5.42.187.255,
5.42.191.0-5.42.191.255,
5.42.188.0-5.42.188.255,
34.88.237.0-34.88.237.255,
35.246.173.0-35.246.173.255,
34.88.79.0-34.88.79.255,
34.64.0.0-34.127.255.255,
35.208.0.0-35.247.255.255
You have to block them as an inbound & outbound rules for this to take effect.
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iirc, the IP addresses change every so often, so this may become inacurate
When i previosly blocked the EU servers when the change to server selection went live and those ips never changed, For now it seems they only added some due to the game going f2p
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I blocked all these (and some more for simplicity).
I got a lot of “could not join game server”
then a game on NA
then a game on EU.
So its not a complete list yet 
Following is Digity’s block list reordered with comments.
I also removed the ‘,’ characters so its easier to double-click for copy paste.
15.184.0.0 -15.185.255.255
i blocked these
157.175.0.0 -157.175.255.255
i blocked these
5.42.168.0 -5.42.175.255
5.42.184.0 -5.42.191.255 > note this includes all following 5.42 rules
5.42.187.0 -5.42.187.255
5.42.188.0 -5.42.188.255
5.42.191.0 -5.42.191.255
i blocked 5.42.0.0-5.42.255.255 because that was my old ow1 rule
34.64.0.0 -34.127.255.255 > note this includes the following 34 rules
34.88.79.0 -34.88.79.255
34.88.237.0 -34.88.237.255
i blocked 34.64.0.0-34.127.255.255
35.208.0.0 -35.247.255.255 > note this includes all following 35 rules
35.246.173.0 -35.246.173.255
i blocked 35.208.0.0-35.247.255.255
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