_cfx._udp.play.northgaterp.com. 300 IN SRV 0 0 30125 northgaterp.com.
And the play hostname also resolves:
play.northgaterp.com. 300 IN A 135.148.52.97
I’m not familiar with the application you’re using so I can’t really tell whether it’s configured correctly, but your DNS looks fine.
EDIT: Oh, you have the SRV record pointing to northgaterp.com, which is probably not correct. There is no A record for that name. Maybe it’s meant to point to play.northgaterp.com?