I thought this post went through but apparently it didn't so I'm reposting.
Go to »broadband.mpi-sws.org/transparen ··· test.php
And then select "Usenet (NNTP)" and begin the test. Based on this it seems that TWC is completely blocked Usenet NNTP service off their servers. I tested it and the test failed. I then tethered my phone with Verizon 4G LTE and the test went through successfully. I even had a friend with another connection try it and his worked (non TWC).
So it seems that TWC is blocking this service.