I am unable to access 1sttix.org from any device (phone/computer - hard wired or wifi) when connected to Cox internet at home. I can access it from my phone plan (verizon) I tried customer support who had me reset system but still does not work.
Can you ping the website? I get IP 220.127.116.11 for that site. If you get a different IP try changing your DNS to Google DNS or Cloudflare. If not can you explain how it doesn't work on Cox? Does it give a HTTP error?