Access to website using Comcast

I haven't been ignoring this thread, just nothing to say... Been fine for me except on Verizon, but it's been good the past week. AT&T and comcast were always ok. I use all three almost every day. It's an issue with DNS servers not caching the ip addresses, and I'm not sure why. I've got it configured the same as my other sites and they don't have issues.