I want to switch to Comcast internet but AT&T hosts my web address. Can I still use my web page and address?

Answer 1

I would contact AT&T, if your not using them as a provider they are going to shut down your site since your not paying for their service....
If you used a tool like site builder, make sure you back up the web site to your pc so you can upload it to your new provider if need be.....

Answer 2

This is why you never use the isp's email address they give you. If you switch you'll have to let everyone who emails you know of your change of address. If you do change get a Yahoo or Hotmail account. This way it doesn't matter who your isp is you will have the same email address for life.