The whole domain is affected, I’ve tried waiting for a few hours if it was just a temporary issue and sadly its not. I haven’t seen anyone complain about some network outage (Unless there is one and I haven’t seen it), so this is bizarre.
Your domain expired a few weeks ago. You need to renew it with your domain registrar (which seems to be 123-Reg) to get your domain back.
This is not a hosting issue. The IP address your browser is unable to connect to is not related to our hosting, it seems to be from a parking service of your domain provider.