Thanks for your reply. I've sent a support request several days ago but they don't resonse. It seems that not all users are affected, my domains resolve to the IP 208.73.210.29 and the server with this IP is unavailable. May be you use iFrame redirection instead of DNS?
---------- Post added at 07:10 PM ---------- Previous post was at 06:18 PM ----------
I've tried online services which check sites availability from around the globe and see that my domains are unavailable just from several locations including mine
It means that DomainSponsor DNS setup is not a reason. Just network problems.