I have restarted the server and all the services (made no difference) still more than 30% of my sites are not resolving. Checked it out on IntoDNS.com and the only complaint there was a lack of a PTR entry. It may be a coincidence that this was after a major failure of the Data Center network. All Sites ping OK by domain name. Getting no help from my loco hosts who replied "welcome to Loco we supply power and bandwidth"