Not where you host a server or a server account. Never heard of that.

If you have your own server VPS or Dedicated and 2 ips compile your own DNS server. If you need high capacity then pay for a specialized service or get a separate server as your DNS server.

http://www.zoneedit.com/?ad=lookup
http://www.dyndns.com/

are two backup DNS servers I use ? their free service is limited. However, they are DNS services not hosts in datacenters.