http://www.root-servers.org/ http://www.root-servers.org/ has the answers you seek. There are currently 13 root servers operated by 12 different entities (Veri

http://www.root-servers.org/ http://www.root-servers.org/ has the answers you seek. There are currently 13 root servers operated by 12 different entities (Verizon, NASAN, RIPE, ICANN, etc.) and most locations have multiple sites (physical instances).