We pick k.root-servers.net, one of the 13 root servers (1), and ask it about beyondvoice.com and learn that com is delegated to 13 name servers (2), so we ask a.gtld-servers.net where we learn that beyondvoice.com is delegated to two name servers, including ns1.linode.com (3), so we ask that one and get the following answer:
Beyondvoice.com is a domain controlled by five domain name servers at linode.com having a total of ten IP numbers. All ten of them are on different IP networks. Incoming mail for beyondvoice.com is handled by five mail servers at googlemail.com and google.com having a total of 49 IP numbers. There are 14 duplicated IP numbers. Some of them are on the same IP network. Beyondvoice.com has one IP number (126.96.36.199), which also has a corresponding reverse pointer.