The methods are a easy to use and require access to the Internet and a DNS server which must be configure in your TCP/IP settings for the machine you're operating.
loIP = CREATEOBJECT("wwIPStuff")
*** Domain Lookups from IP Address and Reverse Domain Lookups
? loIP.GetDomainFromIp("205.162.195.2")
? loIP.GetIpFromDomain("ftp.west-wind.com")