require'resolv'Resolv
Resolv is a thread-aware DNS resolver library written in Ruby. Resolv can handle multiple DNS requests concurrently without blocking the entire Ruby interpreter.
See also resolv-replace.rb to replace the libc resolver with Resolv.
Resolv can look up various DNS resources using the DNS module directly.
Examples:
pResolv.getaddress"www.ruby-lang.org"pResolv.getname"210.251.121.214"Resolv::DNS.opendo|dns|ress=dns.getresources"www.ruby-lang.org",Resolv::DNS::Resource::IN::Apress.map(&:address)ress=dns.getresources"ruby-lang.org",Resolv::DNS::Resource::IN::MXpress.map{|r|[r.exchange.to_s,r.preference]}end