# Pastebin PX8od4Y1
require 'csv'
require 'whois'

File.open('myfile.txt', 'w+') do |file|
  CSV.foreach('tld.csv', headers: true) do |row|
    begin
      file.puts Whois.whois(row.first).created_on
    rescue Whois::WebInterfaceError
    end
  end
end