diff --git a/.gitignore b/.gitignore
index 9106b2a..63d50ed 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,4 @@
 /pkg/
 /spec/reports/
 /tmp/
+/production/
diff --git a/lib/xmon.rb b/lib/xmon.rb
index 2015d8a..a64b6ce 100644
--- a/lib/xmon.rb
+++ b/lib/xmon.rb
@@ -12,6 +12,7 @@
 require_relative "xmon/dns"
 require_relative "xmon/rdap"
 require_relative "xmon/reverse_dns"
+require_relative "xmon/whois"
 
 module Xmon
   class Error < StandardError; end
diff --git a/lib/xmon/descriptions.rb b/lib/xmon/descriptions.rb
index 7291b40..fde4df9 100644
--- a/lib/xmon/descriptions.rb
+++ b/lib/xmon/descriptions.rb
@@ -80,6 +80,11 @@ def dns(&)
       @description = Xmon::DNS.new(self)
       describe(&)
     end
+
+    def whois(&)
+      @description = Xmon::Whois.new(self)
+      describe(&)
+    end
   end
 
   class IPv4Description < Description
diff --git a/lib/xmon/whois.rb b/lib/xmon/whois.rb
index b66df79..0cf0863 100644
--- a/lib/xmon/whois.rb
+++ b/lib/xmon/whois.rb
@@ -2,8 +2,29 @@
 
 module Xmon
   class Whois < Description
+    def initialize(parent, **opts)
+      @parent = parent
+      @domain = parent.name
+      define_attributes([:registrant, :registrar, :expires])
+    end
+
     def fetch(record)
-      ::Whois.whois(record)
+      response = ::Whois.whois(record)
+      # only joker.com compatible
+      {
+        registrar: response.match(/Registrar URL: https:\/\/(.*)/)[1].strip,
+        registrant: response.match(/Registrant Organization: (.*)/)[1].strip,
+        expiration: response.match(/Registrar Registration Expiration Date: (.*)/)[1].strip,
+        status: response.match(/Domain Status: (.*)/)[1].strip
+      }
+    end
+
+    def check
+      checker = fetch(@domain)
+      [Xmon.compare(@status, checker[:status].split(" ").first, self),
+        Xmon.compare(@registrant, checker[:registrant], self),
+        Xmon.compare(@registrar, checker[:registrar], self),
+        Xmon.compare(@expires, checker[:expiration][0, 10], self)]
     end
   end
 end