diff --git a/lib/nntp/tiny/host.py b/lib/nntp/tiny/host.py
new file mode 100644
index 0000000..29eb2c7
--- /dev/null
+++ b/lib/nntp/tiny/host.py
@@ -0,0 +1,22 @@
+class Host():
+    @staticmethod
+    def is_ipv6(value: str):
+        return value.find(':') >= 0
+
+    @staticmethod
+    def is_ipv4(value: str):
+        parts = value.split('.')
+
+        if len(parts) > 4 or len(parts) == 0:
+            return False
+
+        for part in parts:
+            if not part.isdecimal():
+                return False
+
+            num = int(part)
+
+            if num > 255:
+                return False
+
+        return True
diff --git a/lib/nntp/tiny/server.py b/lib/nntp/tiny/server.py
index 38669de..b2fc21d 100644
--- a/lib/nntp/tiny/server.py
+++ b/lib/nntp/tiny/server.py
@@ -7,6 +7,7 @@ import ssl
 
 from nntp.tiny.config    import Config, ConfigException
 from nntp.tiny.db        import Database
+from nntp.tiny.host      import Host
 from nntp.tiny.newsgroup import Newsgroup
 from nntp.tiny.session   import Session
 
@@ -67,28 +68,6 @@ class Server():
         thread = threading.Thread(target=spawn)
         thread.start()
 
-    @staticmethod
-    def _is_ipv6(value: str):
-        return value.find(':') >= 0
-
-    @staticmethod
-    def _is_ipv4(value: str):
-        parts = value.split('.')
-
-        if len(parts) > 4 or len(parts) == 0:
-            return False
-
-        for part in parts:
-            if not part.isdecimal():
-                return False
-
-            num = int(part)
-
-            if num > 255:
-                return False
-
-        return True
-
     def run(self):
         hosts = re.split(r'\s*,\s*', self.config.get('listen', 'host'))
         port  = int(self.config.get('listen', 'port'))
@@ -96,9 +75,9 @@ class Server():
         listeners = list()
 
         for host in hosts:
-            if Server._is_ipv6(host):
+            if Host.is_ipv6(host):
                 listeners.append(self.listen(host, port, socket.AF_INET6))
-            elif Server._is_ipv4(host):
+            elif Host.is_ipv4(host):
                 listeners.append(self.listen(host, port, socket.AF_INET))
             else:
                 for af in (socket.AF_INET, socket.AF_INET6):