diff --git a/pddnsc/base.py b/pddnsc/base.py
index aa9eaaf..9dea4a0 100644
--- a/pddnsc/base.py
+++ b/pddnsc/base.py
@@ -1,7 +1,8 @@
 import httpx
 import asyncio
 from abc import ABC, abstractmethod
-from typing import NamedTuple
+from typing import NamedTuple, Optional
+from netaddr import valid_ipv4, valid_ipv6
 
 
 class IPAddreses(NamedTuple):
@@ -154,3 +155,11 @@ class BaseFilterProvider(ABC):
 
     @abstractmethod
     async def check_imp(self, source_provider, addr_v4, addr_v6): ...
+
+
+def filter_ipv4(value: str) -> Optional[str]:
+    return value and valid_ipv4(value) and value or None
+
+
+def filter_ipv6(value: str) -> Optional[str]:
+    return value and valid_ipv6(value) and value or None
diff --git a/requirements.txt b/requirements.txt
index 488197d..7a980da 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,3 +2,4 @@ httpx[http2]>=0.26,<1.0
 asyncio>=3.4.3,<4
 aiofiles>=23,<24
 toml>=0.10,<1
+netaddr>=1,<2
\ No newline at end of file