diff --git a/src/Helpers.php b/src/Helpers.php
index 956e4dd..05ce23e 100644
--- a/src/Helpers.php
+++ b/src/Helpers.php
@@ -26,6 +26,15 @@ public static function maskCpf($value)
         return Mask::cpf($value);
     }
 
+    /**
+     * @param string $value
+     * @return string|null
+     */
+    public static function maskCns($value)
+    {
+        return Mask::cns($value);
+    }
+
     /**
      * @param string  $value
      * @return string|string[]|null
diff --git a/src/Helpers/Mask.php b/src/Helpers/Mask.php
index 1dbb869..fe81746 100644
--- a/src/Helpers/Mask.php
+++ b/src/Helpers/Mask.php
@@ -33,6 +33,19 @@ public static function cpf($value)
         return vsprintf("%s%s%s.%s%s%s.%s%s%s-%s%s", str_split($value));
     }
 
+    /**
+    * @param string $value
+    * @return string|null
+    */
+    public static function cns($value)
+    {
+        $value = preg_replace('/\D/', '', $value);
+        if (strlen($value) < 15) {
+            return null;
+        }
+        return vsprintf("%s%s%s %s%s%s%s %s%s%s%s %s%s%s%s", str_split($value));
+    }
+
     /**
     * @param string  $value
     * @return string|string[]|null