diff --git a/src/Validator.php b/src/Validator.php
index bad9344..3e5ec0e 100644
--- a/src/Validator.php
+++ b/src/Validator.php
@@ -16,6 +16,7 @@ class Validator
         'AT' => 'U[A-Z\d]{8}',
         'BE' => '(0\d{9}|\d{10})',
         'BG' => '\d{9,10}',
+        'BY' => '\d{9}',
         'CY' => '\d{8}[A-Z]',
         'CZ' => '\d{8,10}',
         'DE' => '\d{9}',
@@ -39,10 +40,13 @@ class Validator
         'PL' => '\d{10}',
         'PT' => '\d{9}',
         'RO' => '\d{2,10}',
+        'RS' => '\d{9}',
+        'RU' => '(\d{10}|\d{12})',
         'SE' => '\d{12}',
         'SI' => '\d{8}',
         'SK' => '\d{10}',
         'SM' => '\d{5}',
+        'TR' => '\d{10}',
     ];
 
     /**