diff --git a/countries.txt b/countries.txt
index 7b5ef0a..a7a3592 100644
--- a/countries.txt
+++ b/countries.txt
@@ -1,5 +1,6 @@
 ad => Andorran 
-ar => Argentinan 
+ar => Argentinan
+at => Austria
 au => Australia
 bd => Bangladesh 
 be => Belgium
diff --git a/include/phone.at.inc b/include/phone.at.inc
new file mode 100644
index 0000000..35a92a1
--- /dev/null
+++ b/include/phone.at.inc
@@ -0,0 +1,51 @@
+<?php
+
+/**
+ * @file
+ * CCK Field for Austrian phone numbers.
+ */
+
+define('PHONE_AT_REGEX', "%(\+43|0|0043)(\d{5,11})$%");
+
+function phone_at_metadata() {
+  // These strings are translated using t() on output.
+  return array(
+    'error' => '"%value" is not a valid Austrian phone number.<br>Austrian phone numbers should only contain numbers and spaces and be like 07582 99 999',
+  );
+}
+
+/**
+ * Verification for private/standr Austrian Phone Numbers (E.164/2002).
+ * According to https://en.wikipedia.org/wiki/Telephone_numbers_in_Austria
+ *
+ * @param string $phonenumber
+ * @return boolean Returns FALSE if the phone number is not valid.
+ */
+function valid_at_phone_number($phonenumber) {
+  $phonenumber = str_replace(array(' ','-','.','/','(',')'), '', $phonenumber);
+  $match = array();
+  $result = (bool) preg_match(PHONE_AT_REGEX, $phonenumber, $match);
+  return $result;
+}
+
+/**
+ * Formatting for Austrian Phone Numbers.
+ *
+ * @param string $phonenumber
+ * @return string Returns a string containing the phone number with some formatting.
+ */
+function format_at_phone_number($phonenumber, $field = FALSE) {
+  $phone  = str_replace(array(' ','-','.','/','(',')'), '', $phonenumber);
+  $matches = array();
+  if (preg_match(PHONE_AT_REGEX, $phone, $matches) != 1) {
+    return $phonenumber; // not a Austrian phone number
+  }
+
+  $prefix_length =  ((bool) preg_match('/(6|720|8)\d*$/', $matches[2])) ? 4 : 5;
+
+  $value = ($field && $field['phone_country_code'] ? '+43 (0) ' : '0') .
+            substr($matches[2], 0, $prefix_length - 1).
+            ' ' . substr($matches[2], $prefix_length - 1);
+
+  return $value;
+}
diff --git a/phone.module b/phone.module
index 9be0fd0..aa0ffd9 100644
--- a/phone.module
+++ b/phone.module
@@ -16,6 +16,7 @@ function phone_countries($code = NULL) {
       'it' => 'Italy',
       'el' => 'Greece',
       'ch' => 'Switzerland',
+      'at' => 'Austria',
       'ca' => 'US & Canada',
       'cr' => 'Costa Rica',
       'pa' => 'Panama',
@@ -46,6 +47,7 @@ function phone_countries($code = NULL) {
       'int' => 'International Phone Numbers per E.123',
     );
   }
+  asort($countries);
   return ($code === NULL) ? $countries : (isset($countries[$code]) ? $countries[$code] : NULL);
 }