diff --git a/oertliche.php b/oertliche.php
new file mode 100644
index 0000000..0799643
--- /dev/null
+++ b/oertliche.php
@@ -0,0 +1,83 @@
+<?php
+
+// Remove &nbsp; and leading/trailing whitespace
+function tidyString($s) {
+  return trim(str_replace("\xc2\xa0", '', $s));
+}
+
+// Split 'Lastname [Firstname1 [Firstname2]]' into key-value pairs 'fn'=>'Firstname1 Firstname2','ln'=>'Lastname'
+function splitName($name) {
+  $res = array('fn' => '', 'ln' => '');
+  $a = explode(' ', $name, 2);
+  $res['ln'] = $a[0];
+  if (count($a) > 1)
+    $res['fn'] = $a[1];
+  return $res;
+}
+
+// Split '[Street 1 a,]12345 City' into key-value pairs 'st'=>'Street','nr'=>'1a','ct'=>'City'
+function splitAddress($address) {
+  $res = array('st' => '', 'nr' => '', 'ct' => '');
+  if (preg_match('/^((.+) (\d+.*),)?(\d+) (.+)$/', $address, $m)) {
+    $res['st'] = $m[2];
+    $res['nr'] = str_replace(' ', '', $m[3]);
+    $res['ct'] = strtok($m[5], ','); # Remove suburb from name
+  }
+  return $res;
+}
+
+// Output Gigaset error response
+function printError($id) {
+  echo '<error repsonse="get_list" type="pb"><errorid>' . $id . '</errorid></error>';
+}
+
+// Output Gigaset phonebook search response
+function printResponse($entry) {
+  echo '<list response="get_list" type="pb" ';
+  // No result:
+  if (!is_array($entry) || !array_key_exists('ln', $entry) || empty($entry['ln'])) {
+    echo 'notfound="hm" total="0"/>';
+  }
+  // Person found:
+  else {
+    echo 'total="1" first="1" last="1"><entry>';
+    echo '<ln>' . $entry['ln'] . '</ln>';
+    if (array_key_exists('fn', $entry) && !empty($entry['fn']))
+      echo '<fn>' . $entry['fn'] . '</fn>';
+    if (array_key_exists('st', $entry) && !empty($entry['st']))
+      echo '<st>' . $entry['st'] . '</st>';
+    if (array_key_exists('nr', $entry) && !empty($entry['nr']))
+      echo '<nr>' . $entry['nr'] . '</nr>';
+    if (array_key_exists('ct', $entry) && !empty($entry['ct']))
+      echo '<ct>' . $entry['ct'] . '</ct>';
+    if (array_key_exists('hm', $entry) && !empty($entry['hm']))
+      echo '<hm>' . $entry['hm'] . '</hm>';
+    echo '</entry></list>';
+  }
+}
+
+// Reverse phone number search on DasOertliche.de
+function lookupCaller($number) {
+  $dom = new DOMDocument();
+  if (!@$dom->loadHTML(file_get_contents('http://www.dasoertliche.de/Controller?form_name=search_inv&ph=' . $number)))
+    return;
+  $xp = new DomXPath($dom);
+  $name = tidyString($xp->evaluate('string(//div[@id="entry_1"]//a[normalize-space(@class)="name"]/span[1])'));
+  $addr = tidyString($xp->evaluate('string(//div[@id="entry_1"]//address[1])'));
+  return array_merge(splitName($name), splitAddress($addr), array('hm' => $number));
+}
+
+header('Content-Type: text/xml; charset=utf-8');
+echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n\r\n";
+if (isset($_GET['hm']) && is_numeric($_GET['hm'])) {
+  $caller = lookupCaller($_GET['hm']);
+  if (is_array($caller))
+    printResponse($caller);
+  else
+    printError(6); # Service not available
+}
+else {
+  printResponse(NULL);
+}
+
+?>