diff --git a/index.php b/index.php
index 935c9cf..50d98b7 100644
--- a/index.php
+++ b/index.php
@@ -145,7 +145,7 @@ function show_dnsrecords($hostname) {
     echo "" . $value['rname'] . " (rname), ";
     echo "" . $value['serial'] . " (serial)<br />\n";
   }
-  
+
   // OTHER
   $dnsrecords = dnsrecords($hostname, "OTHER");
   if(!empty($dnsrecords)) {
@@ -178,8 +178,8 @@ function print_footer() {
 
 // HELPER FUNCTIONS
 function readheader($value) {
-  echo "<strong>" . $value . "</strong>: "; // show desired value 
-  if(isset($_SERVER[$value])) {   // only if desired header has been delivered 
+  echo "<strong>" . $value . "</strong>: "; // show desired value
+  if(isset($_SERVER[$value])) {   // only if desired header has been delivered
     echo $_SERVER[$value];
   }
   echo "<br />\n";
@@ -189,7 +189,12 @@ function ip2hostname($ip) {
   return $hostname;
 }
 function hostname2ip($hostname) {
-  $ip = implode(', ', gethostbynamel($hostname));
+  $ipsbyhostname = gethostbynamel($hostname);
+  if($ipsbyhostname === false) {
+    $ip = $hostname;
+  } else {
+    $ip = implode(', ', gethostbynamel($hostname));
+  }
   return $ip;
 }
 function dnsrecords($hostname, $record = "DNS_ALL") {