diff --git a/whois/port43/start_whois.php b/whois/port43/start_whois.php
index d717837..dde54c2 100644
--- a/whois/port43/start_whois.php
+++ b/whois/port43/start_whois.php
@@ -111,7 +111,13 @@ $server->on('receive', function ($server, $fd, $reactorId, $data) use ($c, $pool
             
                 // Extract TLD from the domain and prepend a dot
                 $parts = explode('.', $domain);
-                $tld = "." . end($parts);
+                
+                // Handle multi-segment TLDs (e.g., co.uk, ngo.us, etc.)
+                if (count($parts) > 2) {
+                    $tld = "." . $parts[count($parts) - 2] . "." . $parts[count($parts) - 1];
+                } else {
+                    $tld = "." . end($parts);
+                }
 
                 // Check if the TLD exists in the domain_tld table
                 $stmtTLD = $pdo->prepare("SELECT COUNT(*) FROM domain_tld WHERE tld = :tld");