diff --git a/public/ip-check.php b/public/ip-check.php
new file mode 100644
index 0000000..e7a994b
--- /dev/null
+++ b/public/ip-check.php
@@ -0,0 +1,19 @@
+<?php
+// Temporary file to check detected IP - DELETE AFTER USE
+
+header('Content-Type: text/plain');
+
+echo "Your detected IP addresses:\n";
+echo "----------------------------\n";
+echo "REMOTE_ADDR:          " . ($_SERVER['REMOTE_ADDR'] ?? 'not set') . "\n";
+echo "HTTP_X_FORWARDED_FOR: " . ($_SERVER['HTTP_X_FORWARDED_FOR'] ?? 'not set') . "\n";
+echo "HTTP_CLIENT_IP:       " . ($_SERVER['HTTP_CLIENT_IP'] ?? 'not set') . "\n";
+echo "HTTP_X_REAL_IP:       " . ($_SERVER['HTTP_X_REAL_IP'] ?? 'not set') . "\n";
+echo "\n";
+
+// Show what the maintenance check would use
+$visitorIp = $_SERVER['HTTP_X_FORWARDED_FOR'] ?? $_SERVER['HTTP_CLIENT_IP'] ?? $_SERVER['REMOTE_ADDR'] ?? '';
+if (str_contains($visitorIp, ',')) {
+    $visitorIp = trim(explode(',', $visitorIp)[0]);
+}
+echo "IP used for whitelist check: " . $visitorIp . "\n";