diff --git a/index.php b/index.php
index d283e3f..6c254f2 100644
--- a/index.php
+++ b/index.php
@@ -165,15 +165,20 @@ if ($errors=='' && $_GET['acctock']!='' && $_GET['host']!='') {
 	}
 	$acchostck=htmlentities($acchostck);
 	$http_response_header=null;
+	$httpcode=null;
 	$url=$_GET['host'].'/api/v1/accounts/lookup?acct='.urlencode($_GET['acctock']);
 	$hacctock=htmlentities($_GET['acctock']);
 	$hurl=htmlentities($url);
 	$res=@file_get_contents('https://'.$url,false,$context);
 	//echo preprint($http_response_header);
-	if (isset($http_response_header))
+	if (isset($http_response_header)) {
+		$httpcode=gethttpcode($http_response_header);
 		$rl=ckratelimit($http_response_header,'echofun',true,false);
+	}
 	if ($res===false) {
 		echo "<div class=\"error\">Error: could not connect to «{$hhost}».</div>\n";
+	} elseif (isset($httpcode) && $httpcode!='200') {
+		echo "<div class=\"error\">Error: «{$hurl}» returned an HTTP code that is different than «200»: <a href=\"https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/{$httpcode}\">{$httpcode}</a>.</div>\n";
 	} elseif (null===$res=@json_decode($res,true)) {
 		echo "<div class=\"error\">Error: «{$hurl}» returned data that could not be parsed as JSON (".json_last_error().': '.json_last_error_msg().").</div>\n";
 	} elseif (isset($res['error'])) {