diff --git a/incoming.php b/incoming.php
index 63dadc0..450a801 100755
--- a/incoming.php
+++ b/incoming.php
@@ -35,7 +35,12 @@ $prefixLen = strlen($countryPrefix);
 
 if (substr($callerId, 0, $prefixLen) === $countryPrefix)
         $callerId = substr($callerId, $prefixLen);
+// Checks if phone number is on the blacklist
 
+if ($db->getValue('SELECT COUNT(*) > 0 FROM blacklist WHERE phone = #', [$callerId])) {
+        Agi::exec('HANGUP');
+        exit;
+        
 // Checks schedules
 
 if ($countryCode) {