diff --git a/app/Console/Commands/UpdateAtcHours.php b/app/Console/Commands/UpdateAtcHours.php
index 72b2a9a07..f2aa42350 100644
--- a/app/Console/Commands/UpdateAtcHours.php
+++ b/app/Console/Commands/UpdateAtcHours.php
@@ -75,7 +75,7 @@ private function updateMemberATCHours(Collection $members)
         $this->info("Fetching seen ATC positions...");
         $divisionCallsignPrefixes = collect(DB::select(
             DB::raw('SELECT DISTINCT LEFT(callsign, 4) as prefix FROM positions;')
-        ));
+        ))->pluck('prefix');
 
         $this->info("Updating member ATC hours...");
 
@@ -89,8 +89,6 @@ private function updateMemberATCHours(Collection $members)
             }
             $response = $this->makeHttpGetRequest($client, $url);
 
-            $this->info("Checking " . $member->id);
-
             if ($response == null) {
                 Log::error('updateMemberATCHours: Failed to fetch GuzzleHttp Response, url: ' . $url);
                 continue;
@@ -122,16 +120,8 @@ private function updateHoursForMember(User $member, Collection $sessions, Collec
     {
         $this->info("Updating ATC hours for member: " . $member->id);
 
-        $isDivisionCallsign = function ($session) use ($divisionCallsignPrefixes) {
-            try {
-                isDivisionCallsign($session->callsign, $divisionCallsignPrefixes);
-            } catch (\Illuminate\Database\Eloquent\ModelNotFoundException $e) {
-                return false;
-            }
-            return true;
-        };
         $hoursActiveInDivision = $sessions
-            ->filter($isDivisionCallsign)
+            ->filter(fn($session) => isDivisionCallsign($session->callsign, $divisionCallsignPrefixes))
             ->map(function ($session) {
                 return floatval($session->minutes_on_callsign);
             })
diff --git a/app/Helpers/Vatsim.php b/app/Helpers/Vatsim.php
index f09bff9e9..449d56da2 100644
--- a/app/Helpers/Vatsim.php
+++ b/app/Helpers/Vatsim.php
@@ -32,8 +32,7 @@ function isDivisionCallsign(string $callsign, Collection $divisionCallsignPrefix
     }
     
     // PREFIX
-    
-    if ($divisionCallsignPrefixes->value(substr($callsign, 4))) {
+    if ($divisionCallsignPrefixes->contains(substr($callsign, 0, 4))) {
         return true;
     }