ldc-web/app/Http/Controllers/API/LDCNetworksController.php

<?php

namespace App\Http\Controllers\API;

use App\Http\Controllers\Controller;
use App\Models\LDCNetworks;
use Illuminate\Http\Request;

class LDCNetworksController extends Controller
{
    public function index(Request $request)
    {
        $token = $request->token;

        if ($token !== 'CE8S52Qq7stf5k8frF4T') {
            return response('Unauthorized', 401);
        }

        $ips = [];

        $networks = LDCNetworks::all();
        foreach ($networks as $network) {
            $infos = explode('.', $network->first_ip);
            $min   = $infos[3];
            $max   = explode('.', $network->last_ip)[3];
            for ($i = $min; $i <= $max; $i++) {
                $ips[] = "$infos[0].$infos[1].$infos[2].$i";
            }
        }
        return response($ips);
    }
}