izyim/app/Models/AddressBook.php

<?php

namespace App\models;

use Illuminate\Database\Eloquent\Model;

class AddressBook extends model
{
    protected $table = 'address_book';

    protected $fillable = [
        'company_id', 'reference', 'contact', 'street_one', 'street_two', 'city', 'state', 'post_code', 'country', 'default', 'billing'
    ];

    public function company()
    {
        return $this->belongsTo('App\Models\Company');
    }
}