fetus

🇨🇿チェコCzech Republic


割り振り一覧

チェコに割り振りされたIPアドレスの一覧です。

大体のケースでは「Merged CIDR」の表示の方が便利です。

データをアクセス制御に使いたい方は「ダウンロード」をご利用ください。

チェコには9,552,000個のIPアドレスが割り振られています。これは全アドレス空間の0.22240%、予約領域を除くと0.25801%です。


201-400 of 1749 rows
CIDRIPアドレス割り振り日レジストリ
46.255.224.0/2146.255.224.0 - 46.255.231.2552010/01/06RIPE NCC
62.3.49.0/2462.3.49.0 - 62.3.49.2552021/11/09RIPE NCC
62.4.96.0/2162.4.96.0 - 62.4.103.2552001/06/11RIPE NCC
62.4.104.0/2262.4.104.0 - 62.4.107.2552001/06/11RIPE NCC
62.4.108.0/2262.4.108.0 - 62.4.111.2552001/06/11RIPE NCC
62.4.112.0/2062.4.112.0 - 62.4.127.2552001/06/11RIPE NCC
62.24.64.0/1962.24.64.0 - 62.24.95.2552000/06/14RIPE NCC
62.40.64.0/1962.40.64.0 - 62.40.95.2552000/06/14RIPE NCC
62.44.0.0/1962.44.0.0 - 62.44.31.2551997/05/23RIPE NCC
62.68.94.0/2462.68.94.0 - 62.68.94.2552022/01/25RIPE NCC
62.76.224.0/2062.76.224.0 - 62.76.239.2551997/06/16RIPE NCC
62.77.64.0/1862.77.64.0 - 62.77.127.2552001/07/05RIPE NCC
62.84.128.0/1962.84.128.0 - 62.84.159.2552000/06/23RIPE NCC
62.106.79.0/2462.106.79.0 - 62.106.79.2552021/10/07RIPE NCC
62.109.128.0/1962.109.128.0 - 62.109.159.2552008/07/03RIPE NCC
62.129.32.0/1962.129.32.0 - 62.129.63.2552003/01/24RIPE NCC
62.141.0.0/1962.141.0.0 - 62.141.31.2552000/07/12RIPE NCC
62.168.0.0/1862.168.0.0 - 62.168.63.2551997/05/07RIPE NCC
62.177.64.0/1862.177.64.0 - 62.177.127.2552001/10/15RIPE NCC
62.182.232.0/2162.182.232.0 - 62.182.239.2552008/05/02RIPE NCC
62.201.16.0/2062.201.16.0 - 62.201.31.2552010/02/08RIPE NCC
62.204.53.0/2462.204.53.0 - 62.204.53.2552021/10/11RIPE NCC
62.204.224.0/1962.204.224.0 - 62.204.255.2552003/05/09RIPE NCC
62.209.192.0/1862.209.192.0 - 62.209.255.2552003/01/30RIPE NCC
62.240.160.0/1962.240.160.0 - 62.240.191.2552003/05/26RIPE NCC
62.245.64.0/1862.245.64.0 - 62.245.127.2552002/01/03RIPE NCC
69.94.64.0/2069.94.64.0 - 69.94.79.2552003/11/19RIPE NCC
77.48.0.0/1677.48.0.0 - 77.48.255.2552006/11/23RIPE NCC
77.75.72.0/2177.75.72.0 - 77.75.79.2552007/05/07RIPE NCC
77.78.64.0/2277.78.64.0 - 77.78.67.2552007/02/27RIPE NCC
77.78.68.0/2377.78.68.0 - 77.78.69.2552007/02/27RIPE NCC
77.78.74.0/2377.78.74.0 - 77.78.75.2552007/02/27RIPE NCC
77.78.76.0/2277.78.76.0 - 77.78.79.2552007/02/27RIPE NCC
77.78.80.0/2177.78.80.0 - 77.78.87.2552007/02/27RIPE NCC
77.78.88.0/2277.78.88.0 - 77.78.91.2552007/02/27RIPE NCC
77.78.92.0/2377.78.92.0 - 77.78.93.2552007/02/27RIPE NCC
77.78.94.0/2377.78.94.0 - 77.78.95.2552007/02/27RIPE NCC
77.78.96.0/2077.78.96.0 - 77.78.111.2552007/02/27RIPE NCC
77.78.112.0/2177.78.112.0 - 77.78.119.2552007/02/27RIPE NCC
77.78.122.0/2477.78.122.0 - 77.78.122.2552007/02/27RIPE NCC
77.78.123.0/2477.78.123.0 - 77.78.123.2552007/02/27RIPE NCC
77.78.124.0/2277.78.124.0 - 77.78.127.2552007/02/27RIPE NCC
77.87.232.0/2177.87.232.0 - 77.87.239.2552007/08/16RIPE NCC
77.87.240.0/2177.87.240.0 - 77.87.247.2552010/07/13RIPE NCC
77.92.192.0/1977.92.192.0 - 77.92.223.2552007/05/09RIPE NCC
77.93.192.0/1977.93.192.0 - 77.93.223.2552007/05/18RIPE NCC
77.95.40.0/2177.95.40.0 - 77.95.47.2552007/05/29RIPE NCC
77.95.192.0/2177.95.192.0 - 77.95.199.2552007/06/13RIPE NCC
77.104.192.0/1877.104.192.0 - 77.104.255.2552006/11/28RIPE NCC
77.223.216.0/2177.223.216.0 - 77.223.223.2552007/04/26RIPE NCC
77.234.40.0/2177.234.40.0 - 77.234.47.2552012/03/21RIPE NCC
77.236.192.0/1977.236.192.0 - 77.236.223.2552007/01/30RIPE NCC
77.237.128.0/1977.237.128.0 - 77.237.159.2552007/02/02RIPE NCC
77.240.96.0/2077.240.96.0 - 77.240.111.2552007/01/10RIPE NCC
77.240.176.0/2077.240.176.0 - 77.240.191.2552007/01/18RIPE NCC
77.242.80.0/2077.242.80.0 - 77.242.95.2552007/02/27RIPE NCC
78.24.8.0/2178.24.8.0 - 78.24.15.2552007/08/17RIPE NCC
78.24.96.0/2278.24.96.0 - 78.24.99.2552018/06/18RIPE NCC
78.24.232.0/2178.24.232.0 - 78.24.239.2552007/09/14RIPE NCC
78.31.24.0/2178.31.24.0 - 78.31.31.2552007/09/20RIPE NCC
78.41.8.0/2178.41.8.0 - 78.41.15.2552007/07/26RIPE NCC
78.41.16.0/2178.41.16.0 - 78.41.23.2552007/07/27RIPE NCC
78.44.0.0/1578.44.0.0 - 78.45.255.2552007/04/13RIPE NCC
78.80.0.0/1778.80.0.0 - 78.80.127.2552007/03/22RIPE NCC
78.80.128.0/1778.80.128.0 - 78.80.255.2552007/03/22RIPE NCC
78.102.0.0/1678.102.0.0 - 78.102.255.2552007/06/04RIPE NCC
78.108.96.0/2078.108.96.0 - 78.108.111.2552007/06/18RIPE NCC
78.108.144.0/2178.108.144.0 - 78.108.151.2552007/06/22RIPE NCC
78.108.152.0/2178.108.152.0 - 78.108.159.2552007/06/22RIPE NCC
78.110.208.0/2078.110.208.0 - 78.110.223.2552007/08/20RIPE NCC
78.111.112.0/2078.111.112.0 - 78.111.127.2552009/06/29RIPE NCC
78.128.128.0/1778.128.128.0 - 78.128.255.2552007/04/10RIPE NCC
78.136.128.0/1878.136.128.0 - 78.136.191.2552007/05/09RIPE NCC
78.138.62.0/2478.138.62.0 - 78.138.62.2552007/06/07RIPE NCC
78.156.32.0/1978.156.32.0 - 78.156.63.2552007/08/09RIPE NCC
78.156.128.0/1978.156.128.0 - 78.156.159.2552007/08/16RIPE NCC
78.157.128.0/1978.157.128.0 - 78.157.159.2552010/06/04RIPE NCC
78.157.160.0/1978.157.160.0 - 78.157.191.2552007/08/30RIPE NCC
79.98.72.0/2179.98.72.0 - 79.98.79.2552007/10/29RIPE NCC
79.98.152.0/2179.98.152.0 - 79.98.159.2552007/11/06RIPE NCC
79.110.32.0/2079.110.32.0 - 79.110.47.2552011/09/13RIPE NCC
79.110.225.0/2479.110.225.0 - 79.110.225.2552021/09/23RIPE NCC
79.127.128.0/1879.127.128.0 - 79.127.191.2552007/09/25RIPE NCC
79.133.178.0/2379.133.178.0 - 79.133.179.2552007/10/12RIPE NCC
79.141.240.0/2079.141.240.0 - 79.141.255.2552007/10/26RIPE NCC
79.142.144.0/2079.142.144.0 - 79.142.159.2552010/10/08RIPE NCC
79.170.248.0/2179.170.248.0 - 79.170.255.2552007/10/05RIPE NCC
79.171.184.0/2179.171.184.0 - 79.171.191.2552007/10/17RIPE NCC
80.65.176.0/2080.65.176.0 - 80.65.191.2552004/04/19RIPE NCC
80.74.32.0/2080.74.32.0 - 80.74.47.2552001/06/18RIPE NCC
80.78.136.0/2280.78.136.0 - 80.78.139.2552018/08/14RIPE NCC
80.78.144.0/2080.78.144.0 - 80.78.159.2552005/03/16RIPE NCC
80.79.0.0/2280.79.0.0 - 80.79.3.2552018/08/14RIPE NCC
80.79.16.0/2080.79.16.0 - 80.79.31.2552005/03/16RIPE NCC
80.82.144.0/2080.82.144.0 - 80.82.159.2552005/04/11RIPE NCC
80.82.192.0/2180.82.192.0 - 80.82.199.2552012/06/07RIPE NCC
80.83.64.0/2080.83.64.0 - 80.83.79.2552001/07/30RIPE NCC
80.87.176.0/2080.87.176.0 - 80.87.191.2552005/05/20RIPE NCC
80.90.128.0/2080.90.128.0 - 80.90.143.2552008/10/07RIPE NCC
80.91.220.0/2480.91.220.0 - 80.91.220.2552022/01/25RIPE NCC
80.92.240.0/2080.92.240.0 - 80.92.255.2552010/04/20RIPE NCC
80.95.96.0/2080.95.96.0 - 80.95.111.2552001/10/05RIPE NCC
80.95.112.0/2080.95.112.0 - 80.95.127.2552002/08/29RIPE NCC
80.95.240.0/2080.95.240.0 - 80.95.255.2552005/08/12RIPE NCC
80.188.0.0/1680.188.0.0 - 80.188.255.2552002/06/13RIPE NCC
80.243.96.0/2080.243.96.0 - 80.243.111.2552009/05/27RIPE NCC
80.243.236.0/2280.243.236.0 - 80.243.239.2552018/08/14RIPE NCC
80.249.133.0/2480.249.133.0 - 80.249.133.2552020/10/22RIPE NCC
80.250.0.0/2080.250.0.0 - 80.250.15.2552001/11/29RIPE NCC
80.250.16.0/2080.250.16.0 - 80.250.31.2552005/06/27RIPE NCC
80.251.240.0/2080.251.240.0 - 80.251.255.2552005/11/21RIPE NCC
80.254.232.0/2280.254.232.0 - 80.254.235.2552018/08/15RIPE NCC
80.254.236.0/2280.254.236.0 - 80.254.239.2552018/08/15RIPE NCC
81.0.192.0/2281.0.192.0 - 81.0.195.2552001/12/14RIPE NCC
81.0.196.0/2381.0.196.0 - 81.0.197.2552001/12/14RIPE NCC
81.0.198.0/2481.0.198.0 - 81.0.198.2552001/12/14RIPE NCC
81.0.199.0/2481.0.199.0 - 81.0.199.2552001/12/14RIPE NCC
81.0.200.0/2281.0.200.0 - 81.0.203.2552001/12/14RIPE NCC
81.0.204.0/2381.0.204.0 - 81.0.205.2552001/12/14RIPE NCC
81.0.206.0/2381.0.206.0 - 81.0.207.2552001/12/14RIPE NCC
81.0.208.0/2381.0.208.0 - 81.0.209.2552001/12/14RIPE NCC
81.0.210.0/2381.0.210.0 - 81.0.211.2552001/12/14RIPE NCC
81.0.212.0/2381.0.212.0 - 81.0.213.2552001/12/14RIPE NCC
81.0.214.0/2481.0.214.0 - 81.0.214.2552001/12/14RIPE NCC
81.0.215.0/2481.0.215.0 - 81.0.215.2552001/12/14RIPE NCC
81.0.216.0/2481.0.216.0 - 81.0.216.2552001/12/14RIPE NCC
81.0.217.0/2481.0.217.0 - 81.0.217.2552001/12/14RIPE NCC
81.0.222.0/2381.0.222.0 - 81.0.223.2552001/12/14RIPE NCC
81.0.224.0/2481.0.224.0 - 81.0.224.2552001/12/14RIPE NCC
81.0.225.0/2481.0.225.0 - 81.0.225.2552001/12/14RIPE NCC
81.0.226.0/2481.0.226.0 - 81.0.226.2552001/12/14RIPE NCC
81.0.227.0/2481.0.227.0 - 81.0.227.2552001/12/14RIPE NCC
81.0.228.0/2481.0.228.0 - 81.0.228.2552001/12/14RIPE NCC
81.0.229.0/2481.0.229.0 - 81.0.229.2552001/12/14RIPE NCC
81.0.230.0/2381.0.230.0 - 81.0.231.2552001/12/14RIPE NCC
81.0.232.0/2181.0.232.0 - 81.0.239.2552001/12/14RIPE NCC
81.0.240.0/2281.0.240.0 - 81.0.243.2552001/12/14RIPE NCC
81.0.244.0/2381.0.244.0 - 81.0.245.2552001/12/14RIPE NCC
81.0.250.0/2481.0.250.0 - 81.0.250.2552001/12/14RIPE NCC
81.0.251.0/2481.0.251.0 - 81.0.251.2552001/12/14RIPE NCC
81.0.252.0/2381.0.252.0 - 81.0.253.2552001/12/14RIPE NCC
81.0.254.0/2381.0.254.0 - 81.0.255.2552001/12/14RIPE NCC
81.2.192.0/1881.2.192.0 - 81.2.255.2552002/04/04RIPE NCC
81.19.0.0/2081.19.0.0 - 81.19.15.2552002/01/22RIPE NCC
81.19.32.0/2081.19.32.0 - 81.19.47.2552002/12/10RIPE NCC
81.22.236.0/2281.22.236.0 - 81.22.239.2552018/09/11RIPE NCC
81.25.16.0/2081.25.16.0 - 81.25.31.2552006/02/27RIPE NCC
81.27.192.0/2081.27.192.0 - 81.27.207.2552002/04/15RIPE NCC
81.28.16.0/2081.28.16.0 - 81.28.31.2552006/03/16RIPE NCC
81.30.224.0/1981.30.224.0 - 81.30.255.2552002/05/27RIPE NCC
81.31.32.0/2081.31.32.0 - 81.31.47.2552002/05/28RIPE NCC
81.90.160.0/2081.90.160.0 - 81.90.175.2552002/07/04RIPE NCC
81.90.240.0/2081.90.240.0 - 81.90.255.2552006/04/21RIPE NCC
81.91.80.0/2081.91.80.0 - 81.91.95.2552006/04/25RIPE NCC
81.91.208.0/2081.91.208.0 - 81.91.223.2552006/04/27RIPE NCC
81.92.144.0/2081.92.144.0 - 81.92.159.2552006/05/03RIPE NCC
81.95.96.0/2081.95.96.0 - 81.95.111.2552002/09/03RIPE NCC
81.161.64.0/2081.161.64.0 - 81.161.79.2552012/07/16RIPE NCC
81.162.192.0/2081.162.192.0 - 81.162.207.2552011/12/07RIPE NCC
81.200.48.0/2081.200.48.0 - 81.200.63.2552006/06/01RIPE NCC
81.201.48.0/2081.201.48.0 - 81.201.63.2552006/06/20RIPE NCC
82.99.128.0/1882.99.128.0 - 82.99.191.2552003/12/12RIPE NCC
82.100.0.0/1882.100.0.0 - 82.100.63.2552003/12/12RIPE NCC
82.113.32.0/1982.113.32.0 - 82.113.63.2552003/12/11RIPE NCC
82.114.192.0/1982.114.192.0 - 82.114.223.2552004/01/02RIPE NCC
82.117.128.0/1982.117.128.0 - 82.117.159.2552004/02/09RIPE NCC
82.119.240.0/2082.119.240.0 - 82.119.255.2552004/02/18RIPE NCC
82.142.64.0/1882.142.64.0 - 82.142.127.2552003/09/05RIPE NCC
82.144.128.0/1982.144.128.0 - 82.144.159.2552009/04/14RIPE NCC
82.150.160.0/1982.150.160.0 - 82.150.191.2552003/08/25RIPE NCC
82.202.0.0/1882.202.0.0 - 82.202.63.2552003/09/23RIPE NCC
82.202.64.0/1882.202.64.0 - 82.202.127.2552003/09/23RIPE NCC
82.208.0.0/2282.208.0.0 - 82.208.3.2552003/09/16RIPE NCC
82.208.4.0/2282.208.4.0 - 82.208.7.2552003/09/16RIPE NCC
82.208.8.0/2282.208.8.0 - 82.208.11.2552003/09/16RIPE NCC
82.208.12.0/2482.208.12.0 - 82.208.12.2552003/09/16RIPE NCC
82.208.13.0/2482.208.13.0 - 82.208.13.2552003/09/16RIPE NCC
82.208.14.0/2482.208.14.0 - 82.208.14.2552003/09/16RIPE NCC
82.208.15.0/2482.208.15.0 - 82.208.15.2552003/09/16RIPE NCC
82.208.16.0/2382.208.16.0 - 82.208.17.2552003/09/16RIPE NCC
82.208.18.0/2482.208.18.0 - 82.208.18.2552003/09/16RIPE NCC
82.208.19.0/2482.208.19.0 - 82.208.19.2552003/09/16RIPE NCC
82.208.24.0/2382.208.24.0 - 82.208.25.2552003/09/16RIPE NCC
82.208.26.0/2382.208.26.0 - 82.208.27.2552003/09/16RIPE NCC
82.208.28.0/2382.208.28.0 - 82.208.29.2552003/09/16RIPE NCC
82.208.30.0/2382.208.30.0 - 82.208.31.2552003/09/16RIPE NCC
82.208.32.0/2282.208.32.0 - 82.208.35.2552003/09/16RIPE NCC
82.208.36.0/2382.208.36.0 - 82.208.37.2552003/09/16RIPE NCC
82.208.38.0/2482.208.38.0 - 82.208.38.2552003/09/16RIPE NCC
82.208.39.0/2482.208.39.0 - 82.208.39.2552003/09/16RIPE NCC
82.208.40.0/2382.208.40.0 - 82.208.41.2552003/09/16RIPE NCC
82.208.42.0/2382.208.42.0 - 82.208.43.2552003/09/16RIPE NCC
82.208.44.0/2482.208.44.0 - 82.208.44.2552003/09/16RIPE NCC
82.208.45.0/2482.208.45.0 - 82.208.45.2552003/09/16RIPE NCC
82.208.46.0/2382.208.46.0 - 82.208.47.2552003/09/16RIPE NCC
82.208.48.0/2382.208.48.0 - 82.208.49.2552003/09/16RIPE NCC
82.208.50.0/2482.208.50.0 - 82.208.50.2552003/09/16RIPE NCC
82.208.51.0/2482.208.51.0 - 82.208.51.2552003/09/16RIPE NCC
82.208.52.0/2282.208.52.0 - 82.208.55.2552003/09/16RIPE NCC
82.208.56.0/2482.208.56.0 - 82.208.56.2552003/09/16RIPE NCC
Merged CIDR

連続した割り振りブロックを統合したリストです。

401-600 of 1530 rows
CIDR
89.250.240.0/20
90.176.32.0/19
90.176.64.0/18
90.176.128.0/17
90.177.0.0/16
90.178.0.0/15
90.180.0.0/14
91.103.160.0/21
91.106.240.0/20
91.108.185.0/24
91.109.32.0/21
91.132.204.0/22
91.132.232.0/22
91.139.0.0/17
91.146.120.0/21
91.187.32.0/19
91.192.32.0/22
91.193.132.0/22
91.195.106.0/23
91.195.202.0/23
91.196.40.0/22
91.197.112.0/21
91.199.164.0/24
91.199.207.0/24
91.201.20.0/22
91.201.32.0/22
91.201.92.0/22
91.202.52.0/22
91.204.83.0/24
91.205.40.0/24
91.205.92.0/22
91.205.195.0/24
91.206.91.0/24
91.207.188.0/23
91.207.230.0/23
91.207.234.0/23
91.208.112.0/24
91.209.101.0/24
91.210.16.0/22
91.213.10.0/24
91.213.122.0/24
91.213.143.0/24
91.213.160.0/24
91.214.156.0/22
91.214.192.0/22
91.215.12.0/22
91.216.168.0/24
91.216.179.0/24
91.217.52.0/23
91.217.96.0/23
91.218.188.0/22
91.218.232.0/22
91.219.44.0/22
91.219.240.0/21
91.220.122.0/24
91.220.201.0/24
91.221.2.0/23
91.221.46.0/23
91.221.148.0/23
91.221.212.0/23
91.222.52.0/22
91.223.74.0/24
91.224.48.0/23
91.224.58.0/23
91.224.64.0/23
91.224.90.0/23
91.224.100.0/23
91.225.84.0/22
91.225.128.0/22
91.226.124.0/22
91.226.216.0/22
91.227.7.0/24
91.227.96.0/23
91.227.134.0/23
91.227.232.0/22
91.228.44.0/22
91.228.100.0/24
91.228.187.0/24
91.228.200.0/22
91.229.252.0/22
91.230.94.0/23
91.230.144.0/24
91.230.247.0/24
91.231.28.0/22
91.231.171.0/24
91.231.188.0/22
91.232.82.0/24
91.232.84.0/22
91.232.212.0/22
91.232.247.0/24
91.233.208.0/22
91.234.162.0/23
91.234.248.0/22
91.235.183.0/24
91.235.200.0/23
91.236.40.0/22
91.237.87.0/24
91.237.236.0/22
91.239.187.0/24
91.239.200.0/22
91.239.236.0/23
91.240.35.0/24
91.240.46.0/24
91.241.8.0/22
91.241.23.0/24
91.241.168.0/21
91.245.0.0/19
92.38.0.0/17
92.43.24.0/21
92.43.56.0/21
92.61.80.0/20
92.62.124.0/22
92.62.224.0/20
92.63.48.0/20
92.119.64.0/22
92.119.116.0/22
92.240.160.0/19
92.243.192.0/19
92.253.128.0/17
93.89.96.0/20
93.89.144.0/20
93.90.160.0/20
93.91.48.0/20
93.91.144.0/20
93.91.240.0/20
93.92.48.0/21
93.93.32.0/21
93.95.32.0/21
93.99.0.0/16
93.153.0.0/17
93.157.128.0/21
93.170.0.0/15
93.181.64.0/18
93.183.100.0/22
93.183.120.0/22
93.185.0.0/20
93.185.48.0/20
93.185.96.0/20
93.187.104.0/22
93.187.108.0/23
93.190.48.0/20
93.190.128.0/21
94.74.192.0/18
94.112.0.0/15
94.124.40.0/21
94.124.104.0/21
94.124.184.0/21
94.124.248.0/21
94.125.216.0/21
94.127.128.0/21
94.138.96.0/19
94.140.25.0/24
94.142.232.0/21
94.143.168.0/21
94.143.232.0/21
94.199.40.0/21
94.199.96.0/22
94.199.192.0/21
94.229.80.0/20
94.230.144.0/20
94.241.64.0/18
94.242.64.0/18
94.247.32.0/21
95.46.0.0/15
95.80.192.0/18
95.82.128.0/18
95.85.192.0/18
95.129.96.0/21
95.129.240.0/21
95.140.240.0/20
95.143.128.0/20
95.168.192.0/19
95.173.64.0/19
95.173.194.0/23
95.173.196.0/24
95.173.198.0/24
95.173.200.0/22
95.173.208.0/21
95.182.64.0/18
95.215.8.0/24
95.215.80.0/22
104.254.80.0/21
109.69.208.0/21
109.71.208.0/21
109.72.0.0/20
109.73.208.0/20
109.75.0.0/20
109.75.144.0/20
109.80.0.0/15
109.105.32.0/19
109.107.158.0/24
109.107.192.0/19
109.108.96.0/19
109.123.192.0/19
109.123.226.0/24
109.164.0.0/17
109.183.0.0/16
109.202.64.0/19
109.205.72.0/21
109.224.64.0/18