fetus

🇨🇭スイスSwitzerland


割り振り一覧

スイスに割り振りされた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。

スイスには25,337,912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0.58994%、予約領域を除くと0.68439%です。


401-600 of 2910 rows
CIDRIPアドレス割り振り日レジストリ
88.151.144.0/2188.151.144.0 - 88.151.151.2552010/03/01RIPE NCC
88.213.128.0/1888.213.128.0 - 88.213.191.2552006/01/04RIPE NCC
88.214.4.0/2288.214.4.0 - 88.214.7.2552018/11/19RIPE NCC
88.218.24.0/2288.218.24.0 - 88.218.27.2552018/12/14RIPE NCC
89.28.152.0/2189.28.152.0 - 89.28.159.2552012/09/10RIPE NCC
89.35.39.0/2489.35.39.0 - 89.35.39.2552005/11/29RIPE NCC
89.35.78.0/2389.35.78.0 - 89.35.79.2552005/11/29RIPE NCC
89.35.226.0/2489.35.226.0 - 89.35.226.2552005/11/29RIPE NCC
89.36.170.0/2389.36.170.0 - 89.36.171.2552005/11/29RIPE NCC
89.43.116.0/2289.43.116.0 - 89.43.119.2552005/11/29RIPE NCC
89.45.84.0/2289.45.84.0 - 89.45.87.2552005/11/29RIPE NCC
89.46.116.0/2289.46.116.0 - 89.46.119.2552005/11/29RIPE NCC
89.47.48.0/2289.47.48.0 - 89.47.51.2552005/11/29RIPE NCC
89.106.201.0/2489.106.201.0 - 89.106.201.2552022/01/25RIPE NCC
89.145.160.0/2189.145.160.0 - 89.145.167.2552011/09/12RIPE NCC
89.145.176.0/2189.145.176.0 - 89.145.183.2552011/09/13RIPE NCC
89.150.55.0/2489.150.55.0 - 89.150.55.2552010/03/10RIPE NCC
89.186.192.0/2189.186.192.0 - 89.186.199.2552012/09/10RIPE NCC
89.186.208.0/2189.186.208.0 - 89.186.215.2552012/09/11RIPE NCC
89.190.144.0/2289.190.144.0 - 89.190.147.2552018/10/10RIPE NCC
89.200.220.0/2289.200.220.0 - 89.200.223.2552018/07/26RIPE NCC
89.206.64.0/1889.206.64.0 - 89.206.127.2552007/09/06RIPE NCC
89.207.8.0/2289.207.8.0 - 89.207.11.2552018/06/22RIPE NCC
89.207.224.0/2189.207.224.0 - 89.207.231.2552006/07/12RIPE NCC
89.207.232.0/2189.207.232.0 - 89.207.239.2552006/07/14RIPE NCC
89.217.0.0/1689.217.0.0 - 89.217.255.2552006/06/26RIPE NCC
89.236.128.0/1889.236.128.0 - 89.236.191.2552006/06/15RIPE NCC
89.248.32.0/2089.248.32.0 - 89.248.47.2552006/06/27RIPE NCC
89.249.32.0/2189.249.32.0 - 89.249.39.2552006/07/18RIPE NCC
89.249.40.0/2289.249.40.0 - 89.249.43.2552006/07/18RIPE NCC
89.249.44.0/2289.249.44.0 - 89.249.47.2552006/07/18RIPE NCC
89.251.240.0/2089.251.240.0 - 89.251.255.2552006/09/20RIPE NCC
89.255.192.0/2189.255.192.0 - 89.255.199.2552006/09/18RIPE NCC
91.84.64.0/1991.84.64.0 - 91.84.95.2552006/07/31RIPE NCC
91.90.166.0/2491.90.166.0 - 91.90.166.2552006/09/19RIPE NCC
91.92.71.0/2491.92.71.0 - 91.92.71.2552006/08/15RIPE NCC
91.92.116.0/2291.92.116.0 - 91.92.119.2552006/08/15RIPE NCC
91.92.140.0/2291.92.140.0 - 91.92.143.2552006/08/15RIPE NCC
91.92.152.0/2291.92.152.0 - 91.92.155.2552006/08/15RIPE NCC
91.92.200.0/2291.92.200.0 - 91.92.203.2552006/08/15RIPE NCC
91.92.224.0/2291.92.224.0 - 91.92.227.2552006/08/15RIPE NCC
91.102.192.0/2191.102.192.0 - 91.102.199.2552012/08/30RIPE NCC
91.103.64.0/2191.103.64.0 - 91.103.71.2552006/11/23RIPE NCC
91.108.184.0/2491.108.184.0 - 91.108.184.2552024/01/12RIPE NCC
91.123.96.0/2091.123.96.0 - 91.123.111.2552007/02/12RIPE NCC
91.132.180.0/2291.132.180.0 - 91.132.183.2552018/12/20RIPE NCC
91.132.236.0/2291.132.236.0 - 91.132.239.2552018/12/21RIPE NCC
91.135.64.0/2091.135.64.0 - 91.135.79.2552006/11/14RIPE NCC
91.138.0.0/1891.138.0.0 - 91.138.63.2552006/10/11RIPE NCC
91.138.64.0/1891.138.64.0 - 91.138.127.2552006/10/11RIPE NCC
91.189.8.0/2191.189.8.0 - 91.189.15.2552006/12/14RIPE NCC
91.190.0.0/1991.190.0.0 - 91.190.31.2552006/11/27RIPE NCC
91.192.100.0/2291.192.100.0 - 91.192.103.2552007/02/15RIPE NCC
91.193.20.0/2291.193.20.0 - 91.193.23.2552007/03/23RIPE NCC
91.193.52.0/2491.193.52.0 - 91.193.52.2552023/05/31RIPE NCC
91.193.90.0/2491.193.90.0 - 91.193.90.2552023/08/07RIPE NCC
91.194.48.0/2391.194.48.0 - 91.194.49.2552007/05/29RIPE NCC
91.194.111.0/2491.194.111.0 - 91.194.111.2552020/02/26RIPE NCC
91.194.139.0/2491.194.139.0 - 91.194.139.2552007/06/19RIPE NCC
91.194.146.0/2391.194.146.0 - 91.194.147.2552007/06/20RIPE NCC
91.194.196.0/2391.194.196.0 - 91.194.197.2552007/07/09RIPE NCC
91.195.18.0/2391.195.18.0 - 91.195.19.2552007/08/08RIPE NCC
91.195.142.0/2391.195.142.0 - 91.195.143.2552007/09/19RIPE NCC
91.195.188.0/2391.195.188.0 - 91.195.189.2552007/10/04RIPE NCC
91.195.238.0/2391.195.238.0 - 91.195.239.2552007/10/23RIPE NCC
91.198.6.0/2491.198.6.0 - 91.198.6.2552007/06/20RIPE NCC
91.198.8.0/2491.198.8.0 - 91.198.8.2552007/06/20RIPE NCC
91.198.11.0/2491.198.11.0 - 91.198.11.2552007/06/21RIPE NCC
91.198.12.0/2491.198.12.0 - 91.198.12.2552007/06/22RIPE NCC
91.198.58.0/2491.198.58.0 - 91.198.58.2552007/08/27RIPE NCC
91.198.72.0/2491.198.72.0 - 91.198.72.2552007/08/29RIPE NCC
91.198.73.0/2491.198.73.0 - 91.198.73.2552007/08/29RIPE NCC
91.198.79.0/2491.198.79.0 - 91.198.79.2552007/08/31RIPE NCC
91.198.154.0/2491.198.154.0 - 91.198.154.2552007/09/26RIPE NCC
91.198.173.0/2491.198.173.0 - 91.198.173.2552007/10/02RIPE NCC
91.198.229.0/2491.198.229.0 - 91.198.229.2552007/10/26RIPE NCC
91.199.66.0/2491.199.66.0 - 91.199.66.2552007/12/06RIPE NCC
91.199.76.0/2491.199.76.0 - 91.199.76.2552007/12/20RIPE NCC
91.199.85.0/2491.199.85.0 - 91.199.85.2552007/12/21RIPE NCC
91.199.98.0/2491.199.98.0 - 91.199.98.2552008/01/07RIPE NCC
91.199.126.0/2491.199.126.0 - 91.199.126.2552008/01/21RIPE NCC
91.199.186.0/2491.199.186.0 - 91.199.186.2552008/02/11RIPE NCC
91.199.198.0/2491.199.198.0 - 91.199.198.2552008/02/19RIPE NCC
91.199.218.0/2491.199.218.0 - 91.199.218.2552008/02/27RIPE NCC
91.199.228.0/2491.199.228.0 - 91.199.228.2552008/03/04RIPE NCC
91.200.144.0/2491.200.144.0 - 91.200.144.2552022/02/14RIPE NCC
91.201.56.0/2291.201.56.0 - 91.201.59.2552007/11/21RIPE NCC
91.201.148.0/2291.201.148.0 - 91.201.151.2552007/12/17RIPE NCC
91.201.212.0/2391.201.212.0 - 91.201.213.2552012/08/13RIPE NCC
91.202.120.0/2291.202.120.0 - 91.202.123.2552008/02/15RIPE NCC
91.203.31.0/2491.203.31.0 - 91.203.31.2552008/03/18RIPE NCC
91.204.24.0/2291.204.24.0 - 91.204.27.2552008/05/26RIPE NCC
91.205.148.0/2291.205.148.0 - 91.205.151.2552008/09/15RIPE NCC
91.206.11.0/2491.206.11.0 - 91.206.11.2552020/03/24RIPE NCC
91.206.24.0/2391.206.24.0 - 91.206.25.2552008/06/10RIPE NCC
91.206.52.0/2391.206.52.0 - 91.206.53.2552008/06/17RIPE NCC
91.206.104.0/2391.206.104.0 - 91.206.105.2552008/07/09RIPE NCC
91.206.176.0/2491.206.176.0 - 91.206.176.2552024/01/15RIPE NCC
91.207.164.0/2391.207.164.0 - 91.207.165.2552019/10/03RIPE NCC
91.207.178.0/2391.207.178.0 - 91.207.179.2552019/10/03RIPE NCC
91.207.207.0/2491.207.207.0 - 91.207.207.2552022/09/12RIPE NCC
91.208.30.0/2491.208.30.0 - 91.208.30.2552008/07/07RIPE NCC
91.208.79.0/2491.208.79.0 - 91.208.79.2552008/07/25RIPE NCC
91.208.82.0/2491.208.82.0 - 91.208.82.2552008/07/28RIPE NCC
91.208.130.0/2491.208.130.0 - 91.208.130.2552008/08/12RIPE NCC
91.208.131.0/2491.208.131.0 - 91.208.131.2552008/08/13RIPE NCC
91.208.173.0/2491.208.173.0 - 91.208.173.2552008/08/28RIPE NCC
91.208.180.0/2491.208.180.0 - 91.208.180.2552008/09/01RIPE NCC
91.208.227.0/2491.208.227.0 - 91.208.227.2552008/09/24RIPE NCC
91.209.3.0/2491.209.3.0 - 91.209.3.2552008/10/07RIPE NCC
91.209.28.0/2491.209.28.0 - 91.209.28.2552008/10/15RIPE NCC
91.209.41.0/2491.209.41.0 - 91.209.41.2552008/10/20RIPE NCC
91.209.53.0/2491.209.53.0 - 91.209.53.2552008/10/22RIPE NCC
91.209.84.0/2491.209.84.0 - 91.209.84.2552008/11/04RIPE NCC
91.209.98.0/2491.209.98.0 - 91.209.98.2552008/11/07RIPE NCC
91.209.111.0/2491.209.111.0 - 91.209.111.2552008/11/13RIPE NCC
91.209.134.0/2491.209.134.0 - 91.209.134.2552008/11/19RIPE NCC
91.209.158.0/2491.209.158.0 - 91.209.158.2552008/11/25RIPE NCC
91.209.169.0/2491.209.169.0 - 91.209.169.2552008/12/02RIPE NCC
91.209.170.0/2491.209.170.0 - 91.209.170.2552008/12/02RIPE NCC
91.209.204.0/2491.209.204.0 - 91.209.204.2552008/12/16RIPE NCC
91.210.70.0/2491.210.70.0 - 91.210.70.2552022/07/04RIPE NCC
91.211.1.0/2491.211.1.0 - 91.211.1.2552020/06/30RIPE NCC
91.212.29.0/2491.212.29.0 - 91.212.29.2552009/02/02RIPE NCC
91.212.43.0/2491.212.43.0 - 91.212.43.2552009/02/09RIPE NCC
91.212.75.0/2491.212.75.0 - 91.212.75.2552009/02/18RIPE NCC
91.212.77.0/2491.212.77.0 - 91.212.77.2552009/02/18RIPE NCC
91.212.91.0/2491.212.91.0 - 91.212.91.2552009/03/16RIPE NCC
91.212.109.0/2491.212.109.0 - 91.212.109.2552009/03/31RIPE NCC
91.212.117.0/2491.212.117.0 - 91.212.117.2552009/04/06RIPE NCC
91.212.196.0/2491.212.196.0 - 91.212.196.2552009/05/08RIPE NCC
91.212.200.0/2491.212.200.0 - 91.212.200.2552009/05/12RIPE NCC
91.212.234.0/2491.212.234.0 - 91.212.234.2552009/06/03RIPE NCC
91.213.2.0/2491.213.2.0 - 91.213.2.2552009/06/10RIPE NCC
91.213.4.0/2491.213.4.0 - 91.213.4.2552009/06/10RIPE NCC
91.213.19.0/2491.213.19.0 - 91.213.19.2552009/06/18RIPE NCC
91.213.24.0/2491.213.24.0 - 91.213.24.2552009/06/19RIPE NCC
91.213.32.0/2491.213.32.0 - 91.213.32.2552009/06/23RIPE NCC
91.213.100.0/2491.213.100.0 - 91.213.100.2552009/07/29RIPE NCC
91.213.128.0/2491.213.128.0 - 91.213.128.2552009/08/06RIPE NCC
91.213.133.0/2491.213.133.0 - 91.213.133.2552009/08/07RIPE NCC
91.213.136.0/2491.213.136.0 - 91.213.136.2552010/07/05RIPE NCC
91.213.159.0/2491.213.159.0 - 91.213.159.2552009/08/17RIPE NCC
91.213.171.0/2491.213.171.0 - 91.213.171.2552009/08/19RIPE NCC
91.213.194.0/2491.213.194.0 - 91.213.194.2552009/08/27RIPE NCC
91.213.202.0/2491.213.202.0 - 91.213.202.2552021/07/01RIPE NCC
91.213.227.0/2491.213.227.0 - 91.213.227.2552009/09/17RIPE NCC
91.214.168.0/2291.214.168.0 - 91.214.171.2552009/06/10RIPE NCC
91.214.188.0/2291.214.188.0 - 91.214.191.2552009/06/19RIPE NCC
91.216.36.0/2491.216.36.0 - 91.216.36.2552010/04/22RIPE NCC
91.216.40.0/2491.216.40.0 - 91.216.40.2552021/09/06RIPE NCC
91.216.83.0/2491.216.83.0 - 91.216.83.2552010/05/12RIPE NCC
91.216.84.0/2391.216.84.0 - 91.216.85.2552010/05/12RIPE NCC
91.216.229.0/2491.216.229.0 - 91.216.229.2552010/06/30RIPE NCC
91.217.128.0/2491.217.128.0 - 91.217.128.2552010/08/12RIPE NCC
91.217.151.0/2491.217.151.0 - 91.217.151.2552022/08/23RIPE NCC
91.217.170.0/2491.217.170.0 - 91.217.170.2552010/08/27RIPE NCC
91.217.247.0/2491.217.247.0 - 91.217.247.2552010/09/24RIPE NCC
91.218.38.0/2491.218.38.0 - 91.218.38.2552020/06/02RIPE NCC
91.218.175.0/2491.218.175.0 - 91.218.175.2552010/07/28RIPE NCC
91.220.23.0/2491.220.23.0 - 91.220.23.2552010/10/13RIPE NCC
91.220.40.0/2491.220.40.0 - 91.220.40.2552010/10/19RIPE NCC
91.220.62.0/2491.220.62.0 - 91.220.62.2552010/10/21RIPE NCC
91.220.64.0/2491.220.64.0 - 91.220.64.2552010/10/22RIPE NCC
91.220.77.0/2491.220.77.0 - 91.220.77.2552010/10/26RIPE NCC
91.220.99.0/2491.220.99.0 - 91.220.99.2552010/11/02RIPE NCC
91.220.100.0/2491.220.100.0 - 91.220.100.2552010/11/02RIPE NCC
91.220.128.0/2491.220.128.0 - 91.220.128.2552010/11/10RIPE NCC
91.220.162.0/2491.220.162.0 - 91.220.162.2552010/11/19RIPE NCC
91.221.40.0/2391.221.40.0 - 91.221.41.2552010/10/22RIPE NCC
91.221.82.0/2391.221.82.0 - 91.221.83.2552010/11/09RIPE NCC
91.221.118.0/2391.221.118.0 - 91.221.119.2552010/11/19RIPE NCC
91.221.192.0/2391.221.192.0 - 91.221.193.2552010/12/15RIPE NCC
91.222.84.0/2291.222.84.0 - 91.222.87.2552010/12/08RIPE NCC
91.223.17.0/2491.223.17.0 - 91.223.17.2552011/01/18RIPE NCC
91.223.79.0/2491.223.79.0 - 91.223.79.2552011/02/03RIPE NCC
91.223.121.0/2491.223.121.0 - 91.223.121.2552011/02/14RIPE NCC
91.223.132.0/2491.223.132.0 - 91.223.132.2552023/08/15RIPE NCC
91.223.154.0/2491.223.154.0 - 91.223.154.2552011/02/22RIPE NCC
91.223.179.0/2491.223.179.0 - 91.223.179.2552011/03/02RIPE NCC
91.223.186.0/2491.223.186.0 - 91.223.186.2552011/03/03RIPE NCC
91.224.94.0/2391.224.94.0 - 91.224.95.2552011/02/08RIPE NCC
91.226.202.0/2391.226.202.0 - 91.226.203.2552011/04/27RIPE NCC
91.227.48.0/2491.227.48.0 - 91.227.48.2552011/05/04RIPE NCC
91.227.252.0/2491.227.252.0 - 91.227.252.2552011/05/19RIPE NCC
91.228.60.0/2391.228.60.0 - 91.228.61.2552011/05/24RIPE NCC
91.228.150.0/2491.228.150.0 - 91.228.150.2552011/08/30RIPE NCC
91.229.80.0/2291.229.80.0 - 91.229.83.2552018/04/23RIPE NCC
91.229.102.0/2391.229.102.0 - 91.229.103.2552011/06/17RIPE NCC
91.229.140.0/2491.229.140.0 - 91.229.140.2552011/06/20RIPE NCC
91.230.140.0/2391.230.140.0 - 91.230.141.2552011/07/13RIPE NCC
91.230.249.0/2491.230.249.0 - 91.230.249.2552011/07/29RIPE NCC
91.231.204.0/2491.231.204.0 - 91.231.204.2552011/10/04RIPE NCC
91.231.232.0/2491.231.232.0 - 91.231.232.2552023/08/16RIPE NCC
91.232.37.0/2491.232.37.0 - 91.232.37.2552011/10/27RIPE NCC
91.233.126.0/2491.233.126.0 - 91.233.126.2552011/12/09RIPE NCC
91.233.182.0/2491.233.182.0 - 91.233.182.2552011/12/15RIPE NCC
91.234.160.0/2491.234.160.0 - 91.234.160.2552012/01/25RIPE NCC
91.234.189.0/2491.234.189.0 - 91.234.189.2552012/01/27RIPE NCC
91.235.212.0/2491.235.212.0 - 91.235.212.2552012/02/16RIPE 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 2537 rows
CIDR
89.207.224.0/20
89.217.0.0/16
89.236.128.0/18
89.248.32.0/20
89.249.32.0/20
89.251.240.0/20
89.255.192.0/21
91.84.64.0/19
91.90.166.0/24
91.92.71.0/24
91.92.116.0/22
91.92.140.0/22
91.92.152.0/22
91.92.200.0/22
91.92.224.0/22
91.102.192.0/21
91.103.64.0/21
91.108.184.0/24
91.123.96.0/20
91.132.180.0/22
91.132.236.0/22
91.135.64.0/20
91.138.0.0/17
91.189.8.0/21
91.190.0.0/19
91.192.100.0/22
91.193.20.0/22
91.193.52.0/24
91.193.90.0/24
91.194.48.0/23
91.194.111.0/24
91.194.139.0/24
91.194.146.0/23
91.194.196.0/23
91.195.18.0/23
91.195.142.0/23
91.195.188.0/23
91.195.238.0/23
91.198.6.0/24
91.198.8.0/24
91.198.11.0/24
91.198.12.0/24
91.198.58.0/24
91.198.72.0/23
91.198.79.0/24
91.198.154.0/24
91.198.173.0/24
91.198.229.0/24
91.199.66.0/24
91.199.76.0/24
91.199.85.0/24
91.199.98.0/24
91.199.126.0/24
91.199.186.0/24
91.199.198.0/24
91.199.218.0/24
91.199.228.0/24
91.200.144.0/24
91.201.56.0/22
91.201.148.0/22
91.201.212.0/23
91.202.120.0/22
91.203.31.0/24
91.204.24.0/22
91.205.148.0/22
91.206.11.0/24
91.206.24.0/23
91.206.52.0/23
91.206.104.0/23
91.206.176.0/24
91.207.164.0/23
91.207.178.0/23
91.207.207.0/24
91.208.30.0/24
91.208.79.0/24
91.208.82.0/24
91.208.130.0/23
91.208.173.0/24
91.208.180.0/24
91.208.227.0/24
91.209.3.0/24
91.209.28.0/24
91.209.41.0/24
91.209.53.0/24
91.209.84.0/24
91.209.98.0/24
91.209.111.0/24
91.209.134.0/24
91.209.158.0/24
91.209.169.0/24
91.209.170.0/24
91.209.204.0/24
91.210.70.0/24
91.211.1.0/24
91.212.29.0/24
91.212.43.0/24
91.212.75.0/24
91.212.77.0/24
91.212.91.0/24
91.212.109.0/24
91.212.117.0/24
91.212.196.0/24
91.212.200.0/24
91.212.234.0/24
91.213.2.0/24
91.213.4.0/24
91.213.19.0/24
91.213.24.0/24
91.213.32.0/24
91.213.100.0/24
91.213.128.0/24
91.213.133.0/24
91.213.136.0/24
91.213.159.0/24
91.213.171.0/24
91.213.194.0/24
91.213.202.0/24
91.213.227.0/24
91.214.168.0/22
91.214.188.0/22
91.216.36.0/24
91.216.40.0/24
91.216.83.0/24
91.216.84.0/23
91.216.229.0/24
91.217.128.0/24
91.217.151.0/24
91.217.170.0/24
91.217.247.0/24
91.218.38.0/24
91.218.175.0/24
91.220.23.0/24
91.220.40.0/24
91.220.62.0/24
91.220.64.0/24
91.220.77.0/24
91.220.99.0/24
91.220.100.0/24
91.220.128.0/24
91.220.162.0/24
91.221.40.0/23
91.221.82.0/23
91.221.118.0/23
91.221.192.0/23
91.222.84.0/22
91.223.17.0/24
91.223.79.0/24
91.223.121.0/24
91.223.132.0/24
91.223.154.0/24
91.223.179.0/24
91.223.186.0/24
91.224.94.0/23
91.226.202.0/23
91.227.48.0/24
91.227.252.0/24
91.228.60.0/23
91.228.150.0/24
91.229.80.0/22
91.229.102.0/23
91.229.140.0/24
91.230.140.0/23
91.230.249.0/24
91.231.204.0/24
91.231.232.0/24
91.232.37.0/24
91.233.126.0/24
91.233.182.0/24
91.234.160.0/24
91.234.189.0/24
91.235.212.0/24
91.236.45.0/24
91.236.78.0/24
91.236.220.0/24
91.238.144.0/24
91.238.226.0/24
91.239.52.0/24
91.239.75.0/24
91.240.18.0/23
91.245.160.0/20
91.245.218.0/24
91.247.176.0/24
91.247.253.0/24
92.39.48.0/20
92.42.184.0/21
92.42.240.0/21
92.43.216.0/21
92.62.176.0/20
92.104.0.0/14
92.118.240.0/22
92.119.37.0/24
92.119.38.0/24
92.119.204.0/22
92.240.96.0/19
93.88.200.0/21
93.88.240.0/20
93.90.68.0/22
93.94.40.0/21
93.94.64.0/21
93.94.240.0/21