fetus

🇮🇹イタリアItaly


割り振り一覧

イタリアに割り振りされた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。

イタリアには54,033,728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1.25807%、予約領域を除くと1.45948%です。


401-600 of 3503 rows
CIDRIPアドレス割り振り日レジストリ
46.243.32.0/2146.243.32.0 - 46.243.39.2552011/01/11RIPE NCC
46.252.144.0/2046.252.144.0 - 46.252.159.2552010/12/22RIPE NCC
46.254.32.0/2146.254.32.0 - 46.254.39.2552010/12/16RIPE NCC
46.254.40.0/2146.254.40.0 - 46.254.47.2552010/12/17RIPE NCC
46.254.152.0/2246.254.152.0 - 46.254.155.2552010/12/21RIPE NCC
46.254.156.0/2246.254.156.0 - 46.254.159.2552010/12/21RIPE NCC
46.254.176.0/2146.254.176.0 - 46.254.183.2552010/12/22RIPE NCC
46.254.232.0/2146.254.232.0 - 46.254.239.2552010/12/22RIPE NCC
46.255.80.0/2146.255.80.0 - 46.255.87.2552010/12/27RIPE NCC
46.255.240.0/2146.255.240.0 - 46.255.247.2552011/01/07RIPE NCC
49.236.0.0/1849.236.0.0 - 49.236.63.2552010/11/29RIPE NCC
51.179.0.0/1751.179.0.0 - 51.179.127.2551993/09/01RIPE NCC
52.144.64.0/1952.144.64.0 - 52.144.95.2551991/12/19RIPE NCC
62.3.21.0/2462.3.21.0 - 62.3.21.2552021/11/08RIPE NCC
62.13.160.0/1962.13.160.0 - 62.13.191.2552002/01/17RIPE NCC
62.18.0.0/1562.18.0.0 - 62.19.255.2552011/11/10RIPE NCC
62.48.32.0/1962.48.32.0 - 62.48.63.2552000/05/15RIPE NCC
62.69.128.0/2162.69.128.0 - 62.69.135.2552012/09/10RIPE NCC
62.77.32.0/1962.77.32.0 - 62.77.63.2552002/10/23RIPE NCC
62.85.160.0/1962.85.160.0 - 62.85.191.2552002/02/04RIPE NCC
62.85.192.0/1862.85.192.0 - 62.85.255.2552006/09/28RIPE NCC
62.86.0.0/1662.86.0.0 - 62.86.255.2552000/07/27RIPE NCC
62.94.0.0/1662.94.0.0 - 62.94.255.2552000/08/10RIPE NCC
62.97.0.0/1962.97.0.0 - 62.97.31.2552000/07/10RIPE NCC
62.97.32.0/1962.97.32.0 - 62.97.63.2552002/11/27RIPE NCC
62.98.0.0/1662.98.0.0 - 62.98.255.2552000/08/23RIPE NCC
62.100.64.0/1962.100.64.0 - 62.100.95.2552000/06/23RIPE NCC
62.101.0.0/1962.101.0.0 - 62.101.31.2552000/07/10RIPE NCC
62.101.64.0/1862.101.64.0 - 62.101.127.2552001/07/19RIPE NCC
62.102.152.0/2162.102.152.0 - 62.102.159.2552011/03/10RIPE NCC
62.108.224.0/1962.108.224.0 - 62.108.255.2552002/12/05RIPE NCC
62.110.0.0/1662.110.0.0 - 62.110.255.2552000/09/04RIPE NCC
62.112.200.0/2162.112.200.0 - 62.112.207.2552000/06/29RIPE NCC
62.122.72.0/2262.122.72.0 - 62.122.75.2552019/05/29RIPE NCC
62.122.80.0/2162.122.80.0 - 62.122.87.2552009/02/24RIPE NCC
62.123.0.0/1662.123.0.0 - 62.123.255.2552000/11/10RIPE NCC
62.128.64.0/1962.128.64.0 - 62.128.95.2552000/06/16RIPE NCC
62.149.128.0/1962.149.128.0 - 62.149.159.2552000/01/01RIPE NCC
62.149.160.0/1962.149.160.0 - 62.149.191.2552001/04/27RIPE NCC
62.149.192.0/1862.149.192.0 - 62.149.255.2552001/04/27RIPE NCC
62.169.32.0/1962.169.32.0 - 62.169.63.2552003/03/07RIPE NCC
62.170.0.0/1662.170.0.0 - 62.170.255.2552000/08/18RIPE NCC
62.173.160.0/1962.173.160.0 - 62.173.191.2552002/03/12RIPE NCC
62.177.0.0/2062.177.0.0 - 62.177.15.2552000/07/17RIPE NCC
62.177.16.0/2162.177.16.0 - 62.177.23.2552000/07/17RIPE NCC
62.177.24.0/2162.177.24.0 - 62.177.31.2552000/07/17RIPE NCC
62.192.148.0/2262.192.148.0 - 62.192.151.2552018/10/03RIPE NCC
62.196.0.0/1662.196.0.0 - 62.196.255.2551997/10/08RIPE NCC
62.204.44.0/2462.204.44.0 - 62.204.44.2552021/10/08RIPE NCC
62.205.0.0/1962.205.0.0 - 62.205.31.2552008/03/03RIPE NCC
62.211.0.0/1662.211.0.0 - 62.211.255.2552000/11/30RIPE NCC
62.212.0.0/1962.212.0.0 - 62.212.31.2551997/10/24RIPE NCC
62.220.64.0/2062.220.64.0 - 62.220.79.2552000/06/22RIPE NCC
62.220.80.0/2062.220.80.0 - 62.220.95.2552000/06/22RIPE NCC
62.221.160.0/1962.221.160.0 - 62.221.191.2552002/04/22RIPE NCC
62.233.58.0/2462.233.58.0 - 62.233.58.2552021/10/14RIPE NCC
62.233.63.0/2462.233.63.0 - 62.233.63.2552021/10/14RIPE NCC
62.241.0.0/1962.241.0.0 - 62.241.31.2552000/07/20RIPE NCC
62.249.32.0/1962.249.32.0 - 62.249.63.2552003/05/28RIPE NCC
66.71.128.0/1866.71.128.0 - 66.71.191.2552001/02/09RIPE NCC
67.231.176.0/2067.231.176.0 - 67.231.191.2552009/05/26RIPE NCC
69.172.96.0/1969.172.96.0 - 69.172.127.2552009/03/25RIPE NCC
74.122.239.0/2474.122.239.0 - 74.122.239.2552010/02/26RIPE NCC
77.32.0.0/1777.32.0.0 - 77.32.127.2552006/12/13RIPE NCC
77.39.128.0/1977.39.128.0 - 77.39.159.2552007/03/28RIPE NCC
77.39.160.0/1977.39.160.0 - 77.39.191.2552007/03/28RIPE NCC
77.39.192.0/2077.39.192.0 - 77.39.207.2552007/03/28RIPE NCC
77.39.208.0/2177.39.208.0 - 77.39.215.2552007/03/28RIPE NCC
77.39.216.0/2277.39.216.0 - 77.39.219.2552007/03/28RIPE NCC
77.39.220.0/2277.39.220.0 - 77.39.223.2552007/03/28RIPE NCC
77.39.224.0/1977.39.224.0 - 77.39.255.2552007/03/28RIPE NCC
77.43.0.0/1777.43.0.0 - 77.43.127.2552006/12/07RIPE NCC
77.72.24.0/2177.72.24.0 - 77.72.31.2552007/01/17RIPE NCC
77.72.32.0/2177.72.32.0 - 77.72.39.2552007/01/18RIPE NCC
77.72.87.0/2477.72.87.0 - 77.72.87.2552021/08/10RIPE NCC
77.72.192.0/2177.72.192.0 - 77.72.199.2552007/02/19RIPE NCC
77.73.56.0/2177.73.56.0 - 77.73.63.2552007/03/05RIPE NCC
77.74.16.0/2177.74.16.0 - 77.74.23.2552007/04/10RIPE NCC
77.74.144.0/2177.74.144.0 - 77.74.151.2552007/04/18RIPE NCC
77.75.56.0/2277.75.56.0 - 77.75.59.2552018/08/09RIPE NCC
77.75.227.0/2477.75.227.0 - 77.75.227.2552021/08/10RIPE NCC
77.81.103.0/2477.81.103.0 - 77.81.103.2552007/02/15RIPE NCC
77.81.143.0/2477.81.143.0 - 77.81.143.2552007/02/15RIPE NCC
77.81.166.0/2477.81.166.0 - 77.81.166.2552007/02/15RIPE NCC
77.81.224.0/2077.81.224.0 - 77.81.239.2552007/02/15RIPE NCC
77.83.12.0/2277.83.12.0 - 77.83.15.2552018/12/12RIPE NCC
77.83.64.0/2277.83.64.0 - 77.83.67.2552018/12/13RIPE NCC
77.83.112.0/2277.83.112.0 - 77.83.115.2552018/12/13RIPE NCC
77.83.216.0/2277.83.216.0 - 77.83.219.2552018/12/13RIPE NCC
77.89.0.0/1877.89.0.0 - 77.89.63.2552007/03/21RIPE NCC
77.93.224.0/1977.93.224.0 - 77.93.255.2552007/05/24RIPE NCC
77.94.64.0/2377.94.64.0 - 77.94.65.2552007/05/29RIPE NCC
77.94.66.0/2377.94.66.0 - 77.94.67.2552007/05/29RIPE NCC
77.94.68.0/2277.94.68.0 - 77.94.71.2552007/05/29RIPE NCC
77.94.72.0/2177.94.72.0 - 77.94.79.2552007/05/29RIPE NCC
77.94.80.0/2077.94.80.0 - 77.94.95.2552007/05/29RIPE NCC
77.95.136.0/2177.95.136.0 - 77.95.143.2552007/06/07RIPE NCC
77.95.168.0/2177.95.168.0 - 77.95.175.2552007/06/13RIPE NCC
77.95.208.0/2177.95.208.0 - 77.95.215.2552007/06/18RIPE NCC
77.108.0.0/1877.108.0.0 - 77.108.63.2552007/01/16RIPE NCC
77.223.4.0/2277.223.4.0 - 77.223.7.2552007/04/19RIPE NCC
77.238.0.0/1977.238.0.0 - 77.238.31.2552007/02/08RIPE NCC
77.239.128.0/1977.239.128.0 - 77.239.159.2552007/03/09RIPE NCC
77.240.224.0/2077.240.224.0 - 77.240.239.2552007/01/24RIPE NCC
77.241.0.0/2077.241.0.0 - 77.241.15.2552007/01/26RIPE NCC
77.241.208.0/2077.241.208.0 - 77.241.223.2552007/02/14RIPE NCC
77.242.32.0/2077.242.32.0 - 77.242.47.2552007/02/23RIPE NCC
77.242.128.0/2077.242.128.0 - 77.242.143.2552007/03/01RIPE NCC
77.242.176.0/2077.242.176.0 - 77.242.191.2552007/03/01RIPE NCC
77.244.80.0/2077.244.80.0 - 77.244.95.2552007/03/23RIPE NCC
77.244.176.0/2077.244.176.0 - 77.244.191.2552007/04/04RIPE NCC
77.246.0.0/2077.246.0.0 - 77.246.15.2552007/05/07RIPE NCC
77.247.199.0/2477.247.199.0 - 77.247.199.2552023/03/08RIPE NCC
78.4.0.0/1478.4.0.0 - 78.7.255.2552007/02/20RIPE NCC
78.24.80.0/2178.24.80.0 - 78.24.87.2552007/08/29RIPE NCC
78.26.64.0/1878.26.64.0 - 78.26.127.2552007/09/03RIPE NCC
78.40.111.0/2478.40.111.0 - 78.40.111.2552007/07/13RIPE NCC
78.40.128.0/2178.40.128.0 - 78.40.135.2552007/07/16RIPE NCC
78.40.160.0/2178.40.160.0 - 78.40.167.2552007/07/19RIPE NCC
78.40.168.0/2178.40.168.0 - 78.40.175.2552007/07/19RIPE NCC
78.40.200.0/2178.40.200.0 - 78.40.207.2552008/05/28RIPE NCC
78.110.176.0/2078.110.176.0 - 78.110.191.2552007/08/15RIPE NCC
78.111.224.0/2078.111.224.0 - 78.111.239.2552007/09/26RIPE NCC
78.134.0.0/1778.134.0.0 - 78.134.127.2552007/06/12RIPE NCC
78.138.3.0/2478.138.3.0 - 78.138.3.2552007/06/07RIPE NCC
78.138.18.0/2378.138.18.0 - 78.138.19.2552007/06/07RIPE NCC
78.138.26.0/2378.138.26.0 - 78.138.27.2552007/06/07RIPE NCC
78.138.28.0/2378.138.28.0 - 78.138.29.2552007/06/07RIPE NCC
78.138.32.0/2278.138.32.0 - 78.138.35.2552007/06/07RIPE NCC
78.138.42.0/2378.138.42.0 - 78.138.43.2552007/06/07RIPE NCC
78.142.196.0/2278.142.196.0 - 78.142.199.2552018/11/13RIPE NCC
78.142.240.0/2478.142.240.0 - 78.142.240.2552018/11/14RIPE NCC
78.152.96.0/1978.152.96.0 - 78.152.127.2552007/06/13RIPE NCC
78.159.144.0/2278.159.144.0 - 78.159.147.2552007/09/18RIPE NCC
78.159.192.0/2178.159.192.0 - 78.159.199.2552007/09/19RIPE NCC
78.159.200.0/2178.159.200.0 - 78.159.207.2552007/09/19RIPE NCC
78.159.208.0/2178.159.208.0 - 78.159.215.2552007/09/19RIPE NCC
78.159.216.0/2178.159.216.0 - 78.159.223.2552007/09/19RIPE NCC
79.0.0.0/1079.0.0.0 - 79.63.255.2552007/02/21RIPE NCC
79.98.0.0/2179.98.0.0 - 79.98.7.2552007/10/22RIPE NCC
79.98.40.0/2179.98.40.0 - 79.98.47.2552007/10/26RIPE NCC
79.99.8.0/2179.99.8.0 - 79.99.15.2552007/11/14RIPE NCC
79.99.112.0/2179.99.112.0 - 79.99.119.2552007/11/20RIPE NCC
79.133.100.0/2279.133.100.0 - 79.133.103.2552007/10/10RIPE NCC
79.135.32.0/1979.135.32.0 - 79.135.63.2552007/10/30RIPE NCC
79.140.80.0/2079.140.80.0 - 79.140.95.2552007/10/05RIPE NCC
79.141.176.0/2079.141.176.0 - 79.141.191.2552007/10/23RIPE NCC
79.143.112.0/2079.143.112.0 - 79.143.127.2552007/11/23RIPE NCC
79.171.160.0/2179.171.160.0 - 79.171.167.2552007/10/16RIPE NCC
80.16.0.0/1380.16.0.0 - 80.23.255.2552001/06/12RIPE NCC
80.64.112.0/2080.64.112.0 - 80.64.127.2552004/02/12RIPE NCC
80.64.212.0/2280.64.212.0 - 80.64.215.2552018/08/13RIPE NCC
80.65.144.0/2080.65.144.0 - 80.65.159.2552004/04/14RIPE NCC
80.66.208.0/2080.66.208.0 - 80.66.223.2552004/06/15RIPE NCC
80.67.112.0/2080.67.112.0 - 80.67.127.2552004/07/14RIPE NCC
80.68.176.0/2080.68.176.0 - 80.68.191.2552004/10/04RIPE NCC
80.68.192.0/2080.68.192.0 - 80.68.207.2552001/05/25RIPE NCC
80.69.240.0/2080.69.240.0 - 80.69.255.2552009/04/03RIPE NCC
80.70.112.0/2280.70.112.0 - 80.70.115.2552004/12/21RIPE NCC
80.70.116.0/2280.70.116.0 - 80.70.119.2552004/12/21RIPE NCC
80.71.224.0/2080.71.224.0 - 80.71.239.2552001/06/07RIPE NCC
80.72.160.0/2080.72.160.0 - 80.72.175.2552001/06/12RIPE NCC
80.73.224.0/2080.73.224.0 - 80.73.239.2552001/06/18RIPE NCC
80.74.176.0/2080.74.176.0 - 80.74.191.2552003/04/08RIPE NCC
80.76.16.0/2080.76.16.0 - 80.76.31.2552005/02/18RIPE NCC
80.76.64.0/2080.76.64.0 - 80.76.79.2552001/06/25RIPE NCC
80.76.80.0/2080.76.80.0 - 80.76.95.2552005/02/21RIPE NCC
80.80.239.0/2480.80.239.0 - 80.80.239.2552001/07/19RIPE NCC
80.82.0.0/2080.82.0.0 - 80.82.15.2552001/07/24RIPE NCC
80.83.160.0/2080.83.160.0 - 80.83.175.2552001/08/02RIPE NCC
80.84.96.0/2080.84.96.0 - 80.84.111.2552001/08/10RIPE NCC
80.86.48.0/2080.86.48.0 - 80.86.63.2552005/05/10RIPE NCC
80.86.144.0/2080.86.144.0 - 80.86.159.2552005/05/11RIPE NCC
80.88.80.0/2080.88.80.0 - 80.88.95.2552005/05/26RIPE NCC
80.88.160.0/2080.88.160.0 - 80.88.175.2552001/08/28RIPE NCC
80.88.232.0/2180.88.232.0 - 80.88.239.2552001/08/29RIPE NCC
80.91.48.0/2080.91.48.0 - 80.91.63.2552005/06/08RIPE NCC
80.93.64.0/2080.93.64.0 - 80.93.79.2552001/09/25RIPE NCC
80.93.128.0/2080.93.128.0 - 80.93.143.2552001/09/26RIPE NCC
80.94.112.0/2080.94.112.0 - 80.94.127.2552005/08/02RIPE NCC
80.104.0.0/1580.104.0.0 - 80.105.255.2552001/07/17RIPE NCC
80.116.0.0/1580.116.0.0 - 80.117.255.2552001/08/06RIPE NCC
80.180.0.0/1480.180.0.0 - 80.183.255.2552002/09/26RIPE NCC
80.204.0.0/1480.204.0.0 - 80.207.255.2552001/12/12RIPE NCC
80.208.248.0/2280.208.248.0 - 80.208.251.2552001/12/12RIPE NCC
80.210.96.0/1980.210.96.0 - 80.210.127.2552001/12/12RIPE NCC
80.211.0.0/1680.211.0.0 - 80.211.255.2552001/12/12RIPE NCC
80.241.136.0/2280.241.136.0 - 80.241.139.2552018/06/19RIPE NCC
80.241.140.0/2280.241.140.0 - 80.241.143.2552018/06/19RIPE NCC
80.241.224.0/2080.241.224.0 - 80.241.239.2552001/10/23RIPE NCC
80.244.6.0/2480.244.6.0 - 80.244.6.2552024/01/29RIPE NCC
80.244.112.0/2080.244.112.0 - 80.244.127.2552005/09/26RIPE NCC
80.247.64.0/2080.247.64.0 - 80.247.79.2552001/11/12RIPE NCC
80.249.32.0/2080.249.32.0 - 80.249.47.2552009/01/15RIPE NCC
80.249.124.0/2280.249.124.0 - 80.249.127.2552018/08/15RIPE NCC
80.252.192.0/2080.252.192.0 - 80.252.207.2552001/12/11RIPE NCC
80.252.224.0/2080.252.224.0 - 80.252.239.2552001/12/11RIPE NCC
80.253.32.0/2080.253.32.0 - 80.253.47.2552001/12/11RIPE NCC
80.254.192.0/2080.254.192.0 - 80.254.207.2552001/12/19RIPE NCC
81.16.220.0/2281.16.220.0 - 81.16.223.2552018/08/16RIPE 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。

201-400 of 3179 rows
CIDR
37.220.40.0/21
37.221.96.0/22
37.226.0.0/15
37.247.48.0/21
45.8.74.0/23
45.9.96.0/22
45.9.224.0/22
45.10.12.0/22
45.10.72.0/22
45.10.84.0/22
45.10.220.0/22
45.11.116.0/22
45.12.248.0/22
45.13.68.0/22
45.13.80.0/22
45.13.88.0/22
45.13.120.0/22
45.13.128.0/22
45.13.144.0/22
45.14.152.0/22
45.14.160.0/22
45.14.184.0/22
45.15.92.0/22
45.33.224.0/20
45.65.120.0/22
45.66.16.0/22
45.66.80.0/22
45.66.100.0/22
45.66.144.0/22
45.66.204.0/22
45.66.224.0/22
45.67.40.0/22
45.67.112.0/22
45.67.124.0/22
45.80.172.0/23
45.81.64.0/22
45.81.156.0/22
45.82.0.0/22
45.82.112.0/22
45.82.132.0/22
45.82.200.0/22
45.82.228.0/22
45.83.56.0/22
45.84.140.0/22
45.84.168.0/22
45.85.16.0/22
45.85.164.0/22
45.86.108.0/22
45.86.144.0/21
45.87.36.0/22
45.87.64.0/22
45.89.120.0/22
45.89.180.0/22
45.90.92.0/22
45.90.124.0/22
45.90.168.0/22
45.90.232.0/22
45.90.240.0/22
45.91.120.0/24
45.91.184.0/22
45.92.56.0/22
45.92.148.0/22
45.93.36.0/22
45.93.204.0/22
45.94.0.0/22
45.95.10.0/24
45.95.210.0/23
45.117.232.0/22
45.128.240.0/22
45.129.160.0/22
45.129.165.0/24
45.129.248.0/22
45.130.88.0/22
45.130.108.0/22
45.131.8.0/22
45.131.220.0/22
45.131.236.0/22
45.132.208.0/21
45.132.220.0/22
45.133.12.0/22
45.133.144.0/22
45.133.242.0/24
45.135.24.0/22
45.135.68.0/22
45.136.110.0/24
45.137.232.0/22
45.138.188.0/22
45.138.200.0/22
45.139.96.0/21
45.140.84.0/22
45.140.196.0/22
45.141.40.0/22
45.141.228.0/22
45.142.15.0/24
45.142.132.0/22
45.142.168.0/22
45.142.184.0/22
45.143.36.0/22
45.143.100.0/22
45.143.180.0/22
45.144.60.0/22
45.144.100.0/22
45.144.140.0/22
45.145.24.0/22
45.145.200.0/21
45.147.236.0/22
45.148.20.0/22
45.148.212.0/22
45.149.232.0/24
45.150.200.0/22
45.151.12.0/22
45.151.64.0/22
45.152.144.0/22
45.154.72.0/22
45.155.8.0/22
45.156.60.0/22
45.157.64.0/22
45.157.228.0/22
45.159.36.0/22
45.159.60.0/22
45.159.66.0/23
46.16.88.0/21
46.16.168.0/21
46.17.152.0/21
46.18.24.0/21
46.18.136.0/21
46.18.232.0/21
46.19.48.0/21
46.19.232.0/21
46.20.80.0/20
46.21.176.0/20
46.23.192.0/20
46.28.0.0/21
46.28.15.0/24
46.28.24.0/21
46.28.120.0/21
46.29.104.0/21
46.29.200.0/21
46.30.168.0/21
46.30.216.0/21
46.30.240.0/20
46.31.104.0/21
46.31.128.0/21
46.31.248.0/21
46.37.0.0/19
46.37.224.0/19
46.44.192.0/18
46.102.101.0/24
46.102.112.0/22
46.102.173.0/24
46.102.174.0/24
46.102.188.0/23
46.141.0.0/16
46.149.97.0/24
46.149.102.0/24
46.149.108.0/24
46.149.168.0/22
46.182.88.0/21
46.182.152.0/21
46.182.232.0/21
46.183.232.0/21
46.226.176.0/21
46.226.200.0/21
46.227.0.0/21
46.228.240.0/20
46.229.80.0/20
46.231.24.0/21
46.231.32.0/21
46.232.136.0/21
46.232.144.0/21
46.233.128.0/18
46.234.192.0/18
46.235.136.0/21
46.243.32.0/21
46.252.144.0/20
46.254.32.0/20
46.254.152.0/21
46.254.176.0/21
46.254.232.0/21
46.255.80.0/21
46.255.240.0/21
49.236.0.0/18
51.179.0.0/17
52.144.64.0/19
62.3.21.0/24
62.13.160.0/19
62.18.0.0/15
62.48.32.0/19
62.69.128.0/21
62.77.32.0/19
62.85.160.0/19
62.85.192.0/18
62.86.0.0/16
62.94.0.0/16
62.97.0.0/18
62.98.0.0/16
62.100.64.0/19
62.101.0.0/19
62.101.64.0/18
62.102.152.0/21