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54,028,608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1.25795%、予約領域を除くと1.45934%です。


601-800 of 3480 rows
CIDRIPアドレス割り振り日レジストリ
81.22.224.0/2281.22.224.0 - 81.22.227.2552018/09/11RIPE NCC
81.23.80.0/2081.23.80.0 - 81.23.95.2552006/02/14RIPE NCC
81.24.224.0/2081.24.224.0 - 81.24.239.2552002/03/19RIPE NCC
81.25.72.0/2281.25.72.0 - 81.25.75.2552018/08/17RIPE NCC
81.25.96.0/2081.25.96.0 - 81.25.111.2552002/03/22RIPE NCC
81.26.192.0/2181.26.192.0 - 81.26.199.2552002/04/04RIPE NCC
81.27.128.0/2081.27.128.0 - 81.27.143.2552002/04/12RIPE NCC
81.27.176.0/2081.27.176.0 - 81.27.191.2552006/03/13RIPE NCC
81.28.8.0/2281.28.8.0 - 81.28.11.2552002/04/16RIPE NCC
81.29.144.0/2081.29.144.0 - 81.29.159.2552006/03/28RIPE NCC
81.29.176.0/2281.29.176.0 - 81.29.179.2552006/03/28RIPE NCC
81.29.180.0/2281.29.180.0 - 81.29.183.2552006/03/28RIPE NCC
81.29.184.0/2181.29.184.0 - 81.29.191.2552006/03/28RIPE NCC
81.29.224.0/2081.29.224.0 - 81.29.239.2552002/05/07RIPE NCC
81.30.0.0/2081.30.0.0 - 81.30.15.2552002/05/08RIPE NCC
81.30.16.0/2081.30.16.0 - 81.30.31.2552006/03/30RIPE NCC
81.31.144.0/2081.31.144.0 - 81.31.159.2552006/04/11RIPE NCC
81.72.0.0/1481.72.0.0 - 81.75.255.2552002/01/18RIPE NCC
81.81.0.0/1681.81.0.0 - 81.81.255.2552002/04/10RIPE NCC
81.88.48.0/2081.88.48.0 - 81.88.63.2552006/04/10RIPE NCC
81.88.224.0/2081.88.224.0 - 81.88.239.2552002/06/20RIPE NCC
81.88.240.0/2081.88.240.0 - 81.88.255.2552005/08/30RIPE NCC
81.92.32.0/2081.92.32.0 - 81.92.47.2552002/07/26RIPE NCC
81.93.32.0/2081.93.32.0 - 81.93.47.2552009/06/17RIPE NCC
81.112.0.0/1381.112.0.0 - 81.119.255.2552002/07/08RIPE NCC
81.120.0.0/1481.120.0.0 - 81.123.255.2552002/07/08RIPE NCC
81.124.0.0/1581.124.0.0 - 81.125.255.2552002/07/08RIPE NCC
81.126.0.0/1581.126.0.0 - 81.127.255.2552002/07/08RIPE NCC
81.161.232.0/2281.161.232.0 - 81.161.235.2552018/08/21RIPE NCC
81.173.36.0/2281.173.36.0 - 81.173.39.2552003/02/19RIPE NCC
81.173.100.0/2281.173.100.0 - 81.173.103.2552003/02/19RIPE NCC
81.174.0.0/1881.174.0.0 - 81.174.63.2552003/02/25RIPE NCC
81.174.64.0/1881.174.64.0 - 81.174.127.2552003/02/25RIPE NCC
81.200.128.0/2081.200.128.0 - 81.200.143.2552002/10/01RIPE NCC
81.200.224.0/2081.200.224.0 - 81.200.239.2552002/10/07RIPE NCC
81.201.0.0/2081.201.0.0 - 81.201.15.2552002/10/07RIPE NCC
81.208.0.0/1781.208.0.0 - 81.208.127.2552002/10/01RIPE NCC
82.48.0.0/1282.48.0.0 - 82.63.255.2552003/08/07RIPE NCC
82.84.0.0/1582.84.0.0 - 82.85.255.2552003/05/22RIPE NCC
82.88.0.0/1482.88.0.0 - 82.91.255.2552003/05/07RIPE NCC
82.97.224.0/2082.97.224.0 - 82.97.239.2552003/12/02RIPE NCC
82.104.0.0/1482.104.0.0 - 82.107.255.2552003/10/22RIPE NCC
82.113.192.0/1982.113.192.0 - 82.113.223.2552003/12/16RIPE NCC
82.115.160.0/1982.115.160.0 - 82.115.191.2552004/01/16RIPE NCC
82.119.32.0/1982.119.32.0 - 82.119.63.2552004/02/16RIPE NCC
82.119.192.0/1982.119.192.0 - 82.119.223.2552004/02/17RIPE NCC
82.134.192.0/1882.134.192.0 - 82.134.255.2552003/09/05RIPE NCC
82.143.0.0/1882.143.0.0 - 82.143.63.2552003/09/11RIPE NCC
82.145.96.0/2082.145.96.0 - 82.145.111.2552003/06/10RIPE NCC
82.145.112.0/2082.145.112.0 - 82.145.127.2552003/06/10RIPE NCC
82.145.160.0/1982.145.160.0 - 82.145.191.2552003/06/16RIPE NCC
82.149.32.0/1982.149.32.0 - 82.149.63.2552011/08/03RIPE NCC
82.163.32.0/2282.163.32.0 - 82.163.35.2552003/07/25RIPE NCC
82.180.32.0/1982.180.32.0 - 82.180.63.2552003/10/09RIPE NCC
82.184.0.0/1382.184.0.0 - 82.191.255.2552003/09/16RIPE NCC
82.192.128.0/1982.192.128.0 - 82.192.159.2552003/09/25RIPE NCC
82.193.0.0/1982.193.0.0 - 82.193.31.2552003/10/01RIPE NCC
82.193.32.0/1982.193.32.0 - 82.193.63.2552007/05/11RIPE NCC
82.213.64.0/1882.213.64.0 - 82.213.127.2552003/10/22RIPE NCC
82.215.84.0/2482.215.84.0 - 82.215.84.2552023/03/13RIPE NCC
82.215.128.0/1882.215.128.0 - 82.215.191.2552003/11/21RIPE NCC
83.98.80.0/2083.98.80.0 - 83.98.95.2552004/01/12RIPE NCC
83.103.0.0/1783.103.0.0 - 83.103.127.2552004/03/08RIPE NCC
83.136.104.0/2183.136.104.0 - 83.136.111.2552004/02/20RIPE NCC
83.137.56.0/2183.137.56.0 - 83.137.63.2552004/05/07RIPE NCC
83.137.104.0/2183.137.104.0 - 83.137.111.2552004/05/18RIPE NCC
83.137.160.0/2183.137.160.0 - 83.137.167.2552004/06/01RIPE NCC
83.137.232.0/2183.137.232.0 - 83.137.239.2552004/06/22RIPE NCC
83.139.192.0/2183.139.192.0 - 83.139.199.2552004/09/07RIPE NCC
83.139.200.0/2383.139.200.0 - 83.139.201.2552004/09/07RIPE NCC
83.139.202.0/2383.139.202.0 - 83.139.203.2552004/09/07RIPE NCC
83.139.204.0/2283.139.204.0 - 83.139.207.2552004/09/07RIPE NCC
83.139.208.0/2283.139.208.0 - 83.139.211.2552004/09/07RIPE NCC
83.139.212.0/2283.139.212.0 - 83.139.215.2552004/09/07RIPE NCC
83.139.216.0/2283.139.216.0 - 83.139.219.2552004/09/07RIPE NCC
83.139.220.0/2383.139.220.0 - 83.139.221.2552004/09/07RIPE NCC
83.139.222.0/2383.139.222.0 - 83.139.223.2552004/09/07RIPE NCC
83.139.224.0/2083.139.224.0 - 83.139.239.2552004/09/07RIPE NCC
83.139.240.0/2383.139.240.0 - 83.139.241.2552004/09/07RIPE NCC
83.139.242.0/2383.139.242.0 - 83.139.243.2552004/09/07RIPE NCC
83.139.244.0/2383.139.244.0 - 83.139.245.2552004/09/07RIPE NCC
83.139.246.0/2383.139.246.0 - 83.139.247.2552004/09/07RIPE NCC
83.139.248.0/2183.139.248.0 - 83.139.255.2552004/09/07RIPE NCC
83.147.64.0/1883.147.64.0 - 83.147.127.2552004/02/18RIPE NCC
83.149.128.0/1883.149.128.0 - 83.149.191.2552004/03/15RIPE NCC
83.171.196.0/2283.171.196.0 - 83.171.199.2552018/11/15RIPE NCC
83.174.144.0/2283.174.144.0 - 83.174.147.2552004/05/21RIPE NCC
83.175.0.0/1883.175.0.0 - 83.175.63.2552004/05/27RIPE NCC
83.211.0.0/1683.211.0.0 - 83.211.255.2552004/03/11RIPE NCC
83.216.160.0/1983.216.160.0 - 83.216.191.2552004/02/26RIPE NCC
83.217.176.0/2083.217.176.0 - 83.217.191.2552004/03/08RIPE NCC
83.220.0.0/2083.220.0.0 - 83.220.15.2552004/03/29RIPE NCC
83.220.16.0/2183.220.16.0 - 83.220.23.2552004/03/29RIPE NCC
83.220.24.0/2283.220.24.0 - 83.220.27.2552004/03/29RIPE NCC
83.220.28.0/2383.220.28.0 - 83.220.29.2552004/03/29RIPE NCC
83.220.30.0/2383.220.30.0 - 83.220.31.2552004/03/29RIPE NCC
83.221.96.0/1983.221.96.0 - 83.221.127.2552004/04/13RIPE NCC
83.224.0.0/1583.224.0.0 - 83.225.255.2552004/02/05RIPE NCC
83.229.8.0/2283.229.8.0 - 83.229.11.2552004/05/13RIPE NCC
83.229.94.0/2483.229.94.0 - 83.229.94.2552004/05/13RIPE NCC
84.18.128.0/1984.18.128.0 - 84.18.159.2552004/08/12RIPE NCC
84.21.176.0/2284.21.176.0 - 84.21.179.2552018/10/04RIPE NCC
84.33.0.0/1884.33.0.0 - 84.33.63.2552004/08/19RIPE NCC
84.33.64.0/1884.33.64.0 - 84.33.127.2552004/08/19RIPE NCC
84.33.128.0/1884.33.128.0 - 84.33.191.2552004/08/19RIPE NCC
84.33.192.0/1884.33.192.0 - 84.33.255.2552004/08/19RIPE NCC
84.38.48.0/2084.38.48.0 - 84.38.63.2552006/04/18RIPE NCC
84.38.251.0/2484.38.251.0 - 84.38.251.2552023/06/05RIPE NCC
84.220.0.0/1584.220.0.0 - 84.221.255.2552004/06/02RIPE NCC
84.234.100.0/2284.234.100.0 - 84.234.103.2552011/01/14RIPE NCC
84.240.128.0/1884.240.128.0 - 84.240.191.2552004/06/03RIPE NCC
84.246.144.0/2184.246.144.0 - 84.246.151.2552004/09/27RIPE NCC
84.247.16.0/2484.247.16.0 - 84.247.16.2552004/10/08RIPE NCC
84.247.18.0/2484.247.18.0 - 84.247.18.2552004/10/08RIPE NCC
84.247.192.0/1884.247.192.0 - 84.247.255.2552004/10/13RIPE NCC
84.253.128.0/1884.253.128.0 - 84.253.191.2552004/09/20RIPE NCC
84.254.128.0/1884.254.128.0 - 84.254.191.2552004/10/06RIPE NCC
85.8.153.0/2485.8.153.0 - 85.8.153.2552024/01/11RIPE NCC
85.8.172.0/2285.8.172.0 - 85.8.175.2552018/11/16RIPE NCC
85.18.0.0/1685.18.0.0 - 85.18.255.2552005/03/14RIPE NCC
85.20.0.0/1685.20.0.0 - 85.20.255.2552005/03/17RIPE NCC
85.31.160.0/2185.31.160.0 - 85.31.167.2552005/07/13RIPE NCC
85.32.0.0/1285.32.0.0 - 85.47.255.2552004/08/10RIPE NCC
85.88.192.0/1985.88.192.0 - 85.88.223.2552004/10/29RIPE NCC
85.89.128.0/1985.89.128.0 - 85.89.159.2552004/11/03RIPE NCC
85.94.192.0/1985.94.192.0 - 85.94.223.2552005/01/04RIPE NCC
85.115.196.0/2285.115.196.0 - 85.115.199.2552018/10/08RIPE NCC
85.116.128.0/2185.116.128.0 - 85.116.135.2552005/03/11RIPE NCC
85.116.136.0/2285.116.136.0 - 85.116.139.2552005/03/11RIPE NCC
85.116.140.0/2285.116.140.0 - 85.116.143.2552005/03/11RIPE NCC
85.116.144.0/2285.116.144.0 - 85.116.147.2552005/03/11RIPE NCC
85.116.148.0/2285.116.148.0 - 85.116.151.2552005/03/11RIPE NCC
85.116.152.0/2185.116.152.0 - 85.116.159.2552005/03/11RIPE NCC
85.116.224.0/1985.116.224.0 - 85.116.255.2552005/03/16RIPE NCC
85.118.144.0/2185.118.144.0 - 85.118.151.2552005/04/21RIPE NCC
85.119.40.0/2185.119.40.0 - 85.119.47.2552005/05/27RIPE NCC
85.119.176.0/2185.119.176.0 - 85.119.183.2552005/06/21RIPE NCC
85.158.240.0/2185.158.240.0 - 85.158.247.2552010/12/06RIPE NCC
85.159.115.0/2485.159.115.0 - 85.159.115.2552019/12/30RIPE NCC
85.159.118.0/2485.159.118.0 - 85.159.118.2552019/12/30RIPE NCC
85.159.144.0/2185.159.144.0 - 85.159.151.2552009/04/14RIPE NCC
85.159.176.0/2185.159.176.0 - 85.159.183.2552005/03/30RIPE NCC
85.159.192.0/2185.159.192.0 - 85.159.199.2552005/03/30RIPE NCC
85.159.200.0/2185.159.200.0 - 85.159.207.2552005/03/31RIPE NCC
85.204.42.0/2485.204.42.0 - 85.204.42.2552005/01/13RIPE NCC
85.204.112.0/2285.204.112.0 - 85.204.115.2552005/01/13RIPE NCC
85.204.119.0/2485.204.119.0 - 85.204.119.2552005/01/13RIPE NCC
85.204.147.0/2485.204.147.0 - 85.204.147.2552005/01/13RIPE NCC
85.204.172.0/2285.204.172.0 - 85.204.175.2552005/01/13RIPE NCC
85.204.252.0/2485.204.252.0 - 85.204.252.2552005/01/13RIPE NCC
85.204.255.0/2485.204.255.0 - 85.204.255.2552005/01/13RIPE NCC
85.208.76.0/2285.208.76.0 - 85.208.79.2552019/02/21RIPE NCC
85.208.200.0/2285.208.200.0 - 85.208.203.2552019/02/22RIPE NCC
85.208.232.0/2285.208.232.0 - 85.208.235.2552019/02/22RIPE NCC
85.208.240.0/2485.208.240.0 - 85.208.240.2552019/02/22RIPE NCC
85.208.241.0/2485.208.241.0 - 85.208.241.2552019/02/22RIPE NCC
85.208.242.0/2385.208.242.0 - 85.208.243.2552019/02/22RIPE NCC
85.209.112.0/2285.209.112.0 - 85.209.115.2552019/02/26RIPE NCC
85.235.128.0/1985.235.128.0 - 85.235.159.2552005/05/11RIPE NCC
85.239.160.0/1985.239.160.0 - 85.239.191.2552005/06/20RIPE NCC
86.104.6.0/2486.104.6.0 - 86.104.6.2552005/04/18RIPE NCC
86.104.135.0/2486.104.135.0 - 86.104.135.2552005/04/18RIPE NCC
86.104.229.0/2486.104.229.0 - 86.104.229.2552005/04/18RIPE NCC
86.105.8.0/2486.105.8.0 - 86.105.8.2552005/04/18RIPE NCC
86.105.14.0/2486.105.14.0 - 86.105.14.2552005/04/18RIPE NCC
86.105.48.0/2186.105.48.0 - 86.105.55.2552005/04/18RIPE NCC
86.105.177.0/2486.105.177.0 - 86.105.177.2552005/04/18RIPE NCC
86.105.179.0/2486.105.179.0 - 86.105.179.2552005/04/18RIPE NCC
86.105.236.0/2286.105.236.0 - 86.105.239.2552005/04/18RIPE NCC
86.106.16.0/2486.106.16.0 - 86.106.16.2552005/04/18RIPE NCC
86.106.75.0/2486.106.75.0 - 86.106.75.2552005/04/18RIPE NCC
86.106.76.0/2486.106.76.0 - 86.106.76.2552005/04/18RIPE NCC
86.106.188.0/2286.106.188.0 - 86.106.191.2552005/04/18RIPE NCC
86.107.32.0/2186.107.32.0 - 86.107.39.2552005/04/18RIPE NCC
86.107.96.0/2286.107.96.0 - 86.107.99.2552005/04/18RIPE NCC
86.107.110.0/2486.107.110.0 - 86.107.110.2552005/04/18RIPE NCC
86.109.128.0/1986.109.128.0 - 86.109.159.2552005/07/06RIPE NCC
86.110.128.0/1986.110.128.0 - 86.110.159.2552005/07/19RIPE NCC
87.0.0.0/1187.0.0.0 - 87.31.255.2552005/07/13RIPE NCC
87.120.46.0/2387.120.46.0 - 87.120.47.2552005/07/12RIPE NCC
87.120.63.0/2487.120.63.0 - 87.120.63.2552005/07/12RIPE NCC
87.120.80.0/2387.120.80.0 - 87.120.81.2552005/07/12RIPE NCC
87.120.85.0/2487.120.85.0 - 87.120.85.2552005/07/12RIPE NCC
87.120.86.0/2487.120.86.0 - 87.120.86.2552005/07/12RIPE NCC
87.120.96.0/2387.120.96.0 - 87.120.97.2552005/07/12RIPE NCC
87.120.111.0/2487.120.111.0 - 87.120.111.2552005/07/12RIPE NCC
87.120.177.0/2487.120.177.0 - 87.120.177.2552005/07/12RIPE NCC
87.120.203.0/2487.120.203.0 - 87.120.203.2552005/07/12RIPE NCC
87.120.218.0/2487.120.218.0 - 87.120.218.2552005/07/12RIPE NCC
87.120.224.0/2487.120.224.0 - 87.120.224.2552005/07/12RIPE NCC
87.120.226.0/2487.120.226.0 - 87.120.226.2552005/07/12RIPE NCC
87.120.232.0/2287.120.232.0 - 87.120.235.2552005/07/12RIPE NCC
87.121.19.0/2487.121.19.0 - 87.121.19.2552005/07/12RIPE NCC
87.121.36.0/2387.121.36.0 - 87.121.37.2552005/07/12RIPE NCC
87.121.59.0/2487.121.59.0 - 87.121.59.2552005/07/12RIPE NCC
87.121.66.0/2387.121.66.0 - 87.121.67.2552005/07/12RIPE NCC
87.121.68.0/2487.121.68.0 - 87.121.68.2552005/07/12RIPE NCC
87.121.116.0/2487.121.116.0 - 87.121.116.2552005/07/12RIPE NCC
87.121.148.0/2387.121.148.0 - 87.121.149.2552005/07/12RIPE NCC
87.236.160.0/2487.236.160.0 - 87.236.160.2552021/08/19RIPE 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。

1-200 of 3162 rows
CIDR
2.32.0.0/12
2.56.92.0/22
2.56.128.0/22
2.57.32.0/22
2.57.84.0/22
2.58.93.0/24
2.58.94.0/24
2.58.128.0/22
2.58.136.0/22
2.58.184.0/22
2.58.208.0/22
2.59.4.0/22
2.59.16.0/22
2.59.140.0/22
2.59.228.0/22
2.59.248.0/22
2.112.0.0/13
2.156.0.0/14
2.192.0.0/13
2.224.0.0/12
5.1.42.0/24
5.1.44.0/24
5.2.0.0/20
5.8.96.0/19
5.11.32.0/21
5.11.96.0/19
5.23.32.0/21
5.28.8.0/21
5.34.184.0/21
5.42.144.0/21
5.43.232.0/21
5.43.248.0/21
5.56.8.0/21
5.57.208.0/24
5.61.0.0/21
5.61.192.0/21
5.61.216.0/21
5.62.72.0/21
5.63.17.0/24
5.63.136.0/21
5.63.168.0/21
5.77.64.0/18
5.83.104.0/21
5.83.120.0/21
5.84.0.0/14
5.88.0.0/13
5.96.0.0/14
5.100.232.0/21
5.102.0.0/19
5.104.24.0/21
5.133.32.0/21
5.133.48.0/20
5.133.96.0/22
5.133.114.0/24
5.134.120.0/21
5.144.160.0/20
5.144.184.0/21
5.145.120.0/21
5.150.128.0/20
5.152.128.0/22
5.152.144.0/22
5.152.148.0/23
5.152.154.0/23
5.152.156.0/22
5.152.240.0/21
5.154.192.0/19
5.154.237.0/24
5.154.238.0/24
5.157.96.0/19
5.158.64.0/20
5.168.0.0/14
5.172.64.0/18
5.172.208.0/21
5.175.32.0/21
5.175.48.0/21
5.175.64.0/20
5.178.40.0/21
5.178.88.0/21
5.178.120.0/21
5.179.128.0/18
5.180.68.0/22
5.180.108.0/22
5.180.112.0/23
5.180.115.0/24
5.180.168.0/22
5.180.204.0/22
5.180.236.0/22
5.181.68.0/22
5.181.144.0/22
5.181.160.0/24
5.181.192.0/22
5.182.68.0/22
5.182.240.0/22
5.183.108.0/22
5.198.224.0/20
5.249.128.0/19
5.252.16.0/22
5.252.44.0/22
5.252.84.0/22
5.252.240.0/22
5.253.48.0/22
5.253.196.0/22
5.253.212.0/22
31.3.160.0/19
31.6.80.0/20
31.7.144.0/20
31.10.48.0/21
31.11.32.0/21
31.12.8.0/21
31.12.73.0/24
31.13.136.0/21
31.13.194.0/24
31.13.210.0/24
31.13.249.0/24
31.13.250.0/23
31.13.252.0/22
31.14.28.0/24
31.14.128.0/20
31.14.163.0/24
31.14.183.0/24
31.14.184.0/21
31.14.233.0/24
31.15.72.0/21
31.15.96.0/21
31.24.136.0/21
31.25.32.0/21
31.26.0.0/15
31.31.40.0/21
31.44.16.0/20
31.44.112.0/20
31.44.160.0/20
31.129.125.0/24
31.131.240.0/21
31.132.40.0/22
31.132.48.0/22
31.156.0.0/14
31.169.104.0/21
31.170.40.0/21
31.171.136.0/21
31.177.40.0/21
31.177.112.0/21
31.185.16.0/21
31.185.96.0/21
31.186.40.0/21
31.187.104.0/21
31.188.0.0/14
31.193.16.0/20
31.193.56.0/21
31.193.144.0/20
31.194.0.0/15
31.196.0.0/14
31.207.96.0/19
31.214.153.0/24
31.216.128.0/22
31.216.152.0/21
31.216.240.0/20
31.217.200.0/21
31.223.240.0/20
37.9.224.0/20
37.10.80.0/20
37.32.80.0/20
37.32.104.0/21
37.34.32.0/20
37.34.72.0/21
37.60.32.0/21
37.61.228.0/24
37.72.32.0/21
37.77.96.0/21
37.77.112.0/20
37.77.136.0/21
37.77.160.0/21
37.77.208.0/20
37.99.208.0/21
37.99.224.0/19
37.100.0.0/14
37.114.8.0/21
37.116.0.0/14
37.123.240.0/21
37.128.136.0/21
37.130.152.0/21
37.130.216.0/21
37.139.88.0/21
37.140.218.0/24
37.148.224.0/21
37.153.135.0/24
37.156.96.0/22
37.156.148.0/22
37.156.168.0/22
37.156.174.0/24
37.156.208.0/22
37.156.244.0/24
37.159.0.0/16
37.176.0.0/13
37.186.128.0/17
37.200.80.0/22
37.202.16.0/21
37.203.224.0/20
37.205.128.0/17
37.206.0.0/15
37.209.200.0/21