IPv4 Subnet Calculator
Enter an IP with a CIDR prefix or a subnet mask to see its network, broadcast, host range, and host count. You can also split the network into smaller subnets.
private IP (RFC 1918)10.64.0.0/12
network10.64.0.0/12
broadcast10.79.255.255
first host10.64.0.1
last host10.79.255.254
subnet mask255.240.0.0
wildcard0.15.255.255
addresses1,048,576
usable hosts1,048,574
classA
ipcalc 10.64.0.0/12
address00001010.01000000.00000000.00000000
subnet mask11111111.11110000.00000000.00000000
network00001010.01000000.00000000.00000000
broadcast00001010.01001111.11111111.11111111
green = network part, grey = host part
hex0x0a400000
decimal171966464
reverse dns0.0.64.10.in-addr.arpa
ipv4-mapped::ffff:a40:0
/12 split into /21 · 512 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.64.0.0/21 | 10.64.0.1 – 10.64.7.254 | 10.64.7.255 |
| 2 | 10.64.8.0/21 | 10.64.8.1 – 10.64.15.254 | 10.64.15.255 |
| 3 | 10.64.16.0/21 | 10.64.16.1 – 10.64.23.254 | 10.64.23.255 |
| 4 | 10.64.24.0/21 | 10.64.24.1 – 10.64.31.254 | 10.64.31.255 |
| 5 | 10.64.32.0/21 | 10.64.32.1 – 10.64.39.254 | 10.64.39.255 |
| 6 | 10.64.40.0/21 | 10.64.40.1 – 10.64.47.254 | 10.64.47.255 |
| 7 | 10.64.48.0/21 | 10.64.48.1 – 10.64.55.254 | 10.64.55.255 |
| 8 | 10.64.56.0/21 | 10.64.56.1 – 10.64.63.254 | 10.64.63.255 |
| 9 | 10.64.64.0/21 | 10.64.64.1 – 10.64.71.254 | 10.64.71.255 |
| 10 | 10.64.72.0/21 | 10.64.72.1 – 10.64.79.254 | 10.64.79.255 |
| 11 | 10.64.80.0/21 | 10.64.80.1 – 10.64.87.254 | 10.64.87.255 |
| 12 | 10.64.88.0/21 | 10.64.88.1 – 10.64.95.254 | 10.64.95.255 |
| 13 | 10.64.96.0/21 | 10.64.96.1 – 10.64.103.254 | 10.64.103.255 |
| 14 | 10.64.104.0/21 | 10.64.104.1 – 10.64.111.254 | 10.64.111.255 |
| 15 | 10.64.112.0/21 | 10.64.112.1 – 10.64.119.254 | 10.64.119.255 |
| 16 | 10.64.120.0/21 | 10.64.120.1 – 10.64.127.254 | 10.64.127.255 |
| 17 | 10.64.128.0/21 | 10.64.128.1 – 10.64.135.254 | 10.64.135.255 |
| 18 | 10.64.136.0/21 | 10.64.136.1 – 10.64.143.254 | 10.64.143.255 |
| 19 | 10.64.144.0/21 | 10.64.144.1 – 10.64.151.254 | 10.64.151.255 |
| 20 | 10.64.152.0/21 | 10.64.152.1 – 10.64.159.254 | 10.64.159.255 |
| 21 | 10.64.160.0/21 | 10.64.160.1 – 10.64.167.254 | 10.64.167.255 |
| 22 | 10.64.168.0/21 | 10.64.168.1 – 10.64.175.254 | 10.64.175.255 |
| 23 | 10.64.176.0/21 | 10.64.176.1 – 10.64.183.254 | 10.64.183.255 |
| 24 | 10.64.184.0/21 | 10.64.184.1 – 10.64.191.254 | 10.64.191.255 |
| 25 | 10.64.192.0/21 | 10.64.192.1 – 10.64.199.254 | 10.64.199.255 |
| 26 | 10.64.200.0/21 | 10.64.200.1 – 10.64.207.254 | 10.64.207.255 |
| 27 | 10.64.208.0/21 | 10.64.208.1 – 10.64.215.254 | 10.64.215.255 |
| 28 | 10.64.216.0/21 | 10.64.216.1 – 10.64.223.254 | 10.64.223.255 |
| 29 | 10.64.224.0/21 | 10.64.224.1 – 10.64.231.254 | 10.64.231.255 |
| 30 | 10.64.232.0/21 | 10.64.232.1 – 10.64.239.254 | 10.64.239.255 |
| 31 | 10.64.240.0/21 | 10.64.240.1 – 10.64.247.254 | 10.64.247.255 |
| 32 | 10.64.248.0/21 | 10.64.248.1 – 10.64.255.254 | 10.64.255.255 |
| 33 | 10.65.0.0/21 | 10.65.0.1 – 10.65.7.254 | 10.65.7.255 |
| 34 | 10.65.8.0/21 | 10.65.8.1 – 10.65.15.254 | 10.65.15.255 |
| 35 | 10.65.16.0/21 | 10.65.16.1 – 10.65.23.254 | 10.65.23.255 |
| 36 | 10.65.24.0/21 | 10.65.24.1 – 10.65.31.254 | 10.65.31.255 |
| 37 | 10.65.32.0/21 | 10.65.32.1 – 10.65.39.254 | 10.65.39.255 |
| 38 | 10.65.40.0/21 | 10.65.40.1 – 10.65.47.254 | 10.65.47.255 |
| 39 | 10.65.48.0/21 | 10.65.48.1 – 10.65.55.254 | 10.65.55.255 |
| 40 | 10.65.56.0/21 | 10.65.56.1 – 10.65.63.254 | 10.65.63.255 |
| 41 | 10.65.64.0/21 | 10.65.64.1 – 10.65.71.254 | 10.65.71.255 |
| 42 | 10.65.72.0/21 | 10.65.72.1 – 10.65.79.254 | 10.65.79.255 |
| 43 | 10.65.80.0/21 | 10.65.80.1 – 10.65.87.254 | 10.65.87.255 |
| 44 | 10.65.88.0/21 | 10.65.88.1 – 10.65.95.254 | 10.65.95.255 |
| 45 | 10.65.96.0/21 | 10.65.96.1 – 10.65.103.254 | 10.65.103.255 |
| 46 | 10.65.104.0/21 | 10.65.104.1 – 10.65.111.254 | 10.65.111.255 |
| 47 | 10.65.112.0/21 | 10.65.112.1 – 10.65.119.254 | 10.65.119.255 |
| 48 | 10.65.120.0/21 | 10.65.120.1 – 10.65.127.254 | 10.65.127.255 |
| 49 | 10.65.128.0/21 | 10.65.128.1 – 10.65.135.254 | 10.65.135.255 |
| 50 | 10.65.136.0/21 | 10.65.136.1 – 10.65.143.254 | 10.65.143.255 |
| 51 | 10.65.144.0/21 | 10.65.144.1 – 10.65.151.254 | 10.65.151.255 |
| 52 | 10.65.152.0/21 | 10.65.152.1 – 10.65.159.254 | 10.65.159.255 |
| 53 | 10.65.160.0/21 | 10.65.160.1 – 10.65.167.254 | 10.65.167.255 |
| 54 | 10.65.168.0/21 | 10.65.168.1 – 10.65.175.254 | 10.65.175.255 |
| 55 | 10.65.176.0/21 | 10.65.176.1 – 10.65.183.254 | 10.65.183.255 |
| 56 | 10.65.184.0/21 | 10.65.184.1 – 10.65.191.254 | 10.65.191.255 |
| 57 | 10.65.192.0/21 | 10.65.192.1 – 10.65.199.254 | 10.65.199.255 |
| 58 | 10.65.200.0/21 | 10.65.200.1 – 10.65.207.254 | 10.65.207.255 |
| 59 | 10.65.208.0/21 | 10.65.208.1 – 10.65.215.254 | 10.65.215.255 |
| 60 | 10.65.216.0/21 | 10.65.216.1 – 10.65.223.254 | 10.65.223.255 |
| 61 | 10.65.224.0/21 | 10.65.224.1 – 10.65.231.254 | 10.65.231.255 |
| 62 | 10.65.232.0/21 | 10.65.232.1 – 10.65.239.254 | 10.65.239.255 |
| 63 | 10.65.240.0/21 | 10.65.240.1 – 10.65.247.254 | 10.65.247.255 |
| 64 | 10.65.248.0/21 | 10.65.248.1 – 10.65.255.254 | 10.65.255.255 |
| 65 | 10.66.0.0/21 | 10.66.0.1 – 10.66.7.254 | 10.66.7.255 |
| 66 | 10.66.8.0/21 | 10.66.8.1 – 10.66.15.254 | 10.66.15.255 |
| 67 | 10.66.16.0/21 | 10.66.16.1 – 10.66.23.254 | 10.66.23.255 |
| 68 | 10.66.24.0/21 | 10.66.24.1 – 10.66.31.254 | 10.66.31.255 |
| 69 | 10.66.32.0/21 | 10.66.32.1 – 10.66.39.254 | 10.66.39.255 |
| 70 | 10.66.40.0/21 | 10.66.40.1 – 10.66.47.254 | 10.66.47.255 |
| 71 | 10.66.48.0/21 | 10.66.48.1 – 10.66.55.254 | 10.66.55.255 |
| 72 | 10.66.56.0/21 | 10.66.56.1 – 10.66.63.254 | 10.66.63.255 |
| 73 | 10.66.64.0/21 | 10.66.64.1 – 10.66.71.254 | 10.66.71.255 |
| 74 | 10.66.72.0/21 | 10.66.72.1 – 10.66.79.254 | 10.66.79.255 |
| 75 | 10.66.80.0/21 | 10.66.80.1 – 10.66.87.254 | 10.66.87.255 |
| 76 | 10.66.88.0/21 | 10.66.88.1 – 10.66.95.254 | 10.66.95.255 |
| 77 | 10.66.96.0/21 | 10.66.96.1 – 10.66.103.254 | 10.66.103.255 |
| 78 | 10.66.104.0/21 | 10.66.104.1 – 10.66.111.254 | 10.66.111.255 |
| 79 | 10.66.112.0/21 | 10.66.112.1 – 10.66.119.254 | 10.66.119.255 |
| 80 | 10.66.120.0/21 | 10.66.120.1 – 10.66.127.254 | 10.66.127.255 |
| 81 | 10.66.128.0/21 | 10.66.128.1 – 10.66.135.254 | 10.66.135.255 |
| 82 | 10.66.136.0/21 | 10.66.136.1 – 10.66.143.254 | 10.66.143.255 |
| 83 | 10.66.144.0/21 | 10.66.144.1 – 10.66.151.254 | 10.66.151.255 |
| 84 | 10.66.152.0/21 | 10.66.152.1 – 10.66.159.254 | 10.66.159.255 |
| 85 | 10.66.160.0/21 | 10.66.160.1 – 10.66.167.254 | 10.66.167.255 |
| 86 | 10.66.168.0/21 | 10.66.168.1 – 10.66.175.254 | 10.66.175.255 |
| 87 | 10.66.176.0/21 | 10.66.176.1 – 10.66.183.254 | 10.66.183.255 |
| 88 | 10.66.184.0/21 | 10.66.184.1 – 10.66.191.254 | 10.66.191.255 |
| 89 | 10.66.192.0/21 | 10.66.192.1 – 10.66.199.254 | 10.66.199.255 |
| 90 | 10.66.200.0/21 | 10.66.200.1 – 10.66.207.254 | 10.66.207.255 |
| 91 | 10.66.208.0/21 | 10.66.208.1 – 10.66.215.254 | 10.66.215.255 |
| 92 | 10.66.216.0/21 | 10.66.216.1 – 10.66.223.254 | 10.66.223.255 |
| 93 | 10.66.224.0/21 | 10.66.224.1 – 10.66.231.254 | 10.66.231.255 |
| 94 | 10.66.232.0/21 | 10.66.232.1 – 10.66.239.254 | 10.66.239.255 |
| 95 | 10.66.240.0/21 | 10.66.240.1 – 10.66.247.254 | 10.66.247.255 |
| 96 | 10.66.248.0/21 | 10.66.248.1 – 10.66.255.254 | 10.66.255.255 |
| 97 | 10.67.0.0/21 | 10.67.0.1 – 10.67.7.254 | 10.67.7.255 |
| 98 | 10.67.8.0/21 | 10.67.8.1 – 10.67.15.254 | 10.67.15.255 |
| 99 | 10.67.16.0/21 | 10.67.16.1 – 10.67.23.254 | 10.67.23.255 |
| 100 | 10.67.24.0/21 | 10.67.24.1 – 10.67.31.254 | 10.67.31.255 |
| 101 | 10.67.32.0/21 | 10.67.32.1 – 10.67.39.254 | 10.67.39.255 |
| 102 | 10.67.40.0/21 | 10.67.40.1 – 10.67.47.254 | 10.67.47.255 |
| 103 | 10.67.48.0/21 | 10.67.48.1 – 10.67.55.254 | 10.67.55.255 |
| 104 | 10.67.56.0/21 | 10.67.56.1 – 10.67.63.254 | 10.67.63.255 |
| 105 | 10.67.64.0/21 | 10.67.64.1 – 10.67.71.254 | 10.67.71.255 |
| 106 | 10.67.72.0/21 | 10.67.72.1 – 10.67.79.254 | 10.67.79.255 |
| 107 | 10.67.80.0/21 | 10.67.80.1 – 10.67.87.254 | 10.67.87.255 |
| 108 | 10.67.88.0/21 | 10.67.88.1 – 10.67.95.254 | 10.67.95.255 |
| 109 | 10.67.96.0/21 | 10.67.96.1 – 10.67.103.254 | 10.67.103.255 |
| 110 | 10.67.104.0/21 | 10.67.104.1 – 10.67.111.254 | 10.67.111.255 |
| 111 | 10.67.112.0/21 | 10.67.112.1 – 10.67.119.254 | 10.67.119.255 |
| 112 | 10.67.120.0/21 | 10.67.120.1 – 10.67.127.254 | 10.67.127.255 |
| 113 | 10.67.128.0/21 | 10.67.128.1 – 10.67.135.254 | 10.67.135.255 |
| 114 | 10.67.136.0/21 | 10.67.136.1 – 10.67.143.254 | 10.67.143.255 |
| 115 | 10.67.144.0/21 | 10.67.144.1 – 10.67.151.254 | 10.67.151.255 |
| 116 | 10.67.152.0/21 | 10.67.152.1 – 10.67.159.254 | 10.67.159.255 |
| 117 | 10.67.160.0/21 | 10.67.160.1 – 10.67.167.254 | 10.67.167.255 |
| 118 | 10.67.168.0/21 | 10.67.168.1 – 10.67.175.254 | 10.67.175.255 |
| 119 | 10.67.176.0/21 | 10.67.176.1 – 10.67.183.254 | 10.67.183.255 |
| 120 | 10.67.184.0/21 | 10.67.184.1 – 10.67.191.254 | 10.67.191.255 |
| 121 | 10.67.192.0/21 | 10.67.192.1 – 10.67.199.254 | 10.67.199.255 |
| 122 | 10.67.200.0/21 | 10.67.200.1 – 10.67.207.254 | 10.67.207.255 |
| 123 | 10.67.208.0/21 | 10.67.208.1 – 10.67.215.254 | 10.67.215.255 |
| 124 | 10.67.216.0/21 | 10.67.216.1 – 10.67.223.254 | 10.67.223.255 |
| 125 | 10.67.224.0/21 | 10.67.224.1 – 10.67.231.254 | 10.67.231.255 |
| 126 | 10.67.232.0/21 | 10.67.232.1 – 10.67.239.254 | 10.67.239.255 |
| 127 | 10.67.240.0/21 | 10.67.240.1 – 10.67.247.254 | 10.67.247.255 |
| 128 | 10.67.248.0/21 | 10.67.248.1 – 10.67.255.254 | 10.67.255.255 |
| 129 | 10.68.0.0/21 | 10.68.0.1 – 10.68.7.254 | 10.68.7.255 |
| 130 | 10.68.8.0/21 | 10.68.8.1 – 10.68.15.254 | 10.68.15.255 |
| 131 | 10.68.16.0/21 | 10.68.16.1 – 10.68.23.254 | 10.68.23.255 |
| 132 | 10.68.24.0/21 | 10.68.24.1 – 10.68.31.254 | 10.68.31.255 |
| 133 | 10.68.32.0/21 | 10.68.32.1 – 10.68.39.254 | 10.68.39.255 |
| 134 | 10.68.40.0/21 | 10.68.40.1 – 10.68.47.254 | 10.68.47.255 |
| 135 | 10.68.48.0/21 | 10.68.48.1 – 10.68.55.254 | 10.68.55.255 |
| 136 | 10.68.56.0/21 | 10.68.56.1 – 10.68.63.254 | 10.68.63.255 |
| 137 | 10.68.64.0/21 | 10.68.64.1 – 10.68.71.254 | 10.68.71.255 |
| 138 | 10.68.72.0/21 | 10.68.72.1 – 10.68.79.254 | 10.68.79.255 |
| 139 | 10.68.80.0/21 | 10.68.80.1 – 10.68.87.254 | 10.68.87.255 |
| 140 | 10.68.88.0/21 | 10.68.88.1 – 10.68.95.254 | 10.68.95.255 |
| 141 | 10.68.96.0/21 | 10.68.96.1 – 10.68.103.254 | 10.68.103.255 |
| 142 | 10.68.104.0/21 | 10.68.104.1 – 10.68.111.254 | 10.68.111.255 |
| 143 | 10.68.112.0/21 | 10.68.112.1 – 10.68.119.254 | 10.68.119.255 |
| 144 | 10.68.120.0/21 | 10.68.120.1 – 10.68.127.254 | 10.68.127.255 |
| 145 | 10.68.128.0/21 | 10.68.128.1 – 10.68.135.254 | 10.68.135.255 |
| 146 | 10.68.136.0/21 | 10.68.136.1 – 10.68.143.254 | 10.68.143.255 |
| 147 | 10.68.144.0/21 | 10.68.144.1 – 10.68.151.254 | 10.68.151.255 |
| 148 | 10.68.152.0/21 | 10.68.152.1 – 10.68.159.254 | 10.68.159.255 |
| 149 | 10.68.160.0/21 | 10.68.160.1 – 10.68.167.254 | 10.68.167.255 |
| 150 | 10.68.168.0/21 | 10.68.168.1 – 10.68.175.254 | 10.68.175.255 |
| 151 | 10.68.176.0/21 | 10.68.176.1 – 10.68.183.254 | 10.68.183.255 |
| 152 | 10.68.184.0/21 | 10.68.184.1 – 10.68.191.254 | 10.68.191.255 |
| 153 | 10.68.192.0/21 | 10.68.192.1 – 10.68.199.254 | 10.68.199.255 |
| 154 | 10.68.200.0/21 | 10.68.200.1 – 10.68.207.254 | 10.68.207.255 |
| 155 | 10.68.208.0/21 | 10.68.208.1 – 10.68.215.254 | 10.68.215.255 |
| 156 | 10.68.216.0/21 | 10.68.216.1 – 10.68.223.254 | 10.68.223.255 |
| 157 | 10.68.224.0/21 | 10.68.224.1 – 10.68.231.254 | 10.68.231.255 |
| 158 | 10.68.232.0/21 | 10.68.232.1 – 10.68.239.254 | 10.68.239.255 |
| 159 | 10.68.240.0/21 | 10.68.240.1 – 10.68.247.254 | 10.68.247.255 |
| 160 | 10.68.248.0/21 | 10.68.248.1 – 10.68.255.254 | 10.68.255.255 |
| 161 | 10.69.0.0/21 | 10.69.0.1 – 10.69.7.254 | 10.69.7.255 |
| 162 | 10.69.8.0/21 | 10.69.8.1 – 10.69.15.254 | 10.69.15.255 |
| 163 | 10.69.16.0/21 | 10.69.16.1 – 10.69.23.254 | 10.69.23.255 |
| 164 | 10.69.24.0/21 | 10.69.24.1 – 10.69.31.254 | 10.69.31.255 |
| 165 | 10.69.32.0/21 | 10.69.32.1 – 10.69.39.254 | 10.69.39.255 |
| 166 | 10.69.40.0/21 | 10.69.40.1 – 10.69.47.254 | 10.69.47.255 |
| 167 | 10.69.48.0/21 | 10.69.48.1 – 10.69.55.254 | 10.69.55.255 |
| 168 | 10.69.56.0/21 | 10.69.56.1 – 10.69.63.254 | 10.69.63.255 |
| 169 | 10.69.64.0/21 | 10.69.64.1 – 10.69.71.254 | 10.69.71.255 |
| 170 | 10.69.72.0/21 | 10.69.72.1 – 10.69.79.254 | 10.69.79.255 |
| 171 | 10.69.80.0/21 | 10.69.80.1 – 10.69.87.254 | 10.69.87.255 |
| 172 | 10.69.88.0/21 | 10.69.88.1 – 10.69.95.254 | 10.69.95.255 |
| 173 | 10.69.96.0/21 | 10.69.96.1 – 10.69.103.254 | 10.69.103.255 |
| 174 | 10.69.104.0/21 | 10.69.104.1 – 10.69.111.254 | 10.69.111.255 |
| 175 | 10.69.112.0/21 | 10.69.112.1 – 10.69.119.254 | 10.69.119.255 |
| 176 | 10.69.120.0/21 | 10.69.120.1 – 10.69.127.254 | 10.69.127.255 |
| 177 | 10.69.128.0/21 | 10.69.128.1 – 10.69.135.254 | 10.69.135.255 |
| 178 | 10.69.136.0/21 | 10.69.136.1 – 10.69.143.254 | 10.69.143.255 |
| 179 | 10.69.144.0/21 | 10.69.144.1 – 10.69.151.254 | 10.69.151.255 |
| 180 | 10.69.152.0/21 | 10.69.152.1 – 10.69.159.254 | 10.69.159.255 |
| 181 | 10.69.160.0/21 | 10.69.160.1 – 10.69.167.254 | 10.69.167.255 |
| 182 | 10.69.168.0/21 | 10.69.168.1 – 10.69.175.254 | 10.69.175.255 |
| 183 | 10.69.176.0/21 | 10.69.176.1 – 10.69.183.254 | 10.69.183.255 |
| 184 | 10.69.184.0/21 | 10.69.184.1 – 10.69.191.254 | 10.69.191.255 |
| 185 | 10.69.192.0/21 | 10.69.192.1 – 10.69.199.254 | 10.69.199.255 |
| 186 | 10.69.200.0/21 | 10.69.200.1 – 10.69.207.254 | 10.69.207.255 |
| 187 | 10.69.208.0/21 | 10.69.208.1 – 10.69.215.254 | 10.69.215.255 |
| 188 | 10.69.216.0/21 | 10.69.216.1 – 10.69.223.254 | 10.69.223.255 |
| 189 | 10.69.224.0/21 | 10.69.224.1 – 10.69.231.254 | 10.69.231.255 |
| 190 | 10.69.232.0/21 | 10.69.232.1 – 10.69.239.254 | 10.69.239.255 |
| 191 | 10.69.240.0/21 | 10.69.240.1 – 10.69.247.254 | 10.69.247.255 |
| 192 | 10.69.248.0/21 | 10.69.248.1 – 10.69.255.254 | 10.69.255.255 |
| 193 | 10.70.0.0/21 | 10.70.0.1 – 10.70.7.254 | 10.70.7.255 |
| 194 | 10.70.8.0/21 | 10.70.8.1 – 10.70.15.254 | 10.70.15.255 |
| 195 | 10.70.16.0/21 | 10.70.16.1 – 10.70.23.254 | 10.70.23.255 |
| 196 | 10.70.24.0/21 | 10.70.24.1 – 10.70.31.254 | 10.70.31.255 |
| 197 | 10.70.32.0/21 | 10.70.32.1 – 10.70.39.254 | 10.70.39.255 |
| 198 | 10.70.40.0/21 | 10.70.40.1 – 10.70.47.254 | 10.70.47.255 |
| 199 | 10.70.48.0/21 | 10.70.48.1 – 10.70.55.254 | 10.70.55.255 |
| 200 | 10.70.56.0/21 | 10.70.56.1 – 10.70.63.254 | 10.70.63.255 |
| 201 | 10.70.64.0/21 | 10.70.64.1 – 10.70.71.254 | 10.70.71.255 |
| 202 | 10.70.72.0/21 | 10.70.72.1 – 10.70.79.254 | 10.70.79.255 |
| 203 | 10.70.80.0/21 | 10.70.80.1 – 10.70.87.254 | 10.70.87.255 |
| 204 | 10.70.88.0/21 | 10.70.88.1 – 10.70.95.254 | 10.70.95.255 |
| 205 | 10.70.96.0/21 | 10.70.96.1 – 10.70.103.254 | 10.70.103.255 |
| 206 | 10.70.104.0/21 | 10.70.104.1 – 10.70.111.254 | 10.70.111.255 |
| 207 | 10.70.112.0/21 | 10.70.112.1 – 10.70.119.254 | 10.70.119.255 |
| 208 | 10.70.120.0/21 | 10.70.120.1 – 10.70.127.254 | 10.70.127.255 |
| 209 | 10.70.128.0/21 | 10.70.128.1 – 10.70.135.254 | 10.70.135.255 |
| 210 | 10.70.136.0/21 | 10.70.136.1 – 10.70.143.254 | 10.70.143.255 |
| 211 | 10.70.144.0/21 | 10.70.144.1 – 10.70.151.254 | 10.70.151.255 |
| 212 | 10.70.152.0/21 | 10.70.152.1 – 10.70.159.254 | 10.70.159.255 |
| 213 | 10.70.160.0/21 | 10.70.160.1 – 10.70.167.254 | 10.70.167.255 |
| 214 | 10.70.168.0/21 | 10.70.168.1 – 10.70.175.254 | 10.70.175.255 |
| 215 | 10.70.176.0/21 | 10.70.176.1 – 10.70.183.254 | 10.70.183.255 |
| 216 | 10.70.184.0/21 | 10.70.184.1 – 10.70.191.254 | 10.70.191.255 |
| 217 | 10.70.192.0/21 | 10.70.192.1 – 10.70.199.254 | 10.70.199.255 |
| 218 | 10.70.200.0/21 | 10.70.200.1 – 10.70.207.254 | 10.70.207.255 |
| 219 | 10.70.208.0/21 | 10.70.208.1 – 10.70.215.254 | 10.70.215.255 |
| 220 | 10.70.216.0/21 | 10.70.216.1 – 10.70.223.254 | 10.70.223.255 |
| 221 | 10.70.224.0/21 | 10.70.224.1 – 10.70.231.254 | 10.70.231.255 |
| 222 | 10.70.232.0/21 | 10.70.232.1 – 10.70.239.254 | 10.70.239.255 |
| 223 | 10.70.240.0/21 | 10.70.240.1 – 10.70.247.254 | 10.70.247.255 |
| 224 | 10.70.248.0/21 | 10.70.248.1 – 10.70.255.254 | 10.70.255.255 |
| 225 | 10.71.0.0/21 | 10.71.0.1 – 10.71.7.254 | 10.71.7.255 |
| 226 | 10.71.8.0/21 | 10.71.8.1 – 10.71.15.254 | 10.71.15.255 |
| 227 | 10.71.16.0/21 | 10.71.16.1 – 10.71.23.254 | 10.71.23.255 |
| 228 | 10.71.24.0/21 | 10.71.24.1 – 10.71.31.254 | 10.71.31.255 |
| 229 | 10.71.32.0/21 | 10.71.32.1 – 10.71.39.254 | 10.71.39.255 |
| 230 | 10.71.40.0/21 | 10.71.40.1 – 10.71.47.254 | 10.71.47.255 |
| 231 | 10.71.48.0/21 | 10.71.48.1 – 10.71.55.254 | 10.71.55.255 |
| 232 | 10.71.56.0/21 | 10.71.56.1 – 10.71.63.254 | 10.71.63.255 |
| 233 | 10.71.64.0/21 | 10.71.64.1 – 10.71.71.254 | 10.71.71.255 |
| 234 | 10.71.72.0/21 | 10.71.72.1 – 10.71.79.254 | 10.71.79.255 |
| 235 | 10.71.80.0/21 | 10.71.80.1 – 10.71.87.254 | 10.71.87.255 |
| 236 | 10.71.88.0/21 | 10.71.88.1 – 10.71.95.254 | 10.71.95.255 |
| 237 | 10.71.96.0/21 | 10.71.96.1 – 10.71.103.254 | 10.71.103.255 |
| 238 | 10.71.104.0/21 | 10.71.104.1 – 10.71.111.254 | 10.71.111.255 |
| 239 | 10.71.112.0/21 | 10.71.112.1 – 10.71.119.254 | 10.71.119.255 |
| 240 | 10.71.120.0/21 | 10.71.120.1 – 10.71.127.254 | 10.71.127.255 |
| 241 | 10.71.128.0/21 | 10.71.128.1 – 10.71.135.254 | 10.71.135.255 |
| 242 | 10.71.136.0/21 | 10.71.136.1 – 10.71.143.254 | 10.71.143.255 |
| 243 | 10.71.144.0/21 | 10.71.144.1 – 10.71.151.254 | 10.71.151.255 |
| 244 | 10.71.152.0/21 | 10.71.152.1 – 10.71.159.254 | 10.71.159.255 |
| 245 | 10.71.160.0/21 | 10.71.160.1 – 10.71.167.254 | 10.71.167.255 |
| 246 | 10.71.168.0/21 | 10.71.168.1 – 10.71.175.254 | 10.71.175.255 |
| 247 | 10.71.176.0/21 | 10.71.176.1 – 10.71.183.254 | 10.71.183.255 |
| 248 | 10.71.184.0/21 | 10.71.184.1 – 10.71.191.254 | 10.71.191.255 |
| 249 | 10.71.192.0/21 | 10.71.192.1 – 10.71.199.254 | 10.71.199.255 |
| 250 | 10.71.200.0/21 | 10.71.200.1 – 10.71.207.254 | 10.71.207.255 |
| 251 | 10.71.208.0/21 | 10.71.208.1 – 10.71.215.254 | 10.71.215.255 |
| 252 | 10.71.216.0/21 | 10.71.216.1 – 10.71.223.254 | 10.71.223.255 |
| 253 | 10.71.224.0/21 | 10.71.224.1 – 10.71.231.254 | 10.71.231.255 |
| 254 | 10.71.232.0/21 | 10.71.232.1 – 10.71.239.254 | 10.71.239.255 |
| 255 | 10.71.240.0/21 | 10.71.240.1 – 10.71.247.254 | 10.71.247.255 |
| 256 | 10.71.248.0/21 | 10.71.248.1 – 10.71.255.254 | 10.71.255.255 |
showing 256 of 512
01 / table
IPv4 CIDR prefix table.
Click a prefix longer than your network to split it into subnets.
| prefix | subnet mask | addresses | hosts | in your /12 |
|---|---|---|---|---|
| /0 | 0.0.0.0 | 4,294,967,296 | 4,294,967,294 | - |
| /1 | 128.0.0.0 | 2,147,483,648 | 2,147,483,646 | - |
| /2 | 192.0.0.0 | 1,073,741,824 | 1,073,741,822 | - |
| /3 | 224.0.0.0 | 536,870,912 | 536,870,910 | - |
| /4 | 240.0.0.0 | 268,435,456 | 268,435,454 | - |
| /5 | 248.0.0.0 | 134,217,728 | 134,217,726 | - |
| /6 | 252.0.0.0 | 67,108,864 | 67,108,862 | - |
| /7 | 254.0.0.0 | 33,554,432 | 33,554,430 | - |
| /8 | 255.0.0.0 | 16,777,216 | 16,777,214 | - |
| /9 | 255.128.0.0 | 8,388,608 | 8,388,606 | - |
| /10 | 255.192.0.0 | 4,194,304 | 4,194,302 | - |
| /11 | 255.224.0.0 | 2,097,152 | 2,097,150 | - |
| /12 | 255.240.0.0 | 1,048,576 | 1,048,574 | 1 |
| /13 | 255.248.0.0 | 524,288 | 524,286 | 2 split → |
| /14 | 255.252.0.0 | 262,144 | 262,142 | 4 split → |
| /15 | 255.254.0.0 | 131,072 | 131,070 | 8 split → |
| /16 | 255.255.0.0 | 65,536 | 65,534 | 16 split → |
| /17 | 255.255.128.0 | 32,768 | 32,766 | 32 split → |
| /18 | 255.255.192.0 | 16,384 | 16,382 | 64 split → |
| /19 | 255.255.224.0 | 8,192 | 8,190 | 128 split → |
| /20 | 255.255.240.0 | 4,096 | 4,094 | 256 split → |
| /21 | 255.255.248.0 | 2,048 | 2,046 | 512 split → |
| /22 | 255.255.252.0 | 1,024 | 1,022 | 1,024 split → |
| /23 | 255.255.254.0 | 512 | 510 | 2,048 split → |
| /24 | 255.255.255.0 | 256 | 254 | 4,096 split → |
| /25 | 255.255.255.128 | 128 | 126 | 8,192 split → |
| /26 | 255.255.255.192 | 64 | 62 | 16,384 split → |
| /27 | 255.255.255.224 | 32 | 30 | 32,768 split → |
| /28 | 255.255.255.240 | 16 | 14 | 65,536 split → |
| /29 | 255.255.255.248 | 8 | 6 | 131,072 split → |
| /30 | 255.255.255.252 | 4 | 2 | 262,144 split → |
| /31 | 255.255.255.254 | 2 | 2 | 524,288 split → |
| /32 | 255.255.255.255 | 1 | 1 | 1,048,576 split → |
02 / faq
About this calculator.
How do I use this subnet calculator?
▼
Type an IP address followed by a prefix, like 192.168.1.10/24, or by a subnet mask, like 192.168.1.10 255.255.255.0. Without a prefix it uses /24. Click a row in the table to split the network into smaller subnets.
Why are usable hosts always 2 fewer?
▼
The first address in a subnet is the network address and the last is the broadcast address, so neither can go to a device. The exceptions are /31 (point-to-point links, RFC 3021) and /32 (a single address), which use every address.
Can I use it from a terminal?
▼
Yes. curl 'ipku.in/en/tools/ipv4-subnet-calculator?q=192.168.1.10/24' returns the result as plain text.