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)10.16.0.0/12
network10.16.0.0/12
broadcast10.31.255.255
first host10.16.0.1
last host10.31.255.254
subnet mask255.240.0.0
wildcard0.15.255.255
addresses1,048,576
usable hosts1,048,574
classA
ipcalc 10.16.0.0/12
address00001010.00010000.00000000.00000000
subnet mask11111111.11110000.00000000.00000000
network00001010.00010000.00000000.00000000
broadcast00001010.00011111.11111111.11111111
green = network part, grey = host part
hex0x0a100000
decimal168820736
reverse dns0.0.16.10.in-addr.arpa
ipv4-mapped::ffff:a10:0
/12 split into /20 · 256 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.16.0.0/20 | 10.16.0.1 – 10.16.15.254 | 10.16.15.255 |
| 2 | 10.16.16.0/20 | 10.16.16.1 – 10.16.31.254 | 10.16.31.255 |
| 3 | 10.16.32.0/20 | 10.16.32.1 – 10.16.47.254 | 10.16.47.255 |
| 4 | 10.16.48.0/20 | 10.16.48.1 – 10.16.63.254 | 10.16.63.255 |
| 5 | 10.16.64.0/20 | 10.16.64.1 – 10.16.79.254 | 10.16.79.255 |
| 6 | 10.16.80.0/20 | 10.16.80.1 – 10.16.95.254 | 10.16.95.255 |
| 7 | 10.16.96.0/20 | 10.16.96.1 – 10.16.111.254 | 10.16.111.255 |
| 8 | 10.16.112.0/20 | 10.16.112.1 – 10.16.127.254 | 10.16.127.255 |
| 9 | 10.16.128.0/20 | 10.16.128.1 – 10.16.143.254 | 10.16.143.255 |
| 10 | 10.16.144.0/20 | 10.16.144.1 – 10.16.159.254 | 10.16.159.255 |
| 11 | 10.16.160.0/20 | 10.16.160.1 – 10.16.175.254 | 10.16.175.255 |
| 12 | 10.16.176.0/20 | 10.16.176.1 – 10.16.191.254 | 10.16.191.255 |
| 13 | 10.16.192.0/20 | 10.16.192.1 – 10.16.207.254 | 10.16.207.255 |
| 14 | 10.16.208.0/20 | 10.16.208.1 – 10.16.223.254 | 10.16.223.255 |
| 15 | 10.16.224.0/20 | 10.16.224.1 – 10.16.239.254 | 10.16.239.255 |
| 16 | 10.16.240.0/20 | 10.16.240.1 – 10.16.255.254 | 10.16.255.255 |
| 17 | 10.17.0.0/20 | 10.17.0.1 – 10.17.15.254 | 10.17.15.255 |
| 18 | 10.17.16.0/20 | 10.17.16.1 – 10.17.31.254 | 10.17.31.255 |
| 19 | 10.17.32.0/20 | 10.17.32.1 – 10.17.47.254 | 10.17.47.255 |
| 20 | 10.17.48.0/20 | 10.17.48.1 – 10.17.63.254 | 10.17.63.255 |
| 21 | 10.17.64.0/20 | 10.17.64.1 – 10.17.79.254 | 10.17.79.255 |
| 22 | 10.17.80.0/20 | 10.17.80.1 – 10.17.95.254 | 10.17.95.255 |
| 23 | 10.17.96.0/20 | 10.17.96.1 – 10.17.111.254 | 10.17.111.255 |
| 24 | 10.17.112.0/20 | 10.17.112.1 – 10.17.127.254 | 10.17.127.255 |
| 25 | 10.17.128.0/20 | 10.17.128.1 – 10.17.143.254 | 10.17.143.255 |
| 26 | 10.17.144.0/20 | 10.17.144.1 – 10.17.159.254 | 10.17.159.255 |
| 27 | 10.17.160.0/20 | 10.17.160.1 – 10.17.175.254 | 10.17.175.255 |
| 28 | 10.17.176.0/20 | 10.17.176.1 – 10.17.191.254 | 10.17.191.255 |
| 29 | 10.17.192.0/20 | 10.17.192.1 – 10.17.207.254 | 10.17.207.255 |
| 30 | 10.17.208.0/20 | 10.17.208.1 – 10.17.223.254 | 10.17.223.255 |
| 31 | 10.17.224.0/20 | 10.17.224.1 – 10.17.239.254 | 10.17.239.255 |
| 32 | 10.17.240.0/20 | 10.17.240.1 – 10.17.255.254 | 10.17.255.255 |
| 33 | 10.18.0.0/20 | 10.18.0.1 – 10.18.15.254 | 10.18.15.255 |
| 34 | 10.18.16.0/20 | 10.18.16.1 – 10.18.31.254 | 10.18.31.255 |
| 35 | 10.18.32.0/20 | 10.18.32.1 – 10.18.47.254 | 10.18.47.255 |
| 36 | 10.18.48.0/20 | 10.18.48.1 – 10.18.63.254 | 10.18.63.255 |
| 37 | 10.18.64.0/20 | 10.18.64.1 – 10.18.79.254 | 10.18.79.255 |
| 38 | 10.18.80.0/20 | 10.18.80.1 – 10.18.95.254 | 10.18.95.255 |
| 39 | 10.18.96.0/20 | 10.18.96.1 – 10.18.111.254 | 10.18.111.255 |
| 40 | 10.18.112.0/20 | 10.18.112.1 – 10.18.127.254 | 10.18.127.255 |
| 41 | 10.18.128.0/20 | 10.18.128.1 – 10.18.143.254 | 10.18.143.255 |
| 42 | 10.18.144.0/20 | 10.18.144.1 – 10.18.159.254 | 10.18.159.255 |
| 43 | 10.18.160.0/20 | 10.18.160.1 – 10.18.175.254 | 10.18.175.255 |
| 44 | 10.18.176.0/20 | 10.18.176.1 – 10.18.191.254 | 10.18.191.255 |
| 45 | 10.18.192.0/20 | 10.18.192.1 – 10.18.207.254 | 10.18.207.255 |
| 46 | 10.18.208.0/20 | 10.18.208.1 – 10.18.223.254 | 10.18.223.255 |
| 47 | 10.18.224.0/20 | 10.18.224.1 – 10.18.239.254 | 10.18.239.255 |
| 48 | 10.18.240.0/20 | 10.18.240.1 – 10.18.255.254 | 10.18.255.255 |
| 49 | 10.19.0.0/20 | 10.19.0.1 – 10.19.15.254 | 10.19.15.255 |
| 50 | 10.19.16.0/20 | 10.19.16.1 – 10.19.31.254 | 10.19.31.255 |
| 51 | 10.19.32.0/20 | 10.19.32.1 – 10.19.47.254 | 10.19.47.255 |
| 52 | 10.19.48.0/20 | 10.19.48.1 – 10.19.63.254 | 10.19.63.255 |
| 53 | 10.19.64.0/20 | 10.19.64.1 – 10.19.79.254 | 10.19.79.255 |
| 54 | 10.19.80.0/20 | 10.19.80.1 – 10.19.95.254 | 10.19.95.255 |
| 55 | 10.19.96.0/20 | 10.19.96.1 – 10.19.111.254 | 10.19.111.255 |
| 56 | 10.19.112.0/20 | 10.19.112.1 – 10.19.127.254 | 10.19.127.255 |
| 57 | 10.19.128.0/20 | 10.19.128.1 – 10.19.143.254 | 10.19.143.255 |
| 58 | 10.19.144.0/20 | 10.19.144.1 – 10.19.159.254 | 10.19.159.255 |
| 59 | 10.19.160.0/20 | 10.19.160.1 – 10.19.175.254 | 10.19.175.255 |
| 60 | 10.19.176.0/20 | 10.19.176.1 – 10.19.191.254 | 10.19.191.255 |
| 61 | 10.19.192.0/20 | 10.19.192.1 – 10.19.207.254 | 10.19.207.255 |
| 62 | 10.19.208.0/20 | 10.19.208.1 – 10.19.223.254 | 10.19.223.255 |
| 63 | 10.19.224.0/20 | 10.19.224.1 – 10.19.239.254 | 10.19.239.255 |
| 64 | 10.19.240.0/20 | 10.19.240.1 – 10.19.255.254 | 10.19.255.255 |
| 65 | 10.20.0.0/20 | 10.20.0.1 – 10.20.15.254 | 10.20.15.255 |
| 66 | 10.20.16.0/20 | 10.20.16.1 – 10.20.31.254 | 10.20.31.255 |
| 67 | 10.20.32.0/20 | 10.20.32.1 – 10.20.47.254 | 10.20.47.255 |
| 68 | 10.20.48.0/20 | 10.20.48.1 – 10.20.63.254 | 10.20.63.255 |
| 69 | 10.20.64.0/20 | 10.20.64.1 – 10.20.79.254 | 10.20.79.255 |
| 70 | 10.20.80.0/20 | 10.20.80.1 – 10.20.95.254 | 10.20.95.255 |
| 71 | 10.20.96.0/20 | 10.20.96.1 – 10.20.111.254 | 10.20.111.255 |
| 72 | 10.20.112.0/20 | 10.20.112.1 – 10.20.127.254 | 10.20.127.255 |
| 73 | 10.20.128.0/20 | 10.20.128.1 – 10.20.143.254 | 10.20.143.255 |
| 74 | 10.20.144.0/20 | 10.20.144.1 – 10.20.159.254 | 10.20.159.255 |
| 75 | 10.20.160.0/20 | 10.20.160.1 – 10.20.175.254 | 10.20.175.255 |
| 76 | 10.20.176.0/20 | 10.20.176.1 – 10.20.191.254 | 10.20.191.255 |
| 77 | 10.20.192.0/20 | 10.20.192.1 – 10.20.207.254 | 10.20.207.255 |
| 78 | 10.20.208.0/20 | 10.20.208.1 – 10.20.223.254 | 10.20.223.255 |
| 79 | 10.20.224.0/20 | 10.20.224.1 – 10.20.239.254 | 10.20.239.255 |
| 80 | 10.20.240.0/20 | 10.20.240.1 – 10.20.255.254 | 10.20.255.255 |
| 81 | 10.21.0.0/20 | 10.21.0.1 – 10.21.15.254 | 10.21.15.255 |
| 82 | 10.21.16.0/20 | 10.21.16.1 – 10.21.31.254 | 10.21.31.255 |
| 83 | 10.21.32.0/20 | 10.21.32.1 – 10.21.47.254 | 10.21.47.255 |
| 84 | 10.21.48.0/20 | 10.21.48.1 – 10.21.63.254 | 10.21.63.255 |
| 85 | 10.21.64.0/20 | 10.21.64.1 – 10.21.79.254 | 10.21.79.255 |
| 86 | 10.21.80.0/20 | 10.21.80.1 – 10.21.95.254 | 10.21.95.255 |
| 87 | 10.21.96.0/20 | 10.21.96.1 – 10.21.111.254 | 10.21.111.255 |
| 88 | 10.21.112.0/20 | 10.21.112.1 – 10.21.127.254 | 10.21.127.255 |
| 89 | 10.21.128.0/20 | 10.21.128.1 – 10.21.143.254 | 10.21.143.255 |
| 90 | 10.21.144.0/20 | 10.21.144.1 – 10.21.159.254 | 10.21.159.255 |
| 91 | 10.21.160.0/20 | 10.21.160.1 – 10.21.175.254 | 10.21.175.255 |
| 92 | 10.21.176.0/20 | 10.21.176.1 – 10.21.191.254 | 10.21.191.255 |
| 93 | 10.21.192.0/20 | 10.21.192.1 – 10.21.207.254 | 10.21.207.255 |
| 94 | 10.21.208.0/20 | 10.21.208.1 – 10.21.223.254 | 10.21.223.255 |
| 95 | 10.21.224.0/20 | 10.21.224.1 – 10.21.239.254 | 10.21.239.255 |
| 96 | 10.21.240.0/20 | 10.21.240.1 – 10.21.255.254 | 10.21.255.255 |
| 97 | 10.22.0.0/20 | 10.22.0.1 – 10.22.15.254 | 10.22.15.255 |
| 98 | 10.22.16.0/20 | 10.22.16.1 – 10.22.31.254 | 10.22.31.255 |
| 99 | 10.22.32.0/20 | 10.22.32.1 – 10.22.47.254 | 10.22.47.255 |
| 100 | 10.22.48.0/20 | 10.22.48.1 – 10.22.63.254 | 10.22.63.255 |
| 101 | 10.22.64.0/20 | 10.22.64.1 – 10.22.79.254 | 10.22.79.255 |
| 102 | 10.22.80.0/20 | 10.22.80.1 – 10.22.95.254 | 10.22.95.255 |
| 103 | 10.22.96.0/20 | 10.22.96.1 – 10.22.111.254 | 10.22.111.255 |
| 104 | 10.22.112.0/20 | 10.22.112.1 – 10.22.127.254 | 10.22.127.255 |
| 105 | 10.22.128.0/20 | 10.22.128.1 – 10.22.143.254 | 10.22.143.255 |
| 106 | 10.22.144.0/20 | 10.22.144.1 – 10.22.159.254 | 10.22.159.255 |
| 107 | 10.22.160.0/20 | 10.22.160.1 – 10.22.175.254 | 10.22.175.255 |
| 108 | 10.22.176.0/20 | 10.22.176.1 – 10.22.191.254 | 10.22.191.255 |
| 109 | 10.22.192.0/20 | 10.22.192.1 – 10.22.207.254 | 10.22.207.255 |
| 110 | 10.22.208.0/20 | 10.22.208.1 – 10.22.223.254 | 10.22.223.255 |
| 111 | 10.22.224.0/20 | 10.22.224.1 – 10.22.239.254 | 10.22.239.255 |
| 112 | 10.22.240.0/20 | 10.22.240.1 – 10.22.255.254 | 10.22.255.255 |
| 113 | 10.23.0.0/20 | 10.23.0.1 – 10.23.15.254 | 10.23.15.255 |
| 114 | 10.23.16.0/20 | 10.23.16.1 – 10.23.31.254 | 10.23.31.255 |
| 115 | 10.23.32.0/20 | 10.23.32.1 – 10.23.47.254 | 10.23.47.255 |
| 116 | 10.23.48.0/20 | 10.23.48.1 – 10.23.63.254 | 10.23.63.255 |
| 117 | 10.23.64.0/20 | 10.23.64.1 – 10.23.79.254 | 10.23.79.255 |
| 118 | 10.23.80.0/20 | 10.23.80.1 – 10.23.95.254 | 10.23.95.255 |
| 119 | 10.23.96.0/20 | 10.23.96.1 – 10.23.111.254 | 10.23.111.255 |
| 120 | 10.23.112.0/20 | 10.23.112.1 – 10.23.127.254 | 10.23.127.255 |
| 121 | 10.23.128.0/20 | 10.23.128.1 – 10.23.143.254 | 10.23.143.255 |
| 122 | 10.23.144.0/20 | 10.23.144.1 – 10.23.159.254 | 10.23.159.255 |
| 123 | 10.23.160.0/20 | 10.23.160.1 – 10.23.175.254 | 10.23.175.255 |
| 124 | 10.23.176.0/20 | 10.23.176.1 – 10.23.191.254 | 10.23.191.255 |
| 125 | 10.23.192.0/20 | 10.23.192.1 – 10.23.207.254 | 10.23.207.255 |
| 126 | 10.23.208.0/20 | 10.23.208.1 – 10.23.223.254 | 10.23.223.255 |
| 127 | 10.23.224.0/20 | 10.23.224.1 – 10.23.239.254 | 10.23.239.255 |
| 128 | 10.23.240.0/20 | 10.23.240.1 – 10.23.255.254 | 10.23.255.255 |
| 129 | 10.24.0.0/20 | 10.24.0.1 – 10.24.15.254 | 10.24.15.255 |
| 130 | 10.24.16.0/20 | 10.24.16.1 – 10.24.31.254 | 10.24.31.255 |
| 131 | 10.24.32.0/20 | 10.24.32.1 – 10.24.47.254 | 10.24.47.255 |
| 132 | 10.24.48.0/20 | 10.24.48.1 – 10.24.63.254 | 10.24.63.255 |
| 133 | 10.24.64.0/20 | 10.24.64.1 – 10.24.79.254 | 10.24.79.255 |
| 134 | 10.24.80.0/20 | 10.24.80.1 – 10.24.95.254 | 10.24.95.255 |
| 135 | 10.24.96.0/20 | 10.24.96.1 – 10.24.111.254 | 10.24.111.255 |
| 136 | 10.24.112.0/20 | 10.24.112.1 – 10.24.127.254 | 10.24.127.255 |
| 137 | 10.24.128.0/20 | 10.24.128.1 – 10.24.143.254 | 10.24.143.255 |
| 138 | 10.24.144.0/20 | 10.24.144.1 – 10.24.159.254 | 10.24.159.255 |
| 139 | 10.24.160.0/20 | 10.24.160.1 – 10.24.175.254 | 10.24.175.255 |
| 140 | 10.24.176.0/20 | 10.24.176.1 – 10.24.191.254 | 10.24.191.255 |
| 141 | 10.24.192.0/20 | 10.24.192.1 – 10.24.207.254 | 10.24.207.255 |
| 142 | 10.24.208.0/20 | 10.24.208.1 – 10.24.223.254 | 10.24.223.255 |
| 143 | 10.24.224.0/20 | 10.24.224.1 – 10.24.239.254 | 10.24.239.255 |
| 144 | 10.24.240.0/20 | 10.24.240.1 – 10.24.255.254 | 10.24.255.255 |
| 145 | 10.25.0.0/20 | 10.25.0.1 – 10.25.15.254 | 10.25.15.255 |
| 146 | 10.25.16.0/20 | 10.25.16.1 – 10.25.31.254 | 10.25.31.255 |
| 147 | 10.25.32.0/20 | 10.25.32.1 – 10.25.47.254 | 10.25.47.255 |
| 148 | 10.25.48.0/20 | 10.25.48.1 – 10.25.63.254 | 10.25.63.255 |
| 149 | 10.25.64.0/20 | 10.25.64.1 – 10.25.79.254 | 10.25.79.255 |
| 150 | 10.25.80.0/20 | 10.25.80.1 – 10.25.95.254 | 10.25.95.255 |
| 151 | 10.25.96.0/20 | 10.25.96.1 – 10.25.111.254 | 10.25.111.255 |
| 152 | 10.25.112.0/20 | 10.25.112.1 – 10.25.127.254 | 10.25.127.255 |
| 153 | 10.25.128.0/20 | 10.25.128.1 – 10.25.143.254 | 10.25.143.255 |
| 154 | 10.25.144.0/20 | 10.25.144.1 – 10.25.159.254 | 10.25.159.255 |
| 155 | 10.25.160.0/20 | 10.25.160.1 – 10.25.175.254 | 10.25.175.255 |
| 156 | 10.25.176.0/20 | 10.25.176.1 – 10.25.191.254 | 10.25.191.255 |
| 157 | 10.25.192.0/20 | 10.25.192.1 – 10.25.207.254 | 10.25.207.255 |
| 158 | 10.25.208.0/20 | 10.25.208.1 – 10.25.223.254 | 10.25.223.255 |
| 159 | 10.25.224.0/20 | 10.25.224.1 – 10.25.239.254 | 10.25.239.255 |
| 160 | 10.25.240.0/20 | 10.25.240.1 – 10.25.255.254 | 10.25.255.255 |
| 161 | 10.26.0.0/20 | 10.26.0.1 – 10.26.15.254 | 10.26.15.255 |
| 162 | 10.26.16.0/20 | 10.26.16.1 – 10.26.31.254 | 10.26.31.255 |
| 163 | 10.26.32.0/20 | 10.26.32.1 – 10.26.47.254 | 10.26.47.255 |
| 164 | 10.26.48.0/20 | 10.26.48.1 – 10.26.63.254 | 10.26.63.255 |
| 165 | 10.26.64.0/20 | 10.26.64.1 – 10.26.79.254 | 10.26.79.255 |
| 166 | 10.26.80.0/20 | 10.26.80.1 – 10.26.95.254 | 10.26.95.255 |
| 167 | 10.26.96.0/20 | 10.26.96.1 – 10.26.111.254 | 10.26.111.255 |
| 168 | 10.26.112.0/20 | 10.26.112.1 – 10.26.127.254 | 10.26.127.255 |
| 169 | 10.26.128.0/20 | 10.26.128.1 – 10.26.143.254 | 10.26.143.255 |
| 170 | 10.26.144.0/20 | 10.26.144.1 – 10.26.159.254 | 10.26.159.255 |
| 171 | 10.26.160.0/20 | 10.26.160.1 – 10.26.175.254 | 10.26.175.255 |
| 172 | 10.26.176.0/20 | 10.26.176.1 – 10.26.191.254 | 10.26.191.255 |
| 173 | 10.26.192.0/20 | 10.26.192.1 – 10.26.207.254 | 10.26.207.255 |
| 174 | 10.26.208.0/20 | 10.26.208.1 – 10.26.223.254 | 10.26.223.255 |
| 175 | 10.26.224.0/20 | 10.26.224.1 – 10.26.239.254 | 10.26.239.255 |
| 176 | 10.26.240.0/20 | 10.26.240.1 – 10.26.255.254 | 10.26.255.255 |
| 177 | 10.27.0.0/20 | 10.27.0.1 – 10.27.15.254 | 10.27.15.255 |
| 178 | 10.27.16.0/20 | 10.27.16.1 – 10.27.31.254 | 10.27.31.255 |
| 179 | 10.27.32.0/20 | 10.27.32.1 – 10.27.47.254 | 10.27.47.255 |
| 180 | 10.27.48.0/20 | 10.27.48.1 – 10.27.63.254 | 10.27.63.255 |
| 181 | 10.27.64.0/20 | 10.27.64.1 – 10.27.79.254 | 10.27.79.255 |
| 182 | 10.27.80.0/20 | 10.27.80.1 – 10.27.95.254 | 10.27.95.255 |
| 183 | 10.27.96.0/20 | 10.27.96.1 – 10.27.111.254 | 10.27.111.255 |
| 184 | 10.27.112.0/20 | 10.27.112.1 – 10.27.127.254 | 10.27.127.255 |
| 185 | 10.27.128.0/20 | 10.27.128.1 – 10.27.143.254 | 10.27.143.255 |
| 186 | 10.27.144.0/20 | 10.27.144.1 – 10.27.159.254 | 10.27.159.255 |
| 187 | 10.27.160.0/20 | 10.27.160.1 – 10.27.175.254 | 10.27.175.255 |
| 188 | 10.27.176.0/20 | 10.27.176.1 – 10.27.191.254 | 10.27.191.255 |
| 189 | 10.27.192.0/20 | 10.27.192.1 – 10.27.207.254 | 10.27.207.255 |
| 190 | 10.27.208.0/20 | 10.27.208.1 – 10.27.223.254 | 10.27.223.255 |
| 191 | 10.27.224.0/20 | 10.27.224.1 – 10.27.239.254 | 10.27.239.255 |
| 192 | 10.27.240.0/20 | 10.27.240.1 – 10.27.255.254 | 10.27.255.255 |
| 193 | 10.28.0.0/20 | 10.28.0.1 – 10.28.15.254 | 10.28.15.255 |
| 194 | 10.28.16.0/20 | 10.28.16.1 – 10.28.31.254 | 10.28.31.255 |
| 195 | 10.28.32.0/20 | 10.28.32.1 – 10.28.47.254 | 10.28.47.255 |
| 196 | 10.28.48.0/20 | 10.28.48.1 – 10.28.63.254 | 10.28.63.255 |
| 197 | 10.28.64.0/20 | 10.28.64.1 – 10.28.79.254 | 10.28.79.255 |
| 198 | 10.28.80.0/20 | 10.28.80.1 – 10.28.95.254 | 10.28.95.255 |
| 199 | 10.28.96.0/20 | 10.28.96.1 – 10.28.111.254 | 10.28.111.255 |
| 200 | 10.28.112.0/20 | 10.28.112.1 – 10.28.127.254 | 10.28.127.255 |
| 201 | 10.28.128.0/20 | 10.28.128.1 – 10.28.143.254 | 10.28.143.255 |
| 202 | 10.28.144.0/20 | 10.28.144.1 – 10.28.159.254 | 10.28.159.255 |
| 203 | 10.28.160.0/20 | 10.28.160.1 – 10.28.175.254 | 10.28.175.255 |
| 204 | 10.28.176.0/20 | 10.28.176.1 – 10.28.191.254 | 10.28.191.255 |
| 205 | 10.28.192.0/20 | 10.28.192.1 – 10.28.207.254 | 10.28.207.255 |
| 206 | 10.28.208.0/20 | 10.28.208.1 – 10.28.223.254 | 10.28.223.255 |
| 207 | 10.28.224.0/20 | 10.28.224.1 – 10.28.239.254 | 10.28.239.255 |
| 208 | 10.28.240.0/20 | 10.28.240.1 – 10.28.255.254 | 10.28.255.255 |
| 209 | 10.29.0.0/20 | 10.29.0.1 – 10.29.15.254 | 10.29.15.255 |
| 210 | 10.29.16.0/20 | 10.29.16.1 – 10.29.31.254 | 10.29.31.255 |
| 211 | 10.29.32.0/20 | 10.29.32.1 – 10.29.47.254 | 10.29.47.255 |
| 212 | 10.29.48.0/20 | 10.29.48.1 – 10.29.63.254 | 10.29.63.255 |
| 213 | 10.29.64.0/20 | 10.29.64.1 – 10.29.79.254 | 10.29.79.255 |
| 214 | 10.29.80.0/20 | 10.29.80.1 – 10.29.95.254 | 10.29.95.255 |
| 215 | 10.29.96.0/20 | 10.29.96.1 – 10.29.111.254 | 10.29.111.255 |
| 216 | 10.29.112.0/20 | 10.29.112.1 – 10.29.127.254 | 10.29.127.255 |
| 217 | 10.29.128.0/20 | 10.29.128.1 – 10.29.143.254 | 10.29.143.255 |
| 218 | 10.29.144.0/20 | 10.29.144.1 – 10.29.159.254 | 10.29.159.255 |
| 219 | 10.29.160.0/20 | 10.29.160.1 – 10.29.175.254 | 10.29.175.255 |
| 220 | 10.29.176.0/20 | 10.29.176.1 – 10.29.191.254 | 10.29.191.255 |
| 221 | 10.29.192.0/20 | 10.29.192.1 – 10.29.207.254 | 10.29.207.255 |
| 222 | 10.29.208.0/20 | 10.29.208.1 – 10.29.223.254 | 10.29.223.255 |
| 223 | 10.29.224.0/20 | 10.29.224.1 – 10.29.239.254 | 10.29.239.255 |
| 224 | 10.29.240.0/20 | 10.29.240.1 – 10.29.255.254 | 10.29.255.255 |
| 225 | 10.30.0.0/20 | 10.30.0.1 – 10.30.15.254 | 10.30.15.255 |
| 226 | 10.30.16.0/20 | 10.30.16.1 – 10.30.31.254 | 10.30.31.255 |
| 227 | 10.30.32.0/20 | 10.30.32.1 – 10.30.47.254 | 10.30.47.255 |
| 228 | 10.30.48.0/20 | 10.30.48.1 – 10.30.63.254 | 10.30.63.255 |
| 229 | 10.30.64.0/20 | 10.30.64.1 – 10.30.79.254 | 10.30.79.255 |
| 230 | 10.30.80.0/20 | 10.30.80.1 – 10.30.95.254 | 10.30.95.255 |
| 231 | 10.30.96.0/20 | 10.30.96.1 – 10.30.111.254 | 10.30.111.255 |
| 232 | 10.30.112.0/20 | 10.30.112.1 – 10.30.127.254 | 10.30.127.255 |
| 233 | 10.30.128.0/20 | 10.30.128.1 – 10.30.143.254 | 10.30.143.255 |
| 234 | 10.30.144.0/20 | 10.30.144.1 – 10.30.159.254 | 10.30.159.255 |
| 235 | 10.30.160.0/20 | 10.30.160.1 – 10.30.175.254 | 10.30.175.255 |
| 236 | 10.30.176.0/20 | 10.30.176.1 – 10.30.191.254 | 10.30.191.255 |
| 237 | 10.30.192.0/20 | 10.30.192.1 – 10.30.207.254 | 10.30.207.255 |
| 238 | 10.30.208.0/20 | 10.30.208.1 – 10.30.223.254 | 10.30.223.255 |
| 239 | 10.30.224.0/20 | 10.30.224.1 – 10.30.239.254 | 10.30.239.255 |
| 240 | 10.30.240.0/20 | 10.30.240.1 – 10.30.255.254 | 10.30.255.255 |
| 241 | 10.31.0.0/20 | 10.31.0.1 – 10.31.15.254 | 10.31.15.255 |
| 242 | 10.31.16.0/20 | 10.31.16.1 – 10.31.31.254 | 10.31.31.255 |
| 243 | 10.31.32.0/20 | 10.31.32.1 – 10.31.47.254 | 10.31.47.255 |
| 244 | 10.31.48.0/20 | 10.31.48.1 – 10.31.63.254 | 10.31.63.255 |
| 245 | 10.31.64.0/20 | 10.31.64.1 – 10.31.79.254 | 10.31.79.255 |
| 246 | 10.31.80.0/20 | 10.31.80.1 – 10.31.95.254 | 10.31.95.255 |
| 247 | 10.31.96.0/20 | 10.31.96.1 – 10.31.111.254 | 10.31.111.255 |
| 248 | 10.31.112.0/20 | 10.31.112.1 – 10.31.127.254 | 10.31.127.255 |
| 249 | 10.31.128.0/20 | 10.31.128.1 – 10.31.143.254 | 10.31.143.255 |
| 250 | 10.31.144.0/20 | 10.31.144.1 – 10.31.159.254 | 10.31.159.255 |
| 251 | 10.31.160.0/20 | 10.31.160.1 – 10.31.175.254 | 10.31.175.255 |
| 252 | 10.31.176.0/20 | 10.31.176.1 – 10.31.191.254 | 10.31.191.255 |
| 253 | 10.31.192.0/20 | 10.31.192.1 – 10.31.207.254 | 10.31.207.255 |
| 254 | 10.31.208.0/20 | 10.31.208.1 – 10.31.223.254 | 10.31.223.255 |
| 255 | 10.31.224.0/20 | 10.31.224.1 – 10.31.239.254 | 10.31.239.255 |
| 256 | 10.31.240.0/20 | 10.31.240.1 – 10.31.255.254 | 10.31.255.255 |
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.