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)10.81.0.0/16
network10.81.0.0/16
broadcast10.81.255.255
first host10.81.0.1
last host10.81.255.254
subnet mask255.255.0.0
wildcard0.0.255.255
addresses65,536
usable hosts65,534
classA
ipcalc 10.81.0.0/16
address00001010.01010001.00000000.00000000
subnet mask11111111.11111111.00000000.00000000
network00001010.01010001.00000000.00000000
broadcast00001010.01010001.11111111.11111111
green = network part, grey = host part
hex0x0a510000
decimal173080576
reverse dns0.0.81.10.in-addr.arpa
ipv4-mapped::ffff:a51:0
/16 split into /24 · 256 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.81.0.0/24 | 10.81.0.1 – 10.81.0.254 | 10.81.0.255 |
| 2 | 10.81.1.0/24 | 10.81.1.1 – 10.81.1.254 | 10.81.1.255 |
| 3 | 10.81.2.0/24 | 10.81.2.1 – 10.81.2.254 | 10.81.2.255 |
| 4 | 10.81.3.0/24 | 10.81.3.1 – 10.81.3.254 | 10.81.3.255 |
| 5 | 10.81.4.0/24 | 10.81.4.1 – 10.81.4.254 | 10.81.4.255 |
| 6 | 10.81.5.0/24 | 10.81.5.1 – 10.81.5.254 | 10.81.5.255 |
| 7 | 10.81.6.0/24 | 10.81.6.1 – 10.81.6.254 | 10.81.6.255 |
| 8 | 10.81.7.0/24 | 10.81.7.1 – 10.81.7.254 | 10.81.7.255 |
| 9 | 10.81.8.0/24 | 10.81.8.1 – 10.81.8.254 | 10.81.8.255 |
| 10 | 10.81.9.0/24 | 10.81.9.1 – 10.81.9.254 | 10.81.9.255 |
| 11 | 10.81.10.0/24 | 10.81.10.1 – 10.81.10.254 | 10.81.10.255 |
| 12 | 10.81.11.0/24 | 10.81.11.1 – 10.81.11.254 | 10.81.11.255 |
| 13 | 10.81.12.0/24 | 10.81.12.1 – 10.81.12.254 | 10.81.12.255 |
| 14 | 10.81.13.0/24 | 10.81.13.1 – 10.81.13.254 | 10.81.13.255 |
| 15 | 10.81.14.0/24 | 10.81.14.1 – 10.81.14.254 | 10.81.14.255 |
| 16 | 10.81.15.0/24 | 10.81.15.1 – 10.81.15.254 | 10.81.15.255 |
| 17 | 10.81.16.0/24 | 10.81.16.1 – 10.81.16.254 | 10.81.16.255 |
| 18 | 10.81.17.0/24 | 10.81.17.1 – 10.81.17.254 | 10.81.17.255 |
| 19 | 10.81.18.0/24 | 10.81.18.1 – 10.81.18.254 | 10.81.18.255 |
| 20 | 10.81.19.0/24 | 10.81.19.1 – 10.81.19.254 | 10.81.19.255 |
| 21 | 10.81.20.0/24 | 10.81.20.1 – 10.81.20.254 | 10.81.20.255 |
| 22 | 10.81.21.0/24 | 10.81.21.1 – 10.81.21.254 | 10.81.21.255 |
| 23 | 10.81.22.0/24 | 10.81.22.1 – 10.81.22.254 | 10.81.22.255 |
| 24 | 10.81.23.0/24 | 10.81.23.1 – 10.81.23.254 | 10.81.23.255 |
| 25 | 10.81.24.0/24 | 10.81.24.1 – 10.81.24.254 | 10.81.24.255 |
| 26 | 10.81.25.0/24 | 10.81.25.1 – 10.81.25.254 | 10.81.25.255 |
| 27 | 10.81.26.0/24 | 10.81.26.1 – 10.81.26.254 | 10.81.26.255 |
| 28 | 10.81.27.0/24 | 10.81.27.1 – 10.81.27.254 | 10.81.27.255 |
| 29 | 10.81.28.0/24 | 10.81.28.1 – 10.81.28.254 | 10.81.28.255 |
| 30 | 10.81.29.0/24 | 10.81.29.1 – 10.81.29.254 | 10.81.29.255 |
| 31 | 10.81.30.0/24 | 10.81.30.1 – 10.81.30.254 | 10.81.30.255 |
| 32 | 10.81.31.0/24 | 10.81.31.1 – 10.81.31.254 | 10.81.31.255 |
| 33 | 10.81.32.0/24 | 10.81.32.1 – 10.81.32.254 | 10.81.32.255 |
| 34 | 10.81.33.0/24 | 10.81.33.1 – 10.81.33.254 | 10.81.33.255 |
| 35 | 10.81.34.0/24 | 10.81.34.1 – 10.81.34.254 | 10.81.34.255 |
| 36 | 10.81.35.0/24 | 10.81.35.1 – 10.81.35.254 | 10.81.35.255 |
| 37 | 10.81.36.0/24 | 10.81.36.1 – 10.81.36.254 | 10.81.36.255 |
| 38 | 10.81.37.0/24 | 10.81.37.1 – 10.81.37.254 | 10.81.37.255 |
| 39 | 10.81.38.0/24 | 10.81.38.1 – 10.81.38.254 | 10.81.38.255 |
| 40 | 10.81.39.0/24 | 10.81.39.1 – 10.81.39.254 | 10.81.39.255 |
| 41 | 10.81.40.0/24 | 10.81.40.1 – 10.81.40.254 | 10.81.40.255 |
| 42 | 10.81.41.0/24 | 10.81.41.1 – 10.81.41.254 | 10.81.41.255 |
| 43 | 10.81.42.0/24 | 10.81.42.1 – 10.81.42.254 | 10.81.42.255 |
| 44 | 10.81.43.0/24 | 10.81.43.1 – 10.81.43.254 | 10.81.43.255 |
| 45 | 10.81.44.0/24 | 10.81.44.1 – 10.81.44.254 | 10.81.44.255 |
| 46 | 10.81.45.0/24 | 10.81.45.1 – 10.81.45.254 | 10.81.45.255 |
| 47 | 10.81.46.0/24 | 10.81.46.1 – 10.81.46.254 | 10.81.46.255 |
| 48 | 10.81.47.0/24 | 10.81.47.1 – 10.81.47.254 | 10.81.47.255 |
| 49 | 10.81.48.0/24 | 10.81.48.1 – 10.81.48.254 | 10.81.48.255 |
| 50 | 10.81.49.0/24 | 10.81.49.1 – 10.81.49.254 | 10.81.49.255 |
| 51 | 10.81.50.0/24 | 10.81.50.1 – 10.81.50.254 | 10.81.50.255 |
| 52 | 10.81.51.0/24 | 10.81.51.1 – 10.81.51.254 | 10.81.51.255 |
| 53 | 10.81.52.0/24 | 10.81.52.1 – 10.81.52.254 | 10.81.52.255 |
| 54 | 10.81.53.0/24 | 10.81.53.1 – 10.81.53.254 | 10.81.53.255 |
| 55 | 10.81.54.0/24 | 10.81.54.1 – 10.81.54.254 | 10.81.54.255 |
| 56 | 10.81.55.0/24 | 10.81.55.1 – 10.81.55.254 | 10.81.55.255 |
| 57 | 10.81.56.0/24 | 10.81.56.1 – 10.81.56.254 | 10.81.56.255 |
| 58 | 10.81.57.0/24 | 10.81.57.1 – 10.81.57.254 | 10.81.57.255 |
| 59 | 10.81.58.0/24 | 10.81.58.1 – 10.81.58.254 | 10.81.58.255 |
| 60 | 10.81.59.0/24 | 10.81.59.1 – 10.81.59.254 | 10.81.59.255 |
| 61 | 10.81.60.0/24 | 10.81.60.1 – 10.81.60.254 | 10.81.60.255 |
| 62 | 10.81.61.0/24 | 10.81.61.1 – 10.81.61.254 | 10.81.61.255 |
| 63 | 10.81.62.0/24 | 10.81.62.1 – 10.81.62.254 | 10.81.62.255 |
| 64 | 10.81.63.0/24 | 10.81.63.1 – 10.81.63.254 | 10.81.63.255 |
| 65 | 10.81.64.0/24 | 10.81.64.1 – 10.81.64.254 | 10.81.64.255 |
| 66 | 10.81.65.0/24 | 10.81.65.1 – 10.81.65.254 | 10.81.65.255 |
| 67 | 10.81.66.0/24 | 10.81.66.1 – 10.81.66.254 | 10.81.66.255 |
| 68 | 10.81.67.0/24 | 10.81.67.1 – 10.81.67.254 | 10.81.67.255 |
| 69 | 10.81.68.0/24 | 10.81.68.1 – 10.81.68.254 | 10.81.68.255 |
| 70 | 10.81.69.0/24 | 10.81.69.1 – 10.81.69.254 | 10.81.69.255 |
| 71 | 10.81.70.0/24 | 10.81.70.1 – 10.81.70.254 | 10.81.70.255 |
| 72 | 10.81.71.0/24 | 10.81.71.1 – 10.81.71.254 | 10.81.71.255 |
| 73 | 10.81.72.0/24 | 10.81.72.1 – 10.81.72.254 | 10.81.72.255 |
| 74 | 10.81.73.0/24 | 10.81.73.1 – 10.81.73.254 | 10.81.73.255 |
| 75 | 10.81.74.0/24 | 10.81.74.1 – 10.81.74.254 | 10.81.74.255 |
| 76 | 10.81.75.0/24 | 10.81.75.1 – 10.81.75.254 | 10.81.75.255 |
| 77 | 10.81.76.0/24 | 10.81.76.1 – 10.81.76.254 | 10.81.76.255 |
| 78 | 10.81.77.0/24 | 10.81.77.1 – 10.81.77.254 | 10.81.77.255 |
| 79 | 10.81.78.0/24 | 10.81.78.1 – 10.81.78.254 | 10.81.78.255 |
| 80 | 10.81.79.0/24 | 10.81.79.1 – 10.81.79.254 | 10.81.79.255 |
| 81 | 10.81.80.0/24 | 10.81.80.1 – 10.81.80.254 | 10.81.80.255 |
| 82 | 10.81.81.0/24 | 10.81.81.1 – 10.81.81.254 | 10.81.81.255 |
| 83 | 10.81.82.0/24 | 10.81.82.1 – 10.81.82.254 | 10.81.82.255 |
| 84 | 10.81.83.0/24 | 10.81.83.1 – 10.81.83.254 | 10.81.83.255 |
| 85 | 10.81.84.0/24 | 10.81.84.1 – 10.81.84.254 | 10.81.84.255 |
| 86 | 10.81.85.0/24 | 10.81.85.1 – 10.81.85.254 | 10.81.85.255 |
| 87 | 10.81.86.0/24 | 10.81.86.1 – 10.81.86.254 | 10.81.86.255 |
| 88 | 10.81.87.0/24 | 10.81.87.1 – 10.81.87.254 | 10.81.87.255 |
| 89 | 10.81.88.0/24 | 10.81.88.1 – 10.81.88.254 | 10.81.88.255 |
| 90 | 10.81.89.0/24 | 10.81.89.1 – 10.81.89.254 | 10.81.89.255 |
| 91 | 10.81.90.0/24 | 10.81.90.1 – 10.81.90.254 | 10.81.90.255 |
| 92 | 10.81.91.0/24 | 10.81.91.1 – 10.81.91.254 | 10.81.91.255 |
| 93 | 10.81.92.0/24 | 10.81.92.1 – 10.81.92.254 | 10.81.92.255 |
| 94 | 10.81.93.0/24 | 10.81.93.1 – 10.81.93.254 | 10.81.93.255 |
| 95 | 10.81.94.0/24 | 10.81.94.1 – 10.81.94.254 | 10.81.94.255 |
| 96 | 10.81.95.0/24 | 10.81.95.1 – 10.81.95.254 | 10.81.95.255 |
| 97 | 10.81.96.0/24 | 10.81.96.1 – 10.81.96.254 | 10.81.96.255 |
| 98 | 10.81.97.0/24 | 10.81.97.1 – 10.81.97.254 | 10.81.97.255 |
| 99 | 10.81.98.0/24 | 10.81.98.1 – 10.81.98.254 | 10.81.98.255 |
| 100 | 10.81.99.0/24 | 10.81.99.1 – 10.81.99.254 | 10.81.99.255 |
| 101 | 10.81.100.0/24 | 10.81.100.1 – 10.81.100.254 | 10.81.100.255 |
| 102 | 10.81.101.0/24 | 10.81.101.1 – 10.81.101.254 | 10.81.101.255 |
| 103 | 10.81.102.0/24 | 10.81.102.1 – 10.81.102.254 | 10.81.102.255 |
| 104 | 10.81.103.0/24 | 10.81.103.1 – 10.81.103.254 | 10.81.103.255 |
| 105 | 10.81.104.0/24 | 10.81.104.1 – 10.81.104.254 | 10.81.104.255 |
| 106 | 10.81.105.0/24 | 10.81.105.1 – 10.81.105.254 | 10.81.105.255 |
| 107 | 10.81.106.0/24 | 10.81.106.1 – 10.81.106.254 | 10.81.106.255 |
| 108 | 10.81.107.0/24 | 10.81.107.1 – 10.81.107.254 | 10.81.107.255 |
| 109 | 10.81.108.0/24 | 10.81.108.1 – 10.81.108.254 | 10.81.108.255 |
| 110 | 10.81.109.0/24 | 10.81.109.1 – 10.81.109.254 | 10.81.109.255 |
| 111 | 10.81.110.0/24 | 10.81.110.1 – 10.81.110.254 | 10.81.110.255 |
| 112 | 10.81.111.0/24 | 10.81.111.1 – 10.81.111.254 | 10.81.111.255 |
| 113 | 10.81.112.0/24 | 10.81.112.1 – 10.81.112.254 | 10.81.112.255 |
| 114 | 10.81.113.0/24 | 10.81.113.1 – 10.81.113.254 | 10.81.113.255 |
| 115 | 10.81.114.0/24 | 10.81.114.1 – 10.81.114.254 | 10.81.114.255 |
| 116 | 10.81.115.0/24 | 10.81.115.1 – 10.81.115.254 | 10.81.115.255 |
| 117 | 10.81.116.0/24 | 10.81.116.1 – 10.81.116.254 | 10.81.116.255 |
| 118 | 10.81.117.0/24 | 10.81.117.1 – 10.81.117.254 | 10.81.117.255 |
| 119 | 10.81.118.0/24 | 10.81.118.1 – 10.81.118.254 | 10.81.118.255 |
| 120 | 10.81.119.0/24 | 10.81.119.1 – 10.81.119.254 | 10.81.119.255 |
| 121 | 10.81.120.0/24 | 10.81.120.1 – 10.81.120.254 | 10.81.120.255 |
| 122 | 10.81.121.0/24 | 10.81.121.1 – 10.81.121.254 | 10.81.121.255 |
| 123 | 10.81.122.0/24 | 10.81.122.1 – 10.81.122.254 | 10.81.122.255 |
| 124 | 10.81.123.0/24 | 10.81.123.1 – 10.81.123.254 | 10.81.123.255 |
| 125 | 10.81.124.0/24 | 10.81.124.1 – 10.81.124.254 | 10.81.124.255 |
| 126 | 10.81.125.0/24 | 10.81.125.1 – 10.81.125.254 | 10.81.125.255 |
| 127 | 10.81.126.0/24 | 10.81.126.1 – 10.81.126.254 | 10.81.126.255 |
| 128 | 10.81.127.0/24 | 10.81.127.1 – 10.81.127.254 | 10.81.127.255 |
| 129 | 10.81.128.0/24 | 10.81.128.1 – 10.81.128.254 | 10.81.128.255 |
| 130 | 10.81.129.0/24 | 10.81.129.1 – 10.81.129.254 | 10.81.129.255 |
| 131 | 10.81.130.0/24 | 10.81.130.1 – 10.81.130.254 | 10.81.130.255 |
| 132 | 10.81.131.0/24 | 10.81.131.1 – 10.81.131.254 | 10.81.131.255 |
| 133 | 10.81.132.0/24 | 10.81.132.1 – 10.81.132.254 | 10.81.132.255 |
| 134 | 10.81.133.0/24 | 10.81.133.1 – 10.81.133.254 | 10.81.133.255 |
| 135 | 10.81.134.0/24 | 10.81.134.1 – 10.81.134.254 | 10.81.134.255 |
| 136 | 10.81.135.0/24 | 10.81.135.1 – 10.81.135.254 | 10.81.135.255 |
| 137 | 10.81.136.0/24 | 10.81.136.1 – 10.81.136.254 | 10.81.136.255 |
| 138 | 10.81.137.0/24 | 10.81.137.1 – 10.81.137.254 | 10.81.137.255 |
| 139 | 10.81.138.0/24 | 10.81.138.1 – 10.81.138.254 | 10.81.138.255 |
| 140 | 10.81.139.0/24 | 10.81.139.1 – 10.81.139.254 | 10.81.139.255 |
| 141 | 10.81.140.0/24 | 10.81.140.1 – 10.81.140.254 | 10.81.140.255 |
| 142 | 10.81.141.0/24 | 10.81.141.1 – 10.81.141.254 | 10.81.141.255 |
| 143 | 10.81.142.0/24 | 10.81.142.1 – 10.81.142.254 | 10.81.142.255 |
| 144 | 10.81.143.0/24 | 10.81.143.1 – 10.81.143.254 | 10.81.143.255 |
| 145 | 10.81.144.0/24 | 10.81.144.1 – 10.81.144.254 | 10.81.144.255 |
| 146 | 10.81.145.0/24 | 10.81.145.1 – 10.81.145.254 | 10.81.145.255 |
| 147 | 10.81.146.0/24 | 10.81.146.1 – 10.81.146.254 | 10.81.146.255 |
| 148 | 10.81.147.0/24 | 10.81.147.1 – 10.81.147.254 | 10.81.147.255 |
| 149 | 10.81.148.0/24 | 10.81.148.1 – 10.81.148.254 | 10.81.148.255 |
| 150 | 10.81.149.0/24 | 10.81.149.1 – 10.81.149.254 | 10.81.149.255 |
| 151 | 10.81.150.0/24 | 10.81.150.1 – 10.81.150.254 | 10.81.150.255 |
| 152 | 10.81.151.0/24 | 10.81.151.1 – 10.81.151.254 | 10.81.151.255 |
| 153 | 10.81.152.0/24 | 10.81.152.1 – 10.81.152.254 | 10.81.152.255 |
| 154 | 10.81.153.0/24 | 10.81.153.1 – 10.81.153.254 | 10.81.153.255 |
| 155 | 10.81.154.0/24 | 10.81.154.1 – 10.81.154.254 | 10.81.154.255 |
| 156 | 10.81.155.0/24 | 10.81.155.1 – 10.81.155.254 | 10.81.155.255 |
| 157 | 10.81.156.0/24 | 10.81.156.1 – 10.81.156.254 | 10.81.156.255 |
| 158 | 10.81.157.0/24 | 10.81.157.1 – 10.81.157.254 | 10.81.157.255 |
| 159 | 10.81.158.0/24 | 10.81.158.1 – 10.81.158.254 | 10.81.158.255 |
| 160 | 10.81.159.0/24 | 10.81.159.1 – 10.81.159.254 | 10.81.159.255 |
| 161 | 10.81.160.0/24 | 10.81.160.1 – 10.81.160.254 | 10.81.160.255 |
| 162 | 10.81.161.0/24 | 10.81.161.1 – 10.81.161.254 | 10.81.161.255 |
| 163 | 10.81.162.0/24 | 10.81.162.1 – 10.81.162.254 | 10.81.162.255 |
| 164 | 10.81.163.0/24 | 10.81.163.1 – 10.81.163.254 | 10.81.163.255 |
| 165 | 10.81.164.0/24 | 10.81.164.1 – 10.81.164.254 | 10.81.164.255 |
| 166 | 10.81.165.0/24 | 10.81.165.1 – 10.81.165.254 | 10.81.165.255 |
| 167 | 10.81.166.0/24 | 10.81.166.1 – 10.81.166.254 | 10.81.166.255 |
| 168 | 10.81.167.0/24 | 10.81.167.1 – 10.81.167.254 | 10.81.167.255 |
| 169 | 10.81.168.0/24 | 10.81.168.1 – 10.81.168.254 | 10.81.168.255 |
| 170 | 10.81.169.0/24 | 10.81.169.1 – 10.81.169.254 | 10.81.169.255 |
| 171 | 10.81.170.0/24 | 10.81.170.1 – 10.81.170.254 | 10.81.170.255 |
| 172 | 10.81.171.0/24 | 10.81.171.1 – 10.81.171.254 | 10.81.171.255 |
| 173 | 10.81.172.0/24 | 10.81.172.1 – 10.81.172.254 | 10.81.172.255 |
| 174 | 10.81.173.0/24 | 10.81.173.1 – 10.81.173.254 | 10.81.173.255 |
| 175 | 10.81.174.0/24 | 10.81.174.1 – 10.81.174.254 | 10.81.174.255 |
| 176 | 10.81.175.0/24 | 10.81.175.1 – 10.81.175.254 | 10.81.175.255 |
| 177 | 10.81.176.0/24 | 10.81.176.1 – 10.81.176.254 | 10.81.176.255 |
| 178 | 10.81.177.0/24 | 10.81.177.1 – 10.81.177.254 | 10.81.177.255 |
| 179 | 10.81.178.0/24 | 10.81.178.1 – 10.81.178.254 | 10.81.178.255 |
| 180 | 10.81.179.0/24 | 10.81.179.1 – 10.81.179.254 | 10.81.179.255 |
| 181 | 10.81.180.0/24 | 10.81.180.1 – 10.81.180.254 | 10.81.180.255 |
| 182 | 10.81.181.0/24 | 10.81.181.1 – 10.81.181.254 | 10.81.181.255 |
| 183 | 10.81.182.0/24 | 10.81.182.1 – 10.81.182.254 | 10.81.182.255 |
| 184 | 10.81.183.0/24 | 10.81.183.1 – 10.81.183.254 | 10.81.183.255 |
| 185 | 10.81.184.0/24 | 10.81.184.1 – 10.81.184.254 | 10.81.184.255 |
| 186 | 10.81.185.0/24 | 10.81.185.1 – 10.81.185.254 | 10.81.185.255 |
| 187 | 10.81.186.0/24 | 10.81.186.1 – 10.81.186.254 | 10.81.186.255 |
| 188 | 10.81.187.0/24 | 10.81.187.1 – 10.81.187.254 | 10.81.187.255 |
| 189 | 10.81.188.0/24 | 10.81.188.1 – 10.81.188.254 | 10.81.188.255 |
| 190 | 10.81.189.0/24 | 10.81.189.1 – 10.81.189.254 | 10.81.189.255 |
| 191 | 10.81.190.0/24 | 10.81.190.1 – 10.81.190.254 | 10.81.190.255 |
| 192 | 10.81.191.0/24 | 10.81.191.1 – 10.81.191.254 | 10.81.191.255 |
| 193 | 10.81.192.0/24 | 10.81.192.1 – 10.81.192.254 | 10.81.192.255 |
| 194 | 10.81.193.0/24 | 10.81.193.1 – 10.81.193.254 | 10.81.193.255 |
| 195 | 10.81.194.0/24 | 10.81.194.1 – 10.81.194.254 | 10.81.194.255 |
| 196 | 10.81.195.0/24 | 10.81.195.1 – 10.81.195.254 | 10.81.195.255 |
| 197 | 10.81.196.0/24 | 10.81.196.1 – 10.81.196.254 | 10.81.196.255 |
| 198 | 10.81.197.0/24 | 10.81.197.1 – 10.81.197.254 | 10.81.197.255 |
| 199 | 10.81.198.0/24 | 10.81.198.1 – 10.81.198.254 | 10.81.198.255 |
| 200 | 10.81.199.0/24 | 10.81.199.1 – 10.81.199.254 | 10.81.199.255 |
| 201 | 10.81.200.0/24 | 10.81.200.1 – 10.81.200.254 | 10.81.200.255 |
| 202 | 10.81.201.0/24 | 10.81.201.1 – 10.81.201.254 | 10.81.201.255 |
| 203 | 10.81.202.0/24 | 10.81.202.1 – 10.81.202.254 | 10.81.202.255 |
| 204 | 10.81.203.0/24 | 10.81.203.1 – 10.81.203.254 | 10.81.203.255 |
| 205 | 10.81.204.0/24 | 10.81.204.1 – 10.81.204.254 | 10.81.204.255 |
| 206 | 10.81.205.0/24 | 10.81.205.1 – 10.81.205.254 | 10.81.205.255 |
| 207 | 10.81.206.0/24 | 10.81.206.1 – 10.81.206.254 | 10.81.206.255 |
| 208 | 10.81.207.0/24 | 10.81.207.1 – 10.81.207.254 | 10.81.207.255 |
| 209 | 10.81.208.0/24 | 10.81.208.1 – 10.81.208.254 | 10.81.208.255 |
| 210 | 10.81.209.0/24 | 10.81.209.1 – 10.81.209.254 | 10.81.209.255 |
| 211 | 10.81.210.0/24 | 10.81.210.1 – 10.81.210.254 | 10.81.210.255 |
| 212 | 10.81.211.0/24 | 10.81.211.1 – 10.81.211.254 | 10.81.211.255 |
| 213 | 10.81.212.0/24 | 10.81.212.1 – 10.81.212.254 | 10.81.212.255 |
| 214 | 10.81.213.0/24 | 10.81.213.1 – 10.81.213.254 | 10.81.213.255 |
| 215 | 10.81.214.0/24 | 10.81.214.1 – 10.81.214.254 | 10.81.214.255 |
| 216 | 10.81.215.0/24 | 10.81.215.1 – 10.81.215.254 | 10.81.215.255 |
| 217 | 10.81.216.0/24 | 10.81.216.1 – 10.81.216.254 | 10.81.216.255 |
| 218 | 10.81.217.0/24 | 10.81.217.1 – 10.81.217.254 | 10.81.217.255 |
| 219 | 10.81.218.0/24 | 10.81.218.1 – 10.81.218.254 | 10.81.218.255 |
| 220 | 10.81.219.0/24 | 10.81.219.1 – 10.81.219.254 | 10.81.219.255 |
| 221 | 10.81.220.0/24 | 10.81.220.1 – 10.81.220.254 | 10.81.220.255 |
| 222 | 10.81.221.0/24 | 10.81.221.1 – 10.81.221.254 | 10.81.221.255 |
| 223 | 10.81.222.0/24 | 10.81.222.1 – 10.81.222.254 | 10.81.222.255 |
| 224 | 10.81.223.0/24 | 10.81.223.1 – 10.81.223.254 | 10.81.223.255 |
| 225 | 10.81.224.0/24 | 10.81.224.1 – 10.81.224.254 | 10.81.224.255 |
| 226 | 10.81.225.0/24 | 10.81.225.1 – 10.81.225.254 | 10.81.225.255 |
| 227 | 10.81.226.0/24 | 10.81.226.1 – 10.81.226.254 | 10.81.226.255 |
| 228 | 10.81.227.0/24 | 10.81.227.1 – 10.81.227.254 | 10.81.227.255 |
| 229 | 10.81.228.0/24 | 10.81.228.1 – 10.81.228.254 | 10.81.228.255 |
| 230 | 10.81.229.0/24 | 10.81.229.1 – 10.81.229.254 | 10.81.229.255 |
| 231 | 10.81.230.0/24 | 10.81.230.1 – 10.81.230.254 | 10.81.230.255 |
| 232 | 10.81.231.0/24 | 10.81.231.1 – 10.81.231.254 | 10.81.231.255 |
| 233 | 10.81.232.0/24 | 10.81.232.1 – 10.81.232.254 | 10.81.232.255 |
| 234 | 10.81.233.0/24 | 10.81.233.1 – 10.81.233.254 | 10.81.233.255 |
| 235 | 10.81.234.0/24 | 10.81.234.1 – 10.81.234.254 | 10.81.234.255 |
| 236 | 10.81.235.0/24 | 10.81.235.1 – 10.81.235.254 | 10.81.235.255 |
| 237 | 10.81.236.0/24 | 10.81.236.1 – 10.81.236.254 | 10.81.236.255 |
| 238 | 10.81.237.0/24 | 10.81.237.1 – 10.81.237.254 | 10.81.237.255 |
| 239 | 10.81.238.0/24 | 10.81.238.1 – 10.81.238.254 | 10.81.238.255 |
| 240 | 10.81.239.0/24 | 10.81.239.1 – 10.81.239.254 | 10.81.239.255 |
| 241 | 10.81.240.0/24 | 10.81.240.1 – 10.81.240.254 | 10.81.240.255 |
| 242 | 10.81.241.0/24 | 10.81.241.1 – 10.81.241.254 | 10.81.241.255 |
| 243 | 10.81.242.0/24 | 10.81.242.1 – 10.81.242.254 | 10.81.242.255 |
| 244 | 10.81.243.0/24 | 10.81.243.1 – 10.81.243.254 | 10.81.243.255 |
| 245 | 10.81.244.0/24 | 10.81.244.1 – 10.81.244.254 | 10.81.244.255 |
| 246 | 10.81.245.0/24 | 10.81.245.1 – 10.81.245.254 | 10.81.245.255 |
| 247 | 10.81.246.0/24 | 10.81.246.1 – 10.81.246.254 | 10.81.246.255 |
| 248 | 10.81.247.0/24 | 10.81.247.1 – 10.81.247.254 | 10.81.247.255 |
| 249 | 10.81.248.0/24 | 10.81.248.1 – 10.81.248.254 | 10.81.248.255 |
| 250 | 10.81.249.0/24 | 10.81.249.1 – 10.81.249.254 | 10.81.249.255 |
| 251 | 10.81.250.0/24 | 10.81.250.1 – 10.81.250.254 | 10.81.250.255 |
| 252 | 10.81.251.0/24 | 10.81.251.1 – 10.81.251.254 | 10.81.251.255 |
| 253 | 10.81.252.0/24 | 10.81.252.1 – 10.81.252.254 | 10.81.252.255 |
| 254 | 10.81.253.0/24 | 10.81.253.1 – 10.81.253.254 | 10.81.253.255 |
| 255 | 10.81.254.0/24 | 10.81.254.1 – 10.81.254.254 | 10.81.254.255 |
| 256 | 10.81.255.0/24 | 10.81.255.1 – 10.81.255.254 | 10.81.255.255 |
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 /16 |
|---|---|---|---|---|
| /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 | - |
| /13 | 255.248.0.0 | 524,288 | 524,286 | - |
| /14 | 255.252.0.0 | 262,144 | 262,142 | - |
| /15 | 255.254.0.0 | 131,072 | 131,070 | - |
| /16 | 255.255.0.0 | 65,536 | 65,534 | 1 |
| /17 | 255.255.128.0 | 32,768 | 32,766 | 2 split → |
| /18 | 255.255.192.0 | 16,384 | 16,382 | 4 split → |
| /19 | 255.255.224.0 | 8,192 | 8,190 | 8 split → |
| /20 | 255.255.240.0 | 4,096 | 4,094 | 16 split → |
| /21 | 255.255.248.0 | 2,048 | 2,046 | 32 split → |
| /22 | 255.255.252.0 | 1,024 | 1,022 | 64 split → |
| /23 | 255.255.254.0 | 512 | 510 | 128 split → |
| /24 | 255.255.255.0 | 256 | 254 | 256 split → |
| /25 | 255.255.255.128 | 128 | 126 | 512 split → |
| /26 | 255.255.255.192 | 64 | 62 | 1,024 split → |
| /27 | 255.255.255.224 | 32 | 30 | 2,048 split → |
| /28 | 255.255.255.240 | 16 | 14 | 4,096 split → |
| /29 | 255.255.255.248 | 8 | 6 | 8,192 split → |
| /30 | 255.255.255.252 | 4 | 2 | 16,384 split → |
| /31 | 255.255.255.254 | 2 | 2 | 32,768 split → |
| /32 | 255.255.255.255 | 1 | 1 | 65,536 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.