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)10.20.0.0/15
network10.20.0.0/15
broadcast10.21.255.255
first host10.20.0.1
last host10.21.255.254
subnet mask255.254.0.0
wildcard0.1.255.255
addresses131,072
usable hosts131,070
classA
ipcalc 10.20.0.0/15
address00001010.00010100.00000000.00000000
subnet mask11111111.11111110.00000000.00000000
network00001010.00010100.00000000.00000000
broadcast00001010.00010101.11111111.11111111
green = network part, grey = host part
hex0x0a140000
decimal169082880
reverse dns0.0.20.10.in-addr.arpa
ipv4-mapped::ffff:a14:0
/15 split into /24 · 512 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.20.0.0/24 | 10.20.0.1 – 10.20.0.254 | 10.20.0.255 |
| 2 | 10.20.1.0/24 | 10.20.1.1 – 10.20.1.254 | 10.20.1.255 |
| 3 | 10.20.2.0/24 | 10.20.2.1 – 10.20.2.254 | 10.20.2.255 |
| 4 | 10.20.3.0/24 | 10.20.3.1 – 10.20.3.254 | 10.20.3.255 |
| 5 | 10.20.4.0/24 | 10.20.4.1 – 10.20.4.254 | 10.20.4.255 |
| 6 | 10.20.5.0/24 | 10.20.5.1 – 10.20.5.254 | 10.20.5.255 |
| 7 | 10.20.6.0/24 | 10.20.6.1 – 10.20.6.254 | 10.20.6.255 |
| 8 | 10.20.7.0/24 | 10.20.7.1 – 10.20.7.254 | 10.20.7.255 |
| 9 | 10.20.8.0/24 | 10.20.8.1 – 10.20.8.254 | 10.20.8.255 |
| 10 | 10.20.9.0/24 | 10.20.9.1 – 10.20.9.254 | 10.20.9.255 |
| 11 | 10.20.10.0/24 | 10.20.10.1 – 10.20.10.254 | 10.20.10.255 |
| 12 | 10.20.11.0/24 | 10.20.11.1 – 10.20.11.254 | 10.20.11.255 |
| 13 | 10.20.12.0/24 | 10.20.12.1 – 10.20.12.254 | 10.20.12.255 |
| 14 | 10.20.13.0/24 | 10.20.13.1 – 10.20.13.254 | 10.20.13.255 |
| 15 | 10.20.14.0/24 | 10.20.14.1 – 10.20.14.254 | 10.20.14.255 |
| 16 | 10.20.15.0/24 | 10.20.15.1 – 10.20.15.254 | 10.20.15.255 |
| 17 | 10.20.16.0/24 | 10.20.16.1 – 10.20.16.254 | 10.20.16.255 |
| 18 | 10.20.17.0/24 | 10.20.17.1 – 10.20.17.254 | 10.20.17.255 |
| 19 | 10.20.18.0/24 | 10.20.18.1 – 10.20.18.254 | 10.20.18.255 |
| 20 | 10.20.19.0/24 | 10.20.19.1 – 10.20.19.254 | 10.20.19.255 |
| 21 | 10.20.20.0/24 | 10.20.20.1 – 10.20.20.254 | 10.20.20.255 |
| 22 | 10.20.21.0/24 | 10.20.21.1 – 10.20.21.254 | 10.20.21.255 |
| 23 | 10.20.22.0/24 | 10.20.22.1 – 10.20.22.254 | 10.20.22.255 |
| 24 | 10.20.23.0/24 | 10.20.23.1 – 10.20.23.254 | 10.20.23.255 |
| 25 | 10.20.24.0/24 | 10.20.24.1 – 10.20.24.254 | 10.20.24.255 |
| 26 | 10.20.25.0/24 | 10.20.25.1 – 10.20.25.254 | 10.20.25.255 |
| 27 | 10.20.26.0/24 | 10.20.26.1 – 10.20.26.254 | 10.20.26.255 |
| 28 | 10.20.27.0/24 | 10.20.27.1 – 10.20.27.254 | 10.20.27.255 |
| 29 | 10.20.28.0/24 | 10.20.28.1 – 10.20.28.254 | 10.20.28.255 |
| 30 | 10.20.29.0/24 | 10.20.29.1 – 10.20.29.254 | 10.20.29.255 |
| 31 | 10.20.30.0/24 | 10.20.30.1 – 10.20.30.254 | 10.20.30.255 |
| 32 | 10.20.31.0/24 | 10.20.31.1 – 10.20.31.254 | 10.20.31.255 |
| 33 | 10.20.32.0/24 | 10.20.32.1 – 10.20.32.254 | 10.20.32.255 |
| 34 | 10.20.33.0/24 | 10.20.33.1 – 10.20.33.254 | 10.20.33.255 |
| 35 | 10.20.34.0/24 | 10.20.34.1 – 10.20.34.254 | 10.20.34.255 |
| 36 | 10.20.35.0/24 | 10.20.35.1 – 10.20.35.254 | 10.20.35.255 |
| 37 | 10.20.36.0/24 | 10.20.36.1 – 10.20.36.254 | 10.20.36.255 |
| 38 | 10.20.37.0/24 | 10.20.37.1 – 10.20.37.254 | 10.20.37.255 |
| 39 | 10.20.38.0/24 | 10.20.38.1 – 10.20.38.254 | 10.20.38.255 |
| 40 | 10.20.39.0/24 | 10.20.39.1 – 10.20.39.254 | 10.20.39.255 |
| 41 | 10.20.40.0/24 | 10.20.40.1 – 10.20.40.254 | 10.20.40.255 |
| 42 | 10.20.41.0/24 | 10.20.41.1 – 10.20.41.254 | 10.20.41.255 |
| 43 | 10.20.42.0/24 | 10.20.42.1 – 10.20.42.254 | 10.20.42.255 |
| 44 | 10.20.43.0/24 | 10.20.43.1 – 10.20.43.254 | 10.20.43.255 |
| 45 | 10.20.44.0/24 | 10.20.44.1 – 10.20.44.254 | 10.20.44.255 |
| 46 | 10.20.45.0/24 | 10.20.45.1 – 10.20.45.254 | 10.20.45.255 |
| 47 | 10.20.46.0/24 | 10.20.46.1 – 10.20.46.254 | 10.20.46.255 |
| 48 | 10.20.47.0/24 | 10.20.47.1 – 10.20.47.254 | 10.20.47.255 |
| 49 | 10.20.48.0/24 | 10.20.48.1 – 10.20.48.254 | 10.20.48.255 |
| 50 | 10.20.49.0/24 | 10.20.49.1 – 10.20.49.254 | 10.20.49.255 |
| 51 | 10.20.50.0/24 | 10.20.50.1 – 10.20.50.254 | 10.20.50.255 |
| 52 | 10.20.51.0/24 | 10.20.51.1 – 10.20.51.254 | 10.20.51.255 |
| 53 | 10.20.52.0/24 | 10.20.52.1 – 10.20.52.254 | 10.20.52.255 |
| 54 | 10.20.53.0/24 | 10.20.53.1 – 10.20.53.254 | 10.20.53.255 |
| 55 | 10.20.54.0/24 | 10.20.54.1 – 10.20.54.254 | 10.20.54.255 |
| 56 | 10.20.55.0/24 | 10.20.55.1 – 10.20.55.254 | 10.20.55.255 |
| 57 | 10.20.56.0/24 | 10.20.56.1 – 10.20.56.254 | 10.20.56.255 |
| 58 | 10.20.57.0/24 | 10.20.57.1 – 10.20.57.254 | 10.20.57.255 |
| 59 | 10.20.58.0/24 | 10.20.58.1 – 10.20.58.254 | 10.20.58.255 |
| 60 | 10.20.59.0/24 | 10.20.59.1 – 10.20.59.254 | 10.20.59.255 |
| 61 | 10.20.60.0/24 | 10.20.60.1 – 10.20.60.254 | 10.20.60.255 |
| 62 | 10.20.61.0/24 | 10.20.61.1 – 10.20.61.254 | 10.20.61.255 |
| 63 | 10.20.62.0/24 | 10.20.62.1 – 10.20.62.254 | 10.20.62.255 |
| 64 | 10.20.63.0/24 | 10.20.63.1 – 10.20.63.254 | 10.20.63.255 |
| 65 | 10.20.64.0/24 | 10.20.64.1 – 10.20.64.254 | 10.20.64.255 |
| 66 | 10.20.65.0/24 | 10.20.65.1 – 10.20.65.254 | 10.20.65.255 |
| 67 | 10.20.66.0/24 | 10.20.66.1 – 10.20.66.254 | 10.20.66.255 |
| 68 | 10.20.67.0/24 | 10.20.67.1 – 10.20.67.254 | 10.20.67.255 |
| 69 | 10.20.68.0/24 | 10.20.68.1 – 10.20.68.254 | 10.20.68.255 |
| 70 | 10.20.69.0/24 | 10.20.69.1 – 10.20.69.254 | 10.20.69.255 |
| 71 | 10.20.70.0/24 | 10.20.70.1 – 10.20.70.254 | 10.20.70.255 |
| 72 | 10.20.71.0/24 | 10.20.71.1 – 10.20.71.254 | 10.20.71.255 |
| 73 | 10.20.72.0/24 | 10.20.72.1 – 10.20.72.254 | 10.20.72.255 |
| 74 | 10.20.73.0/24 | 10.20.73.1 – 10.20.73.254 | 10.20.73.255 |
| 75 | 10.20.74.0/24 | 10.20.74.1 – 10.20.74.254 | 10.20.74.255 |
| 76 | 10.20.75.0/24 | 10.20.75.1 – 10.20.75.254 | 10.20.75.255 |
| 77 | 10.20.76.0/24 | 10.20.76.1 – 10.20.76.254 | 10.20.76.255 |
| 78 | 10.20.77.0/24 | 10.20.77.1 – 10.20.77.254 | 10.20.77.255 |
| 79 | 10.20.78.0/24 | 10.20.78.1 – 10.20.78.254 | 10.20.78.255 |
| 80 | 10.20.79.0/24 | 10.20.79.1 – 10.20.79.254 | 10.20.79.255 |
| 81 | 10.20.80.0/24 | 10.20.80.1 – 10.20.80.254 | 10.20.80.255 |
| 82 | 10.20.81.0/24 | 10.20.81.1 – 10.20.81.254 | 10.20.81.255 |
| 83 | 10.20.82.0/24 | 10.20.82.1 – 10.20.82.254 | 10.20.82.255 |
| 84 | 10.20.83.0/24 | 10.20.83.1 – 10.20.83.254 | 10.20.83.255 |
| 85 | 10.20.84.0/24 | 10.20.84.1 – 10.20.84.254 | 10.20.84.255 |
| 86 | 10.20.85.0/24 | 10.20.85.1 – 10.20.85.254 | 10.20.85.255 |
| 87 | 10.20.86.0/24 | 10.20.86.1 – 10.20.86.254 | 10.20.86.255 |
| 88 | 10.20.87.0/24 | 10.20.87.1 – 10.20.87.254 | 10.20.87.255 |
| 89 | 10.20.88.0/24 | 10.20.88.1 – 10.20.88.254 | 10.20.88.255 |
| 90 | 10.20.89.0/24 | 10.20.89.1 – 10.20.89.254 | 10.20.89.255 |
| 91 | 10.20.90.0/24 | 10.20.90.1 – 10.20.90.254 | 10.20.90.255 |
| 92 | 10.20.91.0/24 | 10.20.91.1 – 10.20.91.254 | 10.20.91.255 |
| 93 | 10.20.92.0/24 | 10.20.92.1 – 10.20.92.254 | 10.20.92.255 |
| 94 | 10.20.93.0/24 | 10.20.93.1 – 10.20.93.254 | 10.20.93.255 |
| 95 | 10.20.94.0/24 | 10.20.94.1 – 10.20.94.254 | 10.20.94.255 |
| 96 | 10.20.95.0/24 | 10.20.95.1 – 10.20.95.254 | 10.20.95.255 |
| 97 | 10.20.96.0/24 | 10.20.96.1 – 10.20.96.254 | 10.20.96.255 |
| 98 | 10.20.97.0/24 | 10.20.97.1 – 10.20.97.254 | 10.20.97.255 |
| 99 | 10.20.98.0/24 | 10.20.98.1 – 10.20.98.254 | 10.20.98.255 |
| 100 | 10.20.99.0/24 | 10.20.99.1 – 10.20.99.254 | 10.20.99.255 |
| 101 | 10.20.100.0/24 | 10.20.100.1 – 10.20.100.254 | 10.20.100.255 |
| 102 | 10.20.101.0/24 | 10.20.101.1 – 10.20.101.254 | 10.20.101.255 |
| 103 | 10.20.102.0/24 | 10.20.102.1 – 10.20.102.254 | 10.20.102.255 |
| 104 | 10.20.103.0/24 | 10.20.103.1 – 10.20.103.254 | 10.20.103.255 |
| 105 | 10.20.104.0/24 | 10.20.104.1 – 10.20.104.254 | 10.20.104.255 |
| 106 | 10.20.105.0/24 | 10.20.105.1 – 10.20.105.254 | 10.20.105.255 |
| 107 | 10.20.106.0/24 | 10.20.106.1 – 10.20.106.254 | 10.20.106.255 |
| 108 | 10.20.107.0/24 | 10.20.107.1 – 10.20.107.254 | 10.20.107.255 |
| 109 | 10.20.108.0/24 | 10.20.108.1 – 10.20.108.254 | 10.20.108.255 |
| 110 | 10.20.109.0/24 | 10.20.109.1 – 10.20.109.254 | 10.20.109.255 |
| 111 | 10.20.110.0/24 | 10.20.110.1 – 10.20.110.254 | 10.20.110.255 |
| 112 | 10.20.111.0/24 | 10.20.111.1 – 10.20.111.254 | 10.20.111.255 |
| 113 | 10.20.112.0/24 | 10.20.112.1 – 10.20.112.254 | 10.20.112.255 |
| 114 | 10.20.113.0/24 | 10.20.113.1 – 10.20.113.254 | 10.20.113.255 |
| 115 | 10.20.114.0/24 | 10.20.114.1 – 10.20.114.254 | 10.20.114.255 |
| 116 | 10.20.115.0/24 | 10.20.115.1 – 10.20.115.254 | 10.20.115.255 |
| 117 | 10.20.116.0/24 | 10.20.116.1 – 10.20.116.254 | 10.20.116.255 |
| 118 | 10.20.117.0/24 | 10.20.117.1 – 10.20.117.254 | 10.20.117.255 |
| 119 | 10.20.118.0/24 | 10.20.118.1 – 10.20.118.254 | 10.20.118.255 |
| 120 | 10.20.119.0/24 | 10.20.119.1 – 10.20.119.254 | 10.20.119.255 |
| 121 | 10.20.120.0/24 | 10.20.120.1 – 10.20.120.254 | 10.20.120.255 |
| 122 | 10.20.121.0/24 | 10.20.121.1 – 10.20.121.254 | 10.20.121.255 |
| 123 | 10.20.122.0/24 | 10.20.122.1 – 10.20.122.254 | 10.20.122.255 |
| 124 | 10.20.123.0/24 | 10.20.123.1 – 10.20.123.254 | 10.20.123.255 |
| 125 | 10.20.124.0/24 | 10.20.124.1 – 10.20.124.254 | 10.20.124.255 |
| 126 | 10.20.125.0/24 | 10.20.125.1 – 10.20.125.254 | 10.20.125.255 |
| 127 | 10.20.126.0/24 | 10.20.126.1 – 10.20.126.254 | 10.20.126.255 |
| 128 | 10.20.127.0/24 | 10.20.127.1 – 10.20.127.254 | 10.20.127.255 |
| 129 | 10.20.128.0/24 | 10.20.128.1 – 10.20.128.254 | 10.20.128.255 |
| 130 | 10.20.129.0/24 | 10.20.129.1 – 10.20.129.254 | 10.20.129.255 |
| 131 | 10.20.130.0/24 | 10.20.130.1 – 10.20.130.254 | 10.20.130.255 |
| 132 | 10.20.131.0/24 | 10.20.131.1 – 10.20.131.254 | 10.20.131.255 |
| 133 | 10.20.132.0/24 | 10.20.132.1 – 10.20.132.254 | 10.20.132.255 |
| 134 | 10.20.133.0/24 | 10.20.133.1 – 10.20.133.254 | 10.20.133.255 |
| 135 | 10.20.134.0/24 | 10.20.134.1 – 10.20.134.254 | 10.20.134.255 |
| 136 | 10.20.135.0/24 | 10.20.135.1 – 10.20.135.254 | 10.20.135.255 |
| 137 | 10.20.136.0/24 | 10.20.136.1 – 10.20.136.254 | 10.20.136.255 |
| 138 | 10.20.137.0/24 | 10.20.137.1 – 10.20.137.254 | 10.20.137.255 |
| 139 | 10.20.138.0/24 | 10.20.138.1 – 10.20.138.254 | 10.20.138.255 |
| 140 | 10.20.139.0/24 | 10.20.139.1 – 10.20.139.254 | 10.20.139.255 |
| 141 | 10.20.140.0/24 | 10.20.140.1 – 10.20.140.254 | 10.20.140.255 |
| 142 | 10.20.141.0/24 | 10.20.141.1 – 10.20.141.254 | 10.20.141.255 |
| 143 | 10.20.142.0/24 | 10.20.142.1 – 10.20.142.254 | 10.20.142.255 |
| 144 | 10.20.143.0/24 | 10.20.143.1 – 10.20.143.254 | 10.20.143.255 |
| 145 | 10.20.144.0/24 | 10.20.144.1 – 10.20.144.254 | 10.20.144.255 |
| 146 | 10.20.145.0/24 | 10.20.145.1 – 10.20.145.254 | 10.20.145.255 |
| 147 | 10.20.146.0/24 | 10.20.146.1 – 10.20.146.254 | 10.20.146.255 |
| 148 | 10.20.147.0/24 | 10.20.147.1 – 10.20.147.254 | 10.20.147.255 |
| 149 | 10.20.148.0/24 | 10.20.148.1 – 10.20.148.254 | 10.20.148.255 |
| 150 | 10.20.149.0/24 | 10.20.149.1 – 10.20.149.254 | 10.20.149.255 |
| 151 | 10.20.150.0/24 | 10.20.150.1 – 10.20.150.254 | 10.20.150.255 |
| 152 | 10.20.151.0/24 | 10.20.151.1 – 10.20.151.254 | 10.20.151.255 |
| 153 | 10.20.152.0/24 | 10.20.152.1 – 10.20.152.254 | 10.20.152.255 |
| 154 | 10.20.153.0/24 | 10.20.153.1 – 10.20.153.254 | 10.20.153.255 |
| 155 | 10.20.154.0/24 | 10.20.154.1 – 10.20.154.254 | 10.20.154.255 |
| 156 | 10.20.155.0/24 | 10.20.155.1 – 10.20.155.254 | 10.20.155.255 |
| 157 | 10.20.156.0/24 | 10.20.156.1 – 10.20.156.254 | 10.20.156.255 |
| 158 | 10.20.157.0/24 | 10.20.157.1 – 10.20.157.254 | 10.20.157.255 |
| 159 | 10.20.158.0/24 | 10.20.158.1 – 10.20.158.254 | 10.20.158.255 |
| 160 | 10.20.159.0/24 | 10.20.159.1 – 10.20.159.254 | 10.20.159.255 |
| 161 | 10.20.160.0/24 | 10.20.160.1 – 10.20.160.254 | 10.20.160.255 |
| 162 | 10.20.161.0/24 | 10.20.161.1 – 10.20.161.254 | 10.20.161.255 |
| 163 | 10.20.162.0/24 | 10.20.162.1 – 10.20.162.254 | 10.20.162.255 |
| 164 | 10.20.163.0/24 | 10.20.163.1 – 10.20.163.254 | 10.20.163.255 |
| 165 | 10.20.164.0/24 | 10.20.164.1 – 10.20.164.254 | 10.20.164.255 |
| 166 | 10.20.165.0/24 | 10.20.165.1 – 10.20.165.254 | 10.20.165.255 |
| 167 | 10.20.166.0/24 | 10.20.166.1 – 10.20.166.254 | 10.20.166.255 |
| 168 | 10.20.167.0/24 | 10.20.167.1 – 10.20.167.254 | 10.20.167.255 |
| 169 | 10.20.168.0/24 | 10.20.168.1 – 10.20.168.254 | 10.20.168.255 |
| 170 | 10.20.169.0/24 | 10.20.169.1 – 10.20.169.254 | 10.20.169.255 |
| 171 | 10.20.170.0/24 | 10.20.170.1 – 10.20.170.254 | 10.20.170.255 |
| 172 | 10.20.171.0/24 | 10.20.171.1 – 10.20.171.254 | 10.20.171.255 |
| 173 | 10.20.172.0/24 | 10.20.172.1 – 10.20.172.254 | 10.20.172.255 |
| 174 | 10.20.173.0/24 | 10.20.173.1 – 10.20.173.254 | 10.20.173.255 |
| 175 | 10.20.174.0/24 | 10.20.174.1 – 10.20.174.254 | 10.20.174.255 |
| 176 | 10.20.175.0/24 | 10.20.175.1 – 10.20.175.254 | 10.20.175.255 |
| 177 | 10.20.176.0/24 | 10.20.176.1 – 10.20.176.254 | 10.20.176.255 |
| 178 | 10.20.177.0/24 | 10.20.177.1 – 10.20.177.254 | 10.20.177.255 |
| 179 | 10.20.178.0/24 | 10.20.178.1 – 10.20.178.254 | 10.20.178.255 |
| 180 | 10.20.179.0/24 | 10.20.179.1 – 10.20.179.254 | 10.20.179.255 |
| 181 | 10.20.180.0/24 | 10.20.180.1 – 10.20.180.254 | 10.20.180.255 |
| 182 | 10.20.181.0/24 | 10.20.181.1 – 10.20.181.254 | 10.20.181.255 |
| 183 | 10.20.182.0/24 | 10.20.182.1 – 10.20.182.254 | 10.20.182.255 |
| 184 | 10.20.183.0/24 | 10.20.183.1 – 10.20.183.254 | 10.20.183.255 |
| 185 | 10.20.184.0/24 | 10.20.184.1 – 10.20.184.254 | 10.20.184.255 |
| 186 | 10.20.185.0/24 | 10.20.185.1 – 10.20.185.254 | 10.20.185.255 |
| 187 | 10.20.186.0/24 | 10.20.186.1 – 10.20.186.254 | 10.20.186.255 |
| 188 | 10.20.187.0/24 | 10.20.187.1 – 10.20.187.254 | 10.20.187.255 |
| 189 | 10.20.188.0/24 | 10.20.188.1 – 10.20.188.254 | 10.20.188.255 |
| 190 | 10.20.189.0/24 | 10.20.189.1 – 10.20.189.254 | 10.20.189.255 |
| 191 | 10.20.190.0/24 | 10.20.190.1 – 10.20.190.254 | 10.20.190.255 |
| 192 | 10.20.191.0/24 | 10.20.191.1 – 10.20.191.254 | 10.20.191.255 |
| 193 | 10.20.192.0/24 | 10.20.192.1 – 10.20.192.254 | 10.20.192.255 |
| 194 | 10.20.193.0/24 | 10.20.193.1 – 10.20.193.254 | 10.20.193.255 |
| 195 | 10.20.194.0/24 | 10.20.194.1 – 10.20.194.254 | 10.20.194.255 |
| 196 | 10.20.195.0/24 | 10.20.195.1 – 10.20.195.254 | 10.20.195.255 |
| 197 | 10.20.196.0/24 | 10.20.196.1 – 10.20.196.254 | 10.20.196.255 |
| 198 | 10.20.197.0/24 | 10.20.197.1 – 10.20.197.254 | 10.20.197.255 |
| 199 | 10.20.198.0/24 | 10.20.198.1 – 10.20.198.254 | 10.20.198.255 |
| 200 | 10.20.199.0/24 | 10.20.199.1 – 10.20.199.254 | 10.20.199.255 |
| 201 | 10.20.200.0/24 | 10.20.200.1 – 10.20.200.254 | 10.20.200.255 |
| 202 | 10.20.201.0/24 | 10.20.201.1 – 10.20.201.254 | 10.20.201.255 |
| 203 | 10.20.202.0/24 | 10.20.202.1 – 10.20.202.254 | 10.20.202.255 |
| 204 | 10.20.203.0/24 | 10.20.203.1 – 10.20.203.254 | 10.20.203.255 |
| 205 | 10.20.204.0/24 | 10.20.204.1 – 10.20.204.254 | 10.20.204.255 |
| 206 | 10.20.205.0/24 | 10.20.205.1 – 10.20.205.254 | 10.20.205.255 |
| 207 | 10.20.206.0/24 | 10.20.206.1 – 10.20.206.254 | 10.20.206.255 |
| 208 | 10.20.207.0/24 | 10.20.207.1 – 10.20.207.254 | 10.20.207.255 |
| 209 | 10.20.208.0/24 | 10.20.208.1 – 10.20.208.254 | 10.20.208.255 |
| 210 | 10.20.209.0/24 | 10.20.209.1 – 10.20.209.254 | 10.20.209.255 |
| 211 | 10.20.210.0/24 | 10.20.210.1 – 10.20.210.254 | 10.20.210.255 |
| 212 | 10.20.211.0/24 | 10.20.211.1 – 10.20.211.254 | 10.20.211.255 |
| 213 | 10.20.212.0/24 | 10.20.212.1 – 10.20.212.254 | 10.20.212.255 |
| 214 | 10.20.213.0/24 | 10.20.213.1 – 10.20.213.254 | 10.20.213.255 |
| 215 | 10.20.214.0/24 | 10.20.214.1 – 10.20.214.254 | 10.20.214.255 |
| 216 | 10.20.215.0/24 | 10.20.215.1 – 10.20.215.254 | 10.20.215.255 |
| 217 | 10.20.216.0/24 | 10.20.216.1 – 10.20.216.254 | 10.20.216.255 |
| 218 | 10.20.217.0/24 | 10.20.217.1 – 10.20.217.254 | 10.20.217.255 |
| 219 | 10.20.218.0/24 | 10.20.218.1 – 10.20.218.254 | 10.20.218.255 |
| 220 | 10.20.219.0/24 | 10.20.219.1 – 10.20.219.254 | 10.20.219.255 |
| 221 | 10.20.220.0/24 | 10.20.220.1 – 10.20.220.254 | 10.20.220.255 |
| 222 | 10.20.221.0/24 | 10.20.221.1 – 10.20.221.254 | 10.20.221.255 |
| 223 | 10.20.222.0/24 | 10.20.222.1 – 10.20.222.254 | 10.20.222.255 |
| 224 | 10.20.223.0/24 | 10.20.223.1 – 10.20.223.254 | 10.20.223.255 |
| 225 | 10.20.224.0/24 | 10.20.224.1 – 10.20.224.254 | 10.20.224.255 |
| 226 | 10.20.225.0/24 | 10.20.225.1 – 10.20.225.254 | 10.20.225.255 |
| 227 | 10.20.226.0/24 | 10.20.226.1 – 10.20.226.254 | 10.20.226.255 |
| 228 | 10.20.227.0/24 | 10.20.227.1 – 10.20.227.254 | 10.20.227.255 |
| 229 | 10.20.228.0/24 | 10.20.228.1 – 10.20.228.254 | 10.20.228.255 |
| 230 | 10.20.229.0/24 | 10.20.229.1 – 10.20.229.254 | 10.20.229.255 |
| 231 | 10.20.230.0/24 | 10.20.230.1 – 10.20.230.254 | 10.20.230.255 |
| 232 | 10.20.231.0/24 | 10.20.231.1 – 10.20.231.254 | 10.20.231.255 |
| 233 | 10.20.232.0/24 | 10.20.232.1 – 10.20.232.254 | 10.20.232.255 |
| 234 | 10.20.233.0/24 | 10.20.233.1 – 10.20.233.254 | 10.20.233.255 |
| 235 | 10.20.234.0/24 | 10.20.234.1 – 10.20.234.254 | 10.20.234.255 |
| 236 | 10.20.235.0/24 | 10.20.235.1 – 10.20.235.254 | 10.20.235.255 |
| 237 | 10.20.236.0/24 | 10.20.236.1 – 10.20.236.254 | 10.20.236.255 |
| 238 | 10.20.237.0/24 | 10.20.237.1 – 10.20.237.254 | 10.20.237.255 |
| 239 | 10.20.238.0/24 | 10.20.238.1 – 10.20.238.254 | 10.20.238.255 |
| 240 | 10.20.239.0/24 | 10.20.239.1 – 10.20.239.254 | 10.20.239.255 |
| 241 | 10.20.240.0/24 | 10.20.240.1 – 10.20.240.254 | 10.20.240.255 |
| 242 | 10.20.241.0/24 | 10.20.241.1 – 10.20.241.254 | 10.20.241.255 |
| 243 | 10.20.242.0/24 | 10.20.242.1 – 10.20.242.254 | 10.20.242.255 |
| 244 | 10.20.243.0/24 | 10.20.243.1 – 10.20.243.254 | 10.20.243.255 |
| 245 | 10.20.244.0/24 | 10.20.244.1 – 10.20.244.254 | 10.20.244.255 |
| 246 | 10.20.245.0/24 | 10.20.245.1 – 10.20.245.254 | 10.20.245.255 |
| 247 | 10.20.246.0/24 | 10.20.246.1 – 10.20.246.254 | 10.20.246.255 |
| 248 | 10.20.247.0/24 | 10.20.247.1 – 10.20.247.254 | 10.20.247.255 |
| 249 | 10.20.248.0/24 | 10.20.248.1 – 10.20.248.254 | 10.20.248.255 |
| 250 | 10.20.249.0/24 | 10.20.249.1 – 10.20.249.254 | 10.20.249.255 |
| 251 | 10.20.250.0/24 | 10.20.250.1 – 10.20.250.254 | 10.20.250.255 |
| 252 | 10.20.251.0/24 | 10.20.251.1 – 10.20.251.254 | 10.20.251.255 |
| 253 | 10.20.252.0/24 | 10.20.252.1 – 10.20.252.254 | 10.20.252.255 |
| 254 | 10.20.253.0/24 | 10.20.253.1 – 10.20.253.254 | 10.20.253.255 |
| 255 | 10.20.254.0/24 | 10.20.254.1 – 10.20.254.254 | 10.20.254.255 |
| 256 | 10.20.255.0/24 | 10.20.255.1 – 10.20.255.254 | 10.20.255.255 |
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 /15 |
|---|---|---|---|---|
| /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 | 1 |
| /16 | 255.255.0.0 | 65,536 | 65,534 | 2 split → |
| /17 | 255.255.128.0 | 32,768 | 32,766 | 4 split → |
| /18 | 255.255.192.0 | 16,384 | 16,382 | 8 split → |
| /19 | 255.255.224.0 | 8,192 | 8,190 | 16 split → |
| /20 | 255.255.240.0 | 4,096 | 4,094 | 32 split → |
| /21 | 255.255.248.0 | 2,048 | 2,046 | 64 split → |
| /22 | 255.255.252.0 | 1,024 | 1,022 | 128 split → |
| /23 | 255.255.254.0 | 512 | 510 | 256 split → |
| /24 | 255.255.255.0 | 256 | 254 | 512 split → |
| /25 | 255.255.255.128 | 128 | 126 | 1,024 split → |
| /26 | 255.255.255.192 | 64 | 62 | 2,048 split → |
| /27 | 255.255.255.224 | 32 | 30 | 4,096 split → |
| /28 | 255.255.255.240 | 16 | 14 | 8,192 split → |
| /29 | 255.255.255.248 | 8 | 6 | 16,384 split → |
| /30 | 255.255.255.252 | 4 | 2 | 32,768 split → |
| /31 | 255.255.255.254 | 2 | 2 | 65,536 split → |
| /32 | 255.255.255.255 | 1 | 1 | 131,072 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.