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)10.3.200.0/21
network10.3.200.0/21
broadcast10.3.207.255
first host10.3.200.1
last host10.3.207.254
subnet mask255.255.248.0
wildcard0.0.7.255
addresses2,048
usable hosts2,046
classA
ipcalc 10.3.200.0/21
address00001010.00000011.11001000.00000000
subnet mask11111111.11111111.11111000.00000000
network00001010.00000011.11001000.00000000
broadcast00001010.00000011.11001111.11111111
green = network part, grey = host part
hex0x0a03c800
decimal168019968
reverse dns0.200.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:c800
/21 split into /29 · 256 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.3.200.0/29 | 10.3.200.1 – 10.3.200.6 | 10.3.200.7 |
| 2 | 10.3.200.8/29 | 10.3.200.9 – 10.3.200.14 | 10.3.200.15 |
| 3 | 10.3.200.16/29 | 10.3.200.17 – 10.3.200.22 | 10.3.200.23 |
| 4 | 10.3.200.24/29 | 10.3.200.25 – 10.3.200.30 | 10.3.200.31 |
| 5 | 10.3.200.32/29 | 10.3.200.33 – 10.3.200.38 | 10.3.200.39 |
| 6 | 10.3.200.40/29 | 10.3.200.41 – 10.3.200.46 | 10.3.200.47 |
| 7 | 10.3.200.48/29 | 10.3.200.49 – 10.3.200.54 | 10.3.200.55 |
| 8 | 10.3.200.56/29 | 10.3.200.57 – 10.3.200.62 | 10.3.200.63 |
| 9 | 10.3.200.64/29 | 10.3.200.65 – 10.3.200.70 | 10.3.200.71 |
| 10 | 10.3.200.72/29 | 10.3.200.73 – 10.3.200.78 | 10.3.200.79 |
| 11 | 10.3.200.80/29 | 10.3.200.81 – 10.3.200.86 | 10.3.200.87 |
| 12 | 10.3.200.88/29 | 10.3.200.89 – 10.3.200.94 | 10.3.200.95 |
| 13 | 10.3.200.96/29 | 10.3.200.97 – 10.3.200.102 | 10.3.200.103 |
| 14 | 10.3.200.104/29 | 10.3.200.105 – 10.3.200.110 | 10.3.200.111 |
| 15 | 10.3.200.112/29 | 10.3.200.113 – 10.3.200.118 | 10.3.200.119 |
| 16 | 10.3.200.120/29 | 10.3.200.121 – 10.3.200.126 | 10.3.200.127 |
| 17 | 10.3.200.128/29 | 10.3.200.129 – 10.3.200.134 | 10.3.200.135 |
| 18 | 10.3.200.136/29 | 10.3.200.137 – 10.3.200.142 | 10.3.200.143 |
| 19 | 10.3.200.144/29 | 10.3.200.145 – 10.3.200.150 | 10.3.200.151 |
| 20 | 10.3.200.152/29 | 10.3.200.153 – 10.3.200.158 | 10.3.200.159 |
| 21 | 10.3.200.160/29 | 10.3.200.161 – 10.3.200.166 | 10.3.200.167 |
| 22 | 10.3.200.168/29 | 10.3.200.169 – 10.3.200.174 | 10.3.200.175 |
| 23 | 10.3.200.176/29 | 10.3.200.177 – 10.3.200.182 | 10.3.200.183 |
| 24 | 10.3.200.184/29 | 10.3.200.185 – 10.3.200.190 | 10.3.200.191 |
| 25 | 10.3.200.192/29 | 10.3.200.193 – 10.3.200.198 | 10.3.200.199 |
| 26 | 10.3.200.200/29 | 10.3.200.201 – 10.3.200.206 | 10.3.200.207 |
| 27 | 10.3.200.208/29 | 10.3.200.209 – 10.3.200.214 | 10.3.200.215 |
| 28 | 10.3.200.216/29 | 10.3.200.217 – 10.3.200.222 | 10.3.200.223 |
| 29 | 10.3.200.224/29 | 10.3.200.225 – 10.3.200.230 | 10.3.200.231 |
| 30 | 10.3.200.232/29 | 10.3.200.233 – 10.3.200.238 | 10.3.200.239 |
| 31 | 10.3.200.240/29 | 10.3.200.241 – 10.3.200.246 | 10.3.200.247 |
| 32 | 10.3.200.248/29 | 10.3.200.249 – 10.3.200.254 | 10.3.200.255 |
| 33 | 10.3.201.0/29 | 10.3.201.1 – 10.3.201.6 | 10.3.201.7 |
| 34 | 10.3.201.8/29 | 10.3.201.9 – 10.3.201.14 | 10.3.201.15 |
| 35 | 10.3.201.16/29 | 10.3.201.17 – 10.3.201.22 | 10.3.201.23 |
| 36 | 10.3.201.24/29 | 10.3.201.25 – 10.3.201.30 | 10.3.201.31 |
| 37 | 10.3.201.32/29 | 10.3.201.33 – 10.3.201.38 | 10.3.201.39 |
| 38 | 10.3.201.40/29 | 10.3.201.41 – 10.3.201.46 | 10.3.201.47 |
| 39 | 10.3.201.48/29 | 10.3.201.49 – 10.3.201.54 | 10.3.201.55 |
| 40 | 10.3.201.56/29 | 10.3.201.57 – 10.3.201.62 | 10.3.201.63 |
| 41 | 10.3.201.64/29 | 10.3.201.65 – 10.3.201.70 | 10.3.201.71 |
| 42 | 10.3.201.72/29 | 10.3.201.73 – 10.3.201.78 | 10.3.201.79 |
| 43 | 10.3.201.80/29 | 10.3.201.81 – 10.3.201.86 | 10.3.201.87 |
| 44 | 10.3.201.88/29 | 10.3.201.89 – 10.3.201.94 | 10.3.201.95 |
| 45 | 10.3.201.96/29 | 10.3.201.97 – 10.3.201.102 | 10.3.201.103 |
| 46 | 10.3.201.104/29 | 10.3.201.105 – 10.3.201.110 | 10.3.201.111 |
| 47 | 10.3.201.112/29 | 10.3.201.113 – 10.3.201.118 | 10.3.201.119 |
| 48 | 10.3.201.120/29 | 10.3.201.121 – 10.3.201.126 | 10.3.201.127 |
| 49 | 10.3.201.128/29 | 10.3.201.129 – 10.3.201.134 | 10.3.201.135 |
| 50 | 10.3.201.136/29 | 10.3.201.137 – 10.3.201.142 | 10.3.201.143 |
| 51 | 10.3.201.144/29 | 10.3.201.145 – 10.3.201.150 | 10.3.201.151 |
| 52 | 10.3.201.152/29 | 10.3.201.153 – 10.3.201.158 | 10.3.201.159 |
| 53 | 10.3.201.160/29 | 10.3.201.161 – 10.3.201.166 | 10.3.201.167 |
| 54 | 10.3.201.168/29 | 10.3.201.169 – 10.3.201.174 | 10.3.201.175 |
| 55 | 10.3.201.176/29 | 10.3.201.177 – 10.3.201.182 | 10.3.201.183 |
| 56 | 10.3.201.184/29 | 10.3.201.185 – 10.3.201.190 | 10.3.201.191 |
| 57 | 10.3.201.192/29 | 10.3.201.193 – 10.3.201.198 | 10.3.201.199 |
| 58 | 10.3.201.200/29 | 10.3.201.201 – 10.3.201.206 | 10.3.201.207 |
| 59 | 10.3.201.208/29 | 10.3.201.209 – 10.3.201.214 | 10.3.201.215 |
| 60 | 10.3.201.216/29 | 10.3.201.217 – 10.3.201.222 | 10.3.201.223 |
| 61 | 10.3.201.224/29 | 10.3.201.225 – 10.3.201.230 | 10.3.201.231 |
| 62 | 10.3.201.232/29 | 10.3.201.233 – 10.3.201.238 | 10.3.201.239 |
| 63 | 10.3.201.240/29 | 10.3.201.241 – 10.3.201.246 | 10.3.201.247 |
| 64 | 10.3.201.248/29 | 10.3.201.249 – 10.3.201.254 | 10.3.201.255 |
| 65 | 10.3.202.0/29 | 10.3.202.1 – 10.3.202.6 | 10.3.202.7 |
| 66 | 10.3.202.8/29 | 10.3.202.9 – 10.3.202.14 | 10.3.202.15 |
| 67 | 10.3.202.16/29 | 10.3.202.17 – 10.3.202.22 | 10.3.202.23 |
| 68 | 10.3.202.24/29 | 10.3.202.25 – 10.3.202.30 | 10.3.202.31 |
| 69 | 10.3.202.32/29 | 10.3.202.33 – 10.3.202.38 | 10.3.202.39 |
| 70 | 10.3.202.40/29 | 10.3.202.41 – 10.3.202.46 | 10.3.202.47 |
| 71 | 10.3.202.48/29 | 10.3.202.49 – 10.3.202.54 | 10.3.202.55 |
| 72 | 10.3.202.56/29 | 10.3.202.57 – 10.3.202.62 | 10.3.202.63 |
| 73 | 10.3.202.64/29 | 10.3.202.65 – 10.3.202.70 | 10.3.202.71 |
| 74 | 10.3.202.72/29 | 10.3.202.73 – 10.3.202.78 | 10.3.202.79 |
| 75 | 10.3.202.80/29 | 10.3.202.81 – 10.3.202.86 | 10.3.202.87 |
| 76 | 10.3.202.88/29 | 10.3.202.89 – 10.3.202.94 | 10.3.202.95 |
| 77 | 10.3.202.96/29 | 10.3.202.97 – 10.3.202.102 | 10.3.202.103 |
| 78 | 10.3.202.104/29 | 10.3.202.105 – 10.3.202.110 | 10.3.202.111 |
| 79 | 10.3.202.112/29 | 10.3.202.113 – 10.3.202.118 | 10.3.202.119 |
| 80 | 10.3.202.120/29 | 10.3.202.121 – 10.3.202.126 | 10.3.202.127 |
| 81 | 10.3.202.128/29 | 10.3.202.129 – 10.3.202.134 | 10.3.202.135 |
| 82 | 10.3.202.136/29 | 10.3.202.137 – 10.3.202.142 | 10.3.202.143 |
| 83 | 10.3.202.144/29 | 10.3.202.145 – 10.3.202.150 | 10.3.202.151 |
| 84 | 10.3.202.152/29 | 10.3.202.153 – 10.3.202.158 | 10.3.202.159 |
| 85 | 10.3.202.160/29 | 10.3.202.161 – 10.3.202.166 | 10.3.202.167 |
| 86 | 10.3.202.168/29 | 10.3.202.169 – 10.3.202.174 | 10.3.202.175 |
| 87 | 10.3.202.176/29 | 10.3.202.177 – 10.3.202.182 | 10.3.202.183 |
| 88 | 10.3.202.184/29 | 10.3.202.185 – 10.3.202.190 | 10.3.202.191 |
| 89 | 10.3.202.192/29 | 10.3.202.193 – 10.3.202.198 | 10.3.202.199 |
| 90 | 10.3.202.200/29 | 10.3.202.201 – 10.3.202.206 | 10.3.202.207 |
| 91 | 10.3.202.208/29 | 10.3.202.209 – 10.3.202.214 | 10.3.202.215 |
| 92 | 10.3.202.216/29 | 10.3.202.217 – 10.3.202.222 | 10.3.202.223 |
| 93 | 10.3.202.224/29 | 10.3.202.225 – 10.3.202.230 | 10.3.202.231 |
| 94 | 10.3.202.232/29 | 10.3.202.233 – 10.3.202.238 | 10.3.202.239 |
| 95 | 10.3.202.240/29 | 10.3.202.241 – 10.3.202.246 | 10.3.202.247 |
| 96 | 10.3.202.248/29 | 10.3.202.249 – 10.3.202.254 | 10.3.202.255 |
| 97 | 10.3.203.0/29 | 10.3.203.1 – 10.3.203.6 | 10.3.203.7 |
| 98 | 10.3.203.8/29 | 10.3.203.9 – 10.3.203.14 | 10.3.203.15 |
| 99 | 10.3.203.16/29 | 10.3.203.17 – 10.3.203.22 | 10.3.203.23 |
| 100 | 10.3.203.24/29 | 10.3.203.25 – 10.3.203.30 | 10.3.203.31 |
| 101 | 10.3.203.32/29 | 10.3.203.33 – 10.3.203.38 | 10.3.203.39 |
| 102 | 10.3.203.40/29 | 10.3.203.41 – 10.3.203.46 | 10.3.203.47 |
| 103 | 10.3.203.48/29 | 10.3.203.49 – 10.3.203.54 | 10.3.203.55 |
| 104 | 10.3.203.56/29 | 10.3.203.57 – 10.3.203.62 | 10.3.203.63 |
| 105 | 10.3.203.64/29 | 10.3.203.65 – 10.3.203.70 | 10.3.203.71 |
| 106 | 10.3.203.72/29 | 10.3.203.73 – 10.3.203.78 | 10.3.203.79 |
| 107 | 10.3.203.80/29 | 10.3.203.81 – 10.3.203.86 | 10.3.203.87 |
| 108 | 10.3.203.88/29 | 10.3.203.89 – 10.3.203.94 | 10.3.203.95 |
| 109 | 10.3.203.96/29 | 10.3.203.97 – 10.3.203.102 | 10.3.203.103 |
| 110 | 10.3.203.104/29 | 10.3.203.105 – 10.3.203.110 | 10.3.203.111 |
| 111 | 10.3.203.112/29 | 10.3.203.113 – 10.3.203.118 | 10.3.203.119 |
| 112 | 10.3.203.120/29 | 10.3.203.121 – 10.3.203.126 | 10.3.203.127 |
| 113 | 10.3.203.128/29 | 10.3.203.129 – 10.3.203.134 | 10.3.203.135 |
| 114 | 10.3.203.136/29 | 10.3.203.137 – 10.3.203.142 | 10.3.203.143 |
| 115 | 10.3.203.144/29 | 10.3.203.145 – 10.3.203.150 | 10.3.203.151 |
| 116 | 10.3.203.152/29 | 10.3.203.153 – 10.3.203.158 | 10.3.203.159 |
| 117 | 10.3.203.160/29 | 10.3.203.161 – 10.3.203.166 | 10.3.203.167 |
| 118 | 10.3.203.168/29 | 10.3.203.169 – 10.3.203.174 | 10.3.203.175 |
| 119 | 10.3.203.176/29 | 10.3.203.177 – 10.3.203.182 | 10.3.203.183 |
| 120 | 10.3.203.184/29 | 10.3.203.185 – 10.3.203.190 | 10.3.203.191 |
| 121 | 10.3.203.192/29 | 10.3.203.193 – 10.3.203.198 | 10.3.203.199 |
| 122 | 10.3.203.200/29 | 10.3.203.201 – 10.3.203.206 | 10.3.203.207 |
| 123 | 10.3.203.208/29 | 10.3.203.209 – 10.3.203.214 | 10.3.203.215 |
| 124 | 10.3.203.216/29 | 10.3.203.217 – 10.3.203.222 | 10.3.203.223 |
| 125 | 10.3.203.224/29 | 10.3.203.225 – 10.3.203.230 | 10.3.203.231 |
| 126 | 10.3.203.232/29 | 10.3.203.233 – 10.3.203.238 | 10.3.203.239 |
| 127 | 10.3.203.240/29 | 10.3.203.241 – 10.3.203.246 | 10.3.203.247 |
| 128 | 10.3.203.248/29 | 10.3.203.249 – 10.3.203.254 | 10.3.203.255 |
| 129 | 10.3.204.0/29 | 10.3.204.1 – 10.3.204.6 | 10.3.204.7 |
| 130 | 10.3.204.8/29 | 10.3.204.9 – 10.3.204.14 | 10.3.204.15 |
| 131 | 10.3.204.16/29 | 10.3.204.17 – 10.3.204.22 | 10.3.204.23 |
| 132 | 10.3.204.24/29 | 10.3.204.25 – 10.3.204.30 | 10.3.204.31 |
| 133 | 10.3.204.32/29 | 10.3.204.33 – 10.3.204.38 | 10.3.204.39 |
| 134 | 10.3.204.40/29 | 10.3.204.41 – 10.3.204.46 | 10.3.204.47 |
| 135 | 10.3.204.48/29 | 10.3.204.49 – 10.3.204.54 | 10.3.204.55 |
| 136 | 10.3.204.56/29 | 10.3.204.57 – 10.3.204.62 | 10.3.204.63 |
| 137 | 10.3.204.64/29 | 10.3.204.65 – 10.3.204.70 | 10.3.204.71 |
| 138 | 10.3.204.72/29 | 10.3.204.73 – 10.3.204.78 | 10.3.204.79 |
| 139 | 10.3.204.80/29 | 10.3.204.81 – 10.3.204.86 | 10.3.204.87 |
| 140 | 10.3.204.88/29 | 10.3.204.89 – 10.3.204.94 | 10.3.204.95 |
| 141 | 10.3.204.96/29 | 10.3.204.97 – 10.3.204.102 | 10.3.204.103 |
| 142 | 10.3.204.104/29 | 10.3.204.105 – 10.3.204.110 | 10.3.204.111 |
| 143 | 10.3.204.112/29 | 10.3.204.113 – 10.3.204.118 | 10.3.204.119 |
| 144 | 10.3.204.120/29 | 10.3.204.121 – 10.3.204.126 | 10.3.204.127 |
| 145 | 10.3.204.128/29 | 10.3.204.129 – 10.3.204.134 | 10.3.204.135 |
| 146 | 10.3.204.136/29 | 10.3.204.137 – 10.3.204.142 | 10.3.204.143 |
| 147 | 10.3.204.144/29 | 10.3.204.145 – 10.3.204.150 | 10.3.204.151 |
| 148 | 10.3.204.152/29 | 10.3.204.153 – 10.3.204.158 | 10.3.204.159 |
| 149 | 10.3.204.160/29 | 10.3.204.161 – 10.3.204.166 | 10.3.204.167 |
| 150 | 10.3.204.168/29 | 10.3.204.169 – 10.3.204.174 | 10.3.204.175 |
| 151 | 10.3.204.176/29 | 10.3.204.177 – 10.3.204.182 | 10.3.204.183 |
| 152 | 10.3.204.184/29 | 10.3.204.185 – 10.3.204.190 | 10.3.204.191 |
| 153 | 10.3.204.192/29 | 10.3.204.193 – 10.3.204.198 | 10.3.204.199 |
| 154 | 10.3.204.200/29 | 10.3.204.201 – 10.3.204.206 | 10.3.204.207 |
| 155 | 10.3.204.208/29 | 10.3.204.209 – 10.3.204.214 | 10.3.204.215 |
| 156 | 10.3.204.216/29 | 10.3.204.217 – 10.3.204.222 | 10.3.204.223 |
| 157 | 10.3.204.224/29 | 10.3.204.225 – 10.3.204.230 | 10.3.204.231 |
| 158 | 10.3.204.232/29 | 10.3.204.233 – 10.3.204.238 | 10.3.204.239 |
| 159 | 10.3.204.240/29 | 10.3.204.241 – 10.3.204.246 | 10.3.204.247 |
| 160 | 10.3.204.248/29 | 10.3.204.249 – 10.3.204.254 | 10.3.204.255 |
| 161 | 10.3.205.0/29 | 10.3.205.1 – 10.3.205.6 | 10.3.205.7 |
| 162 | 10.3.205.8/29 | 10.3.205.9 – 10.3.205.14 | 10.3.205.15 |
| 163 | 10.3.205.16/29 | 10.3.205.17 – 10.3.205.22 | 10.3.205.23 |
| 164 | 10.3.205.24/29 | 10.3.205.25 – 10.3.205.30 | 10.3.205.31 |
| 165 | 10.3.205.32/29 | 10.3.205.33 – 10.3.205.38 | 10.3.205.39 |
| 166 | 10.3.205.40/29 | 10.3.205.41 – 10.3.205.46 | 10.3.205.47 |
| 167 | 10.3.205.48/29 | 10.3.205.49 – 10.3.205.54 | 10.3.205.55 |
| 168 | 10.3.205.56/29 | 10.3.205.57 – 10.3.205.62 | 10.3.205.63 |
| 169 | 10.3.205.64/29 | 10.3.205.65 – 10.3.205.70 | 10.3.205.71 |
| 170 | 10.3.205.72/29 | 10.3.205.73 – 10.3.205.78 | 10.3.205.79 |
| 171 | 10.3.205.80/29 | 10.3.205.81 – 10.3.205.86 | 10.3.205.87 |
| 172 | 10.3.205.88/29 | 10.3.205.89 – 10.3.205.94 | 10.3.205.95 |
| 173 | 10.3.205.96/29 | 10.3.205.97 – 10.3.205.102 | 10.3.205.103 |
| 174 | 10.3.205.104/29 | 10.3.205.105 – 10.3.205.110 | 10.3.205.111 |
| 175 | 10.3.205.112/29 | 10.3.205.113 – 10.3.205.118 | 10.3.205.119 |
| 176 | 10.3.205.120/29 | 10.3.205.121 – 10.3.205.126 | 10.3.205.127 |
| 177 | 10.3.205.128/29 | 10.3.205.129 – 10.3.205.134 | 10.3.205.135 |
| 178 | 10.3.205.136/29 | 10.3.205.137 – 10.3.205.142 | 10.3.205.143 |
| 179 | 10.3.205.144/29 | 10.3.205.145 – 10.3.205.150 | 10.3.205.151 |
| 180 | 10.3.205.152/29 | 10.3.205.153 – 10.3.205.158 | 10.3.205.159 |
| 181 | 10.3.205.160/29 | 10.3.205.161 – 10.3.205.166 | 10.3.205.167 |
| 182 | 10.3.205.168/29 | 10.3.205.169 – 10.3.205.174 | 10.3.205.175 |
| 183 | 10.3.205.176/29 | 10.3.205.177 – 10.3.205.182 | 10.3.205.183 |
| 184 | 10.3.205.184/29 | 10.3.205.185 – 10.3.205.190 | 10.3.205.191 |
| 185 | 10.3.205.192/29 | 10.3.205.193 – 10.3.205.198 | 10.3.205.199 |
| 186 | 10.3.205.200/29 | 10.3.205.201 – 10.3.205.206 | 10.3.205.207 |
| 187 | 10.3.205.208/29 | 10.3.205.209 – 10.3.205.214 | 10.3.205.215 |
| 188 | 10.3.205.216/29 | 10.3.205.217 – 10.3.205.222 | 10.3.205.223 |
| 189 | 10.3.205.224/29 | 10.3.205.225 – 10.3.205.230 | 10.3.205.231 |
| 190 | 10.3.205.232/29 | 10.3.205.233 – 10.3.205.238 | 10.3.205.239 |
| 191 | 10.3.205.240/29 | 10.3.205.241 – 10.3.205.246 | 10.3.205.247 |
| 192 | 10.3.205.248/29 | 10.3.205.249 – 10.3.205.254 | 10.3.205.255 |
| 193 | 10.3.206.0/29 | 10.3.206.1 – 10.3.206.6 | 10.3.206.7 |
| 194 | 10.3.206.8/29 | 10.3.206.9 – 10.3.206.14 | 10.3.206.15 |
| 195 | 10.3.206.16/29 | 10.3.206.17 – 10.3.206.22 | 10.3.206.23 |
| 196 | 10.3.206.24/29 | 10.3.206.25 – 10.3.206.30 | 10.3.206.31 |
| 197 | 10.3.206.32/29 | 10.3.206.33 – 10.3.206.38 | 10.3.206.39 |
| 198 | 10.3.206.40/29 | 10.3.206.41 – 10.3.206.46 | 10.3.206.47 |
| 199 | 10.3.206.48/29 | 10.3.206.49 – 10.3.206.54 | 10.3.206.55 |
| 200 | 10.3.206.56/29 | 10.3.206.57 – 10.3.206.62 | 10.3.206.63 |
| 201 | 10.3.206.64/29 | 10.3.206.65 – 10.3.206.70 | 10.3.206.71 |
| 202 | 10.3.206.72/29 | 10.3.206.73 – 10.3.206.78 | 10.3.206.79 |
| 203 | 10.3.206.80/29 | 10.3.206.81 – 10.3.206.86 | 10.3.206.87 |
| 204 | 10.3.206.88/29 | 10.3.206.89 – 10.3.206.94 | 10.3.206.95 |
| 205 | 10.3.206.96/29 | 10.3.206.97 – 10.3.206.102 | 10.3.206.103 |
| 206 | 10.3.206.104/29 | 10.3.206.105 – 10.3.206.110 | 10.3.206.111 |
| 207 | 10.3.206.112/29 | 10.3.206.113 – 10.3.206.118 | 10.3.206.119 |
| 208 | 10.3.206.120/29 | 10.3.206.121 – 10.3.206.126 | 10.3.206.127 |
| 209 | 10.3.206.128/29 | 10.3.206.129 – 10.3.206.134 | 10.3.206.135 |
| 210 | 10.3.206.136/29 | 10.3.206.137 – 10.3.206.142 | 10.3.206.143 |
| 211 | 10.3.206.144/29 | 10.3.206.145 – 10.3.206.150 | 10.3.206.151 |
| 212 | 10.3.206.152/29 | 10.3.206.153 – 10.3.206.158 | 10.3.206.159 |
| 213 | 10.3.206.160/29 | 10.3.206.161 – 10.3.206.166 | 10.3.206.167 |
| 214 | 10.3.206.168/29 | 10.3.206.169 – 10.3.206.174 | 10.3.206.175 |
| 215 | 10.3.206.176/29 | 10.3.206.177 – 10.3.206.182 | 10.3.206.183 |
| 216 | 10.3.206.184/29 | 10.3.206.185 – 10.3.206.190 | 10.3.206.191 |
| 217 | 10.3.206.192/29 | 10.3.206.193 – 10.3.206.198 | 10.3.206.199 |
| 218 | 10.3.206.200/29 | 10.3.206.201 – 10.3.206.206 | 10.3.206.207 |
| 219 | 10.3.206.208/29 | 10.3.206.209 – 10.3.206.214 | 10.3.206.215 |
| 220 | 10.3.206.216/29 | 10.3.206.217 – 10.3.206.222 | 10.3.206.223 |
| 221 | 10.3.206.224/29 | 10.3.206.225 – 10.3.206.230 | 10.3.206.231 |
| 222 | 10.3.206.232/29 | 10.3.206.233 – 10.3.206.238 | 10.3.206.239 |
| 223 | 10.3.206.240/29 | 10.3.206.241 – 10.3.206.246 | 10.3.206.247 |
| 224 | 10.3.206.248/29 | 10.3.206.249 – 10.3.206.254 | 10.3.206.255 |
| 225 | 10.3.207.0/29 | 10.3.207.1 – 10.3.207.6 | 10.3.207.7 |
| 226 | 10.3.207.8/29 | 10.3.207.9 – 10.3.207.14 | 10.3.207.15 |
| 227 | 10.3.207.16/29 | 10.3.207.17 – 10.3.207.22 | 10.3.207.23 |
| 228 | 10.3.207.24/29 | 10.3.207.25 – 10.3.207.30 | 10.3.207.31 |
| 229 | 10.3.207.32/29 | 10.3.207.33 – 10.3.207.38 | 10.3.207.39 |
| 230 | 10.3.207.40/29 | 10.3.207.41 – 10.3.207.46 | 10.3.207.47 |
| 231 | 10.3.207.48/29 | 10.3.207.49 – 10.3.207.54 | 10.3.207.55 |
| 232 | 10.3.207.56/29 | 10.3.207.57 – 10.3.207.62 | 10.3.207.63 |
| 233 | 10.3.207.64/29 | 10.3.207.65 – 10.3.207.70 | 10.3.207.71 |
| 234 | 10.3.207.72/29 | 10.3.207.73 – 10.3.207.78 | 10.3.207.79 |
| 235 | 10.3.207.80/29 | 10.3.207.81 – 10.3.207.86 | 10.3.207.87 |
| 236 | 10.3.207.88/29 | 10.3.207.89 – 10.3.207.94 | 10.3.207.95 |
| 237 | 10.3.207.96/29 | 10.3.207.97 – 10.3.207.102 | 10.3.207.103 |
| 238 | 10.3.207.104/29 | 10.3.207.105 – 10.3.207.110 | 10.3.207.111 |
| 239 | 10.3.207.112/29 | 10.3.207.113 – 10.3.207.118 | 10.3.207.119 |
| 240 | 10.3.207.120/29 | 10.3.207.121 – 10.3.207.126 | 10.3.207.127 |
| 241 | 10.3.207.128/29 | 10.3.207.129 – 10.3.207.134 | 10.3.207.135 |
| 242 | 10.3.207.136/29 | 10.3.207.137 – 10.3.207.142 | 10.3.207.143 |
| 243 | 10.3.207.144/29 | 10.3.207.145 – 10.3.207.150 | 10.3.207.151 |
| 244 | 10.3.207.152/29 | 10.3.207.153 – 10.3.207.158 | 10.3.207.159 |
| 245 | 10.3.207.160/29 | 10.3.207.161 – 10.3.207.166 | 10.3.207.167 |
| 246 | 10.3.207.168/29 | 10.3.207.169 – 10.3.207.174 | 10.3.207.175 |
| 247 | 10.3.207.176/29 | 10.3.207.177 – 10.3.207.182 | 10.3.207.183 |
| 248 | 10.3.207.184/29 | 10.3.207.185 – 10.3.207.190 | 10.3.207.191 |
| 249 | 10.3.207.192/29 | 10.3.207.193 – 10.3.207.198 | 10.3.207.199 |
| 250 | 10.3.207.200/29 | 10.3.207.201 – 10.3.207.206 | 10.3.207.207 |
| 251 | 10.3.207.208/29 | 10.3.207.209 – 10.3.207.214 | 10.3.207.215 |
| 252 | 10.3.207.216/29 | 10.3.207.217 – 10.3.207.222 | 10.3.207.223 |
| 253 | 10.3.207.224/29 | 10.3.207.225 – 10.3.207.230 | 10.3.207.231 |
| 254 | 10.3.207.232/29 | 10.3.207.233 – 10.3.207.238 | 10.3.207.239 |
| 255 | 10.3.207.240/29 | 10.3.207.241 – 10.3.207.246 | 10.3.207.247 |
| 256 | 10.3.207.248/29 | 10.3.207.249 – 10.3.207.254 | 10.3.207.255 |
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 /21 |
|---|---|---|---|---|
| /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 | - |
| /17 | 255.255.128.0 | 32,768 | 32,766 | - |
| /18 | 255.255.192.0 | 16,384 | 16,382 | - |
| /19 | 255.255.224.0 | 8,192 | 8,190 | - |
| /20 | 255.255.240.0 | 4,096 | 4,094 | - |
| /21 | 255.255.248.0 | 2,048 | 2,046 | 1 |
| /22 | 255.255.252.0 | 1,024 | 1,022 | 2 split → |
| /23 | 255.255.254.0 | 512 | 510 | 4 split → |
| /24 | 255.255.255.0 | 256 | 254 | 8 split → |
| /25 | 255.255.255.128 | 128 | 126 | 16 split → |
| /26 | 255.255.255.192 | 64 | 62 | 32 split → |
| /27 | 255.255.255.224 | 32 | 30 | 64 split → |
| /28 | 255.255.255.240 | 16 | 14 | 128 split → |
| /29 | 255.255.255.248 | 8 | 6 | 256 split → |
| /30 | 255.255.255.252 | 4 | 2 | 512 split → |
| /31 | 255.255.255.254 | 2 | 2 | 1,024 split → |
| /32 | 255.255.255.255 | 1 | 1 | 2,048 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.