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)10.6.248.0/21
network10.6.248.0/21
broadcast10.6.255.255
first host10.6.248.1
last host10.6.255.254
subnet mask255.255.248.0
wildcard0.0.7.255
addresses2,048
usable hosts2,046
classA
ipcalc 10.6.248.0/21
address00001010.00000110.11111000.00000000
subnet mask11111111.11111111.11111000.00000000
network00001010.00000110.11111000.00000000
broadcast00001010.00000110.11111111.11111111
green = network part, grey = host part
hex0x0a06f800
decimal168228864
reverse dns0.248.6.10.in-addr.arpa
ipv4-mapped::ffff:a06:f800
/21 split into /29 · 256 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.6.248.0/29 | 10.6.248.1 – 10.6.248.6 | 10.6.248.7 |
| 2 | 10.6.248.8/29 | 10.6.248.9 – 10.6.248.14 | 10.6.248.15 |
| 3 | 10.6.248.16/29 | 10.6.248.17 – 10.6.248.22 | 10.6.248.23 |
| 4 | 10.6.248.24/29 | 10.6.248.25 – 10.6.248.30 | 10.6.248.31 |
| 5 | 10.6.248.32/29 | 10.6.248.33 – 10.6.248.38 | 10.6.248.39 |
| 6 | 10.6.248.40/29 | 10.6.248.41 – 10.6.248.46 | 10.6.248.47 |
| 7 | 10.6.248.48/29 | 10.6.248.49 – 10.6.248.54 | 10.6.248.55 |
| 8 | 10.6.248.56/29 | 10.6.248.57 – 10.6.248.62 | 10.6.248.63 |
| 9 | 10.6.248.64/29 | 10.6.248.65 – 10.6.248.70 | 10.6.248.71 |
| 10 | 10.6.248.72/29 | 10.6.248.73 – 10.6.248.78 | 10.6.248.79 |
| 11 | 10.6.248.80/29 | 10.6.248.81 – 10.6.248.86 | 10.6.248.87 |
| 12 | 10.6.248.88/29 | 10.6.248.89 – 10.6.248.94 | 10.6.248.95 |
| 13 | 10.6.248.96/29 | 10.6.248.97 – 10.6.248.102 | 10.6.248.103 |
| 14 | 10.6.248.104/29 | 10.6.248.105 – 10.6.248.110 | 10.6.248.111 |
| 15 | 10.6.248.112/29 | 10.6.248.113 – 10.6.248.118 | 10.6.248.119 |
| 16 | 10.6.248.120/29 | 10.6.248.121 – 10.6.248.126 | 10.6.248.127 |
| 17 | 10.6.248.128/29 | 10.6.248.129 – 10.6.248.134 | 10.6.248.135 |
| 18 | 10.6.248.136/29 | 10.6.248.137 – 10.6.248.142 | 10.6.248.143 |
| 19 | 10.6.248.144/29 | 10.6.248.145 – 10.6.248.150 | 10.6.248.151 |
| 20 | 10.6.248.152/29 | 10.6.248.153 – 10.6.248.158 | 10.6.248.159 |
| 21 | 10.6.248.160/29 | 10.6.248.161 – 10.6.248.166 | 10.6.248.167 |
| 22 | 10.6.248.168/29 | 10.6.248.169 – 10.6.248.174 | 10.6.248.175 |
| 23 | 10.6.248.176/29 | 10.6.248.177 – 10.6.248.182 | 10.6.248.183 |
| 24 | 10.6.248.184/29 | 10.6.248.185 – 10.6.248.190 | 10.6.248.191 |
| 25 | 10.6.248.192/29 | 10.6.248.193 – 10.6.248.198 | 10.6.248.199 |
| 26 | 10.6.248.200/29 | 10.6.248.201 – 10.6.248.206 | 10.6.248.207 |
| 27 | 10.6.248.208/29 | 10.6.248.209 – 10.6.248.214 | 10.6.248.215 |
| 28 | 10.6.248.216/29 | 10.6.248.217 – 10.6.248.222 | 10.6.248.223 |
| 29 | 10.6.248.224/29 | 10.6.248.225 – 10.6.248.230 | 10.6.248.231 |
| 30 | 10.6.248.232/29 | 10.6.248.233 – 10.6.248.238 | 10.6.248.239 |
| 31 | 10.6.248.240/29 | 10.6.248.241 – 10.6.248.246 | 10.6.248.247 |
| 32 | 10.6.248.248/29 | 10.6.248.249 – 10.6.248.254 | 10.6.248.255 |
| 33 | 10.6.249.0/29 | 10.6.249.1 – 10.6.249.6 | 10.6.249.7 |
| 34 | 10.6.249.8/29 | 10.6.249.9 – 10.6.249.14 | 10.6.249.15 |
| 35 | 10.6.249.16/29 | 10.6.249.17 – 10.6.249.22 | 10.6.249.23 |
| 36 | 10.6.249.24/29 | 10.6.249.25 – 10.6.249.30 | 10.6.249.31 |
| 37 | 10.6.249.32/29 | 10.6.249.33 – 10.6.249.38 | 10.6.249.39 |
| 38 | 10.6.249.40/29 | 10.6.249.41 – 10.6.249.46 | 10.6.249.47 |
| 39 | 10.6.249.48/29 | 10.6.249.49 – 10.6.249.54 | 10.6.249.55 |
| 40 | 10.6.249.56/29 | 10.6.249.57 – 10.6.249.62 | 10.6.249.63 |
| 41 | 10.6.249.64/29 | 10.6.249.65 – 10.6.249.70 | 10.6.249.71 |
| 42 | 10.6.249.72/29 | 10.6.249.73 – 10.6.249.78 | 10.6.249.79 |
| 43 | 10.6.249.80/29 | 10.6.249.81 – 10.6.249.86 | 10.6.249.87 |
| 44 | 10.6.249.88/29 | 10.6.249.89 – 10.6.249.94 | 10.6.249.95 |
| 45 | 10.6.249.96/29 | 10.6.249.97 – 10.6.249.102 | 10.6.249.103 |
| 46 | 10.6.249.104/29 | 10.6.249.105 – 10.6.249.110 | 10.6.249.111 |
| 47 | 10.6.249.112/29 | 10.6.249.113 – 10.6.249.118 | 10.6.249.119 |
| 48 | 10.6.249.120/29 | 10.6.249.121 – 10.6.249.126 | 10.6.249.127 |
| 49 | 10.6.249.128/29 | 10.6.249.129 – 10.6.249.134 | 10.6.249.135 |
| 50 | 10.6.249.136/29 | 10.6.249.137 – 10.6.249.142 | 10.6.249.143 |
| 51 | 10.6.249.144/29 | 10.6.249.145 – 10.6.249.150 | 10.6.249.151 |
| 52 | 10.6.249.152/29 | 10.6.249.153 – 10.6.249.158 | 10.6.249.159 |
| 53 | 10.6.249.160/29 | 10.6.249.161 – 10.6.249.166 | 10.6.249.167 |
| 54 | 10.6.249.168/29 | 10.6.249.169 – 10.6.249.174 | 10.6.249.175 |
| 55 | 10.6.249.176/29 | 10.6.249.177 – 10.6.249.182 | 10.6.249.183 |
| 56 | 10.6.249.184/29 | 10.6.249.185 – 10.6.249.190 | 10.6.249.191 |
| 57 | 10.6.249.192/29 | 10.6.249.193 – 10.6.249.198 | 10.6.249.199 |
| 58 | 10.6.249.200/29 | 10.6.249.201 – 10.6.249.206 | 10.6.249.207 |
| 59 | 10.6.249.208/29 | 10.6.249.209 – 10.6.249.214 | 10.6.249.215 |
| 60 | 10.6.249.216/29 | 10.6.249.217 – 10.6.249.222 | 10.6.249.223 |
| 61 | 10.6.249.224/29 | 10.6.249.225 – 10.6.249.230 | 10.6.249.231 |
| 62 | 10.6.249.232/29 | 10.6.249.233 – 10.6.249.238 | 10.6.249.239 |
| 63 | 10.6.249.240/29 | 10.6.249.241 – 10.6.249.246 | 10.6.249.247 |
| 64 | 10.6.249.248/29 | 10.6.249.249 – 10.6.249.254 | 10.6.249.255 |
| 65 | 10.6.250.0/29 | 10.6.250.1 – 10.6.250.6 | 10.6.250.7 |
| 66 | 10.6.250.8/29 | 10.6.250.9 – 10.6.250.14 | 10.6.250.15 |
| 67 | 10.6.250.16/29 | 10.6.250.17 – 10.6.250.22 | 10.6.250.23 |
| 68 | 10.6.250.24/29 | 10.6.250.25 – 10.6.250.30 | 10.6.250.31 |
| 69 | 10.6.250.32/29 | 10.6.250.33 – 10.6.250.38 | 10.6.250.39 |
| 70 | 10.6.250.40/29 | 10.6.250.41 – 10.6.250.46 | 10.6.250.47 |
| 71 | 10.6.250.48/29 | 10.6.250.49 – 10.6.250.54 | 10.6.250.55 |
| 72 | 10.6.250.56/29 | 10.6.250.57 – 10.6.250.62 | 10.6.250.63 |
| 73 | 10.6.250.64/29 | 10.6.250.65 – 10.6.250.70 | 10.6.250.71 |
| 74 | 10.6.250.72/29 | 10.6.250.73 – 10.6.250.78 | 10.6.250.79 |
| 75 | 10.6.250.80/29 | 10.6.250.81 – 10.6.250.86 | 10.6.250.87 |
| 76 | 10.6.250.88/29 | 10.6.250.89 – 10.6.250.94 | 10.6.250.95 |
| 77 | 10.6.250.96/29 | 10.6.250.97 – 10.6.250.102 | 10.6.250.103 |
| 78 | 10.6.250.104/29 | 10.6.250.105 – 10.6.250.110 | 10.6.250.111 |
| 79 | 10.6.250.112/29 | 10.6.250.113 – 10.6.250.118 | 10.6.250.119 |
| 80 | 10.6.250.120/29 | 10.6.250.121 – 10.6.250.126 | 10.6.250.127 |
| 81 | 10.6.250.128/29 | 10.6.250.129 – 10.6.250.134 | 10.6.250.135 |
| 82 | 10.6.250.136/29 | 10.6.250.137 – 10.6.250.142 | 10.6.250.143 |
| 83 | 10.6.250.144/29 | 10.6.250.145 – 10.6.250.150 | 10.6.250.151 |
| 84 | 10.6.250.152/29 | 10.6.250.153 – 10.6.250.158 | 10.6.250.159 |
| 85 | 10.6.250.160/29 | 10.6.250.161 – 10.6.250.166 | 10.6.250.167 |
| 86 | 10.6.250.168/29 | 10.6.250.169 – 10.6.250.174 | 10.6.250.175 |
| 87 | 10.6.250.176/29 | 10.6.250.177 – 10.6.250.182 | 10.6.250.183 |
| 88 | 10.6.250.184/29 | 10.6.250.185 – 10.6.250.190 | 10.6.250.191 |
| 89 | 10.6.250.192/29 | 10.6.250.193 – 10.6.250.198 | 10.6.250.199 |
| 90 | 10.6.250.200/29 | 10.6.250.201 – 10.6.250.206 | 10.6.250.207 |
| 91 | 10.6.250.208/29 | 10.6.250.209 – 10.6.250.214 | 10.6.250.215 |
| 92 | 10.6.250.216/29 | 10.6.250.217 – 10.6.250.222 | 10.6.250.223 |
| 93 | 10.6.250.224/29 | 10.6.250.225 – 10.6.250.230 | 10.6.250.231 |
| 94 | 10.6.250.232/29 | 10.6.250.233 – 10.6.250.238 | 10.6.250.239 |
| 95 | 10.6.250.240/29 | 10.6.250.241 – 10.6.250.246 | 10.6.250.247 |
| 96 | 10.6.250.248/29 | 10.6.250.249 – 10.6.250.254 | 10.6.250.255 |
| 97 | 10.6.251.0/29 | 10.6.251.1 – 10.6.251.6 | 10.6.251.7 |
| 98 | 10.6.251.8/29 | 10.6.251.9 – 10.6.251.14 | 10.6.251.15 |
| 99 | 10.6.251.16/29 | 10.6.251.17 – 10.6.251.22 | 10.6.251.23 |
| 100 | 10.6.251.24/29 | 10.6.251.25 – 10.6.251.30 | 10.6.251.31 |
| 101 | 10.6.251.32/29 | 10.6.251.33 – 10.6.251.38 | 10.6.251.39 |
| 102 | 10.6.251.40/29 | 10.6.251.41 – 10.6.251.46 | 10.6.251.47 |
| 103 | 10.6.251.48/29 | 10.6.251.49 – 10.6.251.54 | 10.6.251.55 |
| 104 | 10.6.251.56/29 | 10.6.251.57 – 10.6.251.62 | 10.6.251.63 |
| 105 | 10.6.251.64/29 | 10.6.251.65 – 10.6.251.70 | 10.6.251.71 |
| 106 | 10.6.251.72/29 | 10.6.251.73 – 10.6.251.78 | 10.6.251.79 |
| 107 | 10.6.251.80/29 | 10.6.251.81 – 10.6.251.86 | 10.6.251.87 |
| 108 | 10.6.251.88/29 | 10.6.251.89 – 10.6.251.94 | 10.6.251.95 |
| 109 | 10.6.251.96/29 | 10.6.251.97 – 10.6.251.102 | 10.6.251.103 |
| 110 | 10.6.251.104/29 | 10.6.251.105 – 10.6.251.110 | 10.6.251.111 |
| 111 | 10.6.251.112/29 | 10.6.251.113 – 10.6.251.118 | 10.6.251.119 |
| 112 | 10.6.251.120/29 | 10.6.251.121 – 10.6.251.126 | 10.6.251.127 |
| 113 | 10.6.251.128/29 | 10.6.251.129 – 10.6.251.134 | 10.6.251.135 |
| 114 | 10.6.251.136/29 | 10.6.251.137 – 10.6.251.142 | 10.6.251.143 |
| 115 | 10.6.251.144/29 | 10.6.251.145 – 10.6.251.150 | 10.6.251.151 |
| 116 | 10.6.251.152/29 | 10.6.251.153 – 10.6.251.158 | 10.6.251.159 |
| 117 | 10.6.251.160/29 | 10.6.251.161 – 10.6.251.166 | 10.6.251.167 |
| 118 | 10.6.251.168/29 | 10.6.251.169 – 10.6.251.174 | 10.6.251.175 |
| 119 | 10.6.251.176/29 | 10.6.251.177 – 10.6.251.182 | 10.6.251.183 |
| 120 | 10.6.251.184/29 | 10.6.251.185 – 10.6.251.190 | 10.6.251.191 |
| 121 | 10.6.251.192/29 | 10.6.251.193 – 10.6.251.198 | 10.6.251.199 |
| 122 | 10.6.251.200/29 | 10.6.251.201 – 10.6.251.206 | 10.6.251.207 |
| 123 | 10.6.251.208/29 | 10.6.251.209 – 10.6.251.214 | 10.6.251.215 |
| 124 | 10.6.251.216/29 | 10.6.251.217 – 10.6.251.222 | 10.6.251.223 |
| 125 | 10.6.251.224/29 | 10.6.251.225 – 10.6.251.230 | 10.6.251.231 |
| 126 | 10.6.251.232/29 | 10.6.251.233 – 10.6.251.238 | 10.6.251.239 |
| 127 | 10.6.251.240/29 | 10.6.251.241 – 10.6.251.246 | 10.6.251.247 |
| 128 | 10.6.251.248/29 | 10.6.251.249 – 10.6.251.254 | 10.6.251.255 |
| 129 | 10.6.252.0/29 | 10.6.252.1 – 10.6.252.6 | 10.6.252.7 |
| 130 | 10.6.252.8/29 | 10.6.252.9 – 10.6.252.14 | 10.6.252.15 |
| 131 | 10.6.252.16/29 | 10.6.252.17 – 10.6.252.22 | 10.6.252.23 |
| 132 | 10.6.252.24/29 | 10.6.252.25 – 10.6.252.30 | 10.6.252.31 |
| 133 | 10.6.252.32/29 | 10.6.252.33 – 10.6.252.38 | 10.6.252.39 |
| 134 | 10.6.252.40/29 | 10.6.252.41 – 10.6.252.46 | 10.6.252.47 |
| 135 | 10.6.252.48/29 | 10.6.252.49 – 10.6.252.54 | 10.6.252.55 |
| 136 | 10.6.252.56/29 | 10.6.252.57 – 10.6.252.62 | 10.6.252.63 |
| 137 | 10.6.252.64/29 | 10.6.252.65 – 10.6.252.70 | 10.6.252.71 |
| 138 | 10.6.252.72/29 | 10.6.252.73 – 10.6.252.78 | 10.6.252.79 |
| 139 | 10.6.252.80/29 | 10.6.252.81 – 10.6.252.86 | 10.6.252.87 |
| 140 | 10.6.252.88/29 | 10.6.252.89 – 10.6.252.94 | 10.6.252.95 |
| 141 | 10.6.252.96/29 | 10.6.252.97 – 10.6.252.102 | 10.6.252.103 |
| 142 | 10.6.252.104/29 | 10.6.252.105 – 10.6.252.110 | 10.6.252.111 |
| 143 | 10.6.252.112/29 | 10.6.252.113 – 10.6.252.118 | 10.6.252.119 |
| 144 | 10.6.252.120/29 | 10.6.252.121 – 10.6.252.126 | 10.6.252.127 |
| 145 | 10.6.252.128/29 | 10.6.252.129 – 10.6.252.134 | 10.6.252.135 |
| 146 | 10.6.252.136/29 | 10.6.252.137 – 10.6.252.142 | 10.6.252.143 |
| 147 | 10.6.252.144/29 | 10.6.252.145 – 10.6.252.150 | 10.6.252.151 |
| 148 | 10.6.252.152/29 | 10.6.252.153 – 10.6.252.158 | 10.6.252.159 |
| 149 | 10.6.252.160/29 | 10.6.252.161 – 10.6.252.166 | 10.6.252.167 |
| 150 | 10.6.252.168/29 | 10.6.252.169 – 10.6.252.174 | 10.6.252.175 |
| 151 | 10.6.252.176/29 | 10.6.252.177 – 10.6.252.182 | 10.6.252.183 |
| 152 | 10.6.252.184/29 | 10.6.252.185 – 10.6.252.190 | 10.6.252.191 |
| 153 | 10.6.252.192/29 | 10.6.252.193 – 10.6.252.198 | 10.6.252.199 |
| 154 | 10.6.252.200/29 | 10.6.252.201 – 10.6.252.206 | 10.6.252.207 |
| 155 | 10.6.252.208/29 | 10.6.252.209 – 10.6.252.214 | 10.6.252.215 |
| 156 | 10.6.252.216/29 | 10.6.252.217 – 10.6.252.222 | 10.6.252.223 |
| 157 | 10.6.252.224/29 | 10.6.252.225 – 10.6.252.230 | 10.6.252.231 |
| 158 | 10.6.252.232/29 | 10.6.252.233 – 10.6.252.238 | 10.6.252.239 |
| 159 | 10.6.252.240/29 | 10.6.252.241 – 10.6.252.246 | 10.6.252.247 |
| 160 | 10.6.252.248/29 | 10.6.252.249 – 10.6.252.254 | 10.6.252.255 |
| 161 | 10.6.253.0/29 | 10.6.253.1 – 10.6.253.6 | 10.6.253.7 |
| 162 | 10.6.253.8/29 | 10.6.253.9 – 10.6.253.14 | 10.6.253.15 |
| 163 | 10.6.253.16/29 | 10.6.253.17 – 10.6.253.22 | 10.6.253.23 |
| 164 | 10.6.253.24/29 | 10.6.253.25 – 10.6.253.30 | 10.6.253.31 |
| 165 | 10.6.253.32/29 | 10.6.253.33 – 10.6.253.38 | 10.6.253.39 |
| 166 | 10.6.253.40/29 | 10.6.253.41 – 10.6.253.46 | 10.6.253.47 |
| 167 | 10.6.253.48/29 | 10.6.253.49 – 10.6.253.54 | 10.6.253.55 |
| 168 | 10.6.253.56/29 | 10.6.253.57 – 10.6.253.62 | 10.6.253.63 |
| 169 | 10.6.253.64/29 | 10.6.253.65 – 10.6.253.70 | 10.6.253.71 |
| 170 | 10.6.253.72/29 | 10.6.253.73 – 10.6.253.78 | 10.6.253.79 |
| 171 | 10.6.253.80/29 | 10.6.253.81 – 10.6.253.86 | 10.6.253.87 |
| 172 | 10.6.253.88/29 | 10.6.253.89 – 10.6.253.94 | 10.6.253.95 |
| 173 | 10.6.253.96/29 | 10.6.253.97 – 10.6.253.102 | 10.6.253.103 |
| 174 | 10.6.253.104/29 | 10.6.253.105 – 10.6.253.110 | 10.6.253.111 |
| 175 | 10.6.253.112/29 | 10.6.253.113 – 10.6.253.118 | 10.6.253.119 |
| 176 | 10.6.253.120/29 | 10.6.253.121 – 10.6.253.126 | 10.6.253.127 |
| 177 | 10.6.253.128/29 | 10.6.253.129 – 10.6.253.134 | 10.6.253.135 |
| 178 | 10.6.253.136/29 | 10.6.253.137 – 10.6.253.142 | 10.6.253.143 |
| 179 | 10.6.253.144/29 | 10.6.253.145 – 10.6.253.150 | 10.6.253.151 |
| 180 | 10.6.253.152/29 | 10.6.253.153 – 10.6.253.158 | 10.6.253.159 |
| 181 | 10.6.253.160/29 | 10.6.253.161 – 10.6.253.166 | 10.6.253.167 |
| 182 | 10.6.253.168/29 | 10.6.253.169 – 10.6.253.174 | 10.6.253.175 |
| 183 | 10.6.253.176/29 | 10.6.253.177 – 10.6.253.182 | 10.6.253.183 |
| 184 | 10.6.253.184/29 | 10.6.253.185 – 10.6.253.190 | 10.6.253.191 |
| 185 | 10.6.253.192/29 | 10.6.253.193 – 10.6.253.198 | 10.6.253.199 |
| 186 | 10.6.253.200/29 | 10.6.253.201 – 10.6.253.206 | 10.6.253.207 |
| 187 | 10.6.253.208/29 | 10.6.253.209 – 10.6.253.214 | 10.6.253.215 |
| 188 | 10.6.253.216/29 | 10.6.253.217 – 10.6.253.222 | 10.6.253.223 |
| 189 | 10.6.253.224/29 | 10.6.253.225 – 10.6.253.230 | 10.6.253.231 |
| 190 | 10.6.253.232/29 | 10.6.253.233 – 10.6.253.238 | 10.6.253.239 |
| 191 | 10.6.253.240/29 | 10.6.253.241 – 10.6.253.246 | 10.6.253.247 |
| 192 | 10.6.253.248/29 | 10.6.253.249 – 10.6.253.254 | 10.6.253.255 |
| 193 | 10.6.254.0/29 | 10.6.254.1 – 10.6.254.6 | 10.6.254.7 |
| 194 | 10.6.254.8/29 | 10.6.254.9 – 10.6.254.14 | 10.6.254.15 |
| 195 | 10.6.254.16/29 | 10.6.254.17 – 10.6.254.22 | 10.6.254.23 |
| 196 | 10.6.254.24/29 | 10.6.254.25 – 10.6.254.30 | 10.6.254.31 |
| 197 | 10.6.254.32/29 | 10.6.254.33 – 10.6.254.38 | 10.6.254.39 |
| 198 | 10.6.254.40/29 | 10.6.254.41 – 10.6.254.46 | 10.6.254.47 |
| 199 | 10.6.254.48/29 | 10.6.254.49 – 10.6.254.54 | 10.6.254.55 |
| 200 | 10.6.254.56/29 | 10.6.254.57 – 10.6.254.62 | 10.6.254.63 |
| 201 | 10.6.254.64/29 | 10.6.254.65 – 10.6.254.70 | 10.6.254.71 |
| 202 | 10.6.254.72/29 | 10.6.254.73 – 10.6.254.78 | 10.6.254.79 |
| 203 | 10.6.254.80/29 | 10.6.254.81 – 10.6.254.86 | 10.6.254.87 |
| 204 | 10.6.254.88/29 | 10.6.254.89 – 10.6.254.94 | 10.6.254.95 |
| 205 | 10.6.254.96/29 | 10.6.254.97 – 10.6.254.102 | 10.6.254.103 |
| 206 | 10.6.254.104/29 | 10.6.254.105 – 10.6.254.110 | 10.6.254.111 |
| 207 | 10.6.254.112/29 | 10.6.254.113 – 10.6.254.118 | 10.6.254.119 |
| 208 | 10.6.254.120/29 | 10.6.254.121 – 10.6.254.126 | 10.6.254.127 |
| 209 | 10.6.254.128/29 | 10.6.254.129 – 10.6.254.134 | 10.6.254.135 |
| 210 | 10.6.254.136/29 | 10.6.254.137 – 10.6.254.142 | 10.6.254.143 |
| 211 | 10.6.254.144/29 | 10.6.254.145 – 10.6.254.150 | 10.6.254.151 |
| 212 | 10.6.254.152/29 | 10.6.254.153 – 10.6.254.158 | 10.6.254.159 |
| 213 | 10.6.254.160/29 | 10.6.254.161 – 10.6.254.166 | 10.6.254.167 |
| 214 | 10.6.254.168/29 | 10.6.254.169 – 10.6.254.174 | 10.6.254.175 |
| 215 | 10.6.254.176/29 | 10.6.254.177 – 10.6.254.182 | 10.6.254.183 |
| 216 | 10.6.254.184/29 | 10.6.254.185 – 10.6.254.190 | 10.6.254.191 |
| 217 | 10.6.254.192/29 | 10.6.254.193 – 10.6.254.198 | 10.6.254.199 |
| 218 | 10.6.254.200/29 | 10.6.254.201 – 10.6.254.206 | 10.6.254.207 |
| 219 | 10.6.254.208/29 | 10.6.254.209 – 10.6.254.214 | 10.6.254.215 |
| 220 | 10.6.254.216/29 | 10.6.254.217 – 10.6.254.222 | 10.6.254.223 |
| 221 | 10.6.254.224/29 | 10.6.254.225 – 10.6.254.230 | 10.6.254.231 |
| 222 | 10.6.254.232/29 | 10.6.254.233 – 10.6.254.238 | 10.6.254.239 |
| 223 | 10.6.254.240/29 | 10.6.254.241 – 10.6.254.246 | 10.6.254.247 |
| 224 | 10.6.254.248/29 | 10.6.254.249 – 10.6.254.254 | 10.6.254.255 |
| 225 | 10.6.255.0/29 | 10.6.255.1 – 10.6.255.6 | 10.6.255.7 |
| 226 | 10.6.255.8/29 | 10.6.255.9 – 10.6.255.14 | 10.6.255.15 |
| 227 | 10.6.255.16/29 | 10.6.255.17 – 10.6.255.22 | 10.6.255.23 |
| 228 | 10.6.255.24/29 | 10.6.255.25 – 10.6.255.30 | 10.6.255.31 |
| 229 | 10.6.255.32/29 | 10.6.255.33 – 10.6.255.38 | 10.6.255.39 |
| 230 | 10.6.255.40/29 | 10.6.255.41 – 10.6.255.46 | 10.6.255.47 |
| 231 | 10.6.255.48/29 | 10.6.255.49 – 10.6.255.54 | 10.6.255.55 |
| 232 | 10.6.255.56/29 | 10.6.255.57 – 10.6.255.62 | 10.6.255.63 |
| 233 | 10.6.255.64/29 | 10.6.255.65 – 10.6.255.70 | 10.6.255.71 |
| 234 | 10.6.255.72/29 | 10.6.255.73 – 10.6.255.78 | 10.6.255.79 |
| 235 | 10.6.255.80/29 | 10.6.255.81 – 10.6.255.86 | 10.6.255.87 |
| 236 | 10.6.255.88/29 | 10.6.255.89 – 10.6.255.94 | 10.6.255.95 |
| 237 | 10.6.255.96/29 | 10.6.255.97 – 10.6.255.102 | 10.6.255.103 |
| 238 | 10.6.255.104/29 | 10.6.255.105 – 10.6.255.110 | 10.6.255.111 |
| 239 | 10.6.255.112/29 | 10.6.255.113 – 10.6.255.118 | 10.6.255.119 |
| 240 | 10.6.255.120/29 | 10.6.255.121 – 10.6.255.126 | 10.6.255.127 |
| 241 | 10.6.255.128/29 | 10.6.255.129 – 10.6.255.134 | 10.6.255.135 |
| 242 | 10.6.255.136/29 | 10.6.255.137 – 10.6.255.142 | 10.6.255.143 |
| 243 | 10.6.255.144/29 | 10.6.255.145 – 10.6.255.150 | 10.6.255.151 |
| 244 | 10.6.255.152/29 | 10.6.255.153 – 10.6.255.158 | 10.6.255.159 |
| 245 | 10.6.255.160/29 | 10.6.255.161 – 10.6.255.166 | 10.6.255.167 |
| 246 | 10.6.255.168/29 | 10.6.255.169 – 10.6.255.174 | 10.6.255.175 |
| 247 | 10.6.255.176/29 | 10.6.255.177 – 10.6.255.182 | 10.6.255.183 |
| 248 | 10.6.255.184/29 | 10.6.255.185 – 10.6.255.190 | 10.6.255.191 |
| 249 | 10.6.255.192/29 | 10.6.255.193 – 10.6.255.198 | 10.6.255.199 |
| 250 | 10.6.255.200/29 | 10.6.255.201 – 10.6.255.206 | 10.6.255.207 |
| 251 | 10.6.255.208/29 | 10.6.255.209 – 10.6.255.214 | 10.6.255.215 |
| 252 | 10.6.255.216/29 | 10.6.255.217 – 10.6.255.222 | 10.6.255.223 |
| 253 | 10.6.255.224/29 | 10.6.255.225 – 10.6.255.230 | 10.6.255.231 |
| 254 | 10.6.255.232/29 | 10.6.255.233 – 10.6.255.238 | 10.6.255.239 |
| 255 | 10.6.255.240/29 | 10.6.255.241 – 10.6.255.246 | 10.6.255.247 |
| 256 | 10.6.255.248/29 | 10.6.255.249 – 10.6.255.254 | 10.6.255.255 |
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 /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.