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)10.0.250.0/23
network10.0.250.0/23
broadcast10.0.251.255
first host10.0.250.1
last host10.0.251.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.0.250.0/23
address00001010.00000000.11111010.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00000000.11111010.00000000
broadcast00001010.00000000.11111011.11111111
green = network part, grey = host part
hex0x0a00fa00
decimal167836160
reverse dns0.250.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:fa00
/23 split into /30 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.0.250.0/30 | 10.0.250.1 – 10.0.250.2 | 10.0.250.3 |
| 2 | 10.0.250.4/30 | 10.0.250.5 – 10.0.250.6 | 10.0.250.7 |
| 3 | 10.0.250.8/30 | 10.0.250.9 – 10.0.250.10 | 10.0.250.11 |
| 4 | 10.0.250.12/30 | 10.0.250.13 – 10.0.250.14 | 10.0.250.15 |
| 5 | 10.0.250.16/30 | 10.0.250.17 – 10.0.250.18 | 10.0.250.19 |
| 6 | 10.0.250.20/30 | 10.0.250.21 – 10.0.250.22 | 10.0.250.23 |
| 7 | 10.0.250.24/30 | 10.0.250.25 – 10.0.250.26 | 10.0.250.27 |
| 8 | 10.0.250.28/30 | 10.0.250.29 – 10.0.250.30 | 10.0.250.31 |
| 9 | 10.0.250.32/30 | 10.0.250.33 – 10.0.250.34 | 10.0.250.35 |
| 10 | 10.0.250.36/30 | 10.0.250.37 – 10.0.250.38 | 10.0.250.39 |
| 11 | 10.0.250.40/30 | 10.0.250.41 – 10.0.250.42 | 10.0.250.43 |
| 12 | 10.0.250.44/30 | 10.0.250.45 – 10.0.250.46 | 10.0.250.47 |
| 13 | 10.0.250.48/30 | 10.0.250.49 – 10.0.250.50 | 10.0.250.51 |
| 14 | 10.0.250.52/30 | 10.0.250.53 – 10.0.250.54 | 10.0.250.55 |
| 15 | 10.0.250.56/30 | 10.0.250.57 – 10.0.250.58 | 10.0.250.59 |
| 16 | 10.0.250.60/30 | 10.0.250.61 – 10.0.250.62 | 10.0.250.63 |
| 17 | 10.0.250.64/30 | 10.0.250.65 – 10.0.250.66 | 10.0.250.67 |
| 18 | 10.0.250.68/30 | 10.0.250.69 – 10.0.250.70 | 10.0.250.71 |
| 19 | 10.0.250.72/30 | 10.0.250.73 – 10.0.250.74 | 10.0.250.75 |
| 20 | 10.0.250.76/30 | 10.0.250.77 – 10.0.250.78 | 10.0.250.79 |
| 21 | 10.0.250.80/30 | 10.0.250.81 – 10.0.250.82 | 10.0.250.83 |
| 22 | 10.0.250.84/30 | 10.0.250.85 – 10.0.250.86 | 10.0.250.87 |
| 23 | 10.0.250.88/30 | 10.0.250.89 – 10.0.250.90 | 10.0.250.91 |
| 24 | 10.0.250.92/30 | 10.0.250.93 – 10.0.250.94 | 10.0.250.95 |
| 25 | 10.0.250.96/30 | 10.0.250.97 – 10.0.250.98 | 10.0.250.99 |
| 26 | 10.0.250.100/30 | 10.0.250.101 – 10.0.250.102 | 10.0.250.103 |
| 27 | 10.0.250.104/30 | 10.0.250.105 – 10.0.250.106 | 10.0.250.107 |
| 28 | 10.0.250.108/30 | 10.0.250.109 – 10.0.250.110 | 10.0.250.111 |
| 29 | 10.0.250.112/30 | 10.0.250.113 – 10.0.250.114 | 10.0.250.115 |
| 30 | 10.0.250.116/30 | 10.0.250.117 – 10.0.250.118 | 10.0.250.119 |
| 31 | 10.0.250.120/30 | 10.0.250.121 – 10.0.250.122 | 10.0.250.123 |
| 32 | 10.0.250.124/30 | 10.0.250.125 – 10.0.250.126 | 10.0.250.127 |
| 33 | 10.0.250.128/30 | 10.0.250.129 – 10.0.250.130 | 10.0.250.131 |
| 34 | 10.0.250.132/30 | 10.0.250.133 – 10.0.250.134 | 10.0.250.135 |
| 35 | 10.0.250.136/30 | 10.0.250.137 – 10.0.250.138 | 10.0.250.139 |
| 36 | 10.0.250.140/30 | 10.0.250.141 – 10.0.250.142 | 10.0.250.143 |
| 37 | 10.0.250.144/30 | 10.0.250.145 – 10.0.250.146 | 10.0.250.147 |
| 38 | 10.0.250.148/30 | 10.0.250.149 – 10.0.250.150 | 10.0.250.151 |
| 39 | 10.0.250.152/30 | 10.0.250.153 – 10.0.250.154 | 10.0.250.155 |
| 40 | 10.0.250.156/30 | 10.0.250.157 – 10.0.250.158 | 10.0.250.159 |
| 41 | 10.0.250.160/30 | 10.0.250.161 – 10.0.250.162 | 10.0.250.163 |
| 42 | 10.0.250.164/30 | 10.0.250.165 – 10.0.250.166 | 10.0.250.167 |
| 43 | 10.0.250.168/30 | 10.0.250.169 – 10.0.250.170 | 10.0.250.171 |
| 44 | 10.0.250.172/30 | 10.0.250.173 – 10.0.250.174 | 10.0.250.175 |
| 45 | 10.0.250.176/30 | 10.0.250.177 – 10.0.250.178 | 10.0.250.179 |
| 46 | 10.0.250.180/30 | 10.0.250.181 – 10.0.250.182 | 10.0.250.183 |
| 47 | 10.0.250.184/30 | 10.0.250.185 – 10.0.250.186 | 10.0.250.187 |
| 48 | 10.0.250.188/30 | 10.0.250.189 – 10.0.250.190 | 10.0.250.191 |
| 49 | 10.0.250.192/30 | 10.0.250.193 – 10.0.250.194 | 10.0.250.195 |
| 50 | 10.0.250.196/30 | 10.0.250.197 – 10.0.250.198 | 10.0.250.199 |
| 51 | 10.0.250.200/30 | 10.0.250.201 – 10.0.250.202 | 10.0.250.203 |
| 52 | 10.0.250.204/30 | 10.0.250.205 – 10.0.250.206 | 10.0.250.207 |
| 53 | 10.0.250.208/30 | 10.0.250.209 – 10.0.250.210 | 10.0.250.211 |
| 54 | 10.0.250.212/30 | 10.0.250.213 – 10.0.250.214 | 10.0.250.215 |
| 55 | 10.0.250.216/30 | 10.0.250.217 – 10.0.250.218 | 10.0.250.219 |
| 56 | 10.0.250.220/30 | 10.0.250.221 – 10.0.250.222 | 10.0.250.223 |
| 57 | 10.0.250.224/30 | 10.0.250.225 – 10.0.250.226 | 10.0.250.227 |
| 58 | 10.0.250.228/30 | 10.0.250.229 – 10.0.250.230 | 10.0.250.231 |
| 59 | 10.0.250.232/30 | 10.0.250.233 – 10.0.250.234 | 10.0.250.235 |
| 60 | 10.0.250.236/30 | 10.0.250.237 – 10.0.250.238 | 10.0.250.239 |
| 61 | 10.0.250.240/30 | 10.0.250.241 – 10.0.250.242 | 10.0.250.243 |
| 62 | 10.0.250.244/30 | 10.0.250.245 – 10.0.250.246 | 10.0.250.247 |
| 63 | 10.0.250.248/30 | 10.0.250.249 – 10.0.250.250 | 10.0.250.251 |
| 64 | 10.0.250.252/30 | 10.0.250.253 – 10.0.250.254 | 10.0.250.255 |
| 65 | 10.0.251.0/30 | 10.0.251.1 – 10.0.251.2 | 10.0.251.3 |
| 66 | 10.0.251.4/30 | 10.0.251.5 – 10.0.251.6 | 10.0.251.7 |
| 67 | 10.0.251.8/30 | 10.0.251.9 – 10.0.251.10 | 10.0.251.11 |
| 68 | 10.0.251.12/30 | 10.0.251.13 – 10.0.251.14 | 10.0.251.15 |
| 69 | 10.0.251.16/30 | 10.0.251.17 – 10.0.251.18 | 10.0.251.19 |
| 70 | 10.0.251.20/30 | 10.0.251.21 – 10.0.251.22 | 10.0.251.23 |
| 71 | 10.0.251.24/30 | 10.0.251.25 – 10.0.251.26 | 10.0.251.27 |
| 72 | 10.0.251.28/30 | 10.0.251.29 – 10.0.251.30 | 10.0.251.31 |
| 73 | 10.0.251.32/30 | 10.0.251.33 – 10.0.251.34 | 10.0.251.35 |
| 74 | 10.0.251.36/30 | 10.0.251.37 – 10.0.251.38 | 10.0.251.39 |
| 75 | 10.0.251.40/30 | 10.0.251.41 – 10.0.251.42 | 10.0.251.43 |
| 76 | 10.0.251.44/30 | 10.0.251.45 – 10.0.251.46 | 10.0.251.47 |
| 77 | 10.0.251.48/30 | 10.0.251.49 – 10.0.251.50 | 10.0.251.51 |
| 78 | 10.0.251.52/30 | 10.0.251.53 – 10.0.251.54 | 10.0.251.55 |
| 79 | 10.0.251.56/30 | 10.0.251.57 – 10.0.251.58 | 10.0.251.59 |
| 80 | 10.0.251.60/30 | 10.0.251.61 – 10.0.251.62 | 10.0.251.63 |
| 81 | 10.0.251.64/30 | 10.0.251.65 – 10.0.251.66 | 10.0.251.67 |
| 82 | 10.0.251.68/30 | 10.0.251.69 – 10.0.251.70 | 10.0.251.71 |
| 83 | 10.0.251.72/30 | 10.0.251.73 – 10.0.251.74 | 10.0.251.75 |
| 84 | 10.0.251.76/30 | 10.0.251.77 – 10.0.251.78 | 10.0.251.79 |
| 85 | 10.0.251.80/30 | 10.0.251.81 – 10.0.251.82 | 10.0.251.83 |
| 86 | 10.0.251.84/30 | 10.0.251.85 – 10.0.251.86 | 10.0.251.87 |
| 87 | 10.0.251.88/30 | 10.0.251.89 – 10.0.251.90 | 10.0.251.91 |
| 88 | 10.0.251.92/30 | 10.0.251.93 – 10.0.251.94 | 10.0.251.95 |
| 89 | 10.0.251.96/30 | 10.0.251.97 – 10.0.251.98 | 10.0.251.99 |
| 90 | 10.0.251.100/30 | 10.0.251.101 – 10.0.251.102 | 10.0.251.103 |
| 91 | 10.0.251.104/30 | 10.0.251.105 – 10.0.251.106 | 10.0.251.107 |
| 92 | 10.0.251.108/30 | 10.0.251.109 – 10.0.251.110 | 10.0.251.111 |
| 93 | 10.0.251.112/30 | 10.0.251.113 – 10.0.251.114 | 10.0.251.115 |
| 94 | 10.0.251.116/30 | 10.0.251.117 – 10.0.251.118 | 10.0.251.119 |
| 95 | 10.0.251.120/30 | 10.0.251.121 – 10.0.251.122 | 10.0.251.123 |
| 96 | 10.0.251.124/30 | 10.0.251.125 – 10.0.251.126 | 10.0.251.127 |
| 97 | 10.0.251.128/30 | 10.0.251.129 – 10.0.251.130 | 10.0.251.131 |
| 98 | 10.0.251.132/30 | 10.0.251.133 – 10.0.251.134 | 10.0.251.135 |
| 99 | 10.0.251.136/30 | 10.0.251.137 – 10.0.251.138 | 10.0.251.139 |
| 100 | 10.0.251.140/30 | 10.0.251.141 – 10.0.251.142 | 10.0.251.143 |
| 101 | 10.0.251.144/30 | 10.0.251.145 – 10.0.251.146 | 10.0.251.147 |
| 102 | 10.0.251.148/30 | 10.0.251.149 – 10.0.251.150 | 10.0.251.151 |
| 103 | 10.0.251.152/30 | 10.0.251.153 – 10.0.251.154 | 10.0.251.155 |
| 104 | 10.0.251.156/30 | 10.0.251.157 – 10.0.251.158 | 10.0.251.159 |
| 105 | 10.0.251.160/30 | 10.0.251.161 – 10.0.251.162 | 10.0.251.163 |
| 106 | 10.0.251.164/30 | 10.0.251.165 – 10.0.251.166 | 10.0.251.167 |
| 107 | 10.0.251.168/30 | 10.0.251.169 – 10.0.251.170 | 10.0.251.171 |
| 108 | 10.0.251.172/30 | 10.0.251.173 – 10.0.251.174 | 10.0.251.175 |
| 109 | 10.0.251.176/30 | 10.0.251.177 – 10.0.251.178 | 10.0.251.179 |
| 110 | 10.0.251.180/30 | 10.0.251.181 – 10.0.251.182 | 10.0.251.183 |
| 111 | 10.0.251.184/30 | 10.0.251.185 – 10.0.251.186 | 10.0.251.187 |
| 112 | 10.0.251.188/30 | 10.0.251.189 – 10.0.251.190 | 10.0.251.191 |
| 113 | 10.0.251.192/30 | 10.0.251.193 – 10.0.251.194 | 10.0.251.195 |
| 114 | 10.0.251.196/30 | 10.0.251.197 – 10.0.251.198 | 10.0.251.199 |
| 115 | 10.0.251.200/30 | 10.0.251.201 – 10.0.251.202 | 10.0.251.203 |
| 116 | 10.0.251.204/30 | 10.0.251.205 – 10.0.251.206 | 10.0.251.207 |
| 117 | 10.0.251.208/30 | 10.0.251.209 – 10.0.251.210 | 10.0.251.211 |
| 118 | 10.0.251.212/30 | 10.0.251.213 – 10.0.251.214 | 10.0.251.215 |
| 119 | 10.0.251.216/30 | 10.0.251.217 – 10.0.251.218 | 10.0.251.219 |
| 120 | 10.0.251.220/30 | 10.0.251.221 – 10.0.251.222 | 10.0.251.223 |
| 121 | 10.0.251.224/30 | 10.0.251.225 – 10.0.251.226 | 10.0.251.227 |
| 122 | 10.0.251.228/30 | 10.0.251.229 – 10.0.251.230 | 10.0.251.231 |
| 123 | 10.0.251.232/30 | 10.0.251.233 – 10.0.251.234 | 10.0.251.235 |
| 124 | 10.0.251.236/30 | 10.0.251.237 – 10.0.251.238 | 10.0.251.239 |
| 125 | 10.0.251.240/30 | 10.0.251.241 – 10.0.251.242 | 10.0.251.243 |
| 126 | 10.0.251.244/30 | 10.0.251.245 – 10.0.251.246 | 10.0.251.247 |
| 127 | 10.0.251.248/30 | 10.0.251.249 – 10.0.251.250 | 10.0.251.251 |
| 128 | 10.0.251.252/30 | 10.0.251.253 – 10.0.251.254 | 10.0.251.255 |
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 /23 |
|---|---|---|---|---|
| /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 | - |
| /22 | 255.255.252.0 | 1,024 | 1,022 | - |
| /23 | 255.255.254.0 | 512 | 510 | 1 |
| /24 | 255.255.255.0 | 256 | 254 | 2 split → |
| /25 | 255.255.255.128 | 128 | 126 | 4 split → |
| /26 | 255.255.255.192 | 64 | 62 | 8 split → |
| /27 | 255.255.255.224 | 32 | 30 | 16 split → |
| /28 | 255.255.255.240 | 16 | 14 | 32 split → |
| /29 | 255.255.255.248 | 8 | 6 | 64 split → |
| /30 | 255.255.255.252 | 4 | 2 | 128 split → |
| /31 | 255.255.255.254 | 2 | 2 | 256 split → |
| /32 | 255.255.255.255 | 1 | 1 | 512 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.