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)10.87.158.0/23
network10.87.158.0/23
broadcast10.87.159.255
first host10.87.158.1
last host10.87.159.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.87.158.0/23
address00001010.01010111.10011110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01010111.10011110.00000000
broadcast00001010.01010111.10011111.11111111
green = network part, grey = host part
hex0x0a579e00
decimal173514240
reverse dns0.158.87.10.in-addr.arpa
ipv4-mapped::ffff:a57:9e00
/23 split into /30 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.87.158.0/30 | 10.87.158.1 – 10.87.158.2 | 10.87.158.3 |
| 2 | 10.87.158.4/30 | 10.87.158.5 – 10.87.158.6 | 10.87.158.7 |
| 3 | 10.87.158.8/30 | 10.87.158.9 – 10.87.158.10 | 10.87.158.11 |
| 4 | 10.87.158.12/30 | 10.87.158.13 – 10.87.158.14 | 10.87.158.15 |
| 5 | 10.87.158.16/30 | 10.87.158.17 – 10.87.158.18 | 10.87.158.19 |
| 6 | 10.87.158.20/30 | 10.87.158.21 – 10.87.158.22 | 10.87.158.23 |
| 7 | 10.87.158.24/30 | 10.87.158.25 – 10.87.158.26 | 10.87.158.27 |
| 8 | 10.87.158.28/30 | 10.87.158.29 – 10.87.158.30 | 10.87.158.31 |
| 9 | 10.87.158.32/30 | 10.87.158.33 – 10.87.158.34 | 10.87.158.35 |
| 10 | 10.87.158.36/30 | 10.87.158.37 – 10.87.158.38 | 10.87.158.39 |
| 11 | 10.87.158.40/30 | 10.87.158.41 – 10.87.158.42 | 10.87.158.43 |
| 12 | 10.87.158.44/30 | 10.87.158.45 – 10.87.158.46 | 10.87.158.47 |
| 13 | 10.87.158.48/30 | 10.87.158.49 – 10.87.158.50 | 10.87.158.51 |
| 14 | 10.87.158.52/30 | 10.87.158.53 – 10.87.158.54 | 10.87.158.55 |
| 15 | 10.87.158.56/30 | 10.87.158.57 – 10.87.158.58 | 10.87.158.59 |
| 16 | 10.87.158.60/30 | 10.87.158.61 – 10.87.158.62 | 10.87.158.63 |
| 17 | 10.87.158.64/30 | 10.87.158.65 – 10.87.158.66 | 10.87.158.67 |
| 18 | 10.87.158.68/30 | 10.87.158.69 – 10.87.158.70 | 10.87.158.71 |
| 19 | 10.87.158.72/30 | 10.87.158.73 – 10.87.158.74 | 10.87.158.75 |
| 20 | 10.87.158.76/30 | 10.87.158.77 – 10.87.158.78 | 10.87.158.79 |
| 21 | 10.87.158.80/30 | 10.87.158.81 – 10.87.158.82 | 10.87.158.83 |
| 22 | 10.87.158.84/30 | 10.87.158.85 – 10.87.158.86 | 10.87.158.87 |
| 23 | 10.87.158.88/30 | 10.87.158.89 – 10.87.158.90 | 10.87.158.91 |
| 24 | 10.87.158.92/30 | 10.87.158.93 – 10.87.158.94 | 10.87.158.95 |
| 25 | 10.87.158.96/30 | 10.87.158.97 – 10.87.158.98 | 10.87.158.99 |
| 26 | 10.87.158.100/30 | 10.87.158.101 – 10.87.158.102 | 10.87.158.103 |
| 27 | 10.87.158.104/30 | 10.87.158.105 – 10.87.158.106 | 10.87.158.107 |
| 28 | 10.87.158.108/30 | 10.87.158.109 – 10.87.158.110 | 10.87.158.111 |
| 29 | 10.87.158.112/30 | 10.87.158.113 – 10.87.158.114 | 10.87.158.115 |
| 30 | 10.87.158.116/30 | 10.87.158.117 – 10.87.158.118 | 10.87.158.119 |
| 31 | 10.87.158.120/30 | 10.87.158.121 – 10.87.158.122 | 10.87.158.123 |
| 32 | 10.87.158.124/30 | 10.87.158.125 – 10.87.158.126 | 10.87.158.127 |
| 33 | 10.87.158.128/30 | 10.87.158.129 – 10.87.158.130 | 10.87.158.131 |
| 34 | 10.87.158.132/30 | 10.87.158.133 – 10.87.158.134 | 10.87.158.135 |
| 35 | 10.87.158.136/30 | 10.87.158.137 – 10.87.158.138 | 10.87.158.139 |
| 36 | 10.87.158.140/30 | 10.87.158.141 – 10.87.158.142 | 10.87.158.143 |
| 37 | 10.87.158.144/30 | 10.87.158.145 – 10.87.158.146 | 10.87.158.147 |
| 38 | 10.87.158.148/30 | 10.87.158.149 – 10.87.158.150 | 10.87.158.151 |
| 39 | 10.87.158.152/30 | 10.87.158.153 – 10.87.158.154 | 10.87.158.155 |
| 40 | 10.87.158.156/30 | 10.87.158.157 – 10.87.158.158 | 10.87.158.159 |
| 41 | 10.87.158.160/30 | 10.87.158.161 – 10.87.158.162 | 10.87.158.163 |
| 42 | 10.87.158.164/30 | 10.87.158.165 – 10.87.158.166 | 10.87.158.167 |
| 43 | 10.87.158.168/30 | 10.87.158.169 – 10.87.158.170 | 10.87.158.171 |
| 44 | 10.87.158.172/30 | 10.87.158.173 – 10.87.158.174 | 10.87.158.175 |
| 45 | 10.87.158.176/30 | 10.87.158.177 – 10.87.158.178 | 10.87.158.179 |
| 46 | 10.87.158.180/30 | 10.87.158.181 – 10.87.158.182 | 10.87.158.183 |
| 47 | 10.87.158.184/30 | 10.87.158.185 – 10.87.158.186 | 10.87.158.187 |
| 48 | 10.87.158.188/30 | 10.87.158.189 – 10.87.158.190 | 10.87.158.191 |
| 49 | 10.87.158.192/30 | 10.87.158.193 – 10.87.158.194 | 10.87.158.195 |
| 50 | 10.87.158.196/30 | 10.87.158.197 – 10.87.158.198 | 10.87.158.199 |
| 51 | 10.87.158.200/30 | 10.87.158.201 – 10.87.158.202 | 10.87.158.203 |
| 52 | 10.87.158.204/30 | 10.87.158.205 – 10.87.158.206 | 10.87.158.207 |
| 53 | 10.87.158.208/30 | 10.87.158.209 – 10.87.158.210 | 10.87.158.211 |
| 54 | 10.87.158.212/30 | 10.87.158.213 – 10.87.158.214 | 10.87.158.215 |
| 55 | 10.87.158.216/30 | 10.87.158.217 – 10.87.158.218 | 10.87.158.219 |
| 56 | 10.87.158.220/30 | 10.87.158.221 – 10.87.158.222 | 10.87.158.223 |
| 57 | 10.87.158.224/30 | 10.87.158.225 – 10.87.158.226 | 10.87.158.227 |
| 58 | 10.87.158.228/30 | 10.87.158.229 – 10.87.158.230 | 10.87.158.231 |
| 59 | 10.87.158.232/30 | 10.87.158.233 – 10.87.158.234 | 10.87.158.235 |
| 60 | 10.87.158.236/30 | 10.87.158.237 – 10.87.158.238 | 10.87.158.239 |
| 61 | 10.87.158.240/30 | 10.87.158.241 – 10.87.158.242 | 10.87.158.243 |
| 62 | 10.87.158.244/30 | 10.87.158.245 – 10.87.158.246 | 10.87.158.247 |
| 63 | 10.87.158.248/30 | 10.87.158.249 – 10.87.158.250 | 10.87.158.251 |
| 64 | 10.87.158.252/30 | 10.87.158.253 – 10.87.158.254 | 10.87.158.255 |
| 65 | 10.87.159.0/30 | 10.87.159.1 – 10.87.159.2 | 10.87.159.3 |
| 66 | 10.87.159.4/30 | 10.87.159.5 – 10.87.159.6 | 10.87.159.7 |
| 67 | 10.87.159.8/30 | 10.87.159.9 – 10.87.159.10 | 10.87.159.11 |
| 68 | 10.87.159.12/30 | 10.87.159.13 – 10.87.159.14 | 10.87.159.15 |
| 69 | 10.87.159.16/30 | 10.87.159.17 – 10.87.159.18 | 10.87.159.19 |
| 70 | 10.87.159.20/30 | 10.87.159.21 – 10.87.159.22 | 10.87.159.23 |
| 71 | 10.87.159.24/30 | 10.87.159.25 – 10.87.159.26 | 10.87.159.27 |
| 72 | 10.87.159.28/30 | 10.87.159.29 – 10.87.159.30 | 10.87.159.31 |
| 73 | 10.87.159.32/30 | 10.87.159.33 – 10.87.159.34 | 10.87.159.35 |
| 74 | 10.87.159.36/30 | 10.87.159.37 – 10.87.159.38 | 10.87.159.39 |
| 75 | 10.87.159.40/30 | 10.87.159.41 – 10.87.159.42 | 10.87.159.43 |
| 76 | 10.87.159.44/30 | 10.87.159.45 – 10.87.159.46 | 10.87.159.47 |
| 77 | 10.87.159.48/30 | 10.87.159.49 – 10.87.159.50 | 10.87.159.51 |
| 78 | 10.87.159.52/30 | 10.87.159.53 – 10.87.159.54 | 10.87.159.55 |
| 79 | 10.87.159.56/30 | 10.87.159.57 – 10.87.159.58 | 10.87.159.59 |
| 80 | 10.87.159.60/30 | 10.87.159.61 – 10.87.159.62 | 10.87.159.63 |
| 81 | 10.87.159.64/30 | 10.87.159.65 – 10.87.159.66 | 10.87.159.67 |
| 82 | 10.87.159.68/30 | 10.87.159.69 – 10.87.159.70 | 10.87.159.71 |
| 83 | 10.87.159.72/30 | 10.87.159.73 – 10.87.159.74 | 10.87.159.75 |
| 84 | 10.87.159.76/30 | 10.87.159.77 – 10.87.159.78 | 10.87.159.79 |
| 85 | 10.87.159.80/30 | 10.87.159.81 – 10.87.159.82 | 10.87.159.83 |
| 86 | 10.87.159.84/30 | 10.87.159.85 – 10.87.159.86 | 10.87.159.87 |
| 87 | 10.87.159.88/30 | 10.87.159.89 – 10.87.159.90 | 10.87.159.91 |
| 88 | 10.87.159.92/30 | 10.87.159.93 – 10.87.159.94 | 10.87.159.95 |
| 89 | 10.87.159.96/30 | 10.87.159.97 – 10.87.159.98 | 10.87.159.99 |
| 90 | 10.87.159.100/30 | 10.87.159.101 – 10.87.159.102 | 10.87.159.103 |
| 91 | 10.87.159.104/30 | 10.87.159.105 – 10.87.159.106 | 10.87.159.107 |
| 92 | 10.87.159.108/30 | 10.87.159.109 – 10.87.159.110 | 10.87.159.111 |
| 93 | 10.87.159.112/30 | 10.87.159.113 – 10.87.159.114 | 10.87.159.115 |
| 94 | 10.87.159.116/30 | 10.87.159.117 – 10.87.159.118 | 10.87.159.119 |
| 95 | 10.87.159.120/30 | 10.87.159.121 – 10.87.159.122 | 10.87.159.123 |
| 96 | 10.87.159.124/30 | 10.87.159.125 – 10.87.159.126 | 10.87.159.127 |
| 97 | 10.87.159.128/30 | 10.87.159.129 – 10.87.159.130 | 10.87.159.131 |
| 98 | 10.87.159.132/30 | 10.87.159.133 – 10.87.159.134 | 10.87.159.135 |
| 99 | 10.87.159.136/30 | 10.87.159.137 – 10.87.159.138 | 10.87.159.139 |
| 100 | 10.87.159.140/30 | 10.87.159.141 – 10.87.159.142 | 10.87.159.143 |
| 101 | 10.87.159.144/30 | 10.87.159.145 – 10.87.159.146 | 10.87.159.147 |
| 102 | 10.87.159.148/30 | 10.87.159.149 – 10.87.159.150 | 10.87.159.151 |
| 103 | 10.87.159.152/30 | 10.87.159.153 – 10.87.159.154 | 10.87.159.155 |
| 104 | 10.87.159.156/30 | 10.87.159.157 – 10.87.159.158 | 10.87.159.159 |
| 105 | 10.87.159.160/30 | 10.87.159.161 – 10.87.159.162 | 10.87.159.163 |
| 106 | 10.87.159.164/30 | 10.87.159.165 – 10.87.159.166 | 10.87.159.167 |
| 107 | 10.87.159.168/30 | 10.87.159.169 – 10.87.159.170 | 10.87.159.171 |
| 108 | 10.87.159.172/30 | 10.87.159.173 – 10.87.159.174 | 10.87.159.175 |
| 109 | 10.87.159.176/30 | 10.87.159.177 – 10.87.159.178 | 10.87.159.179 |
| 110 | 10.87.159.180/30 | 10.87.159.181 – 10.87.159.182 | 10.87.159.183 |
| 111 | 10.87.159.184/30 | 10.87.159.185 – 10.87.159.186 | 10.87.159.187 |
| 112 | 10.87.159.188/30 | 10.87.159.189 – 10.87.159.190 | 10.87.159.191 |
| 113 | 10.87.159.192/30 | 10.87.159.193 – 10.87.159.194 | 10.87.159.195 |
| 114 | 10.87.159.196/30 | 10.87.159.197 – 10.87.159.198 | 10.87.159.199 |
| 115 | 10.87.159.200/30 | 10.87.159.201 – 10.87.159.202 | 10.87.159.203 |
| 116 | 10.87.159.204/30 | 10.87.159.205 – 10.87.159.206 | 10.87.159.207 |
| 117 | 10.87.159.208/30 | 10.87.159.209 – 10.87.159.210 | 10.87.159.211 |
| 118 | 10.87.159.212/30 | 10.87.159.213 – 10.87.159.214 | 10.87.159.215 |
| 119 | 10.87.159.216/30 | 10.87.159.217 – 10.87.159.218 | 10.87.159.219 |
| 120 | 10.87.159.220/30 | 10.87.159.221 – 10.87.159.222 | 10.87.159.223 |
| 121 | 10.87.159.224/30 | 10.87.159.225 – 10.87.159.226 | 10.87.159.227 |
| 122 | 10.87.159.228/30 | 10.87.159.229 – 10.87.159.230 | 10.87.159.231 |
| 123 | 10.87.159.232/30 | 10.87.159.233 – 10.87.159.234 | 10.87.159.235 |
| 124 | 10.87.159.236/30 | 10.87.159.237 – 10.87.159.238 | 10.87.159.239 |
| 125 | 10.87.159.240/30 | 10.87.159.241 – 10.87.159.242 | 10.87.159.243 |
| 126 | 10.87.159.244/30 | 10.87.159.245 – 10.87.159.246 | 10.87.159.247 |
| 127 | 10.87.159.248/30 | 10.87.159.249 – 10.87.159.250 | 10.87.159.251 |
| 128 | 10.87.159.252/30 | 10.87.159.253 – 10.87.159.254 | 10.87.159.255 |
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.