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)10.87.76.0/23
network10.87.76.0/23
broadcast10.87.77.255
first host10.87.76.1
last host10.87.77.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.87.76.0/23
address00001010.01010111.01001100.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01010111.01001100.00000000
broadcast00001010.01010111.01001101.11111111
green = network part, grey = host part
hex0x0a574c00
decimal173493248
reverse dns0.76.87.10.in-addr.arpa
ipv4-mapped::ffff:a57:4c00
/23 split into /30 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.87.76.0/30 | 10.87.76.1 – 10.87.76.2 | 10.87.76.3 |
| 2 | 10.87.76.4/30 | 10.87.76.5 – 10.87.76.6 | 10.87.76.7 |
| 3 | 10.87.76.8/30 | 10.87.76.9 – 10.87.76.10 | 10.87.76.11 |
| 4 | 10.87.76.12/30 | 10.87.76.13 – 10.87.76.14 | 10.87.76.15 |
| 5 | 10.87.76.16/30 | 10.87.76.17 – 10.87.76.18 | 10.87.76.19 |
| 6 | 10.87.76.20/30 | 10.87.76.21 – 10.87.76.22 | 10.87.76.23 |
| 7 | 10.87.76.24/30 | 10.87.76.25 – 10.87.76.26 | 10.87.76.27 |
| 8 | 10.87.76.28/30 | 10.87.76.29 – 10.87.76.30 | 10.87.76.31 |
| 9 | 10.87.76.32/30 | 10.87.76.33 – 10.87.76.34 | 10.87.76.35 |
| 10 | 10.87.76.36/30 | 10.87.76.37 – 10.87.76.38 | 10.87.76.39 |
| 11 | 10.87.76.40/30 | 10.87.76.41 – 10.87.76.42 | 10.87.76.43 |
| 12 | 10.87.76.44/30 | 10.87.76.45 – 10.87.76.46 | 10.87.76.47 |
| 13 | 10.87.76.48/30 | 10.87.76.49 – 10.87.76.50 | 10.87.76.51 |
| 14 | 10.87.76.52/30 | 10.87.76.53 – 10.87.76.54 | 10.87.76.55 |
| 15 | 10.87.76.56/30 | 10.87.76.57 – 10.87.76.58 | 10.87.76.59 |
| 16 | 10.87.76.60/30 | 10.87.76.61 – 10.87.76.62 | 10.87.76.63 |
| 17 | 10.87.76.64/30 | 10.87.76.65 – 10.87.76.66 | 10.87.76.67 |
| 18 | 10.87.76.68/30 | 10.87.76.69 – 10.87.76.70 | 10.87.76.71 |
| 19 | 10.87.76.72/30 | 10.87.76.73 – 10.87.76.74 | 10.87.76.75 |
| 20 | 10.87.76.76/30 | 10.87.76.77 – 10.87.76.78 | 10.87.76.79 |
| 21 | 10.87.76.80/30 | 10.87.76.81 – 10.87.76.82 | 10.87.76.83 |
| 22 | 10.87.76.84/30 | 10.87.76.85 – 10.87.76.86 | 10.87.76.87 |
| 23 | 10.87.76.88/30 | 10.87.76.89 – 10.87.76.90 | 10.87.76.91 |
| 24 | 10.87.76.92/30 | 10.87.76.93 – 10.87.76.94 | 10.87.76.95 |
| 25 | 10.87.76.96/30 | 10.87.76.97 – 10.87.76.98 | 10.87.76.99 |
| 26 | 10.87.76.100/30 | 10.87.76.101 – 10.87.76.102 | 10.87.76.103 |
| 27 | 10.87.76.104/30 | 10.87.76.105 – 10.87.76.106 | 10.87.76.107 |
| 28 | 10.87.76.108/30 | 10.87.76.109 – 10.87.76.110 | 10.87.76.111 |
| 29 | 10.87.76.112/30 | 10.87.76.113 – 10.87.76.114 | 10.87.76.115 |
| 30 | 10.87.76.116/30 | 10.87.76.117 – 10.87.76.118 | 10.87.76.119 |
| 31 | 10.87.76.120/30 | 10.87.76.121 – 10.87.76.122 | 10.87.76.123 |
| 32 | 10.87.76.124/30 | 10.87.76.125 – 10.87.76.126 | 10.87.76.127 |
| 33 | 10.87.76.128/30 | 10.87.76.129 – 10.87.76.130 | 10.87.76.131 |
| 34 | 10.87.76.132/30 | 10.87.76.133 – 10.87.76.134 | 10.87.76.135 |
| 35 | 10.87.76.136/30 | 10.87.76.137 – 10.87.76.138 | 10.87.76.139 |
| 36 | 10.87.76.140/30 | 10.87.76.141 – 10.87.76.142 | 10.87.76.143 |
| 37 | 10.87.76.144/30 | 10.87.76.145 – 10.87.76.146 | 10.87.76.147 |
| 38 | 10.87.76.148/30 | 10.87.76.149 – 10.87.76.150 | 10.87.76.151 |
| 39 | 10.87.76.152/30 | 10.87.76.153 – 10.87.76.154 | 10.87.76.155 |
| 40 | 10.87.76.156/30 | 10.87.76.157 – 10.87.76.158 | 10.87.76.159 |
| 41 | 10.87.76.160/30 | 10.87.76.161 – 10.87.76.162 | 10.87.76.163 |
| 42 | 10.87.76.164/30 | 10.87.76.165 – 10.87.76.166 | 10.87.76.167 |
| 43 | 10.87.76.168/30 | 10.87.76.169 – 10.87.76.170 | 10.87.76.171 |
| 44 | 10.87.76.172/30 | 10.87.76.173 – 10.87.76.174 | 10.87.76.175 |
| 45 | 10.87.76.176/30 | 10.87.76.177 – 10.87.76.178 | 10.87.76.179 |
| 46 | 10.87.76.180/30 | 10.87.76.181 – 10.87.76.182 | 10.87.76.183 |
| 47 | 10.87.76.184/30 | 10.87.76.185 – 10.87.76.186 | 10.87.76.187 |
| 48 | 10.87.76.188/30 | 10.87.76.189 – 10.87.76.190 | 10.87.76.191 |
| 49 | 10.87.76.192/30 | 10.87.76.193 – 10.87.76.194 | 10.87.76.195 |
| 50 | 10.87.76.196/30 | 10.87.76.197 – 10.87.76.198 | 10.87.76.199 |
| 51 | 10.87.76.200/30 | 10.87.76.201 – 10.87.76.202 | 10.87.76.203 |
| 52 | 10.87.76.204/30 | 10.87.76.205 – 10.87.76.206 | 10.87.76.207 |
| 53 | 10.87.76.208/30 | 10.87.76.209 – 10.87.76.210 | 10.87.76.211 |
| 54 | 10.87.76.212/30 | 10.87.76.213 – 10.87.76.214 | 10.87.76.215 |
| 55 | 10.87.76.216/30 | 10.87.76.217 – 10.87.76.218 | 10.87.76.219 |
| 56 | 10.87.76.220/30 | 10.87.76.221 – 10.87.76.222 | 10.87.76.223 |
| 57 | 10.87.76.224/30 | 10.87.76.225 – 10.87.76.226 | 10.87.76.227 |
| 58 | 10.87.76.228/30 | 10.87.76.229 – 10.87.76.230 | 10.87.76.231 |
| 59 | 10.87.76.232/30 | 10.87.76.233 – 10.87.76.234 | 10.87.76.235 |
| 60 | 10.87.76.236/30 | 10.87.76.237 – 10.87.76.238 | 10.87.76.239 |
| 61 | 10.87.76.240/30 | 10.87.76.241 – 10.87.76.242 | 10.87.76.243 |
| 62 | 10.87.76.244/30 | 10.87.76.245 – 10.87.76.246 | 10.87.76.247 |
| 63 | 10.87.76.248/30 | 10.87.76.249 – 10.87.76.250 | 10.87.76.251 |
| 64 | 10.87.76.252/30 | 10.87.76.253 – 10.87.76.254 | 10.87.76.255 |
| 65 | 10.87.77.0/30 | 10.87.77.1 – 10.87.77.2 | 10.87.77.3 |
| 66 | 10.87.77.4/30 | 10.87.77.5 – 10.87.77.6 | 10.87.77.7 |
| 67 | 10.87.77.8/30 | 10.87.77.9 – 10.87.77.10 | 10.87.77.11 |
| 68 | 10.87.77.12/30 | 10.87.77.13 – 10.87.77.14 | 10.87.77.15 |
| 69 | 10.87.77.16/30 | 10.87.77.17 – 10.87.77.18 | 10.87.77.19 |
| 70 | 10.87.77.20/30 | 10.87.77.21 – 10.87.77.22 | 10.87.77.23 |
| 71 | 10.87.77.24/30 | 10.87.77.25 – 10.87.77.26 | 10.87.77.27 |
| 72 | 10.87.77.28/30 | 10.87.77.29 – 10.87.77.30 | 10.87.77.31 |
| 73 | 10.87.77.32/30 | 10.87.77.33 – 10.87.77.34 | 10.87.77.35 |
| 74 | 10.87.77.36/30 | 10.87.77.37 – 10.87.77.38 | 10.87.77.39 |
| 75 | 10.87.77.40/30 | 10.87.77.41 – 10.87.77.42 | 10.87.77.43 |
| 76 | 10.87.77.44/30 | 10.87.77.45 – 10.87.77.46 | 10.87.77.47 |
| 77 | 10.87.77.48/30 | 10.87.77.49 – 10.87.77.50 | 10.87.77.51 |
| 78 | 10.87.77.52/30 | 10.87.77.53 – 10.87.77.54 | 10.87.77.55 |
| 79 | 10.87.77.56/30 | 10.87.77.57 – 10.87.77.58 | 10.87.77.59 |
| 80 | 10.87.77.60/30 | 10.87.77.61 – 10.87.77.62 | 10.87.77.63 |
| 81 | 10.87.77.64/30 | 10.87.77.65 – 10.87.77.66 | 10.87.77.67 |
| 82 | 10.87.77.68/30 | 10.87.77.69 – 10.87.77.70 | 10.87.77.71 |
| 83 | 10.87.77.72/30 | 10.87.77.73 – 10.87.77.74 | 10.87.77.75 |
| 84 | 10.87.77.76/30 | 10.87.77.77 – 10.87.77.78 | 10.87.77.79 |
| 85 | 10.87.77.80/30 | 10.87.77.81 – 10.87.77.82 | 10.87.77.83 |
| 86 | 10.87.77.84/30 | 10.87.77.85 – 10.87.77.86 | 10.87.77.87 |
| 87 | 10.87.77.88/30 | 10.87.77.89 – 10.87.77.90 | 10.87.77.91 |
| 88 | 10.87.77.92/30 | 10.87.77.93 – 10.87.77.94 | 10.87.77.95 |
| 89 | 10.87.77.96/30 | 10.87.77.97 – 10.87.77.98 | 10.87.77.99 |
| 90 | 10.87.77.100/30 | 10.87.77.101 – 10.87.77.102 | 10.87.77.103 |
| 91 | 10.87.77.104/30 | 10.87.77.105 – 10.87.77.106 | 10.87.77.107 |
| 92 | 10.87.77.108/30 | 10.87.77.109 – 10.87.77.110 | 10.87.77.111 |
| 93 | 10.87.77.112/30 | 10.87.77.113 – 10.87.77.114 | 10.87.77.115 |
| 94 | 10.87.77.116/30 | 10.87.77.117 – 10.87.77.118 | 10.87.77.119 |
| 95 | 10.87.77.120/30 | 10.87.77.121 – 10.87.77.122 | 10.87.77.123 |
| 96 | 10.87.77.124/30 | 10.87.77.125 – 10.87.77.126 | 10.87.77.127 |
| 97 | 10.87.77.128/30 | 10.87.77.129 – 10.87.77.130 | 10.87.77.131 |
| 98 | 10.87.77.132/30 | 10.87.77.133 – 10.87.77.134 | 10.87.77.135 |
| 99 | 10.87.77.136/30 | 10.87.77.137 – 10.87.77.138 | 10.87.77.139 |
| 100 | 10.87.77.140/30 | 10.87.77.141 – 10.87.77.142 | 10.87.77.143 |
| 101 | 10.87.77.144/30 | 10.87.77.145 – 10.87.77.146 | 10.87.77.147 |
| 102 | 10.87.77.148/30 | 10.87.77.149 – 10.87.77.150 | 10.87.77.151 |
| 103 | 10.87.77.152/30 | 10.87.77.153 – 10.87.77.154 | 10.87.77.155 |
| 104 | 10.87.77.156/30 | 10.87.77.157 – 10.87.77.158 | 10.87.77.159 |
| 105 | 10.87.77.160/30 | 10.87.77.161 – 10.87.77.162 | 10.87.77.163 |
| 106 | 10.87.77.164/30 | 10.87.77.165 – 10.87.77.166 | 10.87.77.167 |
| 107 | 10.87.77.168/30 | 10.87.77.169 – 10.87.77.170 | 10.87.77.171 |
| 108 | 10.87.77.172/30 | 10.87.77.173 – 10.87.77.174 | 10.87.77.175 |
| 109 | 10.87.77.176/30 | 10.87.77.177 – 10.87.77.178 | 10.87.77.179 |
| 110 | 10.87.77.180/30 | 10.87.77.181 – 10.87.77.182 | 10.87.77.183 |
| 111 | 10.87.77.184/30 | 10.87.77.185 – 10.87.77.186 | 10.87.77.187 |
| 112 | 10.87.77.188/30 | 10.87.77.189 – 10.87.77.190 | 10.87.77.191 |
| 113 | 10.87.77.192/30 | 10.87.77.193 – 10.87.77.194 | 10.87.77.195 |
| 114 | 10.87.77.196/30 | 10.87.77.197 – 10.87.77.198 | 10.87.77.199 |
| 115 | 10.87.77.200/30 | 10.87.77.201 – 10.87.77.202 | 10.87.77.203 |
| 116 | 10.87.77.204/30 | 10.87.77.205 – 10.87.77.206 | 10.87.77.207 |
| 117 | 10.87.77.208/30 | 10.87.77.209 – 10.87.77.210 | 10.87.77.211 |
| 118 | 10.87.77.212/30 | 10.87.77.213 – 10.87.77.214 | 10.87.77.215 |
| 119 | 10.87.77.216/30 | 10.87.77.217 – 10.87.77.218 | 10.87.77.219 |
| 120 | 10.87.77.220/30 | 10.87.77.221 – 10.87.77.222 | 10.87.77.223 |
| 121 | 10.87.77.224/30 | 10.87.77.225 – 10.87.77.226 | 10.87.77.227 |
| 122 | 10.87.77.228/30 | 10.87.77.229 – 10.87.77.230 | 10.87.77.231 |
| 123 | 10.87.77.232/30 | 10.87.77.233 – 10.87.77.234 | 10.87.77.235 |
| 124 | 10.87.77.236/30 | 10.87.77.237 – 10.87.77.238 | 10.87.77.239 |
| 125 | 10.87.77.240/30 | 10.87.77.241 – 10.87.77.242 | 10.87.77.243 |
| 126 | 10.87.77.244/30 | 10.87.77.245 – 10.87.77.246 | 10.87.77.247 |
| 127 | 10.87.77.248/30 | 10.87.77.249 – 10.87.77.250 | 10.87.77.251 |
| 128 | 10.87.77.252/30 | 10.87.77.253 – 10.87.77.254 | 10.87.77.255 |
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.