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)10.65.86.0/23
network10.65.86.0/23
broadcast10.65.87.255
first host10.65.86.1
last host10.65.87.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.65.86.0/23
address00001010.01000001.01010110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01000001.01010110.00000000
broadcast00001010.01000001.01010111.11111111
green = network part, grey = host part
hex0x0a415600
decimal172054016
reverse dns0.86.65.10.in-addr.arpa
ipv4-mapped::ffff:a41:5600
/23 split into /30 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.65.86.0/30 | 10.65.86.1 – 10.65.86.2 | 10.65.86.3 |
| 2 | 10.65.86.4/30 | 10.65.86.5 – 10.65.86.6 | 10.65.86.7 |
| 3 | 10.65.86.8/30 | 10.65.86.9 – 10.65.86.10 | 10.65.86.11 |
| 4 | 10.65.86.12/30 | 10.65.86.13 – 10.65.86.14 | 10.65.86.15 |
| 5 | 10.65.86.16/30 | 10.65.86.17 – 10.65.86.18 | 10.65.86.19 |
| 6 | 10.65.86.20/30 | 10.65.86.21 – 10.65.86.22 | 10.65.86.23 |
| 7 | 10.65.86.24/30 | 10.65.86.25 – 10.65.86.26 | 10.65.86.27 |
| 8 | 10.65.86.28/30 | 10.65.86.29 – 10.65.86.30 | 10.65.86.31 |
| 9 | 10.65.86.32/30 | 10.65.86.33 – 10.65.86.34 | 10.65.86.35 |
| 10 | 10.65.86.36/30 | 10.65.86.37 – 10.65.86.38 | 10.65.86.39 |
| 11 | 10.65.86.40/30 | 10.65.86.41 – 10.65.86.42 | 10.65.86.43 |
| 12 | 10.65.86.44/30 | 10.65.86.45 – 10.65.86.46 | 10.65.86.47 |
| 13 | 10.65.86.48/30 | 10.65.86.49 – 10.65.86.50 | 10.65.86.51 |
| 14 | 10.65.86.52/30 | 10.65.86.53 – 10.65.86.54 | 10.65.86.55 |
| 15 | 10.65.86.56/30 | 10.65.86.57 – 10.65.86.58 | 10.65.86.59 |
| 16 | 10.65.86.60/30 | 10.65.86.61 – 10.65.86.62 | 10.65.86.63 |
| 17 | 10.65.86.64/30 | 10.65.86.65 – 10.65.86.66 | 10.65.86.67 |
| 18 | 10.65.86.68/30 | 10.65.86.69 – 10.65.86.70 | 10.65.86.71 |
| 19 | 10.65.86.72/30 | 10.65.86.73 – 10.65.86.74 | 10.65.86.75 |
| 20 | 10.65.86.76/30 | 10.65.86.77 – 10.65.86.78 | 10.65.86.79 |
| 21 | 10.65.86.80/30 | 10.65.86.81 – 10.65.86.82 | 10.65.86.83 |
| 22 | 10.65.86.84/30 | 10.65.86.85 – 10.65.86.86 | 10.65.86.87 |
| 23 | 10.65.86.88/30 | 10.65.86.89 – 10.65.86.90 | 10.65.86.91 |
| 24 | 10.65.86.92/30 | 10.65.86.93 – 10.65.86.94 | 10.65.86.95 |
| 25 | 10.65.86.96/30 | 10.65.86.97 – 10.65.86.98 | 10.65.86.99 |
| 26 | 10.65.86.100/30 | 10.65.86.101 – 10.65.86.102 | 10.65.86.103 |
| 27 | 10.65.86.104/30 | 10.65.86.105 – 10.65.86.106 | 10.65.86.107 |
| 28 | 10.65.86.108/30 | 10.65.86.109 – 10.65.86.110 | 10.65.86.111 |
| 29 | 10.65.86.112/30 | 10.65.86.113 – 10.65.86.114 | 10.65.86.115 |
| 30 | 10.65.86.116/30 | 10.65.86.117 – 10.65.86.118 | 10.65.86.119 |
| 31 | 10.65.86.120/30 | 10.65.86.121 – 10.65.86.122 | 10.65.86.123 |
| 32 | 10.65.86.124/30 | 10.65.86.125 – 10.65.86.126 | 10.65.86.127 |
| 33 | 10.65.86.128/30 | 10.65.86.129 – 10.65.86.130 | 10.65.86.131 |
| 34 | 10.65.86.132/30 | 10.65.86.133 – 10.65.86.134 | 10.65.86.135 |
| 35 | 10.65.86.136/30 | 10.65.86.137 – 10.65.86.138 | 10.65.86.139 |
| 36 | 10.65.86.140/30 | 10.65.86.141 – 10.65.86.142 | 10.65.86.143 |
| 37 | 10.65.86.144/30 | 10.65.86.145 – 10.65.86.146 | 10.65.86.147 |
| 38 | 10.65.86.148/30 | 10.65.86.149 – 10.65.86.150 | 10.65.86.151 |
| 39 | 10.65.86.152/30 | 10.65.86.153 – 10.65.86.154 | 10.65.86.155 |
| 40 | 10.65.86.156/30 | 10.65.86.157 – 10.65.86.158 | 10.65.86.159 |
| 41 | 10.65.86.160/30 | 10.65.86.161 – 10.65.86.162 | 10.65.86.163 |
| 42 | 10.65.86.164/30 | 10.65.86.165 – 10.65.86.166 | 10.65.86.167 |
| 43 | 10.65.86.168/30 | 10.65.86.169 – 10.65.86.170 | 10.65.86.171 |
| 44 | 10.65.86.172/30 | 10.65.86.173 – 10.65.86.174 | 10.65.86.175 |
| 45 | 10.65.86.176/30 | 10.65.86.177 – 10.65.86.178 | 10.65.86.179 |
| 46 | 10.65.86.180/30 | 10.65.86.181 – 10.65.86.182 | 10.65.86.183 |
| 47 | 10.65.86.184/30 | 10.65.86.185 – 10.65.86.186 | 10.65.86.187 |
| 48 | 10.65.86.188/30 | 10.65.86.189 – 10.65.86.190 | 10.65.86.191 |
| 49 | 10.65.86.192/30 | 10.65.86.193 – 10.65.86.194 | 10.65.86.195 |
| 50 | 10.65.86.196/30 | 10.65.86.197 – 10.65.86.198 | 10.65.86.199 |
| 51 | 10.65.86.200/30 | 10.65.86.201 – 10.65.86.202 | 10.65.86.203 |
| 52 | 10.65.86.204/30 | 10.65.86.205 – 10.65.86.206 | 10.65.86.207 |
| 53 | 10.65.86.208/30 | 10.65.86.209 – 10.65.86.210 | 10.65.86.211 |
| 54 | 10.65.86.212/30 | 10.65.86.213 – 10.65.86.214 | 10.65.86.215 |
| 55 | 10.65.86.216/30 | 10.65.86.217 – 10.65.86.218 | 10.65.86.219 |
| 56 | 10.65.86.220/30 | 10.65.86.221 – 10.65.86.222 | 10.65.86.223 |
| 57 | 10.65.86.224/30 | 10.65.86.225 – 10.65.86.226 | 10.65.86.227 |
| 58 | 10.65.86.228/30 | 10.65.86.229 – 10.65.86.230 | 10.65.86.231 |
| 59 | 10.65.86.232/30 | 10.65.86.233 – 10.65.86.234 | 10.65.86.235 |
| 60 | 10.65.86.236/30 | 10.65.86.237 – 10.65.86.238 | 10.65.86.239 |
| 61 | 10.65.86.240/30 | 10.65.86.241 – 10.65.86.242 | 10.65.86.243 |
| 62 | 10.65.86.244/30 | 10.65.86.245 – 10.65.86.246 | 10.65.86.247 |
| 63 | 10.65.86.248/30 | 10.65.86.249 – 10.65.86.250 | 10.65.86.251 |
| 64 | 10.65.86.252/30 | 10.65.86.253 – 10.65.86.254 | 10.65.86.255 |
| 65 | 10.65.87.0/30 | 10.65.87.1 – 10.65.87.2 | 10.65.87.3 |
| 66 | 10.65.87.4/30 | 10.65.87.5 – 10.65.87.6 | 10.65.87.7 |
| 67 | 10.65.87.8/30 | 10.65.87.9 – 10.65.87.10 | 10.65.87.11 |
| 68 | 10.65.87.12/30 | 10.65.87.13 – 10.65.87.14 | 10.65.87.15 |
| 69 | 10.65.87.16/30 | 10.65.87.17 – 10.65.87.18 | 10.65.87.19 |
| 70 | 10.65.87.20/30 | 10.65.87.21 – 10.65.87.22 | 10.65.87.23 |
| 71 | 10.65.87.24/30 | 10.65.87.25 – 10.65.87.26 | 10.65.87.27 |
| 72 | 10.65.87.28/30 | 10.65.87.29 – 10.65.87.30 | 10.65.87.31 |
| 73 | 10.65.87.32/30 | 10.65.87.33 – 10.65.87.34 | 10.65.87.35 |
| 74 | 10.65.87.36/30 | 10.65.87.37 – 10.65.87.38 | 10.65.87.39 |
| 75 | 10.65.87.40/30 | 10.65.87.41 – 10.65.87.42 | 10.65.87.43 |
| 76 | 10.65.87.44/30 | 10.65.87.45 – 10.65.87.46 | 10.65.87.47 |
| 77 | 10.65.87.48/30 | 10.65.87.49 – 10.65.87.50 | 10.65.87.51 |
| 78 | 10.65.87.52/30 | 10.65.87.53 – 10.65.87.54 | 10.65.87.55 |
| 79 | 10.65.87.56/30 | 10.65.87.57 – 10.65.87.58 | 10.65.87.59 |
| 80 | 10.65.87.60/30 | 10.65.87.61 – 10.65.87.62 | 10.65.87.63 |
| 81 | 10.65.87.64/30 | 10.65.87.65 – 10.65.87.66 | 10.65.87.67 |
| 82 | 10.65.87.68/30 | 10.65.87.69 – 10.65.87.70 | 10.65.87.71 |
| 83 | 10.65.87.72/30 | 10.65.87.73 – 10.65.87.74 | 10.65.87.75 |
| 84 | 10.65.87.76/30 | 10.65.87.77 – 10.65.87.78 | 10.65.87.79 |
| 85 | 10.65.87.80/30 | 10.65.87.81 – 10.65.87.82 | 10.65.87.83 |
| 86 | 10.65.87.84/30 | 10.65.87.85 – 10.65.87.86 | 10.65.87.87 |
| 87 | 10.65.87.88/30 | 10.65.87.89 – 10.65.87.90 | 10.65.87.91 |
| 88 | 10.65.87.92/30 | 10.65.87.93 – 10.65.87.94 | 10.65.87.95 |
| 89 | 10.65.87.96/30 | 10.65.87.97 – 10.65.87.98 | 10.65.87.99 |
| 90 | 10.65.87.100/30 | 10.65.87.101 – 10.65.87.102 | 10.65.87.103 |
| 91 | 10.65.87.104/30 | 10.65.87.105 – 10.65.87.106 | 10.65.87.107 |
| 92 | 10.65.87.108/30 | 10.65.87.109 – 10.65.87.110 | 10.65.87.111 |
| 93 | 10.65.87.112/30 | 10.65.87.113 – 10.65.87.114 | 10.65.87.115 |
| 94 | 10.65.87.116/30 | 10.65.87.117 – 10.65.87.118 | 10.65.87.119 |
| 95 | 10.65.87.120/30 | 10.65.87.121 – 10.65.87.122 | 10.65.87.123 |
| 96 | 10.65.87.124/30 | 10.65.87.125 – 10.65.87.126 | 10.65.87.127 |
| 97 | 10.65.87.128/30 | 10.65.87.129 – 10.65.87.130 | 10.65.87.131 |
| 98 | 10.65.87.132/30 | 10.65.87.133 – 10.65.87.134 | 10.65.87.135 |
| 99 | 10.65.87.136/30 | 10.65.87.137 – 10.65.87.138 | 10.65.87.139 |
| 100 | 10.65.87.140/30 | 10.65.87.141 – 10.65.87.142 | 10.65.87.143 |
| 101 | 10.65.87.144/30 | 10.65.87.145 – 10.65.87.146 | 10.65.87.147 |
| 102 | 10.65.87.148/30 | 10.65.87.149 – 10.65.87.150 | 10.65.87.151 |
| 103 | 10.65.87.152/30 | 10.65.87.153 – 10.65.87.154 | 10.65.87.155 |
| 104 | 10.65.87.156/30 | 10.65.87.157 – 10.65.87.158 | 10.65.87.159 |
| 105 | 10.65.87.160/30 | 10.65.87.161 – 10.65.87.162 | 10.65.87.163 |
| 106 | 10.65.87.164/30 | 10.65.87.165 – 10.65.87.166 | 10.65.87.167 |
| 107 | 10.65.87.168/30 | 10.65.87.169 – 10.65.87.170 | 10.65.87.171 |
| 108 | 10.65.87.172/30 | 10.65.87.173 – 10.65.87.174 | 10.65.87.175 |
| 109 | 10.65.87.176/30 | 10.65.87.177 – 10.65.87.178 | 10.65.87.179 |
| 110 | 10.65.87.180/30 | 10.65.87.181 – 10.65.87.182 | 10.65.87.183 |
| 111 | 10.65.87.184/30 | 10.65.87.185 – 10.65.87.186 | 10.65.87.187 |
| 112 | 10.65.87.188/30 | 10.65.87.189 – 10.65.87.190 | 10.65.87.191 |
| 113 | 10.65.87.192/30 | 10.65.87.193 – 10.65.87.194 | 10.65.87.195 |
| 114 | 10.65.87.196/30 | 10.65.87.197 – 10.65.87.198 | 10.65.87.199 |
| 115 | 10.65.87.200/30 | 10.65.87.201 – 10.65.87.202 | 10.65.87.203 |
| 116 | 10.65.87.204/30 | 10.65.87.205 – 10.65.87.206 | 10.65.87.207 |
| 117 | 10.65.87.208/30 | 10.65.87.209 – 10.65.87.210 | 10.65.87.211 |
| 118 | 10.65.87.212/30 | 10.65.87.213 – 10.65.87.214 | 10.65.87.215 |
| 119 | 10.65.87.216/30 | 10.65.87.217 – 10.65.87.218 | 10.65.87.219 |
| 120 | 10.65.87.220/30 | 10.65.87.221 – 10.65.87.222 | 10.65.87.223 |
| 121 | 10.65.87.224/30 | 10.65.87.225 – 10.65.87.226 | 10.65.87.227 |
| 122 | 10.65.87.228/30 | 10.65.87.229 – 10.65.87.230 | 10.65.87.231 |
| 123 | 10.65.87.232/30 | 10.65.87.233 – 10.65.87.234 | 10.65.87.235 |
| 124 | 10.65.87.236/30 | 10.65.87.237 – 10.65.87.238 | 10.65.87.239 |
| 125 | 10.65.87.240/30 | 10.65.87.241 – 10.65.87.242 | 10.65.87.243 |
| 126 | 10.65.87.244/30 | 10.65.87.245 – 10.65.87.246 | 10.65.87.247 |
| 127 | 10.65.87.248/30 | 10.65.87.249 – 10.65.87.250 | 10.65.87.251 |
| 128 | 10.65.87.252/30 | 10.65.87.253 – 10.65.87.254 | 10.65.87.255 |
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.