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)10.99.74.0/23
network10.99.74.0/23
broadcast10.99.75.255
first host10.99.74.1
last host10.99.75.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.99.74.0/23
address00001010.01100011.01001010.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01100011.01001010.00000000
broadcast00001010.01100011.01001011.11111111
green = network part, grey = host part
hex0x0a634a00
decimal174279168
reverse dns0.74.99.10.in-addr.arpa
ipv4-mapped::ffff:a63:4a00
/23 split into /30 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.99.74.0/30 | 10.99.74.1 – 10.99.74.2 | 10.99.74.3 |
| 2 | 10.99.74.4/30 | 10.99.74.5 – 10.99.74.6 | 10.99.74.7 |
| 3 | 10.99.74.8/30 | 10.99.74.9 – 10.99.74.10 | 10.99.74.11 |
| 4 | 10.99.74.12/30 | 10.99.74.13 – 10.99.74.14 | 10.99.74.15 |
| 5 | 10.99.74.16/30 | 10.99.74.17 – 10.99.74.18 | 10.99.74.19 |
| 6 | 10.99.74.20/30 | 10.99.74.21 – 10.99.74.22 | 10.99.74.23 |
| 7 | 10.99.74.24/30 | 10.99.74.25 – 10.99.74.26 | 10.99.74.27 |
| 8 | 10.99.74.28/30 | 10.99.74.29 – 10.99.74.30 | 10.99.74.31 |
| 9 | 10.99.74.32/30 | 10.99.74.33 – 10.99.74.34 | 10.99.74.35 |
| 10 | 10.99.74.36/30 | 10.99.74.37 – 10.99.74.38 | 10.99.74.39 |
| 11 | 10.99.74.40/30 | 10.99.74.41 – 10.99.74.42 | 10.99.74.43 |
| 12 | 10.99.74.44/30 | 10.99.74.45 – 10.99.74.46 | 10.99.74.47 |
| 13 | 10.99.74.48/30 | 10.99.74.49 – 10.99.74.50 | 10.99.74.51 |
| 14 | 10.99.74.52/30 | 10.99.74.53 – 10.99.74.54 | 10.99.74.55 |
| 15 | 10.99.74.56/30 | 10.99.74.57 – 10.99.74.58 | 10.99.74.59 |
| 16 | 10.99.74.60/30 | 10.99.74.61 – 10.99.74.62 | 10.99.74.63 |
| 17 | 10.99.74.64/30 | 10.99.74.65 – 10.99.74.66 | 10.99.74.67 |
| 18 | 10.99.74.68/30 | 10.99.74.69 – 10.99.74.70 | 10.99.74.71 |
| 19 | 10.99.74.72/30 | 10.99.74.73 – 10.99.74.74 | 10.99.74.75 |
| 20 | 10.99.74.76/30 | 10.99.74.77 – 10.99.74.78 | 10.99.74.79 |
| 21 | 10.99.74.80/30 | 10.99.74.81 – 10.99.74.82 | 10.99.74.83 |
| 22 | 10.99.74.84/30 | 10.99.74.85 – 10.99.74.86 | 10.99.74.87 |
| 23 | 10.99.74.88/30 | 10.99.74.89 – 10.99.74.90 | 10.99.74.91 |
| 24 | 10.99.74.92/30 | 10.99.74.93 – 10.99.74.94 | 10.99.74.95 |
| 25 | 10.99.74.96/30 | 10.99.74.97 – 10.99.74.98 | 10.99.74.99 |
| 26 | 10.99.74.100/30 | 10.99.74.101 – 10.99.74.102 | 10.99.74.103 |
| 27 | 10.99.74.104/30 | 10.99.74.105 – 10.99.74.106 | 10.99.74.107 |
| 28 | 10.99.74.108/30 | 10.99.74.109 – 10.99.74.110 | 10.99.74.111 |
| 29 | 10.99.74.112/30 | 10.99.74.113 – 10.99.74.114 | 10.99.74.115 |
| 30 | 10.99.74.116/30 | 10.99.74.117 – 10.99.74.118 | 10.99.74.119 |
| 31 | 10.99.74.120/30 | 10.99.74.121 – 10.99.74.122 | 10.99.74.123 |
| 32 | 10.99.74.124/30 | 10.99.74.125 – 10.99.74.126 | 10.99.74.127 |
| 33 | 10.99.74.128/30 | 10.99.74.129 – 10.99.74.130 | 10.99.74.131 |
| 34 | 10.99.74.132/30 | 10.99.74.133 – 10.99.74.134 | 10.99.74.135 |
| 35 | 10.99.74.136/30 | 10.99.74.137 – 10.99.74.138 | 10.99.74.139 |
| 36 | 10.99.74.140/30 | 10.99.74.141 – 10.99.74.142 | 10.99.74.143 |
| 37 | 10.99.74.144/30 | 10.99.74.145 – 10.99.74.146 | 10.99.74.147 |
| 38 | 10.99.74.148/30 | 10.99.74.149 – 10.99.74.150 | 10.99.74.151 |
| 39 | 10.99.74.152/30 | 10.99.74.153 – 10.99.74.154 | 10.99.74.155 |
| 40 | 10.99.74.156/30 | 10.99.74.157 – 10.99.74.158 | 10.99.74.159 |
| 41 | 10.99.74.160/30 | 10.99.74.161 – 10.99.74.162 | 10.99.74.163 |
| 42 | 10.99.74.164/30 | 10.99.74.165 – 10.99.74.166 | 10.99.74.167 |
| 43 | 10.99.74.168/30 | 10.99.74.169 – 10.99.74.170 | 10.99.74.171 |
| 44 | 10.99.74.172/30 | 10.99.74.173 – 10.99.74.174 | 10.99.74.175 |
| 45 | 10.99.74.176/30 | 10.99.74.177 – 10.99.74.178 | 10.99.74.179 |
| 46 | 10.99.74.180/30 | 10.99.74.181 – 10.99.74.182 | 10.99.74.183 |
| 47 | 10.99.74.184/30 | 10.99.74.185 – 10.99.74.186 | 10.99.74.187 |
| 48 | 10.99.74.188/30 | 10.99.74.189 – 10.99.74.190 | 10.99.74.191 |
| 49 | 10.99.74.192/30 | 10.99.74.193 – 10.99.74.194 | 10.99.74.195 |
| 50 | 10.99.74.196/30 | 10.99.74.197 – 10.99.74.198 | 10.99.74.199 |
| 51 | 10.99.74.200/30 | 10.99.74.201 – 10.99.74.202 | 10.99.74.203 |
| 52 | 10.99.74.204/30 | 10.99.74.205 – 10.99.74.206 | 10.99.74.207 |
| 53 | 10.99.74.208/30 | 10.99.74.209 – 10.99.74.210 | 10.99.74.211 |
| 54 | 10.99.74.212/30 | 10.99.74.213 – 10.99.74.214 | 10.99.74.215 |
| 55 | 10.99.74.216/30 | 10.99.74.217 – 10.99.74.218 | 10.99.74.219 |
| 56 | 10.99.74.220/30 | 10.99.74.221 – 10.99.74.222 | 10.99.74.223 |
| 57 | 10.99.74.224/30 | 10.99.74.225 – 10.99.74.226 | 10.99.74.227 |
| 58 | 10.99.74.228/30 | 10.99.74.229 – 10.99.74.230 | 10.99.74.231 |
| 59 | 10.99.74.232/30 | 10.99.74.233 – 10.99.74.234 | 10.99.74.235 |
| 60 | 10.99.74.236/30 | 10.99.74.237 – 10.99.74.238 | 10.99.74.239 |
| 61 | 10.99.74.240/30 | 10.99.74.241 – 10.99.74.242 | 10.99.74.243 |
| 62 | 10.99.74.244/30 | 10.99.74.245 – 10.99.74.246 | 10.99.74.247 |
| 63 | 10.99.74.248/30 | 10.99.74.249 – 10.99.74.250 | 10.99.74.251 |
| 64 | 10.99.74.252/30 | 10.99.74.253 – 10.99.74.254 | 10.99.74.255 |
| 65 | 10.99.75.0/30 | 10.99.75.1 – 10.99.75.2 | 10.99.75.3 |
| 66 | 10.99.75.4/30 | 10.99.75.5 – 10.99.75.6 | 10.99.75.7 |
| 67 | 10.99.75.8/30 | 10.99.75.9 – 10.99.75.10 | 10.99.75.11 |
| 68 | 10.99.75.12/30 | 10.99.75.13 – 10.99.75.14 | 10.99.75.15 |
| 69 | 10.99.75.16/30 | 10.99.75.17 – 10.99.75.18 | 10.99.75.19 |
| 70 | 10.99.75.20/30 | 10.99.75.21 – 10.99.75.22 | 10.99.75.23 |
| 71 | 10.99.75.24/30 | 10.99.75.25 – 10.99.75.26 | 10.99.75.27 |
| 72 | 10.99.75.28/30 | 10.99.75.29 – 10.99.75.30 | 10.99.75.31 |
| 73 | 10.99.75.32/30 | 10.99.75.33 – 10.99.75.34 | 10.99.75.35 |
| 74 | 10.99.75.36/30 | 10.99.75.37 – 10.99.75.38 | 10.99.75.39 |
| 75 | 10.99.75.40/30 | 10.99.75.41 – 10.99.75.42 | 10.99.75.43 |
| 76 | 10.99.75.44/30 | 10.99.75.45 – 10.99.75.46 | 10.99.75.47 |
| 77 | 10.99.75.48/30 | 10.99.75.49 – 10.99.75.50 | 10.99.75.51 |
| 78 | 10.99.75.52/30 | 10.99.75.53 – 10.99.75.54 | 10.99.75.55 |
| 79 | 10.99.75.56/30 | 10.99.75.57 – 10.99.75.58 | 10.99.75.59 |
| 80 | 10.99.75.60/30 | 10.99.75.61 – 10.99.75.62 | 10.99.75.63 |
| 81 | 10.99.75.64/30 | 10.99.75.65 – 10.99.75.66 | 10.99.75.67 |
| 82 | 10.99.75.68/30 | 10.99.75.69 – 10.99.75.70 | 10.99.75.71 |
| 83 | 10.99.75.72/30 | 10.99.75.73 – 10.99.75.74 | 10.99.75.75 |
| 84 | 10.99.75.76/30 | 10.99.75.77 – 10.99.75.78 | 10.99.75.79 |
| 85 | 10.99.75.80/30 | 10.99.75.81 – 10.99.75.82 | 10.99.75.83 |
| 86 | 10.99.75.84/30 | 10.99.75.85 – 10.99.75.86 | 10.99.75.87 |
| 87 | 10.99.75.88/30 | 10.99.75.89 – 10.99.75.90 | 10.99.75.91 |
| 88 | 10.99.75.92/30 | 10.99.75.93 – 10.99.75.94 | 10.99.75.95 |
| 89 | 10.99.75.96/30 | 10.99.75.97 – 10.99.75.98 | 10.99.75.99 |
| 90 | 10.99.75.100/30 | 10.99.75.101 – 10.99.75.102 | 10.99.75.103 |
| 91 | 10.99.75.104/30 | 10.99.75.105 – 10.99.75.106 | 10.99.75.107 |
| 92 | 10.99.75.108/30 | 10.99.75.109 – 10.99.75.110 | 10.99.75.111 |
| 93 | 10.99.75.112/30 | 10.99.75.113 – 10.99.75.114 | 10.99.75.115 |
| 94 | 10.99.75.116/30 | 10.99.75.117 – 10.99.75.118 | 10.99.75.119 |
| 95 | 10.99.75.120/30 | 10.99.75.121 – 10.99.75.122 | 10.99.75.123 |
| 96 | 10.99.75.124/30 | 10.99.75.125 – 10.99.75.126 | 10.99.75.127 |
| 97 | 10.99.75.128/30 | 10.99.75.129 – 10.99.75.130 | 10.99.75.131 |
| 98 | 10.99.75.132/30 | 10.99.75.133 – 10.99.75.134 | 10.99.75.135 |
| 99 | 10.99.75.136/30 | 10.99.75.137 – 10.99.75.138 | 10.99.75.139 |
| 100 | 10.99.75.140/30 | 10.99.75.141 – 10.99.75.142 | 10.99.75.143 |
| 101 | 10.99.75.144/30 | 10.99.75.145 – 10.99.75.146 | 10.99.75.147 |
| 102 | 10.99.75.148/30 | 10.99.75.149 – 10.99.75.150 | 10.99.75.151 |
| 103 | 10.99.75.152/30 | 10.99.75.153 – 10.99.75.154 | 10.99.75.155 |
| 104 | 10.99.75.156/30 | 10.99.75.157 – 10.99.75.158 | 10.99.75.159 |
| 105 | 10.99.75.160/30 | 10.99.75.161 – 10.99.75.162 | 10.99.75.163 |
| 106 | 10.99.75.164/30 | 10.99.75.165 – 10.99.75.166 | 10.99.75.167 |
| 107 | 10.99.75.168/30 | 10.99.75.169 – 10.99.75.170 | 10.99.75.171 |
| 108 | 10.99.75.172/30 | 10.99.75.173 – 10.99.75.174 | 10.99.75.175 |
| 109 | 10.99.75.176/30 | 10.99.75.177 – 10.99.75.178 | 10.99.75.179 |
| 110 | 10.99.75.180/30 | 10.99.75.181 – 10.99.75.182 | 10.99.75.183 |
| 111 | 10.99.75.184/30 | 10.99.75.185 – 10.99.75.186 | 10.99.75.187 |
| 112 | 10.99.75.188/30 | 10.99.75.189 – 10.99.75.190 | 10.99.75.191 |
| 113 | 10.99.75.192/30 | 10.99.75.193 – 10.99.75.194 | 10.99.75.195 |
| 114 | 10.99.75.196/30 | 10.99.75.197 – 10.99.75.198 | 10.99.75.199 |
| 115 | 10.99.75.200/30 | 10.99.75.201 – 10.99.75.202 | 10.99.75.203 |
| 116 | 10.99.75.204/30 | 10.99.75.205 – 10.99.75.206 | 10.99.75.207 |
| 117 | 10.99.75.208/30 | 10.99.75.209 – 10.99.75.210 | 10.99.75.211 |
| 118 | 10.99.75.212/30 | 10.99.75.213 – 10.99.75.214 | 10.99.75.215 |
| 119 | 10.99.75.216/30 | 10.99.75.217 – 10.99.75.218 | 10.99.75.219 |
| 120 | 10.99.75.220/30 | 10.99.75.221 – 10.99.75.222 | 10.99.75.223 |
| 121 | 10.99.75.224/30 | 10.99.75.225 – 10.99.75.226 | 10.99.75.227 |
| 122 | 10.99.75.228/30 | 10.99.75.229 – 10.99.75.230 | 10.99.75.231 |
| 123 | 10.99.75.232/30 | 10.99.75.233 – 10.99.75.234 | 10.99.75.235 |
| 124 | 10.99.75.236/30 | 10.99.75.237 – 10.99.75.238 | 10.99.75.239 |
| 125 | 10.99.75.240/30 | 10.99.75.241 – 10.99.75.242 | 10.99.75.243 |
| 126 | 10.99.75.244/30 | 10.99.75.245 – 10.99.75.246 | 10.99.75.247 |
| 127 | 10.99.75.248/30 | 10.99.75.249 – 10.99.75.250 | 10.99.75.251 |
| 128 | 10.99.75.252/30 | 10.99.75.253 – 10.99.75.254 | 10.99.75.255 |
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.