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)10.149.187.0/24
network10.149.187.0/24
broadcast10.149.187.255
first host10.149.187.1
last host10.149.187.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.149.187.0/24
address00001010.10010101.10111011.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.10010101.10111011.00000000
broadcast00001010.10010101.10111011.11111111
green = network part, grey = host part
hex0x0a95bb00
decimal177584896
reverse dns0.187.149.10.in-addr.arpa
ipv4-mapped::ffff:a95:bb00
/24 split into /30 · 64 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.149.187.0/30 | 10.149.187.1 – 10.149.187.2 | 10.149.187.3 |
| 2 | 10.149.187.4/30 | 10.149.187.5 – 10.149.187.6 | 10.149.187.7 |
| 3 | 10.149.187.8/30 | 10.149.187.9 – 10.149.187.10 | 10.149.187.11 |
| 4 | 10.149.187.12/30 | 10.149.187.13 – 10.149.187.14 | 10.149.187.15 |
| 5 | 10.149.187.16/30 | 10.149.187.17 – 10.149.187.18 | 10.149.187.19 |
| 6 | 10.149.187.20/30 | 10.149.187.21 – 10.149.187.22 | 10.149.187.23 |
| 7 | 10.149.187.24/30 | 10.149.187.25 – 10.149.187.26 | 10.149.187.27 |
| 8 | 10.149.187.28/30 | 10.149.187.29 – 10.149.187.30 | 10.149.187.31 |
| 9 | 10.149.187.32/30 | 10.149.187.33 – 10.149.187.34 | 10.149.187.35 |
| 10 | 10.149.187.36/30 | 10.149.187.37 – 10.149.187.38 | 10.149.187.39 |
| 11 | 10.149.187.40/30 | 10.149.187.41 – 10.149.187.42 | 10.149.187.43 |
| 12 | 10.149.187.44/30 | 10.149.187.45 – 10.149.187.46 | 10.149.187.47 |
| 13 | 10.149.187.48/30 | 10.149.187.49 – 10.149.187.50 | 10.149.187.51 |
| 14 | 10.149.187.52/30 | 10.149.187.53 – 10.149.187.54 | 10.149.187.55 |
| 15 | 10.149.187.56/30 | 10.149.187.57 – 10.149.187.58 | 10.149.187.59 |
| 16 | 10.149.187.60/30 | 10.149.187.61 – 10.149.187.62 | 10.149.187.63 |
| 17 | 10.149.187.64/30 | 10.149.187.65 – 10.149.187.66 | 10.149.187.67 |
| 18 | 10.149.187.68/30 | 10.149.187.69 – 10.149.187.70 | 10.149.187.71 |
| 19 | 10.149.187.72/30 | 10.149.187.73 – 10.149.187.74 | 10.149.187.75 |
| 20 | 10.149.187.76/30 | 10.149.187.77 – 10.149.187.78 | 10.149.187.79 |
| 21 | 10.149.187.80/30 | 10.149.187.81 – 10.149.187.82 | 10.149.187.83 |
| 22 | 10.149.187.84/30 | 10.149.187.85 – 10.149.187.86 | 10.149.187.87 |
| 23 | 10.149.187.88/30 | 10.149.187.89 – 10.149.187.90 | 10.149.187.91 |
| 24 | 10.149.187.92/30 | 10.149.187.93 – 10.149.187.94 | 10.149.187.95 |
| 25 | 10.149.187.96/30 | 10.149.187.97 – 10.149.187.98 | 10.149.187.99 |
| 26 | 10.149.187.100/30 | 10.149.187.101 – 10.149.187.102 | 10.149.187.103 |
| 27 | 10.149.187.104/30 | 10.149.187.105 – 10.149.187.106 | 10.149.187.107 |
| 28 | 10.149.187.108/30 | 10.149.187.109 – 10.149.187.110 | 10.149.187.111 |
| 29 | 10.149.187.112/30 | 10.149.187.113 – 10.149.187.114 | 10.149.187.115 |
| 30 | 10.149.187.116/30 | 10.149.187.117 – 10.149.187.118 | 10.149.187.119 |
| 31 | 10.149.187.120/30 | 10.149.187.121 – 10.149.187.122 | 10.149.187.123 |
| 32 | 10.149.187.124/30 | 10.149.187.125 – 10.149.187.126 | 10.149.187.127 |
| 33 | 10.149.187.128/30 | 10.149.187.129 – 10.149.187.130 | 10.149.187.131 |
| 34 | 10.149.187.132/30 | 10.149.187.133 – 10.149.187.134 | 10.149.187.135 |
| 35 | 10.149.187.136/30 | 10.149.187.137 – 10.149.187.138 | 10.149.187.139 |
| 36 | 10.149.187.140/30 | 10.149.187.141 – 10.149.187.142 | 10.149.187.143 |
| 37 | 10.149.187.144/30 | 10.149.187.145 – 10.149.187.146 | 10.149.187.147 |
| 38 | 10.149.187.148/30 | 10.149.187.149 – 10.149.187.150 | 10.149.187.151 |
| 39 | 10.149.187.152/30 | 10.149.187.153 – 10.149.187.154 | 10.149.187.155 |
| 40 | 10.149.187.156/30 | 10.149.187.157 – 10.149.187.158 | 10.149.187.159 |
| 41 | 10.149.187.160/30 | 10.149.187.161 – 10.149.187.162 | 10.149.187.163 |
| 42 | 10.149.187.164/30 | 10.149.187.165 – 10.149.187.166 | 10.149.187.167 |
| 43 | 10.149.187.168/30 | 10.149.187.169 – 10.149.187.170 | 10.149.187.171 |
| 44 | 10.149.187.172/30 | 10.149.187.173 – 10.149.187.174 | 10.149.187.175 |
| 45 | 10.149.187.176/30 | 10.149.187.177 – 10.149.187.178 | 10.149.187.179 |
| 46 | 10.149.187.180/30 | 10.149.187.181 – 10.149.187.182 | 10.149.187.183 |
| 47 | 10.149.187.184/30 | 10.149.187.185 – 10.149.187.186 | 10.149.187.187 |
| 48 | 10.149.187.188/30 | 10.149.187.189 – 10.149.187.190 | 10.149.187.191 |
| 49 | 10.149.187.192/30 | 10.149.187.193 – 10.149.187.194 | 10.149.187.195 |
| 50 | 10.149.187.196/30 | 10.149.187.197 – 10.149.187.198 | 10.149.187.199 |
| 51 | 10.149.187.200/30 | 10.149.187.201 – 10.149.187.202 | 10.149.187.203 |
| 52 | 10.149.187.204/30 | 10.149.187.205 – 10.149.187.206 | 10.149.187.207 |
| 53 | 10.149.187.208/30 | 10.149.187.209 – 10.149.187.210 | 10.149.187.211 |
| 54 | 10.149.187.212/30 | 10.149.187.213 – 10.149.187.214 | 10.149.187.215 |
| 55 | 10.149.187.216/30 | 10.149.187.217 – 10.149.187.218 | 10.149.187.219 |
| 56 | 10.149.187.220/30 | 10.149.187.221 – 10.149.187.222 | 10.149.187.223 |
| 57 | 10.149.187.224/30 | 10.149.187.225 – 10.149.187.226 | 10.149.187.227 |
| 58 | 10.149.187.228/30 | 10.149.187.229 – 10.149.187.230 | 10.149.187.231 |
| 59 | 10.149.187.232/30 | 10.149.187.233 – 10.149.187.234 | 10.149.187.235 |
| 60 | 10.149.187.236/30 | 10.149.187.237 – 10.149.187.238 | 10.149.187.239 |
| 61 | 10.149.187.240/30 | 10.149.187.241 – 10.149.187.242 | 10.149.187.243 |
| 62 | 10.149.187.244/30 | 10.149.187.245 – 10.149.187.246 | 10.149.187.247 |
| 63 | 10.149.187.248/30 | 10.149.187.249 – 10.149.187.250 | 10.149.187.251 |
| 64 | 10.149.187.252/30 | 10.149.187.253 – 10.149.187.254 | 10.149.187.255 |
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 /24 |
|---|---|---|---|---|
| /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 | - |
| /24 | 255.255.255.0 | 256 | 254 | 1 |
| /25 | 255.255.255.128 | 128 | 126 | 2 split → |
| /26 | 255.255.255.192 | 64 | 62 | 4 split → |
| /27 | 255.255.255.224 | 32 | 30 | 8 split → |
| /28 | 255.255.255.240 | 16 | 14 | 16 split → |
| /29 | 255.255.255.248 | 8 | 6 | 32 split → |
| /30 | 255.255.255.252 | 4 | 2 | 64 split → |
| /31 | 255.255.255.254 | 2 | 2 | 128 split → |
| /32 | 255.255.255.255 | 1 | 1 | 256 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.