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)10.87.72.0/22
network10.87.72.0/22
broadcast10.87.75.255
first host10.87.72.1
last host10.87.75.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.87.72.0/22
address00001010.01010111.01001000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.01010111.01001000.00000000
broadcast00001010.01010111.01001011.11111111
green = network part, grey = host part
hex0x0a574800
decimal173492224
reverse dns0.72.87.10.in-addr.arpa
ipv4-mapped::ffff:a57:4800
/22 split into /29 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.87.72.0/29 | 10.87.72.1 – 10.87.72.6 | 10.87.72.7 |
| 2 | 10.87.72.8/29 | 10.87.72.9 – 10.87.72.14 | 10.87.72.15 |
| 3 | 10.87.72.16/29 | 10.87.72.17 – 10.87.72.22 | 10.87.72.23 |
| 4 | 10.87.72.24/29 | 10.87.72.25 – 10.87.72.30 | 10.87.72.31 |
| 5 | 10.87.72.32/29 | 10.87.72.33 – 10.87.72.38 | 10.87.72.39 |
| 6 | 10.87.72.40/29 | 10.87.72.41 – 10.87.72.46 | 10.87.72.47 |
| 7 | 10.87.72.48/29 | 10.87.72.49 – 10.87.72.54 | 10.87.72.55 |
| 8 | 10.87.72.56/29 | 10.87.72.57 – 10.87.72.62 | 10.87.72.63 |
| 9 | 10.87.72.64/29 | 10.87.72.65 – 10.87.72.70 | 10.87.72.71 |
| 10 | 10.87.72.72/29 | 10.87.72.73 – 10.87.72.78 | 10.87.72.79 |
| 11 | 10.87.72.80/29 | 10.87.72.81 – 10.87.72.86 | 10.87.72.87 |
| 12 | 10.87.72.88/29 | 10.87.72.89 – 10.87.72.94 | 10.87.72.95 |
| 13 | 10.87.72.96/29 | 10.87.72.97 – 10.87.72.102 | 10.87.72.103 |
| 14 | 10.87.72.104/29 | 10.87.72.105 – 10.87.72.110 | 10.87.72.111 |
| 15 | 10.87.72.112/29 | 10.87.72.113 – 10.87.72.118 | 10.87.72.119 |
| 16 | 10.87.72.120/29 | 10.87.72.121 – 10.87.72.126 | 10.87.72.127 |
| 17 | 10.87.72.128/29 | 10.87.72.129 – 10.87.72.134 | 10.87.72.135 |
| 18 | 10.87.72.136/29 | 10.87.72.137 – 10.87.72.142 | 10.87.72.143 |
| 19 | 10.87.72.144/29 | 10.87.72.145 – 10.87.72.150 | 10.87.72.151 |
| 20 | 10.87.72.152/29 | 10.87.72.153 – 10.87.72.158 | 10.87.72.159 |
| 21 | 10.87.72.160/29 | 10.87.72.161 – 10.87.72.166 | 10.87.72.167 |
| 22 | 10.87.72.168/29 | 10.87.72.169 – 10.87.72.174 | 10.87.72.175 |
| 23 | 10.87.72.176/29 | 10.87.72.177 – 10.87.72.182 | 10.87.72.183 |
| 24 | 10.87.72.184/29 | 10.87.72.185 – 10.87.72.190 | 10.87.72.191 |
| 25 | 10.87.72.192/29 | 10.87.72.193 – 10.87.72.198 | 10.87.72.199 |
| 26 | 10.87.72.200/29 | 10.87.72.201 – 10.87.72.206 | 10.87.72.207 |
| 27 | 10.87.72.208/29 | 10.87.72.209 – 10.87.72.214 | 10.87.72.215 |
| 28 | 10.87.72.216/29 | 10.87.72.217 – 10.87.72.222 | 10.87.72.223 |
| 29 | 10.87.72.224/29 | 10.87.72.225 – 10.87.72.230 | 10.87.72.231 |
| 30 | 10.87.72.232/29 | 10.87.72.233 – 10.87.72.238 | 10.87.72.239 |
| 31 | 10.87.72.240/29 | 10.87.72.241 – 10.87.72.246 | 10.87.72.247 |
| 32 | 10.87.72.248/29 | 10.87.72.249 – 10.87.72.254 | 10.87.72.255 |
| 33 | 10.87.73.0/29 | 10.87.73.1 – 10.87.73.6 | 10.87.73.7 |
| 34 | 10.87.73.8/29 | 10.87.73.9 – 10.87.73.14 | 10.87.73.15 |
| 35 | 10.87.73.16/29 | 10.87.73.17 – 10.87.73.22 | 10.87.73.23 |
| 36 | 10.87.73.24/29 | 10.87.73.25 – 10.87.73.30 | 10.87.73.31 |
| 37 | 10.87.73.32/29 | 10.87.73.33 – 10.87.73.38 | 10.87.73.39 |
| 38 | 10.87.73.40/29 | 10.87.73.41 – 10.87.73.46 | 10.87.73.47 |
| 39 | 10.87.73.48/29 | 10.87.73.49 – 10.87.73.54 | 10.87.73.55 |
| 40 | 10.87.73.56/29 | 10.87.73.57 – 10.87.73.62 | 10.87.73.63 |
| 41 | 10.87.73.64/29 | 10.87.73.65 – 10.87.73.70 | 10.87.73.71 |
| 42 | 10.87.73.72/29 | 10.87.73.73 – 10.87.73.78 | 10.87.73.79 |
| 43 | 10.87.73.80/29 | 10.87.73.81 – 10.87.73.86 | 10.87.73.87 |
| 44 | 10.87.73.88/29 | 10.87.73.89 – 10.87.73.94 | 10.87.73.95 |
| 45 | 10.87.73.96/29 | 10.87.73.97 – 10.87.73.102 | 10.87.73.103 |
| 46 | 10.87.73.104/29 | 10.87.73.105 – 10.87.73.110 | 10.87.73.111 |
| 47 | 10.87.73.112/29 | 10.87.73.113 – 10.87.73.118 | 10.87.73.119 |
| 48 | 10.87.73.120/29 | 10.87.73.121 – 10.87.73.126 | 10.87.73.127 |
| 49 | 10.87.73.128/29 | 10.87.73.129 – 10.87.73.134 | 10.87.73.135 |
| 50 | 10.87.73.136/29 | 10.87.73.137 – 10.87.73.142 | 10.87.73.143 |
| 51 | 10.87.73.144/29 | 10.87.73.145 – 10.87.73.150 | 10.87.73.151 |
| 52 | 10.87.73.152/29 | 10.87.73.153 – 10.87.73.158 | 10.87.73.159 |
| 53 | 10.87.73.160/29 | 10.87.73.161 – 10.87.73.166 | 10.87.73.167 |
| 54 | 10.87.73.168/29 | 10.87.73.169 – 10.87.73.174 | 10.87.73.175 |
| 55 | 10.87.73.176/29 | 10.87.73.177 – 10.87.73.182 | 10.87.73.183 |
| 56 | 10.87.73.184/29 | 10.87.73.185 – 10.87.73.190 | 10.87.73.191 |
| 57 | 10.87.73.192/29 | 10.87.73.193 – 10.87.73.198 | 10.87.73.199 |
| 58 | 10.87.73.200/29 | 10.87.73.201 – 10.87.73.206 | 10.87.73.207 |
| 59 | 10.87.73.208/29 | 10.87.73.209 – 10.87.73.214 | 10.87.73.215 |
| 60 | 10.87.73.216/29 | 10.87.73.217 – 10.87.73.222 | 10.87.73.223 |
| 61 | 10.87.73.224/29 | 10.87.73.225 – 10.87.73.230 | 10.87.73.231 |
| 62 | 10.87.73.232/29 | 10.87.73.233 – 10.87.73.238 | 10.87.73.239 |
| 63 | 10.87.73.240/29 | 10.87.73.241 – 10.87.73.246 | 10.87.73.247 |
| 64 | 10.87.73.248/29 | 10.87.73.249 – 10.87.73.254 | 10.87.73.255 |
| 65 | 10.87.74.0/29 | 10.87.74.1 – 10.87.74.6 | 10.87.74.7 |
| 66 | 10.87.74.8/29 | 10.87.74.9 – 10.87.74.14 | 10.87.74.15 |
| 67 | 10.87.74.16/29 | 10.87.74.17 – 10.87.74.22 | 10.87.74.23 |
| 68 | 10.87.74.24/29 | 10.87.74.25 – 10.87.74.30 | 10.87.74.31 |
| 69 | 10.87.74.32/29 | 10.87.74.33 – 10.87.74.38 | 10.87.74.39 |
| 70 | 10.87.74.40/29 | 10.87.74.41 – 10.87.74.46 | 10.87.74.47 |
| 71 | 10.87.74.48/29 | 10.87.74.49 – 10.87.74.54 | 10.87.74.55 |
| 72 | 10.87.74.56/29 | 10.87.74.57 – 10.87.74.62 | 10.87.74.63 |
| 73 | 10.87.74.64/29 | 10.87.74.65 – 10.87.74.70 | 10.87.74.71 |
| 74 | 10.87.74.72/29 | 10.87.74.73 – 10.87.74.78 | 10.87.74.79 |
| 75 | 10.87.74.80/29 | 10.87.74.81 – 10.87.74.86 | 10.87.74.87 |
| 76 | 10.87.74.88/29 | 10.87.74.89 – 10.87.74.94 | 10.87.74.95 |
| 77 | 10.87.74.96/29 | 10.87.74.97 – 10.87.74.102 | 10.87.74.103 |
| 78 | 10.87.74.104/29 | 10.87.74.105 – 10.87.74.110 | 10.87.74.111 |
| 79 | 10.87.74.112/29 | 10.87.74.113 – 10.87.74.118 | 10.87.74.119 |
| 80 | 10.87.74.120/29 | 10.87.74.121 – 10.87.74.126 | 10.87.74.127 |
| 81 | 10.87.74.128/29 | 10.87.74.129 – 10.87.74.134 | 10.87.74.135 |
| 82 | 10.87.74.136/29 | 10.87.74.137 – 10.87.74.142 | 10.87.74.143 |
| 83 | 10.87.74.144/29 | 10.87.74.145 – 10.87.74.150 | 10.87.74.151 |
| 84 | 10.87.74.152/29 | 10.87.74.153 – 10.87.74.158 | 10.87.74.159 |
| 85 | 10.87.74.160/29 | 10.87.74.161 – 10.87.74.166 | 10.87.74.167 |
| 86 | 10.87.74.168/29 | 10.87.74.169 – 10.87.74.174 | 10.87.74.175 |
| 87 | 10.87.74.176/29 | 10.87.74.177 – 10.87.74.182 | 10.87.74.183 |
| 88 | 10.87.74.184/29 | 10.87.74.185 – 10.87.74.190 | 10.87.74.191 |
| 89 | 10.87.74.192/29 | 10.87.74.193 – 10.87.74.198 | 10.87.74.199 |
| 90 | 10.87.74.200/29 | 10.87.74.201 – 10.87.74.206 | 10.87.74.207 |
| 91 | 10.87.74.208/29 | 10.87.74.209 – 10.87.74.214 | 10.87.74.215 |
| 92 | 10.87.74.216/29 | 10.87.74.217 – 10.87.74.222 | 10.87.74.223 |
| 93 | 10.87.74.224/29 | 10.87.74.225 – 10.87.74.230 | 10.87.74.231 |
| 94 | 10.87.74.232/29 | 10.87.74.233 – 10.87.74.238 | 10.87.74.239 |
| 95 | 10.87.74.240/29 | 10.87.74.241 – 10.87.74.246 | 10.87.74.247 |
| 96 | 10.87.74.248/29 | 10.87.74.249 – 10.87.74.254 | 10.87.74.255 |
| 97 | 10.87.75.0/29 | 10.87.75.1 – 10.87.75.6 | 10.87.75.7 |
| 98 | 10.87.75.8/29 | 10.87.75.9 – 10.87.75.14 | 10.87.75.15 |
| 99 | 10.87.75.16/29 | 10.87.75.17 – 10.87.75.22 | 10.87.75.23 |
| 100 | 10.87.75.24/29 | 10.87.75.25 – 10.87.75.30 | 10.87.75.31 |
| 101 | 10.87.75.32/29 | 10.87.75.33 – 10.87.75.38 | 10.87.75.39 |
| 102 | 10.87.75.40/29 | 10.87.75.41 – 10.87.75.46 | 10.87.75.47 |
| 103 | 10.87.75.48/29 | 10.87.75.49 – 10.87.75.54 | 10.87.75.55 |
| 104 | 10.87.75.56/29 | 10.87.75.57 – 10.87.75.62 | 10.87.75.63 |
| 105 | 10.87.75.64/29 | 10.87.75.65 – 10.87.75.70 | 10.87.75.71 |
| 106 | 10.87.75.72/29 | 10.87.75.73 – 10.87.75.78 | 10.87.75.79 |
| 107 | 10.87.75.80/29 | 10.87.75.81 – 10.87.75.86 | 10.87.75.87 |
| 108 | 10.87.75.88/29 | 10.87.75.89 – 10.87.75.94 | 10.87.75.95 |
| 109 | 10.87.75.96/29 | 10.87.75.97 – 10.87.75.102 | 10.87.75.103 |
| 110 | 10.87.75.104/29 | 10.87.75.105 – 10.87.75.110 | 10.87.75.111 |
| 111 | 10.87.75.112/29 | 10.87.75.113 – 10.87.75.118 | 10.87.75.119 |
| 112 | 10.87.75.120/29 | 10.87.75.121 – 10.87.75.126 | 10.87.75.127 |
| 113 | 10.87.75.128/29 | 10.87.75.129 – 10.87.75.134 | 10.87.75.135 |
| 114 | 10.87.75.136/29 | 10.87.75.137 – 10.87.75.142 | 10.87.75.143 |
| 115 | 10.87.75.144/29 | 10.87.75.145 – 10.87.75.150 | 10.87.75.151 |
| 116 | 10.87.75.152/29 | 10.87.75.153 – 10.87.75.158 | 10.87.75.159 |
| 117 | 10.87.75.160/29 | 10.87.75.161 – 10.87.75.166 | 10.87.75.167 |
| 118 | 10.87.75.168/29 | 10.87.75.169 – 10.87.75.174 | 10.87.75.175 |
| 119 | 10.87.75.176/29 | 10.87.75.177 – 10.87.75.182 | 10.87.75.183 |
| 120 | 10.87.75.184/29 | 10.87.75.185 – 10.87.75.190 | 10.87.75.191 |
| 121 | 10.87.75.192/29 | 10.87.75.193 – 10.87.75.198 | 10.87.75.199 |
| 122 | 10.87.75.200/29 | 10.87.75.201 – 10.87.75.206 | 10.87.75.207 |
| 123 | 10.87.75.208/29 | 10.87.75.209 – 10.87.75.214 | 10.87.75.215 |
| 124 | 10.87.75.216/29 | 10.87.75.217 – 10.87.75.222 | 10.87.75.223 |
| 125 | 10.87.75.224/29 | 10.87.75.225 – 10.87.75.230 | 10.87.75.231 |
| 126 | 10.87.75.232/29 | 10.87.75.233 – 10.87.75.238 | 10.87.75.239 |
| 127 | 10.87.75.240/29 | 10.87.75.241 – 10.87.75.246 | 10.87.75.247 |
| 128 | 10.87.75.248/29 | 10.87.75.249 – 10.87.75.254 | 10.87.75.255 |
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 /22 |
|---|---|---|---|---|
| /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 | 1 |
| /23 | 255.255.254.0 | 512 | 510 | 2 split → |
| /24 | 255.255.255.0 | 256 | 254 | 4 split → |
| /25 | 255.255.255.128 | 128 | 126 | 8 split → |
| /26 | 255.255.255.192 | 64 | 62 | 16 split → |
| /27 | 255.255.255.224 | 32 | 30 | 32 split → |
| /28 | 255.255.255.240 | 16 | 14 | 64 split → |
| /29 | 255.255.255.248 | 8 | 6 | 128 split → |
| /30 | 255.255.255.252 | 4 | 2 | 256 split → |
| /31 | 255.255.255.254 | 2 | 2 | 512 split → |
| /32 | 255.255.255.255 | 1 | 1 | 1,024 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.