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)10.23.0.0/19
network10.23.0.0/19
broadcast10.23.31.255
first host10.23.0.1
last host10.23.31.254
subnet mask255.255.224.0
wildcard0.0.31.255
addresses8,192
usable hosts8,190
classA
ipcalc 10.23.0.0/19
address00001010.00010111.00000000.00000000
subnet mask11111111.11111111.11100000.00000000
network00001010.00010111.00000000.00000000
broadcast00001010.00010111.00011111.11111111
green = network part, grey = host part
hex0x0a170000
decimal169279488
reverse dns0.0.23.10.in-addr.arpa
ipv4-mapped::ffff:a17:0
/19 split into /26 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.23.0.0/26 | 10.23.0.1 – 10.23.0.62 | 10.23.0.63 |
| 2 | 10.23.0.64/26 | 10.23.0.65 – 10.23.0.126 | 10.23.0.127 |
| 3 | 10.23.0.128/26 | 10.23.0.129 – 10.23.0.190 | 10.23.0.191 |
| 4 | 10.23.0.192/26 | 10.23.0.193 – 10.23.0.254 | 10.23.0.255 |
| 5 | 10.23.1.0/26 | 10.23.1.1 – 10.23.1.62 | 10.23.1.63 |
| 6 | 10.23.1.64/26 | 10.23.1.65 – 10.23.1.126 | 10.23.1.127 |
| 7 | 10.23.1.128/26 | 10.23.1.129 – 10.23.1.190 | 10.23.1.191 |
| 8 | 10.23.1.192/26 | 10.23.1.193 – 10.23.1.254 | 10.23.1.255 |
| 9 | 10.23.2.0/26 | 10.23.2.1 – 10.23.2.62 | 10.23.2.63 |
| 10 | 10.23.2.64/26 | 10.23.2.65 – 10.23.2.126 | 10.23.2.127 |
| 11 | 10.23.2.128/26 | 10.23.2.129 – 10.23.2.190 | 10.23.2.191 |
| 12 | 10.23.2.192/26 | 10.23.2.193 – 10.23.2.254 | 10.23.2.255 |
| 13 | 10.23.3.0/26 | 10.23.3.1 – 10.23.3.62 | 10.23.3.63 |
| 14 | 10.23.3.64/26 | 10.23.3.65 – 10.23.3.126 | 10.23.3.127 |
| 15 | 10.23.3.128/26 | 10.23.3.129 – 10.23.3.190 | 10.23.3.191 |
| 16 | 10.23.3.192/26 | 10.23.3.193 – 10.23.3.254 | 10.23.3.255 |
| 17 | 10.23.4.0/26 | 10.23.4.1 – 10.23.4.62 | 10.23.4.63 |
| 18 | 10.23.4.64/26 | 10.23.4.65 – 10.23.4.126 | 10.23.4.127 |
| 19 | 10.23.4.128/26 | 10.23.4.129 – 10.23.4.190 | 10.23.4.191 |
| 20 | 10.23.4.192/26 | 10.23.4.193 – 10.23.4.254 | 10.23.4.255 |
| 21 | 10.23.5.0/26 | 10.23.5.1 – 10.23.5.62 | 10.23.5.63 |
| 22 | 10.23.5.64/26 | 10.23.5.65 – 10.23.5.126 | 10.23.5.127 |
| 23 | 10.23.5.128/26 | 10.23.5.129 – 10.23.5.190 | 10.23.5.191 |
| 24 | 10.23.5.192/26 | 10.23.5.193 – 10.23.5.254 | 10.23.5.255 |
| 25 | 10.23.6.0/26 | 10.23.6.1 – 10.23.6.62 | 10.23.6.63 |
| 26 | 10.23.6.64/26 | 10.23.6.65 – 10.23.6.126 | 10.23.6.127 |
| 27 | 10.23.6.128/26 | 10.23.6.129 – 10.23.6.190 | 10.23.6.191 |
| 28 | 10.23.6.192/26 | 10.23.6.193 – 10.23.6.254 | 10.23.6.255 |
| 29 | 10.23.7.0/26 | 10.23.7.1 – 10.23.7.62 | 10.23.7.63 |
| 30 | 10.23.7.64/26 | 10.23.7.65 – 10.23.7.126 | 10.23.7.127 |
| 31 | 10.23.7.128/26 | 10.23.7.129 – 10.23.7.190 | 10.23.7.191 |
| 32 | 10.23.7.192/26 | 10.23.7.193 – 10.23.7.254 | 10.23.7.255 |
| 33 | 10.23.8.0/26 | 10.23.8.1 – 10.23.8.62 | 10.23.8.63 |
| 34 | 10.23.8.64/26 | 10.23.8.65 – 10.23.8.126 | 10.23.8.127 |
| 35 | 10.23.8.128/26 | 10.23.8.129 – 10.23.8.190 | 10.23.8.191 |
| 36 | 10.23.8.192/26 | 10.23.8.193 – 10.23.8.254 | 10.23.8.255 |
| 37 | 10.23.9.0/26 | 10.23.9.1 – 10.23.9.62 | 10.23.9.63 |
| 38 | 10.23.9.64/26 | 10.23.9.65 – 10.23.9.126 | 10.23.9.127 |
| 39 | 10.23.9.128/26 | 10.23.9.129 – 10.23.9.190 | 10.23.9.191 |
| 40 | 10.23.9.192/26 | 10.23.9.193 – 10.23.9.254 | 10.23.9.255 |
| 41 | 10.23.10.0/26 | 10.23.10.1 – 10.23.10.62 | 10.23.10.63 |
| 42 | 10.23.10.64/26 | 10.23.10.65 – 10.23.10.126 | 10.23.10.127 |
| 43 | 10.23.10.128/26 | 10.23.10.129 – 10.23.10.190 | 10.23.10.191 |
| 44 | 10.23.10.192/26 | 10.23.10.193 – 10.23.10.254 | 10.23.10.255 |
| 45 | 10.23.11.0/26 | 10.23.11.1 – 10.23.11.62 | 10.23.11.63 |
| 46 | 10.23.11.64/26 | 10.23.11.65 – 10.23.11.126 | 10.23.11.127 |
| 47 | 10.23.11.128/26 | 10.23.11.129 – 10.23.11.190 | 10.23.11.191 |
| 48 | 10.23.11.192/26 | 10.23.11.193 – 10.23.11.254 | 10.23.11.255 |
| 49 | 10.23.12.0/26 | 10.23.12.1 – 10.23.12.62 | 10.23.12.63 |
| 50 | 10.23.12.64/26 | 10.23.12.65 – 10.23.12.126 | 10.23.12.127 |
| 51 | 10.23.12.128/26 | 10.23.12.129 – 10.23.12.190 | 10.23.12.191 |
| 52 | 10.23.12.192/26 | 10.23.12.193 – 10.23.12.254 | 10.23.12.255 |
| 53 | 10.23.13.0/26 | 10.23.13.1 – 10.23.13.62 | 10.23.13.63 |
| 54 | 10.23.13.64/26 | 10.23.13.65 – 10.23.13.126 | 10.23.13.127 |
| 55 | 10.23.13.128/26 | 10.23.13.129 – 10.23.13.190 | 10.23.13.191 |
| 56 | 10.23.13.192/26 | 10.23.13.193 – 10.23.13.254 | 10.23.13.255 |
| 57 | 10.23.14.0/26 | 10.23.14.1 – 10.23.14.62 | 10.23.14.63 |
| 58 | 10.23.14.64/26 | 10.23.14.65 – 10.23.14.126 | 10.23.14.127 |
| 59 | 10.23.14.128/26 | 10.23.14.129 – 10.23.14.190 | 10.23.14.191 |
| 60 | 10.23.14.192/26 | 10.23.14.193 – 10.23.14.254 | 10.23.14.255 |
| 61 | 10.23.15.0/26 | 10.23.15.1 – 10.23.15.62 | 10.23.15.63 |
| 62 | 10.23.15.64/26 | 10.23.15.65 – 10.23.15.126 | 10.23.15.127 |
| 63 | 10.23.15.128/26 | 10.23.15.129 – 10.23.15.190 | 10.23.15.191 |
| 64 | 10.23.15.192/26 | 10.23.15.193 – 10.23.15.254 | 10.23.15.255 |
| 65 | 10.23.16.0/26 | 10.23.16.1 – 10.23.16.62 | 10.23.16.63 |
| 66 | 10.23.16.64/26 | 10.23.16.65 – 10.23.16.126 | 10.23.16.127 |
| 67 | 10.23.16.128/26 | 10.23.16.129 – 10.23.16.190 | 10.23.16.191 |
| 68 | 10.23.16.192/26 | 10.23.16.193 – 10.23.16.254 | 10.23.16.255 |
| 69 | 10.23.17.0/26 | 10.23.17.1 – 10.23.17.62 | 10.23.17.63 |
| 70 | 10.23.17.64/26 | 10.23.17.65 – 10.23.17.126 | 10.23.17.127 |
| 71 | 10.23.17.128/26 | 10.23.17.129 – 10.23.17.190 | 10.23.17.191 |
| 72 | 10.23.17.192/26 | 10.23.17.193 – 10.23.17.254 | 10.23.17.255 |
| 73 | 10.23.18.0/26 | 10.23.18.1 – 10.23.18.62 | 10.23.18.63 |
| 74 | 10.23.18.64/26 | 10.23.18.65 – 10.23.18.126 | 10.23.18.127 |
| 75 | 10.23.18.128/26 | 10.23.18.129 – 10.23.18.190 | 10.23.18.191 |
| 76 | 10.23.18.192/26 | 10.23.18.193 – 10.23.18.254 | 10.23.18.255 |
| 77 | 10.23.19.0/26 | 10.23.19.1 – 10.23.19.62 | 10.23.19.63 |
| 78 | 10.23.19.64/26 | 10.23.19.65 – 10.23.19.126 | 10.23.19.127 |
| 79 | 10.23.19.128/26 | 10.23.19.129 – 10.23.19.190 | 10.23.19.191 |
| 80 | 10.23.19.192/26 | 10.23.19.193 – 10.23.19.254 | 10.23.19.255 |
| 81 | 10.23.20.0/26 | 10.23.20.1 – 10.23.20.62 | 10.23.20.63 |
| 82 | 10.23.20.64/26 | 10.23.20.65 – 10.23.20.126 | 10.23.20.127 |
| 83 | 10.23.20.128/26 | 10.23.20.129 – 10.23.20.190 | 10.23.20.191 |
| 84 | 10.23.20.192/26 | 10.23.20.193 – 10.23.20.254 | 10.23.20.255 |
| 85 | 10.23.21.0/26 | 10.23.21.1 – 10.23.21.62 | 10.23.21.63 |
| 86 | 10.23.21.64/26 | 10.23.21.65 – 10.23.21.126 | 10.23.21.127 |
| 87 | 10.23.21.128/26 | 10.23.21.129 – 10.23.21.190 | 10.23.21.191 |
| 88 | 10.23.21.192/26 | 10.23.21.193 – 10.23.21.254 | 10.23.21.255 |
| 89 | 10.23.22.0/26 | 10.23.22.1 – 10.23.22.62 | 10.23.22.63 |
| 90 | 10.23.22.64/26 | 10.23.22.65 – 10.23.22.126 | 10.23.22.127 |
| 91 | 10.23.22.128/26 | 10.23.22.129 – 10.23.22.190 | 10.23.22.191 |
| 92 | 10.23.22.192/26 | 10.23.22.193 – 10.23.22.254 | 10.23.22.255 |
| 93 | 10.23.23.0/26 | 10.23.23.1 – 10.23.23.62 | 10.23.23.63 |
| 94 | 10.23.23.64/26 | 10.23.23.65 – 10.23.23.126 | 10.23.23.127 |
| 95 | 10.23.23.128/26 | 10.23.23.129 – 10.23.23.190 | 10.23.23.191 |
| 96 | 10.23.23.192/26 | 10.23.23.193 – 10.23.23.254 | 10.23.23.255 |
| 97 | 10.23.24.0/26 | 10.23.24.1 – 10.23.24.62 | 10.23.24.63 |
| 98 | 10.23.24.64/26 | 10.23.24.65 – 10.23.24.126 | 10.23.24.127 |
| 99 | 10.23.24.128/26 | 10.23.24.129 – 10.23.24.190 | 10.23.24.191 |
| 100 | 10.23.24.192/26 | 10.23.24.193 – 10.23.24.254 | 10.23.24.255 |
| 101 | 10.23.25.0/26 | 10.23.25.1 – 10.23.25.62 | 10.23.25.63 |
| 102 | 10.23.25.64/26 | 10.23.25.65 – 10.23.25.126 | 10.23.25.127 |
| 103 | 10.23.25.128/26 | 10.23.25.129 – 10.23.25.190 | 10.23.25.191 |
| 104 | 10.23.25.192/26 | 10.23.25.193 – 10.23.25.254 | 10.23.25.255 |
| 105 | 10.23.26.0/26 | 10.23.26.1 – 10.23.26.62 | 10.23.26.63 |
| 106 | 10.23.26.64/26 | 10.23.26.65 – 10.23.26.126 | 10.23.26.127 |
| 107 | 10.23.26.128/26 | 10.23.26.129 – 10.23.26.190 | 10.23.26.191 |
| 108 | 10.23.26.192/26 | 10.23.26.193 – 10.23.26.254 | 10.23.26.255 |
| 109 | 10.23.27.0/26 | 10.23.27.1 – 10.23.27.62 | 10.23.27.63 |
| 110 | 10.23.27.64/26 | 10.23.27.65 – 10.23.27.126 | 10.23.27.127 |
| 111 | 10.23.27.128/26 | 10.23.27.129 – 10.23.27.190 | 10.23.27.191 |
| 112 | 10.23.27.192/26 | 10.23.27.193 – 10.23.27.254 | 10.23.27.255 |
| 113 | 10.23.28.0/26 | 10.23.28.1 – 10.23.28.62 | 10.23.28.63 |
| 114 | 10.23.28.64/26 | 10.23.28.65 – 10.23.28.126 | 10.23.28.127 |
| 115 | 10.23.28.128/26 | 10.23.28.129 – 10.23.28.190 | 10.23.28.191 |
| 116 | 10.23.28.192/26 | 10.23.28.193 – 10.23.28.254 | 10.23.28.255 |
| 117 | 10.23.29.0/26 | 10.23.29.1 – 10.23.29.62 | 10.23.29.63 |
| 118 | 10.23.29.64/26 | 10.23.29.65 – 10.23.29.126 | 10.23.29.127 |
| 119 | 10.23.29.128/26 | 10.23.29.129 – 10.23.29.190 | 10.23.29.191 |
| 120 | 10.23.29.192/26 | 10.23.29.193 – 10.23.29.254 | 10.23.29.255 |
| 121 | 10.23.30.0/26 | 10.23.30.1 – 10.23.30.62 | 10.23.30.63 |
| 122 | 10.23.30.64/26 | 10.23.30.65 – 10.23.30.126 | 10.23.30.127 |
| 123 | 10.23.30.128/26 | 10.23.30.129 – 10.23.30.190 | 10.23.30.191 |
| 124 | 10.23.30.192/26 | 10.23.30.193 – 10.23.30.254 | 10.23.30.255 |
| 125 | 10.23.31.0/26 | 10.23.31.1 – 10.23.31.62 | 10.23.31.63 |
| 126 | 10.23.31.64/26 | 10.23.31.65 – 10.23.31.126 | 10.23.31.127 |
| 127 | 10.23.31.128/26 | 10.23.31.129 – 10.23.31.190 | 10.23.31.191 |
| 128 | 10.23.31.192/26 | 10.23.31.193 – 10.23.31.254 | 10.23.31.255 |
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 /19 |
|---|---|---|---|---|
| /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 | 1 |
| /20 | 255.255.240.0 | 4,096 | 4,094 | 2 split → |
| /21 | 255.255.248.0 | 2,048 | 2,046 | 4 split → |
| /22 | 255.255.252.0 | 1,024 | 1,022 | 8 split → |
| /23 | 255.255.254.0 | 512 | 510 | 16 split → |
| /24 | 255.255.255.0 | 256 | 254 | 32 split → |
| /25 | 255.255.255.128 | 128 | 126 | 64 split → |
| /26 | 255.255.255.192 | 64 | 62 | 128 split → |
| /27 | 255.255.255.224 | 32 | 30 | 256 split → |
| /28 | 255.255.255.240 | 16 | 14 | 512 split → |
| /29 | 255.255.255.248 | 8 | 6 | 1,024 split → |
| /30 | 255.255.255.252 | 4 | 2 | 2,048 split → |
| /31 | 255.255.255.254 | 2 | 2 | 4,096 split → |
| /32 | 255.255.255.255 | 1 | 1 | 8,192 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.