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)10.13.144.0/20
network10.13.144.0/20
broadcast10.13.159.255
first host10.13.144.1
last host10.13.159.254
subnet mask255.255.240.0
wildcard0.0.15.255
addresses4,096
usable hosts4,094
classA
ipcalc 10.13.144.0/20
address00001010.00001101.10010000.00000000
subnet mask11111111.11111111.11110000.00000000
network00001010.00001101.10010000.00000000
broadcast00001010.00001101.10011111.11111111
green = network part, grey = host part
hex0x0a0d9000
decimal168660992
reverse dns0.144.13.10.in-addr.arpa
ipv4-mapped::ffff:a0d:9000
/20 split into /27 · 128 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.13.144.0/27 | 10.13.144.1 – 10.13.144.30 | 10.13.144.31 |
| 2 | 10.13.144.32/27 | 10.13.144.33 – 10.13.144.62 | 10.13.144.63 |
| 3 | 10.13.144.64/27 | 10.13.144.65 – 10.13.144.94 | 10.13.144.95 |
| 4 | 10.13.144.96/27 | 10.13.144.97 – 10.13.144.126 | 10.13.144.127 |
| 5 | 10.13.144.128/27 | 10.13.144.129 – 10.13.144.158 | 10.13.144.159 |
| 6 | 10.13.144.160/27 | 10.13.144.161 – 10.13.144.190 | 10.13.144.191 |
| 7 | 10.13.144.192/27 | 10.13.144.193 – 10.13.144.222 | 10.13.144.223 |
| 8 | 10.13.144.224/27 | 10.13.144.225 – 10.13.144.254 | 10.13.144.255 |
| 9 | 10.13.145.0/27 | 10.13.145.1 – 10.13.145.30 | 10.13.145.31 |
| 10 | 10.13.145.32/27 | 10.13.145.33 – 10.13.145.62 | 10.13.145.63 |
| 11 | 10.13.145.64/27 | 10.13.145.65 – 10.13.145.94 | 10.13.145.95 |
| 12 | 10.13.145.96/27 | 10.13.145.97 – 10.13.145.126 | 10.13.145.127 |
| 13 | 10.13.145.128/27 | 10.13.145.129 – 10.13.145.158 | 10.13.145.159 |
| 14 | 10.13.145.160/27 | 10.13.145.161 – 10.13.145.190 | 10.13.145.191 |
| 15 | 10.13.145.192/27 | 10.13.145.193 – 10.13.145.222 | 10.13.145.223 |
| 16 | 10.13.145.224/27 | 10.13.145.225 – 10.13.145.254 | 10.13.145.255 |
| 17 | 10.13.146.0/27 | 10.13.146.1 – 10.13.146.30 | 10.13.146.31 |
| 18 | 10.13.146.32/27 | 10.13.146.33 – 10.13.146.62 | 10.13.146.63 |
| 19 | 10.13.146.64/27 | 10.13.146.65 – 10.13.146.94 | 10.13.146.95 |
| 20 | 10.13.146.96/27 | 10.13.146.97 – 10.13.146.126 | 10.13.146.127 |
| 21 | 10.13.146.128/27 | 10.13.146.129 – 10.13.146.158 | 10.13.146.159 |
| 22 | 10.13.146.160/27 | 10.13.146.161 – 10.13.146.190 | 10.13.146.191 |
| 23 | 10.13.146.192/27 | 10.13.146.193 – 10.13.146.222 | 10.13.146.223 |
| 24 | 10.13.146.224/27 | 10.13.146.225 – 10.13.146.254 | 10.13.146.255 |
| 25 | 10.13.147.0/27 | 10.13.147.1 – 10.13.147.30 | 10.13.147.31 |
| 26 | 10.13.147.32/27 | 10.13.147.33 – 10.13.147.62 | 10.13.147.63 |
| 27 | 10.13.147.64/27 | 10.13.147.65 – 10.13.147.94 | 10.13.147.95 |
| 28 | 10.13.147.96/27 | 10.13.147.97 – 10.13.147.126 | 10.13.147.127 |
| 29 | 10.13.147.128/27 | 10.13.147.129 – 10.13.147.158 | 10.13.147.159 |
| 30 | 10.13.147.160/27 | 10.13.147.161 – 10.13.147.190 | 10.13.147.191 |
| 31 | 10.13.147.192/27 | 10.13.147.193 – 10.13.147.222 | 10.13.147.223 |
| 32 | 10.13.147.224/27 | 10.13.147.225 – 10.13.147.254 | 10.13.147.255 |
| 33 | 10.13.148.0/27 | 10.13.148.1 – 10.13.148.30 | 10.13.148.31 |
| 34 | 10.13.148.32/27 | 10.13.148.33 – 10.13.148.62 | 10.13.148.63 |
| 35 | 10.13.148.64/27 | 10.13.148.65 – 10.13.148.94 | 10.13.148.95 |
| 36 | 10.13.148.96/27 | 10.13.148.97 – 10.13.148.126 | 10.13.148.127 |
| 37 | 10.13.148.128/27 | 10.13.148.129 – 10.13.148.158 | 10.13.148.159 |
| 38 | 10.13.148.160/27 | 10.13.148.161 – 10.13.148.190 | 10.13.148.191 |
| 39 | 10.13.148.192/27 | 10.13.148.193 – 10.13.148.222 | 10.13.148.223 |
| 40 | 10.13.148.224/27 | 10.13.148.225 – 10.13.148.254 | 10.13.148.255 |
| 41 | 10.13.149.0/27 | 10.13.149.1 – 10.13.149.30 | 10.13.149.31 |
| 42 | 10.13.149.32/27 | 10.13.149.33 – 10.13.149.62 | 10.13.149.63 |
| 43 | 10.13.149.64/27 | 10.13.149.65 – 10.13.149.94 | 10.13.149.95 |
| 44 | 10.13.149.96/27 | 10.13.149.97 – 10.13.149.126 | 10.13.149.127 |
| 45 | 10.13.149.128/27 | 10.13.149.129 – 10.13.149.158 | 10.13.149.159 |
| 46 | 10.13.149.160/27 | 10.13.149.161 – 10.13.149.190 | 10.13.149.191 |
| 47 | 10.13.149.192/27 | 10.13.149.193 – 10.13.149.222 | 10.13.149.223 |
| 48 | 10.13.149.224/27 | 10.13.149.225 – 10.13.149.254 | 10.13.149.255 |
| 49 | 10.13.150.0/27 | 10.13.150.1 – 10.13.150.30 | 10.13.150.31 |
| 50 | 10.13.150.32/27 | 10.13.150.33 – 10.13.150.62 | 10.13.150.63 |
| 51 | 10.13.150.64/27 | 10.13.150.65 – 10.13.150.94 | 10.13.150.95 |
| 52 | 10.13.150.96/27 | 10.13.150.97 – 10.13.150.126 | 10.13.150.127 |
| 53 | 10.13.150.128/27 | 10.13.150.129 – 10.13.150.158 | 10.13.150.159 |
| 54 | 10.13.150.160/27 | 10.13.150.161 – 10.13.150.190 | 10.13.150.191 |
| 55 | 10.13.150.192/27 | 10.13.150.193 – 10.13.150.222 | 10.13.150.223 |
| 56 | 10.13.150.224/27 | 10.13.150.225 – 10.13.150.254 | 10.13.150.255 |
| 57 | 10.13.151.0/27 | 10.13.151.1 – 10.13.151.30 | 10.13.151.31 |
| 58 | 10.13.151.32/27 | 10.13.151.33 – 10.13.151.62 | 10.13.151.63 |
| 59 | 10.13.151.64/27 | 10.13.151.65 – 10.13.151.94 | 10.13.151.95 |
| 60 | 10.13.151.96/27 | 10.13.151.97 – 10.13.151.126 | 10.13.151.127 |
| 61 | 10.13.151.128/27 | 10.13.151.129 – 10.13.151.158 | 10.13.151.159 |
| 62 | 10.13.151.160/27 | 10.13.151.161 – 10.13.151.190 | 10.13.151.191 |
| 63 | 10.13.151.192/27 | 10.13.151.193 – 10.13.151.222 | 10.13.151.223 |
| 64 | 10.13.151.224/27 | 10.13.151.225 – 10.13.151.254 | 10.13.151.255 |
| 65 | 10.13.152.0/27 | 10.13.152.1 – 10.13.152.30 | 10.13.152.31 |
| 66 | 10.13.152.32/27 | 10.13.152.33 – 10.13.152.62 | 10.13.152.63 |
| 67 | 10.13.152.64/27 | 10.13.152.65 – 10.13.152.94 | 10.13.152.95 |
| 68 | 10.13.152.96/27 | 10.13.152.97 – 10.13.152.126 | 10.13.152.127 |
| 69 | 10.13.152.128/27 | 10.13.152.129 – 10.13.152.158 | 10.13.152.159 |
| 70 | 10.13.152.160/27 | 10.13.152.161 – 10.13.152.190 | 10.13.152.191 |
| 71 | 10.13.152.192/27 | 10.13.152.193 – 10.13.152.222 | 10.13.152.223 |
| 72 | 10.13.152.224/27 | 10.13.152.225 – 10.13.152.254 | 10.13.152.255 |
| 73 | 10.13.153.0/27 | 10.13.153.1 – 10.13.153.30 | 10.13.153.31 |
| 74 | 10.13.153.32/27 | 10.13.153.33 – 10.13.153.62 | 10.13.153.63 |
| 75 | 10.13.153.64/27 | 10.13.153.65 – 10.13.153.94 | 10.13.153.95 |
| 76 | 10.13.153.96/27 | 10.13.153.97 – 10.13.153.126 | 10.13.153.127 |
| 77 | 10.13.153.128/27 | 10.13.153.129 – 10.13.153.158 | 10.13.153.159 |
| 78 | 10.13.153.160/27 | 10.13.153.161 – 10.13.153.190 | 10.13.153.191 |
| 79 | 10.13.153.192/27 | 10.13.153.193 – 10.13.153.222 | 10.13.153.223 |
| 80 | 10.13.153.224/27 | 10.13.153.225 – 10.13.153.254 | 10.13.153.255 |
| 81 | 10.13.154.0/27 | 10.13.154.1 – 10.13.154.30 | 10.13.154.31 |
| 82 | 10.13.154.32/27 | 10.13.154.33 – 10.13.154.62 | 10.13.154.63 |
| 83 | 10.13.154.64/27 | 10.13.154.65 – 10.13.154.94 | 10.13.154.95 |
| 84 | 10.13.154.96/27 | 10.13.154.97 – 10.13.154.126 | 10.13.154.127 |
| 85 | 10.13.154.128/27 | 10.13.154.129 – 10.13.154.158 | 10.13.154.159 |
| 86 | 10.13.154.160/27 | 10.13.154.161 – 10.13.154.190 | 10.13.154.191 |
| 87 | 10.13.154.192/27 | 10.13.154.193 – 10.13.154.222 | 10.13.154.223 |
| 88 | 10.13.154.224/27 | 10.13.154.225 – 10.13.154.254 | 10.13.154.255 |
| 89 | 10.13.155.0/27 | 10.13.155.1 – 10.13.155.30 | 10.13.155.31 |
| 90 | 10.13.155.32/27 | 10.13.155.33 – 10.13.155.62 | 10.13.155.63 |
| 91 | 10.13.155.64/27 | 10.13.155.65 – 10.13.155.94 | 10.13.155.95 |
| 92 | 10.13.155.96/27 | 10.13.155.97 – 10.13.155.126 | 10.13.155.127 |
| 93 | 10.13.155.128/27 | 10.13.155.129 – 10.13.155.158 | 10.13.155.159 |
| 94 | 10.13.155.160/27 | 10.13.155.161 – 10.13.155.190 | 10.13.155.191 |
| 95 | 10.13.155.192/27 | 10.13.155.193 – 10.13.155.222 | 10.13.155.223 |
| 96 | 10.13.155.224/27 | 10.13.155.225 – 10.13.155.254 | 10.13.155.255 |
| 97 | 10.13.156.0/27 | 10.13.156.1 – 10.13.156.30 | 10.13.156.31 |
| 98 | 10.13.156.32/27 | 10.13.156.33 – 10.13.156.62 | 10.13.156.63 |
| 99 | 10.13.156.64/27 | 10.13.156.65 – 10.13.156.94 | 10.13.156.95 |
| 100 | 10.13.156.96/27 | 10.13.156.97 – 10.13.156.126 | 10.13.156.127 |
| 101 | 10.13.156.128/27 | 10.13.156.129 – 10.13.156.158 | 10.13.156.159 |
| 102 | 10.13.156.160/27 | 10.13.156.161 – 10.13.156.190 | 10.13.156.191 |
| 103 | 10.13.156.192/27 | 10.13.156.193 – 10.13.156.222 | 10.13.156.223 |
| 104 | 10.13.156.224/27 | 10.13.156.225 – 10.13.156.254 | 10.13.156.255 |
| 105 | 10.13.157.0/27 | 10.13.157.1 – 10.13.157.30 | 10.13.157.31 |
| 106 | 10.13.157.32/27 | 10.13.157.33 – 10.13.157.62 | 10.13.157.63 |
| 107 | 10.13.157.64/27 | 10.13.157.65 – 10.13.157.94 | 10.13.157.95 |
| 108 | 10.13.157.96/27 | 10.13.157.97 – 10.13.157.126 | 10.13.157.127 |
| 109 | 10.13.157.128/27 | 10.13.157.129 – 10.13.157.158 | 10.13.157.159 |
| 110 | 10.13.157.160/27 | 10.13.157.161 – 10.13.157.190 | 10.13.157.191 |
| 111 | 10.13.157.192/27 | 10.13.157.193 – 10.13.157.222 | 10.13.157.223 |
| 112 | 10.13.157.224/27 | 10.13.157.225 – 10.13.157.254 | 10.13.157.255 |
| 113 | 10.13.158.0/27 | 10.13.158.1 – 10.13.158.30 | 10.13.158.31 |
| 114 | 10.13.158.32/27 | 10.13.158.33 – 10.13.158.62 | 10.13.158.63 |
| 115 | 10.13.158.64/27 | 10.13.158.65 – 10.13.158.94 | 10.13.158.95 |
| 116 | 10.13.158.96/27 | 10.13.158.97 – 10.13.158.126 | 10.13.158.127 |
| 117 | 10.13.158.128/27 | 10.13.158.129 – 10.13.158.158 | 10.13.158.159 |
| 118 | 10.13.158.160/27 | 10.13.158.161 – 10.13.158.190 | 10.13.158.191 |
| 119 | 10.13.158.192/27 | 10.13.158.193 – 10.13.158.222 | 10.13.158.223 |
| 120 | 10.13.158.224/27 | 10.13.158.225 – 10.13.158.254 | 10.13.158.255 |
| 121 | 10.13.159.0/27 | 10.13.159.1 – 10.13.159.30 | 10.13.159.31 |
| 122 | 10.13.159.32/27 | 10.13.159.33 – 10.13.159.62 | 10.13.159.63 |
| 123 | 10.13.159.64/27 | 10.13.159.65 – 10.13.159.94 | 10.13.159.95 |
| 124 | 10.13.159.96/27 | 10.13.159.97 – 10.13.159.126 | 10.13.159.127 |
| 125 | 10.13.159.128/27 | 10.13.159.129 – 10.13.159.158 | 10.13.159.159 |
| 126 | 10.13.159.160/27 | 10.13.159.161 – 10.13.159.190 | 10.13.159.191 |
| 127 | 10.13.159.192/27 | 10.13.159.193 – 10.13.159.222 | 10.13.159.223 |
| 128 | 10.13.159.224/27 | 10.13.159.225 – 10.13.159.254 | 10.13.159.255 |
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 /20 |
|---|---|---|---|---|
| /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 | 1 |
| /21 | 255.255.248.0 | 2,048 | 2,046 | 2 split → |
| /22 | 255.255.252.0 | 1,024 | 1,022 | 4 split → |
| /23 | 255.255.254.0 | 512 | 510 | 8 split → |
| /24 | 255.255.255.0 | 256 | 254 | 16 split → |
| /25 | 255.255.255.128 | 128 | 126 | 32 split → |
| /26 | 255.255.255.192 | 64 | 62 | 64 split → |
| /27 | 255.255.255.224 | 32 | 30 | 128 split → |
| /28 | 255.255.255.240 | 16 | 14 | 256 split → |
| /29 | 255.255.255.248 | 8 | 6 | 512 split → |
| /30 | 255.255.255.252 | 4 | 2 | 1,024 split → |
| /31 | 255.255.255.254 | 2 | 2 | 2,048 split → |
| /32 | 255.255.255.255 | 1 | 1 | 4,096 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.