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)10.203.0.0/16
network10.203.0.0/16
broadcast10.203.255.255
first host10.203.0.1
last host10.203.255.254
subnet mask255.255.0.0
wildcard0.0.255.255
addresses65,536
usable hosts65,534
classA
ipcalc 10.203.0.0/16
address00001010.11001011.00000000.00000000
subnet mask11111111.11111111.00000000.00000000
network00001010.11001011.00000000.00000000
broadcast00001010.11001011.11111111.11111111
green = network part, grey = host part
hex0x0acb0000
decimal181075968
reverse dns0.0.203.10.in-addr.arpa
ipv4-mapped::ffff:acb:0
/16 split into /27 · 2,048 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.203.0.0/27 | 10.203.0.1 – 10.203.0.30 | 10.203.0.31 |
| 2 | 10.203.0.32/27 | 10.203.0.33 – 10.203.0.62 | 10.203.0.63 |
| 3 | 10.203.0.64/27 | 10.203.0.65 – 10.203.0.94 | 10.203.0.95 |
| 4 | 10.203.0.96/27 | 10.203.0.97 – 10.203.0.126 | 10.203.0.127 |
| 5 | 10.203.0.128/27 | 10.203.0.129 – 10.203.0.158 | 10.203.0.159 |
| 6 | 10.203.0.160/27 | 10.203.0.161 – 10.203.0.190 | 10.203.0.191 |
| 7 | 10.203.0.192/27 | 10.203.0.193 – 10.203.0.222 | 10.203.0.223 |
| 8 | 10.203.0.224/27 | 10.203.0.225 – 10.203.0.254 | 10.203.0.255 |
| 9 | 10.203.1.0/27 | 10.203.1.1 – 10.203.1.30 | 10.203.1.31 |
| 10 | 10.203.1.32/27 | 10.203.1.33 – 10.203.1.62 | 10.203.1.63 |
| 11 | 10.203.1.64/27 | 10.203.1.65 – 10.203.1.94 | 10.203.1.95 |
| 12 | 10.203.1.96/27 | 10.203.1.97 – 10.203.1.126 | 10.203.1.127 |
| 13 | 10.203.1.128/27 | 10.203.1.129 – 10.203.1.158 | 10.203.1.159 |
| 14 | 10.203.1.160/27 | 10.203.1.161 – 10.203.1.190 | 10.203.1.191 |
| 15 | 10.203.1.192/27 | 10.203.1.193 – 10.203.1.222 | 10.203.1.223 |
| 16 | 10.203.1.224/27 | 10.203.1.225 – 10.203.1.254 | 10.203.1.255 |
| 17 | 10.203.2.0/27 | 10.203.2.1 – 10.203.2.30 | 10.203.2.31 |
| 18 | 10.203.2.32/27 | 10.203.2.33 – 10.203.2.62 | 10.203.2.63 |
| 19 | 10.203.2.64/27 | 10.203.2.65 – 10.203.2.94 | 10.203.2.95 |
| 20 | 10.203.2.96/27 | 10.203.2.97 – 10.203.2.126 | 10.203.2.127 |
| 21 | 10.203.2.128/27 | 10.203.2.129 – 10.203.2.158 | 10.203.2.159 |
| 22 | 10.203.2.160/27 | 10.203.2.161 – 10.203.2.190 | 10.203.2.191 |
| 23 | 10.203.2.192/27 | 10.203.2.193 – 10.203.2.222 | 10.203.2.223 |
| 24 | 10.203.2.224/27 | 10.203.2.225 – 10.203.2.254 | 10.203.2.255 |
| 25 | 10.203.3.0/27 | 10.203.3.1 – 10.203.3.30 | 10.203.3.31 |
| 26 | 10.203.3.32/27 | 10.203.3.33 – 10.203.3.62 | 10.203.3.63 |
| 27 | 10.203.3.64/27 | 10.203.3.65 – 10.203.3.94 | 10.203.3.95 |
| 28 | 10.203.3.96/27 | 10.203.3.97 – 10.203.3.126 | 10.203.3.127 |
| 29 | 10.203.3.128/27 | 10.203.3.129 – 10.203.3.158 | 10.203.3.159 |
| 30 | 10.203.3.160/27 | 10.203.3.161 – 10.203.3.190 | 10.203.3.191 |
| 31 | 10.203.3.192/27 | 10.203.3.193 – 10.203.3.222 | 10.203.3.223 |
| 32 | 10.203.3.224/27 | 10.203.3.225 – 10.203.3.254 | 10.203.3.255 |
| 33 | 10.203.4.0/27 | 10.203.4.1 – 10.203.4.30 | 10.203.4.31 |
| 34 | 10.203.4.32/27 | 10.203.4.33 – 10.203.4.62 | 10.203.4.63 |
| 35 | 10.203.4.64/27 | 10.203.4.65 – 10.203.4.94 | 10.203.4.95 |
| 36 | 10.203.4.96/27 | 10.203.4.97 – 10.203.4.126 | 10.203.4.127 |
| 37 | 10.203.4.128/27 | 10.203.4.129 – 10.203.4.158 | 10.203.4.159 |
| 38 | 10.203.4.160/27 | 10.203.4.161 – 10.203.4.190 | 10.203.4.191 |
| 39 | 10.203.4.192/27 | 10.203.4.193 – 10.203.4.222 | 10.203.4.223 |
| 40 | 10.203.4.224/27 | 10.203.4.225 – 10.203.4.254 | 10.203.4.255 |
| 41 | 10.203.5.0/27 | 10.203.5.1 – 10.203.5.30 | 10.203.5.31 |
| 42 | 10.203.5.32/27 | 10.203.5.33 – 10.203.5.62 | 10.203.5.63 |
| 43 | 10.203.5.64/27 | 10.203.5.65 – 10.203.5.94 | 10.203.5.95 |
| 44 | 10.203.5.96/27 | 10.203.5.97 – 10.203.5.126 | 10.203.5.127 |
| 45 | 10.203.5.128/27 | 10.203.5.129 – 10.203.5.158 | 10.203.5.159 |
| 46 | 10.203.5.160/27 | 10.203.5.161 – 10.203.5.190 | 10.203.5.191 |
| 47 | 10.203.5.192/27 | 10.203.5.193 – 10.203.5.222 | 10.203.5.223 |
| 48 | 10.203.5.224/27 | 10.203.5.225 – 10.203.5.254 | 10.203.5.255 |
| 49 | 10.203.6.0/27 | 10.203.6.1 – 10.203.6.30 | 10.203.6.31 |
| 50 | 10.203.6.32/27 | 10.203.6.33 – 10.203.6.62 | 10.203.6.63 |
| 51 | 10.203.6.64/27 | 10.203.6.65 – 10.203.6.94 | 10.203.6.95 |
| 52 | 10.203.6.96/27 | 10.203.6.97 – 10.203.6.126 | 10.203.6.127 |
| 53 | 10.203.6.128/27 | 10.203.6.129 – 10.203.6.158 | 10.203.6.159 |
| 54 | 10.203.6.160/27 | 10.203.6.161 – 10.203.6.190 | 10.203.6.191 |
| 55 | 10.203.6.192/27 | 10.203.6.193 – 10.203.6.222 | 10.203.6.223 |
| 56 | 10.203.6.224/27 | 10.203.6.225 – 10.203.6.254 | 10.203.6.255 |
| 57 | 10.203.7.0/27 | 10.203.7.1 – 10.203.7.30 | 10.203.7.31 |
| 58 | 10.203.7.32/27 | 10.203.7.33 – 10.203.7.62 | 10.203.7.63 |
| 59 | 10.203.7.64/27 | 10.203.7.65 – 10.203.7.94 | 10.203.7.95 |
| 60 | 10.203.7.96/27 | 10.203.7.97 – 10.203.7.126 | 10.203.7.127 |
| 61 | 10.203.7.128/27 | 10.203.7.129 – 10.203.7.158 | 10.203.7.159 |
| 62 | 10.203.7.160/27 | 10.203.7.161 – 10.203.7.190 | 10.203.7.191 |
| 63 | 10.203.7.192/27 | 10.203.7.193 – 10.203.7.222 | 10.203.7.223 |
| 64 | 10.203.7.224/27 | 10.203.7.225 – 10.203.7.254 | 10.203.7.255 |
| 65 | 10.203.8.0/27 | 10.203.8.1 – 10.203.8.30 | 10.203.8.31 |
| 66 | 10.203.8.32/27 | 10.203.8.33 – 10.203.8.62 | 10.203.8.63 |
| 67 | 10.203.8.64/27 | 10.203.8.65 – 10.203.8.94 | 10.203.8.95 |
| 68 | 10.203.8.96/27 | 10.203.8.97 – 10.203.8.126 | 10.203.8.127 |
| 69 | 10.203.8.128/27 | 10.203.8.129 – 10.203.8.158 | 10.203.8.159 |
| 70 | 10.203.8.160/27 | 10.203.8.161 – 10.203.8.190 | 10.203.8.191 |
| 71 | 10.203.8.192/27 | 10.203.8.193 – 10.203.8.222 | 10.203.8.223 |
| 72 | 10.203.8.224/27 | 10.203.8.225 – 10.203.8.254 | 10.203.8.255 |
| 73 | 10.203.9.0/27 | 10.203.9.1 – 10.203.9.30 | 10.203.9.31 |
| 74 | 10.203.9.32/27 | 10.203.9.33 – 10.203.9.62 | 10.203.9.63 |
| 75 | 10.203.9.64/27 | 10.203.9.65 – 10.203.9.94 | 10.203.9.95 |
| 76 | 10.203.9.96/27 | 10.203.9.97 – 10.203.9.126 | 10.203.9.127 |
| 77 | 10.203.9.128/27 | 10.203.9.129 – 10.203.9.158 | 10.203.9.159 |
| 78 | 10.203.9.160/27 | 10.203.9.161 – 10.203.9.190 | 10.203.9.191 |
| 79 | 10.203.9.192/27 | 10.203.9.193 – 10.203.9.222 | 10.203.9.223 |
| 80 | 10.203.9.224/27 | 10.203.9.225 – 10.203.9.254 | 10.203.9.255 |
| 81 | 10.203.10.0/27 | 10.203.10.1 – 10.203.10.30 | 10.203.10.31 |
| 82 | 10.203.10.32/27 | 10.203.10.33 – 10.203.10.62 | 10.203.10.63 |
| 83 | 10.203.10.64/27 | 10.203.10.65 – 10.203.10.94 | 10.203.10.95 |
| 84 | 10.203.10.96/27 | 10.203.10.97 – 10.203.10.126 | 10.203.10.127 |
| 85 | 10.203.10.128/27 | 10.203.10.129 – 10.203.10.158 | 10.203.10.159 |
| 86 | 10.203.10.160/27 | 10.203.10.161 – 10.203.10.190 | 10.203.10.191 |
| 87 | 10.203.10.192/27 | 10.203.10.193 – 10.203.10.222 | 10.203.10.223 |
| 88 | 10.203.10.224/27 | 10.203.10.225 – 10.203.10.254 | 10.203.10.255 |
| 89 | 10.203.11.0/27 | 10.203.11.1 – 10.203.11.30 | 10.203.11.31 |
| 90 | 10.203.11.32/27 | 10.203.11.33 – 10.203.11.62 | 10.203.11.63 |
| 91 | 10.203.11.64/27 | 10.203.11.65 – 10.203.11.94 | 10.203.11.95 |
| 92 | 10.203.11.96/27 | 10.203.11.97 – 10.203.11.126 | 10.203.11.127 |
| 93 | 10.203.11.128/27 | 10.203.11.129 – 10.203.11.158 | 10.203.11.159 |
| 94 | 10.203.11.160/27 | 10.203.11.161 – 10.203.11.190 | 10.203.11.191 |
| 95 | 10.203.11.192/27 | 10.203.11.193 – 10.203.11.222 | 10.203.11.223 |
| 96 | 10.203.11.224/27 | 10.203.11.225 – 10.203.11.254 | 10.203.11.255 |
| 97 | 10.203.12.0/27 | 10.203.12.1 – 10.203.12.30 | 10.203.12.31 |
| 98 | 10.203.12.32/27 | 10.203.12.33 – 10.203.12.62 | 10.203.12.63 |
| 99 | 10.203.12.64/27 | 10.203.12.65 – 10.203.12.94 | 10.203.12.95 |
| 100 | 10.203.12.96/27 | 10.203.12.97 – 10.203.12.126 | 10.203.12.127 |
| 101 | 10.203.12.128/27 | 10.203.12.129 – 10.203.12.158 | 10.203.12.159 |
| 102 | 10.203.12.160/27 | 10.203.12.161 – 10.203.12.190 | 10.203.12.191 |
| 103 | 10.203.12.192/27 | 10.203.12.193 – 10.203.12.222 | 10.203.12.223 |
| 104 | 10.203.12.224/27 | 10.203.12.225 – 10.203.12.254 | 10.203.12.255 |
| 105 | 10.203.13.0/27 | 10.203.13.1 – 10.203.13.30 | 10.203.13.31 |
| 106 | 10.203.13.32/27 | 10.203.13.33 – 10.203.13.62 | 10.203.13.63 |
| 107 | 10.203.13.64/27 | 10.203.13.65 – 10.203.13.94 | 10.203.13.95 |
| 108 | 10.203.13.96/27 | 10.203.13.97 – 10.203.13.126 | 10.203.13.127 |
| 109 | 10.203.13.128/27 | 10.203.13.129 – 10.203.13.158 | 10.203.13.159 |
| 110 | 10.203.13.160/27 | 10.203.13.161 – 10.203.13.190 | 10.203.13.191 |
| 111 | 10.203.13.192/27 | 10.203.13.193 – 10.203.13.222 | 10.203.13.223 |
| 112 | 10.203.13.224/27 | 10.203.13.225 – 10.203.13.254 | 10.203.13.255 |
| 113 | 10.203.14.0/27 | 10.203.14.1 – 10.203.14.30 | 10.203.14.31 |
| 114 | 10.203.14.32/27 | 10.203.14.33 – 10.203.14.62 | 10.203.14.63 |
| 115 | 10.203.14.64/27 | 10.203.14.65 – 10.203.14.94 | 10.203.14.95 |
| 116 | 10.203.14.96/27 | 10.203.14.97 – 10.203.14.126 | 10.203.14.127 |
| 117 | 10.203.14.128/27 | 10.203.14.129 – 10.203.14.158 | 10.203.14.159 |
| 118 | 10.203.14.160/27 | 10.203.14.161 – 10.203.14.190 | 10.203.14.191 |
| 119 | 10.203.14.192/27 | 10.203.14.193 – 10.203.14.222 | 10.203.14.223 |
| 120 | 10.203.14.224/27 | 10.203.14.225 – 10.203.14.254 | 10.203.14.255 |
| 121 | 10.203.15.0/27 | 10.203.15.1 – 10.203.15.30 | 10.203.15.31 |
| 122 | 10.203.15.32/27 | 10.203.15.33 – 10.203.15.62 | 10.203.15.63 |
| 123 | 10.203.15.64/27 | 10.203.15.65 – 10.203.15.94 | 10.203.15.95 |
| 124 | 10.203.15.96/27 | 10.203.15.97 – 10.203.15.126 | 10.203.15.127 |
| 125 | 10.203.15.128/27 | 10.203.15.129 – 10.203.15.158 | 10.203.15.159 |
| 126 | 10.203.15.160/27 | 10.203.15.161 – 10.203.15.190 | 10.203.15.191 |
| 127 | 10.203.15.192/27 | 10.203.15.193 – 10.203.15.222 | 10.203.15.223 |
| 128 | 10.203.15.224/27 | 10.203.15.225 – 10.203.15.254 | 10.203.15.255 |
| 129 | 10.203.16.0/27 | 10.203.16.1 – 10.203.16.30 | 10.203.16.31 |
| 130 | 10.203.16.32/27 | 10.203.16.33 – 10.203.16.62 | 10.203.16.63 |
| 131 | 10.203.16.64/27 | 10.203.16.65 – 10.203.16.94 | 10.203.16.95 |
| 132 | 10.203.16.96/27 | 10.203.16.97 – 10.203.16.126 | 10.203.16.127 |
| 133 | 10.203.16.128/27 | 10.203.16.129 – 10.203.16.158 | 10.203.16.159 |
| 134 | 10.203.16.160/27 | 10.203.16.161 – 10.203.16.190 | 10.203.16.191 |
| 135 | 10.203.16.192/27 | 10.203.16.193 – 10.203.16.222 | 10.203.16.223 |
| 136 | 10.203.16.224/27 | 10.203.16.225 – 10.203.16.254 | 10.203.16.255 |
| 137 | 10.203.17.0/27 | 10.203.17.1 – 10.203.17.30 | 10.203.17.31 |
| 138 | 10.203.17.32/27 | 10.203.17.33 – 10.203.17.62 | 10.203.17.63 |
| 139 | 10.203.17.64/27 | 10.203.17.65 – 10.203.17.94 | 10.203.17.95 |
| 140 | 10.203.17.96/27 | 10.203.17.97 – 10.203.17.126 | 10.203.17.127 |
| 141 | 10.203.17.128/27 | 10.203.17.129 – 10.203.17.158 | 10.203.17.159 |
| 142 | 10.203.17.160/27 | 10.203.17.161 – 10.203.17.190 | 10.203.17.191 |
| 143 | 10.203.17.192/27 | 10.203.17.193 – 10.203.17.222 | 10.203.17.223 |
| 144 | 10.203.17.224/27 | 10.203.17.225 – 10.203.17.254 | 10.203.17.255 |
| 145 | 10.203.18.0/27 | 10.203.18.1 – 10.203.18.30 | 10.203.18.31 |
| 146 | 10.203.18.32/27 | 10.203.18.33 – 10.203.18.62 | 10.203.18.63 |
| 147 | 10.203.18.64/27 | 10.203.18.65 – 10.203.18.94 | 10.203.18.95 |
| 148 | 10.203.18.96/27 | 10.203.18.97 – 10.203.18.126 | 10.203.18.127 |
| 149 | 10.203.18.128/27 | 10.203.18.129 – 10.203.18.158 | 10.203.18.159 |
| 150 | 10.203.18.160/27 | 10.203.18.161 – 10.203.18.190 | 10.203.18.191 |
| 151 | 10.203.18.192/27 | 10.203.18.193 – 10.203.18.222 | 10.203.18.223 |
| 152 | 10.203.18.224/27 | 10.203.18.225 – 10.203.18.254 | 10.203.18.255 |
| 153 | 10.203.19.0/27 | 10.203.19.1 – 10.203.19.30 | 10.203.19.31 |
| 154 | 10.203.19.32/27 | 10.203.19.33 – 10.203.19.62 | 10.203.19.63 |
| 155 | 10.203.19.64/27 | 10.203.19.65 – 10.203.19.94 | 10.203.19.95 |
| 156 | 10.203.19.96/27 | 10.203.19.97 – 10.203.19.126 | 10.203.19.127 |
| 157 | 10.203.19.128/27 | 10.203.19.129 – 10.203.19.158 | 10.203.19.159 |
| 158 | 10.203.19.160/27 | 10.203.19.161 – 10.203.19.190 | 10.203.19.191 |
| 159 | 10.203.19.192/27 | 10.203.19.193 – 10.203.19.222 | 10.203.19.223 |
| 160 | 10.203.19.224/27 | 10.203.19.225 – 10.203.19.254 | 10.203.19.255 |
| 161 | 10.203.20.0/27 | 10.203.20.1 – 10.203.20.30 | 10.203.20.31 |
| 162 | 10.203.20.32/27 | 10.203.20.33 – 10.203.20.62 | 10.203.20.63 |
| 163 | 10.203.20.64/27 | 10.203.20.65 – 10.203.20.94 | 10.203.20.95 |
| 164 | 10.203.20.96/27 | 10.203.20.97 – 10.203.20.126 | 10.203.20.127 |
| 165 | 10.203.20.128/27 | 10.203.20.129 – 10.203.20.158 | 10.203.20.159 |
| 166 | 10.203.20.160/27 | 10.203.20.161 – 10.203.20.190 | 10.203.20.191 |
| 167 | 10.203.20.192/27 | 10.203.20.193 – 10.203.20.222 | 10.203.20.223 |
| 168 | 10.203.20.224/27 | 10.203.20.225 – 10.203.20.254 | 10.203.20.255 |
| 169 | 10.203.21.0/27 | 10.203.21.1 – 10.203.21.30 | 10.203.21.31 |
| 170 | 10.203.21.32/27 | 10.203.21.33 – 10.203.21.62 | 10.203.21.63 |
| 171 | 10.203.21.64/27 | 10.203.21.65 – 10.203.21.94 | 10.203.21.95 |
| 172 | 10.203.21.96/27 | 10.203.21.97 – 10.203.21.126 | 10.203.21.127 |
| 173 | 10.203.21.128/27 | 10.203.21.129 – 10.203.21.158 | 10.203.21.159 |
| 174 | 10.203.21.160/27 | 10.203.21.161 – 10.203.21.190 | 10.203.21.191 |
| 175 | 10.203.21.192/27 | 10.203.21.193 – 10.203.21.222 | 10.203.21.223 |
| 176 | 10.203.21.224/27 | 10.203.21.225 – 10.203.21.254 | 10.203.21.255 |
| 177 | 10.203.22.0/27 | 10.203.22.1 – 10.203.22.30 | 10.203.22.31 |
| 178 | 10.203.22.32/27 | 10.203.22.33 – 10.203.22.62 | 10.203.22.63 |
| 179 | 10.203.22.64/27 | 10.203.22.65 – 10.203.22.94 | 10.203.22.95 |
| 180 | 10.203.22.96/27 | 10.203.22.97 – 10.203.22.126 | 10.203.22.127 |
| 181 | 10.203.22.128/27 | 10.203.22.129 – 10.203.22.158 | 10.203.22.159 |
| 182 | 10.203.22.160/27 | 10.203.22.161 – 10.203.22.190 | 10.203.22.191 |
| 183 | 10.203.22.192/27 | 10.203.22.193 – 10.203.22.222 | 10.203.22.223 |
| 184 | 10.203.22.224/27 | 10.203.22.225 – 10.203.22.254 | 10.203.22.255 |
| 185 | 10.203.23.0/27 | 10.203.23.1 – 10.203.23.30 | 10.203.23.31 |
| 186 | 10.203.23.32/27 | 10.203.23.33 – 10.203.23.62 | 10.203.23.63 |
| 187 | 10.203.23.64/27 | 10.203.23.65 – 10.203.23.94 | 10.203.23.95 |
| 188 | 10.203.23.96/27 | 10.203.23.97 – 10.203.23.126 | 10.203.23.127 |
| 189 | 10.203.23.128/27 | 10.203.23.129 – 10.203.23.158 | 10.203.23.159 |
| 190 | 10.203.23.160/27 | 10.203.23.161 – 10.203.23.190 | 10.203.23.191 |
| 191 | 10.203.23.192/27 | 10.203.23.193 – 10.203.23.222 | 10.203.23.223 |
| 192 | 10.203.23.224/27 | 10.203.23.225 – 10.203.23.254 | 10.203.23.255 |
| 193 | 10.203.24.0/27 | 10.203.24.1 – 10.203.24.30 | 10.203.24.31 |
| 194 | 10.203.24.32/27 | 10.203.24.33 – 10.203.24.62 | 10.203.24.63 |
| 195 | 10.203.24.64/27 | 10.203.24.65 – 10.203.24.94 | 10.203.24.95 |
| 196 | 10.203.24.96/27 | 10.203.24.97 – 10.203.24.126 | 10.203.24.127 |
| 197 | 10.203.24.128/27 | 10.203.24.129 – 10.203.24.158 | 10.203.24.159 |
| 198 | 10.203.24.160/27 | 10.203.24.161 – 10.203.24.190 | 10.203.24.191 |
| 199 | 10.203.24.192/27 | 10.203.24.193 – 10.203.24.222 | 10.203.24.223 |
| 200 | 10.203.24.224/27 | 10.203.24.225 – 10.203.24.254 | 10.203.24.255 |
| 201 | 10.203.25.0/27 | 10.203.25.1 – 10.203.25.30 | 10.203.25.31 |
| 202 | 10.203.25.32/27 | 10.203.25.33 – 10.203.25.62 | 10.203.25.63 |
| 203 | 10.203.25.64/27 | 10.203.25.65 – 10.203.25.94 | 10.203.25.95 |
| 204 | 10.203.25.96/27 | 10.203.25.97 – 10.203.25.126 | 10.203.25.127 |
| 205 | 10.203.25.128/27 | 10.203.25.129 – 10.203.25.158 | 10.203.25.159 |
| 206 | 10.203.25.160/27 | 10.203.25.161 – 10.203.25.190 | 10.203.25.191 |
| 207 | 10.203.25.192/27 | 10.203.25.193 – 10.203.25.222 | 10.203.25.223 |
| 208 | 10.203.25.224/27 | 10.203.25.225 – 10.203.25.254 | 10.203.25.255 |
| 209 | 10.203.26.0/27 | 10.203.26.1 – 10.203.26.30 | 10.203.26.31 |
| 210 | 10.203.26.32/27 | 10.203.26.33 – 10.203.26.62 | 10.203.26.63 |
| 211 | 10.203.26.64/27 | 10.203.26.65 – 10.203.26.94 | 10.203.26.95 |
| 212 | 10.203.26.96/27 | 10.203.26.97 – 10.203.26.126 | 10.203.26.127 |
| 213 | 10.203.26.128/27 | 10.203.26.129 – 10.203.26.158 | 10.203.26.159 |
| 214 | 10.203.26.160/27 | 10.203.26.161 – 10.203.26.190 | 10.203.26.191 |
| 215 | 10.203.26.192/27 | 10.203.26.193 – 10.203.26.222 | 10.203.26.223 |
| 216 | 10.203.26.224/27 | 10.203.26.225 – 10.203.26.254 | 10.203.26.255 |
| 217 | 10.203.27.0/27 | 10.203.27.1 – 10.203.27.30 | 10.203.27.31 |
| 218 | 10.203.27.32/27 | 10.203.27.33 – 10.203.27.62 | 10.203.27.63 |
| 219 | 10.203.27.64/27 | 10.203.27.65 – 10.203.27.94 | 10.203.27.95 |
| 220 | 10.203.27.96/27 | 10.203.27.97 – 10.203.27.126 | 10.203.27.127 |
| 221 | 10.203.27.128/27 | 10.203.27.129 – 10.203.27.158 | 10.203.27.159 |
| 222 | 10.203.27.160/27 | 10.203.27.161 – 10.203.27.190 | 10.203.27.191 |
| 223 | 10.203.27.192/27 | 10.203.27.193 – 10.203.27.222 | 10.203.27.223 |
| 224 | 10.203.27.224/27 | 10.203.27.225 – 10.203.27.254 | 10.203.27.255 |
| 225 | 10.203.28.0/27 | 10.203.28.1 – 10.203.28.30 | 10.203.28.31 |
| 226 | 10.203.28.32/27 | 10.203.28.33 – 10.203.28.62 | 10.203.28.63 |
| 227 | 10.203.28.64/27 | 10.203.28.65 – 10.203.28.94 | 10.203.28.95 |
| 228 | 10.203.28.96/27 | 10.203.28.97 – 10.203.28.126 | 10.203.28.127 |
| 229 | 10.203.28.128/27 | 10.203.28.129 – 10.203.28.158 | 10.203.28.159 |
| 230 | 10.203.28.160/27 | 10.203.28.161 – 10.203.28.190 | 10.203.28.191 |
| 231 | 10.203.28.192/27 | 10.203.28.193 – 10.203.28.222 | 10.203.28.223 |
| 232 | 10.203.28.224/27 | 10.203.28.225 – 10.203.28.254 | 10.203.28.255 |
| 233 | 10.203.29.0/27 | 10.203.29.1 – 10.203.29.30 | 10.203.29.31 |
| 234 | 10.203.29.32/27 | 10.203.29.33 – 10.203.29.62 | 10.203.29.63 |
| 235 | 10.203.29.64/27 | 10.203.29.65 – 10.203.29.94 | 10.203.29.95 |
| 236 | 10.203.29.96/27 | 10.203.29.97 – 10.203.29.126 | 10.203.29.127 |
| 237 | 10.203.29.128/27 | 10.203.29.129 – 10.203.29.158 | 10.203.29.159 |
| 238 | 10.203.29.160/27 | 10.203.29.161 – 10.203.29.190 | 10.203.29.191 |
| 239 | 10.203.29.192/27 | 10.203.29.193 – 10.203.29.222 | 10.203.29.223 |
| 240 | 10.203.29.224/27 | 10.203.29.225 – 10.203.29.254 | 10.203.29.255 |
| 241 | 10.203.30.0/27 | 10.203.30.1 – 10.203.30.30 | 10.203.30.31 |
| 242 | 10.203.30.32/27 | 10.203.30.33 – 10.203.30.62 | 10.203.30.63 |
| 243 | 10.203.30.64/27 | 10.203.30.65 – 10.203.30.94 | 10.203.30.95 |
| 244 | 10.203.30.96/27 | 10.203.30.97 – 10.203.30.126 | 10.203.30.127 |
| 245 | 10.203.30.128/27 | 10.203.30.129 – 10.203.30.158 | 10.203.30.159 |
| 246 | 10.203.30.160/27 | 10.203.30.161 – 10.203.30.190 | 10.203.30.191 |
| 247 | 10.203.30.192/27 | 10.203.30.193 – 10.203.30.222 | 10.203.30.223 |
| 248 | 10.203.30.224/27 | 10.203.30.225 – 10.203.30.254 | 10.203.30.255 |
| 249 | 10.203.31.0/27 | 10.203.31.1 – 10.203.31.30 | 10.203.31.31 |
| 250 | 10.203.31.32/27 | 10.203.31.33 – 10.203.31.62 | 10.203.31.63 |
| 251 | 10.203.31.64/27 | 10.203.31.65 – 10.203.31.94 | 10.203.31.95 |
| 252 | 10.203.31.96/27 | 10.203.31.97 – 10.203.31.126 | 10.203.31.127 |
| 253 | 10.203.31.128/27 | 10.203.31.129 – 10.203.31.158 | 10.203.31.159 |
| 254 | 10.203.31.160/27 | 10.203.31.161 – 10.203.31.190 | 10.203.31.191 |
| 255 | 10.203.31.192/27 | 10.203.31.193 – 10.203.31.222 | 10.203.31.223 |
| 256 | 10.203.31.224/27 | 10.203.31.225 – 10.203.31.254 | 10.203.31.255 |
showing 256 of 2,048
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 /16 |
|---|---|---|---|---|
| /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 | 1 |
| /17 | 255.255.128.0 | 32,768 | 32,766 | 2 split → |
| /18 | 255.255.192.0 | 16,384 | 16,382 | 4 split → |
| /19 | 255.255.224.0 | 8,192 | 8,190 | 8 split → |
| /20 | 255.255.240.0 | 4,096 | 4,094 | 16 split → |
| /21 | 255.255.248.0 | 2,048 | 2,046 | 32 split → |
| /22 | 255.255.252.0 | 1,024 | 1,022 | 64 split → |
| /23 | 255.255.254.0 | 512 | 510 | 128 split → |
| /24 | 255.255.255.0 | 256 | 254 | 256 split → |
| /25 | 255.255.255.128 | 128 | 126 | 512 split → |
| /26 | 255.255.255.192 | 64 | 62 | 1,024 split → |
| /27 | 255.255.255.224 | 32 | 30 | 2,048 split → |
| /28 | 255.255.255.240 | 16 | 14 | 4,096 split → |
| /29 | 255.255.255.248 | 8 | 6 | 8,192 split → |
| /30 | 255.255.255.252 | 4 | 2 | 16,384 split → |
| /31 | 255.255.255.254 | 2 | 2 | 32,768 split → |
| /32 | 255.255.255.255 | 1 | 1 | 65,536 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.