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)10.251.0.0/16
network10.251.0.0/16
broadcast10.251.255.255
first host10.251.0.1
last host10.251.255.254
subnet mask255.255.0.0
wildcard0.0.255.255
addresses65,536
usable hosts65,534
classA
ipcalc 10.251.0.0/16
address00001010.11111011.00000000.00000000
subnet mask11111111.11111111.00000000.00000000
network00001010.11111011.00000000.00000000
broadcast00001010.11111011.11111111.11111111
green = network part, grey = host part
hex0x0afb0000
decimal184221696
reverse dns0.0.251.10.in-addr.arpa
ipv4-mapped::ffff:afb:0
/16 split into /27 · 2,048 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.251.0.0/27 | 10.251.0.1 – 10.251.0.30 | 10.251.0.31 |
| 2 | 10.251.0.32/27 | 10.251.0.33 – 10.251.0.62 | 10.251.0.63 |
| 3 | 10.251.0.64/27 | 10.251.0.65 – 10.251.0.94 | 10.251.0.95 |
| 4 | 10.251.0.96/27 | 10.251.0.97 – 10.251.0.126 | 10.251.0.127 |
| 5 | 10.251.0.128/27 | 10.251.0.129 – 10.251.0.158 | 10.251.0.159 |
| 6 | 10.251.0.160/27 | 10.251.0.161 – 10.251.0.190 | 10.251.0.191 |
| 7 | 10.251.0.192/27 | 10.251.0.193 – 10.251.0.222 | 10.251.0.223 |
| 8 | 10.251.0.224/27 | 10.251.0.225 – 10.251.0.254 | 10.251.0.255 |
| 9 | 10.251.1.0/27 | 10.251.1.1 – 10.251.1.30 | 10.251.1.31 |
| 10 | 10.251.1.32/27 | 10.251.1.33 – 10.251.1.62 | 10.251.1.63 |
| 11 | 10.251.1.64/27 | 10.251.1.65 – 10.251.1.94 | 10.251.1.95 |
| 12 | 10.251.1.96/27 | 10.251.1.97 – 10.251.1.126 | 10.251.1.127 |
| 13 | 10.251.1.128/27 | 10.251.1.129 – 10.251.1.158 | 10.251.1.159 |
| 14 | 10.251.1.160/27 | 10.251.1.161 – 10.251.1.190 | 10.251.1.191 |
| 15 | 10.251.1.192/27 | 10.251.1.193 – 10.251.1.222 | 10.251.1.223 |
| 16 | 10.251.1.224/27 | 10.251.1.225 – 10.251.1.254 | 10.251.1.255 |
| 17 | 10.251.2.0/27 | 10.251.2.1 – 10.251.2.30 | 10.251.2.31 |
| 18 | 10.251.2.32/27 | 10.251.2.33 – 10.251.2.62 | 10.251.2.63 |
| 19 | 10.251.2.64/27 | 10.251.2.65 – 10.251.2.94 | 10.251.2.95 |
| 20 | 10.251.2.96/27 | 10.251.2.97 – 10.251.2.126 | 10.251.2.127 |
| 21 | 10.251.2.128/27 | 10.251.2.129 – 10.251.2.158 | 10.251.2.159 |
| 22 | 10.251.2.160/27 | 10.251.2.161 – 10.251.2.190 | 10.251.2.191 |
| 23 | 10.251.2.192/27 | 10.251.2.193 – 10.251.2.222 | 10.251.2.223 |
| 24 | 10.251.2.224/27 | 10.251.2.225 – 10.251.2.254 | 10.251.2.255 |
| 25 | 10.251.3.0/27 | 10.251.3.1 – 10.251.3.30 | 10.251.3.31 |
| 26 | 10.251.3.32/27 | 10.251.3.33 – 10.251.3.62 | 10.251.3.63 |
| 27 | 10.251.3.64/27 | 10.251.3.65 – 10.251.3.94 | 10.251.3.95 |
| 28 | 10.251.3.96/27 | 10.251.3.97 – 10.251.3.126 | 10.251.3.127 |
| 29 | 10.251.3.128/27 | 10.251.3.129 – 10.251.3.158 | 10.251.3.159 |
| 30 | 10.251.3.160/27 | 10.251.3.161 – 10.251.3.190 | 10.251.3.191 |
| 31 | 10.251.3.192/27 | 10.251.3.193 – 10.251.3.222 | 10.251.3.223 |
| 32 | 10.251.3.224/27 | 10.251.3.225 – 10.251.3.254 | 10.251.3.255 |
| 33 | 10.251.4.0/27 | 10.251.4.1 – 10.251.4.30 | 10.251.4.31 |
| 34 | 10.251.4.32/27 | 10.251.4.33 – 10.251.4.62 | 10.251.4.63 |
| 35 | 10.251.4.64/27 | 10.251.4.65 – 10.251.4.94 | 10.251.4.95 |
| 36 | 10.251.4.96/27 | 10.251.4.97 – 10.251.4.126 | 10.251.4.127 |
| 37 | 10.251.4.128/27 | 10.251.4.129 – 10.251.4.158 | 10.251.4.159 |
| 38 | 10.251.4.160/27 | 10.251.4.161 – 10.251.4.190 | 10.251.4.191 |
| 39 | 10.251.4.192/27 | 10.251.4.193 – 10.251.4.222 | 10.251.4.223 |
| 40 | 10.251.4.224/27 | 10.251.4.225 – 10.251.4.254 | 10.251.4.255 |
| 41 | 10.251.5.0/27 | 10.251.5.1 – 10.251.5.30 | 10.251.5.31 |
| 42 | 10.251.5.32/27 | 10.251.5.33 – 10.251.5.62 | 10.251.5.63 |
| 43 | 10.251.5.64/27 | 10.251.5.65 – 10.251.5.94 | 10.251.5.95 |
| 44 | 10.251.5.96/27 | 10.251.5.97 – 10.251.5.126 | 10.251.5.127 |
| 45 | 10.251.5.128/27 | 10.251.5.129 – 10.251.5.158 | 10.251.5.159 |
| 46 | 10.251.5.160/27 | 10.251.5.161 – 10.251.5.190 | 10.251.5.191 |
| 47 | 10.251.5.192/27 | 10.251.5.193 – 10.251.5.222 | 10.251.5.223 |
| 48 | 10.251.5.224/27 | 10.251.5.225 – 10.251.5.254 | 10.251.5.255 |
| 49 | 10.251.6.0/27 | 10.251.6.1 – 10.251.6.30 | 10.251.6.31 |
| 50 | 10.251.6.32/27 | 10.251.6.33 – 10.251.6.62 | 10.251.6.63 |
| 51 | 10.251.6.64/27 | 10.251.6.65 – 10.251.6.94 | 10.251.6.95 |
| 52 | 10.251.6.96/27 | 10.251.6.97 – 10.251.6.126 | 10.251.6.127 |
| 53 | 10.251.6.128/27 | 10.251.6.129 – 10.251.6.158 | 10.251.6.159 |
| 54 | 10.251.6.160/27 | 10.251.6.161 – 10.251.6.190 | 10.251.6.191 |
| 55 | 10.251.6.192/27 | 10.251.6.193 – 10.251.6.222 | 10.251.6.223 |
| 56 | 10.251.6.224/27 | 10.251.6.225 – 10.251.6.254 | 10.251.6.255 |
| 57 | 10.251.7.0/27 | 10.251.7.1 – 10.251.7.30 | 10.251.7.31 |
| 58 | 10.251.7.32/27 | 10.251.7.33 – 10.251.7.62 | 10.251.7.63 |
| 59 | 10.251.7.64/27 | 10.251.7.65 – 10.251.7.94 | 10.251.7.95 |
| 60 | 10.251.7.96/27 | 10.251.7.97 – 10.251.7.126 | 10.251.7.127 |
| 61 | 10.251.7.128/27 | 10.251.7.129 – 10.251.7.158 | 10.251.7.159 |
| 62 | 10.251.7.160/27 | 10.251.7.161 – 10.251.7.190 | 10.251.7.191 |
| 63 | 10.251.7.192/27 | 10.251.7.193 – 10.251.7.222 | 10.251.7.223 |
| 64 | 10.251.7.224/27 | 10.251.7.225 – 10.251.7.254 | 10.251.7.255 |
| 65 | 10.251.8.0/27 | 10.251.8.1 – 10.251.8.30 | 10.251.8.31 |
| 66 | 10.251.8.32/27 | 10.251.8.33 – 10.251.8.62 | 10.251.8.63 |
| 67 | 10.251.8.64/27 | 10.251.8.65 – 10.251.8.94 | 10.251.8.95 |
| 68 | 10.251.8.96/27 | 10.251.8.97 – 10.251.8.126 | 10.251.8.127 |
| 69 | 10.251.8.128/27 | 10.251.8.129 – 10.251.8.158 | 10.251.8.159 |
| 70 | 10.251.8.160/27 | 10.251.8.161 – 10.251.8.190 | 10.251.8.191 |
| 71 | 10.251.8.192/27 | 10.251.8.193 – 10.251.8.222 | 10.251.8.223 |
| 72 | 10.251.8.224/27 | 10.251.8.225 – 10.251.8.254 | 10.251.8.255 |
| 73 | 10.251.9.0/27 | 10.251.9.1 – 10.251.9.30 | 10.251.9.31 |
| 74 | 10.251.9.32/27 | 10.251.9.33 – 10.251.9.62 | 10.251.9.63 |
| 75 | 10.251.9.64/27 | 10.251.9.65 – 10.251.9.94 | 10.251.9.95 |
| 76 | 10.251.9.96/27 | 10.251.9.97 – 10.251.9.126 | 10.251.9.127 |
| 77 | 10.251.9.128/27 | 10.251.9.129 – 10.251.9.158 | 10.251.9.159 |
| 78 | 10.251.9.160/27 | 10.251.9.161 – 10.251.9.190 | 10.251.9.191 |
| 79 | 10.251.9.192/27 | 10.251.9.193 – 10.251.9.222 | 10.251.9.223 |
| 80 | 10.251.9.224/27 | 10.251.9.225 – 10.251.9.254 | 10.251.9.255 |
| 81 | 10.251.10.0/27 | 10.251.10.1 – 10.251.10.30 | 10.251.10.31 |
| 82 | 10.251.10.32/27 | 10.251.10.33 – 10.251.10.62 | 10.251.10.63 |
| 83 | 10.251.10.64/27 | 10.251.10.65 – 10.251.10.94 | 10.251.10.95 |
| 84 | 10.251.10.96/27 | 10.251.10.97 – 10.251.10.126 | 10.251.10.127 |
| 85 | 10.251.10.128/27 | 10.251.10.129 – 10.251.10.158 | 10.251.10.159 |
| 86 | 10.251.10.160/27 | 10.251.10.161 – 10.251.10.190 | 10.251.10.191 |
| 87 | 10.251.10.192/27 | 10.251.10.193 – 10.251.10.222 | 10.251.10.223 |
| 88 | 10.251.10.224/27 | 10.251.10.225 – 10.251.10.254 | 10.251.10.255 |
| 89 | 10.251.11.0/27 | 10.251.11.1 – 10.251.11.30 | 10.251.11.31 |
| 90 | 10.251.11.32/27 | 10.251.11.33 – 10.251.11.62 | 10.251.11.63 |
| 91 | 10.251.11.64/27 | 10.251.11.65 – 10.251.11.94 | 10.251.11.95 |
| 92 | 10.251.11.96/27 | 10.251.11.97 – 10.251.11.126 | 10.251.11.127 |
| 93 | 10.251.11.128/27 | 10.251.11.129 – 10.251.11.158 | 10.251.11.159 |
| 94 | 10.251.11.160/27 | 10.251.11.161 – 10.251.11.190 | 10.251.11.191 |
| 95 | 10.251.11.192/27 | 10.251.11.193 – 10.251.11.222 | 10.251.11.223 |
| 96 | 10.251.11.224/27 | 10.251.11.225 – 10.251.11.254 | 10.251.11.255 |
| 97 | 10.251.12.0/27 | 10.251.12.1 – 10.251.12.30 | 10.251.12.31 |
| 98 | 10.251.12.32/27 | 10.251.12.33 – 10.251.12.62 | 10.251.12.63 |
| 99 | 10.251.12.64/27 | 10.251.12.65 – 10.251.12.94 | 10.251.12.95 |
| 100 | 10.251.12.96/27 | 10.251.12.97 – 10.251.12.126 | 10.251.12.127 |
| 101 | 10.251.12.128/27 | 10.251.12.129 – 10.251.12.158 | 10.251.12.159 |
| 102 | 10.251.12.160/27 | 10.251.12.161 – 10.251.12.190 | 10.251.12.191 |
| 103 | 10.251.12.192/27 | 10.251.12.193 – 10.251.12.222 | 10.251.12.223 |
| 104 | 10.251.12.224/27 | 10.251.12.225 – 10.251.12.254 | 10.251.12.255 |
| 105 | 10.251.13.0/27 | 10.251.13.1 – 10.251.13.30 | 10.251.13.31 |
| 106 | 10.251.13.32/27 | 10.251.13.33 – 10.251.13.62 | 10.251.13.63 |
| 107 | 10.251.13.64/27 | 10.251.13.65 – 10.251.13.94 | 10.251.13.95 |
| 108 | 10.251.13.96/27 | 10.251.13.97 – 10.251.13.126 | 10.251.13.127 |
| 109 | 10.251.13.128/27 | 10.251.13.129 – 10.251.13.158 | 10.251.13.159 |
| 110 | 10.251.13.160/27 | 10.251.13.161 – 10.251.13.190 | 10.251.13.191 |
| 111 | 10.251.13.192/27 | 10.251.13.193 – 10.251.13.222 | 10.251.13.223 |
| 112 | 10.251.13.224/27 | 10.251.13.225 – 10.251.13.254 | 10.251.13.255 |
| 113 | 10.251.14.0/27 | 10.251.14.1 – 10.251.14.30 | 10.251.14.31 |
| 114 | 10.251.14.32/27 | 10.251.14.33 – 10.251.14.62 | 10.251.14.63 |
| 115 | 10.251.14.64/27 | 10.251.14.65 – 10.251.14.94 | 10.251.14.95 |
| 116 | 10.251.14.96/27 | 10.251.14.97 – 10.251.14.126 | 10.251.14.127 |
| 117 | 10.251.14.128/27 | 10.251.14.129 – 10.251.14.158 | 10.251.14.159 |
| 118 | 10.251.14.160/27 | 10.251.14.161 – 10.251.14.190 | 10.251.14.191 |
| 119 | 10.251.14.192/27 | 10.251.14.193 – 10.251.14.222 | 10.251.14.223 |
| 120 | 10.251.14.224/27 | 10.251.14.225 – 10.251.14.254 | 10.251.14.255 |
| 121 | 10.251.15.0/27 | 10.251.15.1 – 10.251.15.30 | 10.251.15.31 |
| 122 | 10.251.15.32/27 | 10.251.15.33 – 10.251.15.62 | 10.251.15.63 |
| 123 | 10.251.15.64/27 | 10.251.15.65 – 10.251.15.94 | 10.251.15.95 |
| 124 | 10.251.15.96/27 | 10.251.15.97 – 10.251.15.126 | 10.251.15.127 |
| 125 | 10.251.15.128/27 | 10.251.15.129 – 10.251.15.158 | 10.251.15.159 |
| 126 | 10.251.15.160/27 | 10.251.15.161 – 10.251.15.190 | 10.251.15.191 |
| 127 | 10.251.15.192/27 | 10.251.15.193 – 10.251.15.222 | 10.251.15.223 |
| 128 | 10.251.15.224/27 | 10.251.15.225 – 10.251.15.254 | 10.251.15.255 |
| 129 | 10.251.16.0/27 | 10.251.16.1 – 10.251.16.30 | 10.251.16.31 |
| 130 | 10.251.16.32/27 | 10.251.16.33 – 10.251.16.62 | 10.251.16.63 |
| 131 | 10.251.16.64/27 | 10.251.16.65 – 10.251.16.94 | 10.251.16.95 |
| 132 | 10.251.16.96/27 | 10.251.16.97 – 10.251.16.126 | 10.251.16.127 |
| 133 | 10.251.16.128/27 | 10.251.16.129 – 10.251.16.158 | 10.251.16.159 |
| 134 | 10.251.16.160/27 | 10.251.16.161 – 10.251.16.190 | 10.251.16.191 |
| 135 | 10.251.16.192/27 | 10.251.16.193 – 10.251.16.222 | 10.251.16.223 |
| 136 | 10.251.16.224/27 | 10.251.16.225 – 10.251.16.254 | 10.251.16.255 |
| 137 | 10.251.17.0/27 | 10.251.17.1 – 10.251.17.30 | 10.251.17.31 |
| 138 | 10.251.17.32/27 | 10.251.17.33 – 10.251.17.62 | 10.251.17.63 |
| 139 | 10.251.17.64/27 | 10.251.17.65 – 10.251.17.94 | 10.251.17.95 |
| 140 | 10.251.17.96/27 | 10.251.17.97 – 10.251.17.126 | 10.251.17.127 |
| 141 | 10.251.17.128/27 | 10.251.17.129 – 10.251.17.158 | 10.251.17.159 |
| 142 | 10.251.17.160/27 | 10.251.17.161 – 10.251.17.190 | 10.251.17.191 |
| 143 | 10.251.17.192/27 | 10.251.17.193 – 10.251.17.222 | 10.251.17.223 |
| 144 | 10.251.17.224/27 | 10.251.17.225 – 10.251.17.254 | 10.251.17.255 |
| 145 | 10.251.18.0/27 | 10.251.18.1 – 10.251.18.30 | 10.251.18.31 |
| 146 | 10.251.18.32/27 | 10.251.18.33 – 10.251.18.62 | 10.251.18.63 |
| 147 | 10.251.18.64/27 | 10.251.18.65 – 10.251.18.94 | 10.251.18.95 |
| 148 | 10.251.18.96/27 | 10.251.18.97 – 10.251.18.126 | 10.251.18.127 |
| 149 | 10.251.18.128/27 | 10.251.18.129 – 10.251.18.158 | 10.251.18.159 |
| 150 | 10.251.18.160/27 | 10.251.18.161 – 10.251.18.190 | 10.251.18.191 |
| 151 | 10.251.18.192/27 | 10.251.18.193 – 10.251.18.222 | 10.251.18.223 |
| 152 | 10.251.18.224/27 | 10.251.18.225 – 10.251.18.254 | 10.251.18.255 |
| 153 | 10.251.19.0/27 | 10.251.19.1 – 10.251.19.30 | 10.251.19.31 |
| 154 | 10.251.19.32/27 | 10.251.19.33 – 10.251.19.62 | 10.251.19.63 |
| 155 | 10.251.19.64/27 | 10.251.19.65 – 10.251.19.94 | 10.251.19.95 |
| 156 | 10.251.19.96/27 | 10.251.19.97 – 10.251.19.126 | 10.251.19.127 |
| 157 | 10.251.19.128/27 | 10.251.19.129 – 10.251.19.158 | 10.251.19.159 |
| 158 | 10.251.19.160/27 | 10.251.19.161 – 10.251.19.190 | 10.251.19.191 |
| 159 | 10.251.19.192/27 | 10.251.19.193 – 10.251.19.222 | 10.251.19.223 |
| 160 | 10.251.19.224/27 | 10.251.19.225 – 10.251.19.254 | 10.251.19.255 |
| 161 | 10.251.20.0/27 | 10.251.20.1 – 10.251.20.30 | 10.251.20.31 |
| 162 | 10.251.20.32/27 | 10.251.20.33 – 10.251.20.62 | 10.251.20.63 |
| 163 | 10.251.20.64/27 | 10.251.20.65 – 10.251.20.94 | 10.251.20.95 |
| 164 | 10.251.20.96/27 | 10.251.20.97 – 10.251.20.126 | 10.251.20.127 |
| 165 | 10.251.20.128/27 | 10.251.20.129 – 10.251.20.158 | 10.251.20.159 |
| 166 | 10.251.20.160/27 | 10.251.20.161 – 10.251.20.190 | 10.251.20.191 |
| 167 | 10.251.20.192/27 | 10.251.20.193 – 10.251.20.222 | 10.251.20.223 |
| 168 | 10.251.20.224/27 | 10.251.20.225 – 10.251.20.254 | 10.251.20.255 |
| 169 | 10.251.21.0/27 | 10.251.21.1 – 10.251.21.30 | 10.251.21.31 |
| 170 | 10.251.21.32/27 | 10.251.21.33 – 10.251.21.62 | 10.251.21.63 |
| 171 | 10.251.21.64/27 | 10.251.21.65 – 10.251.21.94 | 10.251.21.95 |
| 172 | 10.251.21.96/27 | 10.251.21.97 – 10.251.21.126 | 10.251.21.127 |
| 173 | 10.251.21.128/27 | 10.251.21.129 – 10.251.21.158 | 10.251.21.159 |
| 174 | 10.251.21.160/27 | 10.251.21.161 – 10.251.21.190 | 10.251.21.191 |
| 175 | 10.251.21.192/27 | 10.251.21.193 – 10.251.21.222 | 10.251.21.223 |
| 176 | 10.251.21.224/27 | 10.251.21.225 – 10.251.21.254 | 10.251.21.255 |
| 177 | 10.251.22.0/27 | 10.251.22.1 – 10.251.22.30 | 10.251.22.31 |
| 178 | 10.251.22.32/27 | 10.251.22.33 – 10.251.22.62 | 10.251.22.63 |
| 179 | 10.251.22.64/27 | 10.251.22.65 – 10.251.22.94 | 10.251.22.95 |
| 180 | 10.251.22.96/27 | 10.251.22.97 – 10.251.22.126 | 10.251.22.127 |
| 181 | 10.251.22.128/27 | 10.251.22.129 – 10.251.22.158 | 10.251.22.159 |
| 182 | 10.251.22.160/27 | 10.251.22.161 – 10.251.22.190 | 10.251.22.191 |
| 183 | 10.251.22.192/27 | 10.251.22.193 – 10.251.22.222 | 10.251.22.223 |
| 184 | 10.251.22.224/27 | 10.251.22.225 – 10.251.22.254 | 10.251.22.255 |
| 185 | 10.251.23.0/27 | 10.251.23.1 – 10.251.23.30 | 10.251.23.31 |
| 186 | 10.251.23.32/27 | 10.251.23.33 – 10.251.23.62 | 10.251.23.63 |
| 187 | 10.251.23.64/27 | 10.251.23.65 – 10.251.23.94 | 10.251.23.95 |
| 188 | 10.251.23.96/27 | 10.251.23.97 – 10.251.23.126 | 10.251.23.127 |
| 189 | 10.251.23.128/27 | 10.251.23.129 – 10.251.23.158 | 10.251.23.159 |
| 190 | 10.251.23.160/27 | 10.251.23.161 – 10.251.23.190 | 10.251.23.191 |
| 191 | 10.251.23.192/27 | 10.251.23.193 – 10.251.23.222 | 10.251.23.223 |
| 192 | 10.251.23.224/27 | 10.251.23.225 – 10.251.23.254 | 10.251.23.255 |
| 193 | 10.251.24.0/27 | 10.251.24.1 – 10.251.24.30 | 10.251.24.31 |
| 194 | 10.251.24.32/27 | 10.251.24.33 – 10.251.24.62 | 10.251.24.63 |
| 195 | 10.251.24.64/27 | 10.251.24.65 – 10.251.24.94 | 10.251.24.95 |
| 196 | 10.251.24.96/27 | 10.251.24.97 – 10.251.24.126 | 10.251.24.127 |
| 197 | 10.251.24.128/27 | 10.251.24.129 – 10.251.24.158 | 10.251.24.159 |
| 198 | 10.251.24.160/27 | 10.251.24.161 – 10.251.24.190 | 10.251.24.191 |
| 199 | 10.251.24.192/27 | 10.251.24.193 – 10.251.24.222 | 10.251.24.223 |
| 200 | 10.251.24.224/27 | 10.251.24.225 – 10.251.24.254 | 10.251.24.255 |
| 201 | 10.251.25.0/27 | 10.251.25.1 – 10.251.25.30 | 10.251.25.31 |
| 202 | 10.251.25.32/27 | 10.251.25.33 – 10.251.25.62 | 10.251.25.63 |
| 203 | 10.251.25.64/27 | 10.251.25.65 – 10.251.25.94 | 10.251.25.95 |
| 204 | 10.251.25.96/27 | 10.251.25.97 – 10.251.25.126 | 10.251.25.127 |
| 205 | 10.251.25.128/27 | 10.251.25.129 – 10.251.25.158 | 10.251.25.159 |
| 206 | 10.251.25.160/27 | 10.251.25.161 – 10.251.25.190 | 10.251.25.191 |
| 207 | 10.251.25.192/27 | 10.251.25.193 – 10.251.25.222 | 10.251.25.223 |
| 208 | 10.251.25.224/27 | 10.251.25.225 – 10.251.25.254 | 10.251.25.255 |
| 209 | 10.251.26.0/27 | 10.251.26.1 – 10.251.26.30 | 10.251.26.31 |
| 210 | 10.251.26.32/27 | 10.251.26.33 – 10.251.26.62 | 10.251.26.63 |
| 211 | 10.251.26.64/27 | 10.251.26.65 – 10.251.26.94 | 10.251.26.95 |
| 212 | 10.251.26.96/27 | 10.251.26.97 – 10.251.26.126 | 10.251.26.127 |
| 213 | 10.251.26.128/27 | 10.251.26.129 – 10.251.26.158 | 10.251.26.159 |
| 214 | 10.251.26.160/27 | 10.251.26.161 – 10.251.26.190 | 10.251.26.191 |
| 215 | 10.251.26.192/27 | 10.251.26.193 – 10.251.26.222 | 10.251.26.223 |
| 216 | 10.251.26.224/27 | 10.251.26.225 – 10.251.26.254 | 10.251.26.255 |
| 217 | 10.251.27.0/27 | 10.251.27.1 – 10.251.27.30 | 10.251.27.31 |
| 218 | 10.251.27.32/27 | 10.251.27.33 – 10.251.27.62 | 10.251.27.63 |
| 219 | 10.251.27.64/27 | 10.251.27.65 – 10.251.27.94 | 10.251.27.95 |
| 220 | 10.251.27.96/27 | 10.251.27.97 – 10.251.27.126 | 10.251.27.127 |
| 221 | 10.251.27.128/27 | 10.251.27.129 – 10.251.27.158 | 10.251.27.159 |
| 222 | 10.251.27.160/27 | 10.251.27.161 – 10.251.27.190 | 10.251.27.191 |
| 223 | 10.251.27.192/27 | 10.251.27.193 – 10.251.27.222 | 10.251.27.223 |
| 224 | 10.251.27.224/27 | 10.251.27.225 – 10.251.27.254 | 10.251.27.255 |
| 225 | 10.251.28.0/27 | 10.251.28.1 – 10.251.28.30 | 10.251.28.31 |
| 226 | 10.251.28.32/27 | 10.251.28.33 – 10.251.28.62 | 10.251.28.63 |
| 227 | 10.251.28.64/27 | 10.251.28.65 – 10.251.28.94 | 10.251.28.95 |
| 228 | 10.251.28.96/27 | 10.251.28.97 – 10.251.28.126 | 10.251.28.127 |
| 229 | 10.251.28.128/27 | 10.251.28.129 – 10.251.28.158 | 10.251.28.159 |
| 230 | 10.251.28.160/27 | 10.251.28.161 – 10.251.28.190 | 10.251.28.191 |
| 231 | 10.251.28.192/27 | 10.251.28.193 – 10.251.28.222 | 10.251.28.223 |
| 232 | 10.251.28.224/27 | 10.251.28.225 – 10.251.28.254 | 10.251.28.255 |
| 233 | 10.251.29.0/27 | 10.251.29.1 – 10.251.29.30 | 10.251.29.31 |
| 234 | 10.251.29.32/27 | 10.251.29.33 – 10.251.29.62 | 10.251.29.63 |
| 235 | 10.251.29.64/27 | 10.251.29.65 – 10.251.29.94 | 10.251.29.95 |
| 236 | 10.251.29.96/27 | 10.251.29.97 – 10.251.29.126 | 10.251.29.127 |
| 237 | 10.251.29.128/27 | 10.251.29.129 – 10.251.29.158 | 10.251.29.159 |
| 238 | 10.251.29.160/27 | 10.251.29.161 – 10.251.29.190 | 10.251.29.191 |
| 239 | 10.251.29.192/27 | 10.251.29.193 – 10.251.29.222 | 10.251.29.223 |
| 240 | 10.251.29.224/27 | 10.251.29.225 – 10.251.29.254 | 10.251.29.255 |
| 241 | 10.251.30.0/27 | 10.251.30.1 – 10.251.30.30 | 10.251.30.31 |
| 242 | 10.251.30.32/27 | 10.251.30.33 – 10.251.30.62 | 10.251.30.63 |
| 243 | 10.251.30.64/27 | 10.251.30.65 – 10.251.30.94 | 10.251.30.95 |
| 244 | 10.251.30.96/27 | 10.251.30.97 – 10.251.30.126 | 10.251.30.127 |
| 245 | 10.251.30.128/27 | 10.251.30.129 – 10.251.30.158 | 10.251.30.159 |
| 246 | 10.251.30.160/27 | 10.251.30.161 – 10.251.30.190 | 10.251.30.191 |
| 247 | 10.251.30.192/27 | 10.251.30.193 – 10.251.30.222 | 10.251.30.223 |
| 248 | 10.251.30.224/27 | 10.251.30.225 – 10.251.30.254 | 10.251.30.255 |
| 249 | 10.251.31.0/27 | 10.251.31.1 – 10.251.31.30 | 10.251.31.31 |
| 250 | 10.251.31.32/27 | 10.251.31.33 – 10.251.31.62 | 10.251.31.63 |
| 251 | 10.251.31.64/27 | 10.251.31.65 – 10.251.31.94 | 10.251.31.95 |
| 252 | 10.251.31.96/27 | 10.251.31.97 – 10.251.31.126 | 10.251.31.127 |
| 253 | 10.251.31.128/27 | 10.251.31.129 – 10.251.31.158 | 10.251.31.159 |
| 254 | 10.251.31.160/27 | 10.251.31.161 – 10.251.31.190 | 10.251.31.191 |
| 255 | 10.251.31.192/27 | 10.251.31.193 – 10.251.31.222 | 10.251.31.223 |
| 256 | 10.251.31.224/27 | 10.251.31.225 – 10.251.31.254 | 10.251.31.255 |
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.