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)10.121.0.0/16
network10.121.0.0/16
broadcast10.121.255.255
first host10.121.0.1
last host10.121.255.254
subnet mask255.255.0.0
wildcard0.0.255.255
addresses65,536
usable hosts65,534
classA
ipcalc 10.121.0.0/16
address00001010.01111001.00000000.00000000
subnet mask11111111.11111111.00000000.00000000
network00001010.01111001.00000000.00000000
broadcast00001010.01111001.11111111.11111111
green = network part, grey = host part
hex0x0a790000
decimal175702016
reverse dns0.0.121.10.in-addr.arpa
ipv4-mapped::ffff:a79:0
/16 split into /28 · 4,096 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.121.0.0/28 | 10.121.0.1 – 10.121.0.14 | 10.121.0.15 |
| 2 | 10.121.0.16/28 | 10.121.0.17 – 10.121.0.30 | 10.121.0.31 |
| 3 | 10.121.0.32/28 | 10.121.0.33 – 10.121.0.46 | 10.121.0.47 |
| 4 | 10.121.0.48/28 | 10.121.0.49 – 10.121.0.62 | 10.121.0.63 |
| 5 | 10.121.0.64/28 | 10.121.0.65 – 10.121.0.78 | 10.121.0.79 |
| 6 | 10.121.0.80/28 | 10.121.0.81 – 10.121.0.94 | 10.121.0.95 |
| 7 | 10.121.0.96/28 | 10.121.0.97 – 10.121.0.110 | 10.121.0.111 |
| 8 | 10.121.0.112/28 | 10.121.0.113 – 10.121.0.126 | 10.121.0.127 |
| 9 | 10.121.0.128/28 | 10.121.0.129 – 10.121.0.142 | 10.121.0.143 |
| 10 | 10.121.0.144/28 | 10.121.0.145 – 10.121.0.158 | 10.121.0.159 |
| 11 | 10.121.0.160/28 | 10.121.0.161 – 10.121.0.174 | 10.121.0.175 |
| 12 | 10.121.0.176/28 | 10.121.0.177 – 10.121.0.190 | 10.121.0.191 |
| 13 | 10.121.0.192/28 | 10.121.0.193 – 10.121.0.206 | 10.121.0.207 |
| 14 | 10.121.0.208/28 | 10.121.0.209 – 10.121.0.222 | 10.121.0.223 |
| 15 | 10.121.0.224/28 | 10.121.0.225 – 10.121.0.238 | 10.121.0.239 |
| 16 | 10.121.0.240/28 | 10.121.0.241 – 10.121.0.254 | 10.121.0.255 |
| 17 | 10.121.1.0/28 | 10.121.1.1 – 10.121.1.14 | 10.121.1.15 |
| 18 | 10.121.1.16/28 | 10.121.1.17 – 10.121.1.30 | 10.121.1.31 |
| 19 | 10.121.1.32/28 | 10.121.1.33 – 10.121.1.46 | 10.121.1.47 |
| 20 | 10.121.1.48/28 | 10.121.1.49 – 10.121.1.62 | 10.121.1.63 |
| 21 | 10.121.1.64/28 | 10.121.1.65 – 10.121.1.78 | 10.121.1.79 |
| 22 | 10.121.1.80/28 | 10.121.1.81 – 10.121.1.94 | 10.121.1.95 |
| 23 | 10.121.1.96/28 | 10.121.1.97 – 10.121.1.110 | 10.121.1.111 |
| 24 | 10.121.1.112/28 | 10.121.1.113 – 10.121.1.126 | 10.121.1.127 |
| 25 | 10.121.1.128/28 | 10.121.1.129 – 10.121.1.142 | 10.121.1.143 |
| 26 | 10.121.1.144/28 | 10.121.1.145 – 10.121.1.158 | 10.121.1.159 |
| 27 | 10.121.1.160/28 | 10.121.1.161 – 10.121.1.174 | 10.121.1.175 |
| 28 | 10.121.1.176/28 | 10.121.1.177 – 10.121.1.190 | 10.121.1.191 |
| 29 | 10.121.1.192/28 | 10.121.1.193 – 10.121.1.206 | 10.121.1.207 |
| 30 | 10.121.1.208/28 | 10.121.1.209 – 10.121.1.222 | 10.121.1.223 |
| 31 | 10.121.1.224/28 | 10.121.1.225 – 10.121.1.238 | 10.121.1.239 |
| 32 | 10.121.1.240/28 | 10.121.1.241 – 10.121.1.254 | 10.121.1.255 |
| 33 | 10.121.2.0/28 | 10.121.2.1 – 10.121.2.14 | 10.121.2.15 |
| 34 | 10.121.2.16/28 | 10.121.2.17 – 10.121.2.30 | 10.121.2.31 |
| 35 | 10.121.2.32/28 | 10.121.2.33 – 10.121.2.46 | 10.121.2.47 |
| 36 | 10.121.2.48/28 | 10.121.2.49 – 10.121.2.62 | 10.121.2.63 |
| 37 | 10.121.2.64/28 | 10.121.2.65 – 10.121.2.78 | 10.121.2.79 |
| 38 | 10.121.2.80/28 | 10.121.2.81 – 10.121.2.94 | 10.121.2.95 |
| 39 | 10.121.2.96/28 | 10.121.2.97 – 10.121.2.110 | 10.121.2.111 |
| 40 | 10.121.2.112/28 | 10.121.2.113 – 10.121.2.126 | 10.121.2.127 |
| 41 | 10.121.2.128/28 | 10.121.2.129 – 10.121.2.142 | 10.121.2.143 |
| 42 | 10.121.2.144/28 | 10.121.2.145 – 10.121.2.158 | 10.121.2.159 |
| 43 | 10.121.2.160/28 | 10.121.2.161 – 10.121.2.174 | 10.121.2.175 |
| 44 | 10.121.2.176/28 | 10.121.2.177 – 10.121.2.190 | 10.121.2.191 |
| 45 | 10.121.2.192/28 | 10.121.2.193 – 10.121.2.206 | 10.121.2.207 |
| 46 | 10.121.2.208/28 | 10.121.2.209 – 10.121.2.222 | 10.121.2.223 |
| 47 | 10.121.2.224/28 | 10.121.2.225 – 10.121.2.238 | 10.121.2.239 |
| 48 | 10.121.2.240/28 | 10.121.2.241 – 10.121.2.254 | 10.121.2.255 |
| 49 | 10.121.3.0/28 | 10.121.3.1 – 10.121.3.14 | 10.121.3.15 |
| 50 | 10.121.3.16/28 | 10.121.3.17 – 10.121.3.30 | 10.121.3.31 |
| 51 | 10.121.3.32/28 | 10.121.3.33 – 10.121.3.46 | 10.121.3.47 |
| 52 | 10.121.3.48/28 | 10.121.3.49 – 10.121.3.62 | 10.121.3.63 |
| 53 | 10.121.3.64/28 | 10.121.3.65 – 10.121.3.78 | 10.121.3.79 |
| 54 | 10.121.3.80/28 | 10.121.3.81 – 10.121.3.94 | 10.121.3.95 |
| 55 | 10.121.3.96/28 | 10.121.3.97 – 10.121.3.110 | 10.121.3.111 |
| 56 | 10.121.3.112/28 | 10.121.3.113 – 10.121.3.126 | 10.121.3.127 |
| 57 | 10.121.3.128/28 | 10.121.3.129 – 10.121.3.142 | 10.121.3.143 |
| 58 | 10.121.3.144/28 | 10.121.3.145 – 10.121.3.158 | 10.121.3.159 |
| 59 | 10.121.3.160/28 | 10.121.3.161 – 10.121.3.174 | 10.121.3.175 |
| 60 | 10.121.3.176/28 | 10.121.3.177 – 10.121.3.190 | 10.121.3.191 |
| 61 | 10.121.3.192/28 | 10.121.3.193 – 10.121.3.206 | 10.121.3.207 |
| 62 | 10.121.3.208/28 | 10.121.3.209 – 10.121.3.222 | 10.121.3.223 |
| 63 | 10.121.3.224/28 | 10.121.3.225 – 10.121.3.238 | 10.121.3.239 |
| 64 | 10.121.3.240/28 | 10.121.3.241 – 10.121.3.254 | 10.121.3.255 |
| 65 | 10.121.4.0/28 | 10.121.4.1 – 10.121.4.14 | 10.121.4.15 |
| 66 | 10.121.4.16/28 | 10.121.4.17 – 10.121.4.30 | 10.121.4.31 |
| 67 | 10.121.4.32/28 | 10.121.4.33 – 10.121.4.46 | 10.121.4.47 |
| 68 | 10.121.4.48/28 | 10.121.4.49 – 10.121.4.62 | 10.121.4.63 |
| 69 | 10.121.4.64/28 | 10.121.4.65 – 10.121.4.78 | 10.121.4.79 |
| 70 | 10.121.4.80/28 | 10.121.4.81 – 10.121.4.94 | 10.121.4.95 |
| 71 | 10.121.4.96/28 | 10.121.4.97 – 10.121.4.110 | 10.121.4.111 |
| 72 | 10.121.4.112/28 | 10.121.4.113 – 10.121.4.126 | 10.121.4.127 |
| 73 | 10.121.4.128/28 | 10.121.4.129 – 10.121.4.142 | 10.121.4.143 |
| 74 | 10.121.4.144/28 | 10.121.4.145 – 10.121.4.158 | 10.121.4.159 |
| 75 | 10.121.4.160/28 | 10.121.4.161 – 10.121.4.174 | 10.121.4.175 |
| 76 | 10.121.4.176/28 | 10.121.4.177 – 10.121.4.190 | 10.121.4.191 |
| 77 | 10.121.4.192/28 | 10.121.4.193 – 10.121.4.206 | 10.121.4.207 |
| 78 | 10.121.4.208/28 | 10.121.4.209 – 10.121.4.222 | 10.121.4.223 |
| 79 | 10.121.4.224/28 | 10.121.4.225 – 10.121.4.238 | 10.121.4.239 |
| 80 | 10.121.4.240/28 | 10.121.4.241 – 10.121.4.254 | 10.121.4.255 |
| 81 | 10.121.5.0/28 | 10.121.5.1 – 10.121.5.14 | 10.121.5.15 |
| 82 | 10.121.5.16/28 | 10.121.5.17 – 10.121.5.30 | 10.121.5.31 |
| 83 | 10.121.5.32/28 | 10.121.5.33 – 10.121.5.46 | 10.121.5.47 |
| 84 | 10.121.5.48/28 | 10.121.5.49 – 10.121.5.62 | 10.121.5.63 |
| 85 | 10.121.5.64/28 | 10.121.5.65 – 10.121.5.78 | 10.121.5.79 |
| 86 | 10.121.5.80/28 | 10.121.5.81 – 10.121.5.94 | 10.121.5.95 |
| 87 | 10.121.5.96/28 | 10.121.5.97 – 10.121.5.110 | 10.121.5.111 |
| 88 | 10.121.5.112/28 | 10.121.5.113 – 10.121.5.126 | 10.121.5.127 |
| 89 | 10.121.5.128/28 | 10.121.5.129 – 10.121.5.142 | 10.121.5.143 |
| 90 | 10.121.5.144/28 | 10.121.5.145 – 10.121.5.158 | 10.121.5.159 |
| 91 | 10.121.5.160/28 | 10.121.5.161 – 10.121.5.174 | 10.121.5.175 |
| 92 | 10.121.5.176/28 | 10.121.5.177 – 10.121.5.190 | 10.121.5.191 |
| 93 | 10.121.5.192/28 | 10.121.5.193 – 10.121.5.206 | 10.121.5.207 |
| 94 | 10.121.5.208/28 | 10.121.5.209 – 10.121.5.222 | 10.121.5.223 |
| 95 | 10.121.5.224/28 | 10.121.5.225 – 10.121.5.238 | 10.121.5.239 |
| 96 | 10.121.5.240/28 | 10.121.5.241 – 10.121.5.254 | 10.121.5.255 |
| 97 | 10.121.6.0/28 | 10.121.6.1 – 10.121.6.14 | 10.121.6.15 |
| 98 | 10.121.6.16/28 | 10.121.6.17 – 10.121.6.30 | 10.121.6.31 |
| 99 | 10.121.6.32/28 | 10.121.6.33 – 10.121.6.46 | 10.121.6.47 |
| 100 | 10.121.6.48/28 | 10.121.6.49 – 10.121.6.62 | 10.121.6.63 |
| 101 | 10.121.6.64/28 | 10.121.6.65 – 10.121.6.78 | 10.121.6.79 |
| 102 | 10.121.6.80/28 | 10.121.6.81 – 10.121.6.94 | 10.121.6.95 |
| 103 | 10.121.6.96/28 | 10.121.6.97 – 10.121.6.110 | 10.121.6.111 |
| 104 | 10.121.6.112/28 | 10.121.6.113 – 10.121.6.126 | 10.121.6.127 |
| 105 | 10.121.6.128/28 | 10.121.6.129 – 10.121.6.142 | 10.121.6.143 |
| 106 | 10.121.6.144/28 | 10.121.6.145 – 10.121.6.158 | 10.121.6.159 |
| 107 | 10.121.6.160/28 | 10.121.6.161 – 10.121.6.174 | 10.121.6.175 |
| 108 | 10.121.6.176/28 | 10.121.6.177 – 10.121.6.190 | 10.121.6.191 |
| 109 | 10.121.6.192/28 | 10.121.6.193 – 10.121.6.206 | 10.121.6.207 |
| 110 | 10.121.6.208/28 | 10.121.6.209 – 10.121.6.222 | 10.121.6.223 |
| 111 | 10.121.6.224/28 | 10.121.6.225 – 10.121.6.238 | 10.121.6.239 |
| 112 | 10.121.6.240/28 | 10.121.6.241 – 10.121.6.254 | 10.121.6.255 |
| 113 | 10.121.7.0/28 | 10.121.7.1 – 10.121.7.14 | 10.121.7.15 |
| 114 | 10.121.7.16/28 | 10.121.7.17 – 10.121.7.30 | 10.121.7.31 |
| 115 | 10.121.7.32/28 | 10.121.7.33 – 10.121.7.46 | 10.121.7.47 |
| 116 | 10.121.7.48/28 | 10.121.7.49 – 10.121.7.62 | 10.121.7.63 |
| 117 | 10.121.7.64/28 | 10.121.7.65 – 10.121.7.78 | 10.121.7.79 |
| 118 | 10.121.7.80/28 | 10.121.7.81 – 10.121.7.94 | 10.121.7.95 |
| 119 | 10.121.7.96/28 | 10.121.7.97 – 10.121.7.110 | 10.121.7.111 |
| 120 | 10.121.7.112/28 | 10.121.7.113 – 10.121.7.126 | 10.121.7.127 |
| 121 | 10.121.7.128/28 | 10.121.7.129 – 10.121.7.142 | 10.121.7.143 |
| 122 | 10.121.7.144/28 | 10.121.7.145 – 10.121.7.158 | 10.121.7.159 |
| 123 | 10.121.7.160/28 | 10.121.7.161 – 10.121.7.174 | 10.121.7.175 |
| 124 | 10.121.7.176/28 | 10.121.7.177 – 10.121.7.190 | 10.121.7.191 |
| 125 | 10.121.7.192/28 | 10.121.7.193 – 10.121.7.206 | 10.121.7.207 |
| 126 | 10.121.7.208/28 | 10.121.7.209 – 10.121.7.222 | 10.121.7.223 |
| 127 | 10.121.7.224/28 | 10.121.7.225 – 10.121.7.238 | 10.121.7.239 |
| 128 | 10.121.7.240/28 | 10.121.7.241 – 10.121.7.254 | 10.121.7.255 |
| 129 | 10.121.8.0/28 | 10.121.8.1 – 10.121.8.14 | 10.121.8.15 |
| 130 | 10.121.8.16/28 | 10.121.8.17 – 10.121.8.30 | 10.121.8.31 |
| 131 | 10.121.8.32/28 | 10.121.8.33 – 10.121.8.46 | 10.121.8.47 |
| 132 | 10.121.8.48/28 | 10.121.8.49 – 10.121.8.62 | 10.121.8.63 |
| 133 | 10.121.8.64/28 | 10.121.8.65 – 10.121.8.78 | 10.121.8.79 |
| 134 | 10.121.8.80/28 | 10.121.8.81 – 10.121.8.94 | 10.121.8.95 |
| 135 | 10.121.8.96/28 | 10.121.8.97 – 10.121.8.110 | 10.121.8.111 |
| 136 | 10.121.8.112/28 | 10.121.8.113 – 10.121.8.126 | 10.121.8.127 |
| 137 | 10.121.8.128/28 | 10.121.8.129 – 10.121.8.142 | 10.121.8.143 |
| 138 | 10.121.8.144/28 | 10.121.8.145 – 10.121.8.158 | 10.121.8.159 |
| 139 | 10.121.8.160/28 | 10.121.8.161 – 10.121.8.174 | 10.121.8.175 |
| 140 | 10.121.8.176/28 | 10.121.8.177 – 10.121.8.190 | 10.121.8.191 |
| 141 | 10.121.8.192/28 | 10.121.8.193 – 10.121.8.206 | 10.121.8.207 |
| 142 | 10.121.8.208/28 | 10.121.8.209 – 10.121.8.222 | 10.121.8.223 |
| 143 | 10.121.8.224/28 | 10.121.8.225 – 10.121.8.238 | 10.121.8.239 |
| 144 | 10.121.8.240/28 | 10.121.8.241 – 10.121.8.254 | 10.121.8.255 |
| 145 | 10.121.9.0/28 | 10.121.9.1 – 10.121.9.14 | 10.121.9.15 |
| 146 | 10.121.9.16/28 | 10.121.9.17 – 10.121.9.30 | 10.121.9.31 |
| 147 | 10.121.9.32/28 | 10.121.9.33 – 10.121.9.46 | 10.121.9.47 |
| 148 | 10.121.9.48/28 | 10.121.9.49 – 10.121.9.62 | 10.121.9.63 |
| 149 | 10.121.9.64/28 | 10.121.9.65 – 10.121.9.78 | 10.121.9.79 |
| 150 | 10.121.9.80/28 | 10.121.9.81 – 10.121.9.94 | 10.121.9.95 |
| 151 | 10.121.9.96/28 | 10.121.9.97 – 10.121.9.110 | 10.121.9.111 |
| 152 | 10.121.9.112/28 | 10.121.9.113 – 10.121.9.126 | 10.121.9.127 |
| 153 | 10.121.9.128/28 | 10.121.9.129 – 10.121.9.142 | 10.121.9.143 |
| 154 | 10.121.9.144/28 | 10.121.9.145 – 10.121.9.158 | 10.121.9.159 |
| 155 | 10.121.9.160/28 | 10.121.9.161 – 10.121.9.174 | 10.121.9.175 |
| 156 | 10.121.9.176/28 | 10.121.9.177 – 10.121.9.190 | 10.121.9.191 |
| 157 | 10.121.9.192/28 | 10.121.9.193 – 10.121.9.206 | 10.121.9.207 |
| 158 | 10.121.9.208/28 | 10.121.9.209 – 10.121.9.222 | 10.121.9.223 |
| 159 | 10.121.9.224/28 | 10.121.9.225 – 10.121.9.238 | 10.121.9.239 |
| 160 | 10.121.9.240/28 | 10.121.9.241 – 10.121.9.254 | 10.121.9.255 |
| 161 | 10.121.10.0/28 | 10.121.10.1 – 10.121.10.14 | 10.121.10.15 |
| 162 | 10.121.10.16/28 | 10.121.10.17 – 10.121.10.30 | 10.121.10.31 |
| 163 | 10.121.10.32/28 | 10.121.10.33 – 10.121.10.46 | 10.121.10.47 |
| 164 | 10.121.10.48/28 | 10.121.10.49 – 10.121.10.62 | 10.121.10.63 |
| 165 | 10.121.10.64/28 | 10.121.10.65 – 10.121.10.78 | 10.121.10.79 |
| 166 | 10.121.10.80/28 | 10.121.10.81 – 10.121.10.94 | 10.121.10.95 |
| 167 | 10.121.10.96/28 | 10.121.10.97 – 10.121.10.110 | 10.121.10.111 |
| 168 | 10.121.10.112/28 | 10.121.10.113 – 10.121.10.126 | 10.121.10.127 |
| 169 | 10.121.10.128/28 | 10.121.10.129 – 10.121.10.142 | 10.121.10.143 |
| 170 | 10.121.10.144/28 | 10.121.10.145 – 10.121.10.158 | 10.121.10.159 |
| 171 | 10.121.10.160/28 | 10.121.10.161 – 10.121.10.174 | 10.121.10.175 |
| 172 | 10.121.10.176/28 | 10.121.10.177 – 10.121.10.190 | 10.121.10.191 |
| 173 | 10.121.10.192/28 | 10.121.10.193 – 10.121.10.206 | 10.121.10.207 |
| 174 | 10.121.10.208/28 | 10.121.10.209 – 10.121.10.222 | 10.121.10.223 |
| 175 | 10.121.10.224/28 | 10.121.10.225 – 10.121.10.238 | 10.121.10.239 |
| 176 | 10.121.10.240/28 | 10.121.10.241 – 10.121.10.254 | 10.121.10.255 |
| 177 | 10.121.11.0/28 | 10.121.11.1 – 10.121.11.14 | 10.121.11.15 |
| 178 | 10.121.11.16/28 | 10.121.11.17 – 10.121.11.30 | 10.121.11.31 |
| 179 | 10.121.11.32/28 | 10.121.11.33 – 10.121.11.46 | 10.121.11.47 |
| 180 | 10.121.11.48/28 | 10.121.11.49 – 10.121.11.62 | 10.121.11.63 |
| 181 | 10.121.11.64/28 | 10.121.11.65 – 10.121.11.78 | 10.121.11.79 |
| 182 | 10.121.11.80/28 | 10.121.11.81 – 10.121.11.94 | 10.121.11.95 |
| 183 | 10.121.11.96/28 | 10.121.11.97 – 10.121.11.110 | 10.121.11.111 |
| 184 | 10.121.11.112/28 | 10.121.11.113 – 10.121.11.126 | 10.121.11.127 |
| 185 | 10.121.11.128/28 | 10.121.11.129 – 10.121.11.142 | 10.121.11.143 |
| 186 | 10.121.11.144/28 | 10.121.11.145 – 10.121.11.158 | 10.121.11.159 |
| 187 | 10.121.11.160/28 | 10.121.11.161 – 10.121.11.174 | 10.121.11.175 |
| 188 | 10.121.11.176/28 | 10.121.11.177 – 10.121.11.190 | 10.121.11.191 |
| 189 | 10.121.11.192/28 | 10.121.11.193 – 10.121.11.206 | 10.121.11.207 |
| 190 | 10.121.11.208/28 | 10.121.11.209 – 10.121.11.222 | 10.121.11.223 |
| 191 | 10.121.11.224/28 | 10.121.11.225 – 10.121.11.238 | 10.121.11.239 |
| 192 | 10.121.11.240/28 | 10.121.11.241 – 10.121.11.254 | 10.121.11.255 |
| 193 | 10.121.12.0/28 | 10.121.12.1 – 10.121.12.14 | 10.121.12.15 |
| 194 | 10.121.12.16/28 | 10.121.12.17 – 10.121.12.30 | 10.121.12.31 |
| 195 | 10.121.12.32/28 | 10.121.12.33 – 10.121.12.46 | 10.121.12.47 |
| 196 | 10.121.12.48/28 | 10.121.12.49 – 10.121.12.62 | 10.121.12.63 |
| 197 | 10.121.12.64/28 | 10.121.12.65 – 10.121.12.78 | 10.121.12.79 |
| 198 | 10.121.12.80/28 | 10.121.12.81 – 10.121.12.94 | 10.121.12.95 |
| 199 | 10.121.12.96/28 | 10.121.12.97 – 10.121.12.110 | 10.121.12.111 |
| 200 | 10.121.12.112/28 | 10.121.12.113 – 10.121.12.126 | 10.121.12.127 |
| 201 | 10.121.12.128/28 | 10.121.12.129 – 10.121.12.142 | 10.121.12.143 |
| 202 | 10.121.12.144/28 | 10.121.12.145 – 10.121.12.158 | 10.121.12.159 |
| 203 | 10.121.12.160/28 | 10.121.12.161 – 10.121.12.174 | 10.121.12.175 |
| 204 | 10.121.12.176/28 | 10.121.12.177 – 10.121.12.190 | 10.121.12.191 |
| 205 | 10.121.12.192/28 | 10.121.12.193 – 10.121.12.206 | 10.121.12.207 |
| 206 | 10.121.12.208/28 | 10.121.12.209 – 10.121.12.222 | 10.121.12.223 |
| 207 | 10.121.12.224/28 | 10.121.12.225 – 10.121.12.238 | 10.121.12.239 |
| 208 | 10.121.12.240/28 | 10.121.12.241 – 10.121.12.254 | 10.121.12.255 |
| 209 | 10.121.13.0/28 | 10.121.13.1 – 10.121.13.14 | 10.121.13.15 |
| 210 | 10.121.13.16/28 | 10.121.13.17 – 10.121.13.30 | 10.121.13.31 |
| 211 | 10.121.13.32/28 | 10.121.13.33 – 10.121.13.46 | 10.121.13.47 |
| 212 | 10.121.13.48/28 | 10.121.13.49 – 10.121.13.62 | 10.121.13.63 |
| 213 | 10.121.13.64/28 | 10.121.13.65 – 10.121.13.78 | 10.121.13.79 |
| 214 | 10.121.13.80/28 | 10.121.13.81 – 10.121.13.94 | 10.121.13.95 |
| 215 | 10.121.13.96/28 | 10.121.13.97 – 10.121.13.110 | 10.121.13.111 |
| 216 | 10.121.13.112/28 | 10.121.13.113 – 10.121.13.126 | 10.121.13.127 |
| 217 | 10.121.13.128/28 | 10.121.13.129 – 10.121.13.142 | 10.121.13.143 |
| 218 | 10.121.13.144/28 | 10.121.13.145 – 10.121.13.158 | 10.121.13.159 |
| 219 | 10.121.13.160/28 | 10.121.13.161 – 10.121.13.174 | 10.121.13.175 |
| 220 | 10.121.13.176/28 | 10.121.13.177 – 10.121.13.190 | 10.121.13.191 |
| 221 | 10.121.13.192/28 | 10.121.13.193 – 10.121.13.206 | 10.121.13.207 |
| 222 | 10.121.13.208/28 | 10.121.13.209 – 10.121.13.222 | 10.121.13.223 |
| 223 | 10.121.13.224/28 | 10.121.13.225 – 10.121.13.238 | 10.121.13.239 |
| 224 | 10.121.13.240/28 | 10.121.13.241 – 10.121.13.254 | 10.121.13.255 |
| 225 | 10.121.14.0/28 | 10.121.14.1 – 10.121.14.14 | 10.121.14.15 |
| 226 | 10.121.14.16/28 | 10.121.14.17 – 10.121.14.30 | 10.121.14.31 |
| 227 | 10.121.14.32/28 | 10.121.14.33 – 10.121.14.46 | 10.121.14.47 |
| 228 | 10.121.14.48/28 | 10.121.14.49 – 10.121.14.62 | 10.121.14.63 |
| 229 | 10.121.14.64/28 | 10.121.14.65 – 10.121.14.78 | 10.121.14.79 |
| 230 | 10.121.14.80/28 | 10.121.14.81 – 10.121.14.94 | 10.121.14.95 |
| 231 | 10.121.14.96/28 | 10.121.14.97 – 10.121.14.110 | 10.121.14.111 |
| 232 | 10.121.14.112/28 | 10.121.14.113 – 10.121.14.126 | 10.121.14.127 |
| 233 | 10.121.14.128/28 | 10.121.14.129 – 10.121.14.142 | 10.121.14.143 |
| 234 | 10.121.14.144/28 | 10.121.14.145 – 10.121.14.158 | 10.121.14.159 |
| 235 | 10.121.14.160/28 | 10.121.14.161 – 10.121.14.174 | 10.121.14.175 |
| 236 | 10.121.14.176/28 | 10.121.14.177 – 10.121.14.190 | 10.121.14.191 |
| 237 | 10.121.14.192/28 | 10.121.14.193 – 10.121.14.206 | 10.121.14.207 |
| 238 | 10.121.14.208/28 | 10.121.14.209 – 10.121.14.222 | 10.121.14.223 |
| 239 | 10.121.14.224/28 | 10.121.14.225 – 10.121.14.238 | 10.121.14.239 |
| 240 | 10.121.14.240/28 | 10.121.14.241 – 10.121.14.254 | 10.121.14.255 |
| 241 | 10.121.15.0/28 | 10.121.15.1 – 10.121.15.14 | 10.121.15.15 |
| 242 | 10.121.15.16/28 | 10.121.15.17 – 10.121.15.30 | 10.121.15.31 |
| 243 | 10.121.15.32/28 | 10.121.15.33 – 10.121.15.46 | 10.121.15.47 |
| 244 | 10.121.15.48/28 | 10.121.15.49 – 10.121.15.62 | 10.121.15.63 |
| 245 | 10.121.15.64/28 | 10.121.15.65 – 10.121.15.78 | 10.121.15.79 |
| 246 | 10.121.15.80/28 | 10.121.15.81 – 10.121.15.94 | 10.121.15.95 |
| 247 | 10.121.15.96/28 | 10.121.15.97 – 10.121.15.110 | 10.121.15.111 |
| 248 | 10.121.15.112/28 | 10.121.15.113 – 10.121.15.126 | 10.121.15.127 |
| 249 | 10.121.15.128/28 | 10.121.15.129 – 10.121.15.142 | 10.121.15.143 |
| 250 | 10.121.15.144/28 | 10.121.15.145 – 10.121.15.158 | 10.121.15.159 |
| 251 | 10.121.15.160/28 | 10.121.15.161 – 10.121.15.174 | 10.121.15.175 |
| 252 | 10.121.15.176/28 | 10.121.15.177 – 10.121.15.190 | 10.121.15.191 |
| 253 | 10.121.15.192/28 | 10.121.15.193 – 10.121.15.206 | 10.121.15.207 |
| 254 | 10.121.15.208/28 | 10.121.15.209 – 10.121.15.222 | 10.121.15.223 |
| 255 | 10.121.15.224/28 | 10.121.15.225 – 10.121.15.238 | 10.121.15.239 |
| 256 | 10.121.15.240/28 | 10.121.15.241 – 10.121.15.254 | 10.121.15.255 |
showing 256 of 4,096
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.