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)10.21.192.0/18
network10.21.192.0/18
broadcast10.21.255.255
first host10.21.192.1
last host10.21.255.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.21.192.0/18
address00001010.00010101.11000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00010101.11000000.00000000
broadcast00001010.00010101.11111111.11111111
green = network part, grey = host part
hex0x0a15c000
decimal169197568
reverse dns0.192.21.10.in-addr.arpa
ipv4-mapped::ffff:a15:c000
/18 split into /29 · 2,048 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.21.192.0/29 | 10.21.192.1 – 10.21.192.6 | 10.21.192.7 |
| 2 | 10.21.192.8/29 | 10.21.192.9 – 10.21.192.14 | 10.21.192.15 |
| 3 | 10.21.192.16/29 | 10.21.192.17 – 10.21.192.22 | 10.21.192.23 |
| 4 | 10.21.192.24/29 | 10.21.192.25 – 10.21.192.30 | 10.21.192.31 |
| 5 | 10.21.192.32/29 | 10.21.192.33 – 10.21.192.38 | 10.21.192.39 |
| 6 | 10.21.192.40/29 | 10.21.192.41 – 10.21.192.46 | 10.21.192.47 |
| 7 | 10.21.192.48/29 | 10.21.192.49 – 10.21.192.54 | 10.21.192.55 |
| 8 | 10.21.192.56/29 | 10.21.192.57 – 10.21.192.62 | 10.21.192.63 |
| 9 | 10.21.192.64/29 | 10.21.192.65 – 10.21.192.70 | 10.21.192.71 |
| 10 | 10.21.192.72/29 | 10.21.192.73 – 10.21.192.78 | 10.21.192.79 |
| 11 | 10.21.192.80/29 | 10.21.192.81 – 10.21.192.86 | 10.21.192.87 |
| 12 | 10.21.192.88/29 | 10.21.192.89 – 10.21.192.94 | 10.21.192.95 |
| 13 | 10.21.192.96/29 | 10.21.192.97 – 10.21.192.102 | 10.21.192.103 |
| 14 | 10.21.192.104/29 | 10.21.192.105 – 10.21.192.110 | 10.21.192.111 |
| 15 | 10.21.192.112/29 | 10.21.192.113 – 10.21.192.118 | 10.21.192.119 |
| 16 | 10.21.192.120/29 | 10.21.192.121 – 10.21.192.126 | 10.21.192.127 |
| 17 | 10.21.192.128/29 | 10.21.192.129 – 10.21.192.134 | 10.21.192.135 |
| 18 | 10.21.192.136/29 | 10.21.192.137 – 10.21.192.142 | 10.21.192.143 |
| 19 | 10.21.192.144/29 | 10.21.192.145 – 10.21.192.150 | 10.21.192.151 |
| 20 | 10.21.192.152/29 | 10.21.192.153 – 10.21.192.158 | 10.21.192.159 |
| 21 | 10.21.192.160/29 | 10.21.192.161 – 10.21.192.166 | 10.21.192.167 |
| 22 | 10.21.192.168/29 | 10.21.192.169 – 10.21.192.174 | 10.21.192.175 |
| 23 | 10.21.192.176/29 | 10.21.192.177 – 10.21.192.182 | 10.21.192.183 |
| 24 | 10.21.192.184/29 | 10.21.192.185 – 10.21.192.190 | 10.21.192.191 |
| 25 | 10.21.192.192/29 | 10.21.192.193 – 10.21.192.198 | 10.21.192.199 |
| 26 | 10.21.192.200/29 | 10.21.192.201 – 10.21.192.206 | 10.21.192.207 |
| 27 | 10.21.192.208/29 | 10.21.192.209 – 10.21.192.214 | 10.21.192.215 |
| 28 | 10.21.192.216/29 | 10.21.192.217 – 10.21.192.222 | 10.21.192.223 |
| 29 | 10.21.192.224/29 | 10.21.192.225 – 10.21.192.230 | 10.21.192.231 |
| 30 | 10.21.192.232/29 | 10.21.192.233 – 10.21.192.238 | 10.21.192.239 |
| 31 | 10.21.192.240/29 | 10.21.192.241 – 10.21.192.246 | 10.21.192.247 |
| 32 | 10.21.192.248/29 | 10.21.192.249 – 10.21.192.254 | 10.21.192.255 |
| 33 | 10.21.193.0/29 | 10.21.193.1 – 10.21.193.6 | 10.21.193.7 |
| 34 | 10.21.193.8/29 | 10.21.193.9 – 10.21.193.14 | 10.21.193.15 |
| 35 | 10.21.193.16/29 | 10.21.193.17 – 10.21.193.22 | 10.21.193.23 |
| 36 | 10.21.193.24/29 | 10.21.193.25 – 10.21.193.30 | 10.21.193.31 |
| 37 | 10.21.193.32/29 | 10.21.193.33 – 10.21.193.38 | 10.21.193.39 |
| 38 | 10.21.193.40/29 | 10.21.193.41 – 10.21.193.46 | 10.21.193.47 |
| 39 | 10.21.193.48/29 | 10.21.193.49 – 10.21.193.54 | 10.21.193.55 |
| 40 | 10.21.193.56/29 | 10.21.193.57 – 10.21.193.62 | 10.21.193.63 |
| 41 | 10.21.193.64/29 | 10.21.193.65 – 10.21.193.70 | 10.21.193.71 |
| 42 | 10.21.193.72/29 | 10.21.193.73 – 10.21.193.78 | 10.21.193.79 |
| 43 | 10.21.193.80/29 | 10.21.193.81 – 10.21.193.86 | 10.21.193.87 |
| 44 | 10.21.193.88/29 | 10.21.193.89 – 10.21.193.94 | 10.21.193.95 |
| 45 | 10.21.193.96/29 | 10.21.193.97 – 10.21.193.102 | 10.21.193.103 |
| 46 | 10.21.193.104/29 | 10.21.193.105 – 10.21.193.110 | 10.21.193.111 |
| 47 | 10.21.193.112/29 | 10.21.193.113 – 10.21.193.118 | 10.21.193.119 |
| 48 | 10.21.193.120/29 | 10.21.193.121 – 10.21.193.126 | 10.21.193.127 |
| 49 | 10.21.193.128/29 | 10.21.193.129 – 10.21.193.134 | 10.21.193.135 |
| 50 | 10.21.193.136/29 | 10.21.193.137 – 10.21.193.142 | 10.21.193.143 |
| 51 | 10.21.193.144/29 | 10.21.193.145 – 10.21.193.150 | 10.21.193.151 |
| 52 | 10.21.193.152/29 | 10.21.193.153 – 10.21.193.158 | 10.21.193.159 |
| 53 | 10.21.193.160/29 | 10.21.193.161 – 10.21.193.166 | 10.21.193.167 |
| 54 | 10.21.193.168/29 | 10.21.193.169 – 10.21.193.174 | 10.21.193.175 |
| 55 | 10.21.193.176/29 | 10.21.193.177 – 10.21.193.182 | 10.21.193.183 |
| 56 | 10.21.193.184/29 | 10.21.193.185 – 10.21.193.190 | 10.21.193.191 |
| 57 | 10.21.193.192/29 | 10.21.193.193 – 10.21.193.198 | 10.21.193.199 |
| 58 | 10.21.193.200/29 | 10.21.193.201 – 10.21.193.206 | 10.21.193.207 |
| 59 | 10.21.193.208/29 | 10.21.193.209 – 10.21.193.214 | 10.21.193.215 |
| 60 | 10.21.193.216/29 | 10.21.193.217 – 10.21.193.222 | 10.21.193.223 |
| 61 | 10.21.193.224/29 | 10.21.193.225 – 10.21.193.230 | 10.21.193.231 |
| 62 | 10.21.193.232/29 | 10.21.193.233 – 10.21.193.238 | 10.21.193.239 |
| 63 | 10.21.193.240/29 | 10.21.193.241 – 10.21.193.246 | 10.21.193.247 |
| 64 | 10.21.193.248/29 | 10.21.193.249 – 10.21.193.254 | 10.21.193.255 |
| 65 | 10.21.194.0/29 | 10.21.194.1 – 10.21.194.6 | 10.21.194.7 |
| 66 | 10.21.194.8/29 | 10.21.194.9 – 10.21.194.14 | 10.21.194.15 |
| 67 | 10.21.194.16/29 | 10.21.194.17 – 10.21.194.22 | 10.21.194.23 |
| 68 | 10.21.194.24/29 | 10.21.194.25 – 10.21.194.30 | 10.21.194.31 |
| 69 | 10.21.194.32/29 | 10.21.194.33 – 10.21.194.38 | 10.21.194.39 |
| 70 | 10.21.194.40/29 | 10.21.194.41 – 10.21.194.46 | 10.21.194.47 |
| 71 | 10.21.194.48/29 | 10.21.194.49 – 10.21.194.54 | 10.21.194.55 |
| 72 | 10.21.194.56/29 | 10.21.194.57 – 10.21.194.62 | 10.21.194.63 |
| 73 | 10.21.194.64/29 | 10.21.194.65 – 10.21.194.70 | 10.21.194.71 |
| 74 | 10.21.194.72/29 | 10.21.194.73 – 10.21.194.78 | 10.21.194.79 |
| 75 | 10.21.194.80/29 | 10.21.194.81 – 10.21.194.86 | 10.21.194.87 |
| 76 | 10.21.194.88/29 | 10.21.194.89 – 10.21.194.94 | 10.21.194.95 |
| 77 | 10.21.194.96/29 | 10.21.194.97 – 10.21.194.102 | 10.21.194.103 |
| 78 | 10.21.194.104/29 | 10.21.194.105 – 10.21.194.110 | 10.21.194.111 |
| 79 | 10.21.194.112/29 | 10.21.194.113 – 10.21.194.118 | 10.21.194.119 |
| 80 | 10.21.194.120/29 | 10.21.194.121 – 10.21.194.126 | 10.21.194.127 |
| 81 | 10.21.194.128/29 | 10.21.194.129 – 10.21.194.134 | 10.21.194.135 |
| 82 | 10.21.194.136/29 | 10.21.194.137 – 10.21.194.142 | 10.21.194.143 |
| 83 | 10.21.194.144/29 | 10.21.194.145 – 10.21.194.150 | 10.21.194.151 |
| 84 | 10.21.194.152/29 | 10.21.194.153 – 10.21.194.158 | 10.21.194.159 |
| 85 | 10.21.194.160/29 | 10.21.194.161 – 10.21.194.166 | 10.21.194.167 |
| 86 | 10.21.194.168/29 | 10.21.194.169 – 10.21.194.174 | 10.21.194.175 |
| 87 | 10.21.194.176/29 | 10.21.194.177 – 10.21.194.182 | 10.21.194.183 |
| 88 | 10.21.194.184/29 | 10.21.194.185 – 10.21.194.190 | 10.21.194.191 |
| 89 | 10.21.194.192/29 | 10.21.194.193 – 10.21.194.198 | 10.21.194.199 |
| 90 | 10.21.194.200/29 | 10.21.194.201 – 10.21.194.206 | 10.21.194.207 |
| 91 | 10.21.194.208/29 | 10.21.194.209 – 10.21.194.214 | 10.21.194.215 |
| 92 | 10.21.194.216/29 | 10.21.194.217 – 10.21.194.222 | 10.21.194.223 |
| 93 | 10.21.194.224/29 | 10.21.194.225 – 10.21.194.230 | 10.21.194.231 |
| 94 | 10.21.194.232/29 | 10.21.194.233 – 10.21.194.238 | 10.21.194.239 |
| 95 | 10.21.194.240/29 | 10.21.194.241 – 10.21.194.246 | 10.21.194.247 |
| 96 | 10.21.194.248/29 | 10.21.194.249 – 10.21.194.254 | 10.21.194.255 |
| 97 | 10.21.195.0/29 | 10.21.195.1 – 10.21.195.6 | 10.21.195.7 |
| 98 | 10.21.195.8/29 | 10.21.195.9 – 10.21.195.14 | 10.21.195.15 |
| 99 | 10.21.195.16/29 | 10.21.195.17 – 10.21.195.22 | 10.21.195.23 |
| 100 | 10.21.195.24/29 | 10.21.195.25 – 10.21.195.30 | 10.21.195.31 |
| 101 | 10.21.195.32/29 | 10.21.195.33 – 10.21.195.38 | 10.21.195.39 |
| 102 | 10.21.195.40/29 | 10.21.195.41 – 10.21.195.46 | 10.21.195.47 |
| 103 | 10.21.195.48/29 | 10.21.195.49 – 10.21.195.54 | 10.21.195.55 |
| 104 | 10.21.195.56/29 | 10.21.195.57 – 10.21.195.62 | 10.21.195.63 |
| 105 | 10.21.195.64/29 | 10.21.195.65 – 10.21.195.70 | 10.21.195.71 |
| 106 | 10.21.195.72/29 | 10.21.195.73 – 10.21.195.78 | 10.21.195.79 |
| 107 | 10.21.195.80/29 | 10.21.195.81 – 10.21.195.86 | 10.21.195.87 |
| 108 | 10.21.195.88/29 | 10.21.195.89 – 10.21.195.94 | 10.21.195.95 |
| 109 | 10.21.195.96/29 | 10.21.195.97 – 10.21.195.102 | 10.21.195.103 |
| 110 | 10.21.195.104/29 | 10.21.195.105 – 10.21.195.110 | 10.21.195.111 |
| 111 | 10.21.195.112/29 | 10.21.195.113 – 10.21.195.118 | 10.21.195.119 |
| 112 | 10.21.195.120/29 | 10.21.195.121 – 10.21.195.126 | 10.21.195.127 |
| 113 | 10.21.195.128/29 | 10.21.195.129 – 10.21.195.134 | 10.21.195.135 |
| 114 | 10.21.195.136/29 | 10.21.195.137 – 10.21.195.142 | 10.21.195.143 |
| 115 | 10.21.195.144/29 | 10.21.195.145 – 10.21.195.150 | 10.21.195.151 |
| 116 | 10.21.195.152/29 | 10.21.195.153 – 10.21.195.158 | 10.21.195.159 |
| 117 | 10.21.195.160/29 | 10.21.195.161 – 10.21.195.166 | 10.21.195.167 |
| 118 | 10.21.195.168/29 | 10.21.195.169 – 10.21.195.174 | 10.21.195.175 |
| 119 | 10.21.195.176/29 | 10.21.195.177 – 10.21.195.182 | 10.21.195.183 |
| 120 | 10.21.195.184/29 | 10.21.195.185 – 10.21.195.190 | 10.21.195.191 |
| 121 | 10.21.195.192/29 | 10.21.195.193 – 10.21.195.198 | 10.21.195.199 |
| 122 | 10.21.195.200/29 | 10.21.195.201 – 10.21.195.206 | 10.21.195.207 |
| 123 | 10.21.195.208/29 | 10.21.195.209 – 10.21.195.214 | 10.21.195.215 |
| 124 | 10.21.195.216/29 | 10.21.195.217 – 10.21.195.222 | 10.21.195.223 |
| 125 | 10.21.195.224/29 | 10.21.195.225 – 10.21.195.230 | 10.21.195.231 |
| 126 | 10.21.195.232/29 | 10.21.195.233 – 10.21.195.238 | 10.21.195.239 |
| 127 | 10.21.195.240/29 | 10.21.195.241 – 10.21.195.246 | 10.21.195.247 |
| 128 | 10.21.195.248/29 | 10.21.195.249 – 10.21.195.254 | 10.21.195.255 |
| 129 | 10.21.196.0/29 | 10.21.196.1 – 10.21.196.6 | 10.21.196.7 |
| 130 | 10.21.196.8/29 | 10.21.196.9 – 10.21.196.14 | 10.21.196.15 |
| 131 | 10.21.196.16/29 | 10.21.196.17 – 10.21.196.22 | 10.21.196.23 |
| 132 | 10.21.196.24/29 | 10.21.196.25 – 10.21.196.30 | 10.21.196.31 |
| 133 | 10.21.196.32/29 | 10.21.196.33 – 10.21.196.38 | 10.21.196.39 |
| 134 | 10.21.196.40/29 | 10.21.196.41 – 10.21.196.46 | 10.21.196.47 |
| 135 | 10.21.196.48/29 | 10.21.196.49 – 10.21.196.54 | 10.21.196.55 |
| 136 | 10.21.196.56/29 | 10.21.196.57 – 10.21.196.62 | 10.21.196.63 |
| 137 | 10.21.196.64/29 | 10.21.196.65 – 10.21.196.70 | 10.21.196.71 |
| 138 | 10.21.196.72/29 | 10.21.196.73 – 10.21.196.78 | 10.21.196.79 |
| 139 | 10.21.196.80/29 | 10.21.196.81 – 10.21.196.86 | 10.21.196.87 |
| 140 | 10.21.196.88/29 | 10.21.196.89 – 10.21.196.94 | 10.21.196.95 |
| 141 | 10.21.196.96/29 | 10.21.196.97 – 10.21.196.102 | 10.21.196.103 |
| 142 | 10.21.196.104/29 | 10.21.196.105 – 10.21.196.110 | 10.21.196.111 |
| 143 | 10.21.196.112/29 | 10.21.196.113 – 10.21.196.118 | 10.21.196.119 |
| 144 | 10.21.196.120/29 | 10.21.196.121 – 10.21.196.126 | 10.21.196.127 |
| 145 | 10.21.196.128/29 | 10.21.196.129 – 10.21.196.134 | 10.21.196.135 |
| 146 | 10.21.196.136/29 | 10.21.196.137 – 10.21.196.142 | 10.21.196.143 |
| 147 | 10.21.196.144/29 | 10.21.196.145 – 10.21.196.150 | 10.21.196.151 |
| 148 | 10.21.196.152/29 | 10.21.196.153 – 10.21.196.158 | 10.21.196.159 |
| 149 | 10.21.196.160/29 | 10.21.196.161 – 10.21.196.166 | 10.21.196.167 |
| 150 | 10.21.196.168/29 | 10.21.196.169 – 10.21.196.174 | 10.21.196.175 |
| 151 | 10.21.196.176/29 | 10.21.196.177 – 10.21.196.182 | 10.21.196.183 |
| 152 | 10.21.196.184/29 | 10.21.196.185 – 10.21.196.190 | 10.21.196.191 |
| 153 | 10.21.196.192/29 | 10.21.196.193 – 10.21.196.198 | 10.21.196.199 |
| 154 | 10.21.196.200/29 | 10.21.196.201 – 10.21.196.206 | 10.21.196.207 |
| 155 | 10.21.196.208/29 | 10.21.196.209 – 10.21.196.214 | 10.21.196.215 |
| 156 | 10.21.196.216/29 | 10.21.196.217 – 10.21.196.222 | 10.21.196.223 |
| 157 | 10.21.196.224/29 | 10.21.196.225 – 10.21.196.230 | 10.21.196.231 |
| 158 | 10.21.196.232/29 | 10.21.196.233 – 10.21.196.238 | 10.21.196.239 |
| 159 | 10.21.196.240/29 | 10.21.196.241 – 10.21.196.246 | 10.21.196.247 |
| 160 | 10.21.196.248/29 | 10.21.196.249 – 10.21.196.254 | 10.21.196.255 |
| 161 | 10.21.197.0/29 | 10.21.197.1 – 10.21.197.6 | 10.21.197.7 |
| 162 | 10.21.197.8/29 | 10.21.197.9 – 10.21.197.14 | 10.21.197.15 |
| 163 | 10.21.197.16/29 | 10.21.197.17 – 10.21.197.22 | 10.21.197.23 |
| 164 | 10.21.197.24/29 | 10.21.197.25 – 10.21.197.30 | 10.21.197.31 |
| 165 | 10.21.197.32/29 | 10.21.197.33 – 10.21.197.38 | 10.21.197.39 |
| 166 | 10.21.197.40/29 | 10.21.197.41 – 10.21.197.46 | 10.21.197.47 |
| 167 | 10.21.197.48/29 | 10.21.197.49 – 10.21.197.54 | 10.21.197.55 |
| 168 | 10.21.197.56/29 | 10.21.197.57 – 10.21.197.62 | 10.21.197.63 |
| 169 | 10.21.197.64/29 | 10.21.197.65 – 10.21.197.70 | 10.21.197.71 |
| 170 | 10.21.197.72/29 | 10.21.197.73 – 10.21.197.78 | 10.21.197.79 |
| 171 | 10.21.197.80/29 | 10.21.197.81 – 10.21.197.86 | 10.21.197.87 |
| 172 | 10.21.197.88/29 | 10.21.197.89 – 10.21.197.94 | 10.21.197.95 |
| 173 | 10.21.197.96/29 | 10.21.197.97 – 10.21.197.102 | 10.21.197.103 |
| 174 | 10.21.197.104/29 | 10.21.197.105 – 10.21.197.110 | 10.21.197.111 |
| 175 | 10.21.197.112/29 | 10.21.197.113 – 10.21.197.118 | 10.21.197.119 |
| 176 | 10.21.197.120/29 | 10.21.197.121 – 10.21.197.126 | 10.21.197.127 |
| 177 | 10.21.197.128/29 | 10.21.197.129 – 10.21.197.134 | 10.21.197.135 |
| 178 | 10.21.197.136/29 | 10.21.197.137 – 10.21.197.142 | 10.21.197.143 |
| 179 | 10.21.197.144/29 | 10.21.197.145 – 10.21.197.150 | 10.21.197.151 |
| 180 | 10.21.197.152/29 | 10.21.197.153 – 10.21.197.158 | 10.21.197.159 |
| 181 | 10.21.197.160/29 | 10.21.197.161 – 10.21.197.166 | 10.21.197.167 |
| 182 | 10.21.197.168/29 | 10.21.197.169 – 10.21.197.174 | 10.21.197.175 |
| 183 | 10.21.197.176/29 | 10.21.197.177 – 10.21.197.182 | 10.21.197.183 |
| 184 | 10.21.197.184/29 | 10.21.197.185 – 10.21.197.190 | 10.21.197.191 |
| 185 | 10.21.197.192/29 | 10.21.197.193 – 10.21.197.198 | 10.21.197.199 |
| 186 | 10.21.197.200/29 | 10.21.197.201 – 10.21.197.206 | 10.21.197.207 |
| 187 | 10.21.197.208/29 | 10.21.197.209 – 10.21.197.214 | 10.21.197.215 |
| 188 | 10.21.197.216/29 | 10.21.197.217 – 10.21.197.222 | 10.21.197.223 |
| 189 | 10.21.197.224/29 | 10.21.197.225 – 10.21.197.230 | 10.21.197.231 |
| 190 | 10.21.197.232/29 | 10.21.197.233 – 10.21.197.238 | 10.21.197.239 |
| 191 | 10.21.197.240/29 | 10.21.197.241 – 10.21.197.246 | 10.21.197.247 |
| 192 | 10.21.197.248/29 | 10.21.197.249 – 10.21.197.254 | 10.21.197.255 |
| 193 | 10.21.198.0/29 | 10.21.198.1 – 10.21.198.6 | 10.21.198.7 |
| 194 | 10.21.198.8/29 | 10.21.198.9 – 10.21.198.14 | 10.21.198.15 |
| 195 | 10.21.198.16/29 | 10.21.198.17 – 10.21.198.22 | 10.21.198.23 |
| 196 | 10.21.198.24/29 | 10.21.198.25 – 10.21.198.30 | 10.21.198.31 |
| 197 | 10.21.198.32/29 | 10.21.198.33 – 10.21.198.38 | 10.21.198.39 |
| 198 | 10.21.198.40/29 | 10.21.198.41 – 10.21.198.46 | 10.21.198.47 |
| 199 | 10.21.198.48/29 | 10.21.198.49 – 10.21.198.54 | 10.21.198.55 |
| 200 | 10.21.198.56/29 | 10.21.198.57 – 10.21.198.62 | 10.21.198.63 |
| 201 | 10.21.198.64/29 | 10.21.198.65 – 10.21.198.70 | 10.21.198.71 |
| 202 | 10.21.198.72/29 | 10.21.198.73 – 10.21.198.78 | 10.21.198.79 |
| 203 | 10.21.198.80/29 | 10.21.198.81 – 10.21.198.86 | 10.21.198.87 |
| 204 | 10.21.198.88/29 | 10.21.198.89 – 10.21.198.94 | 10.21.198.95 |
| 205 | 10.21.198.96/29 | 10.21.198.97 – 10.21.198.102 | 10.21.198.103 |
| 206 | 10.21.198.104/29 | 10.21.198.105 – 10.21.198.110 | 10.21.198.111 |
| 207 | 10.21.198.112/29 | 10.21.198.113 – 10.21.198.118 | 10.21.198.119 |
| 208 | 10.21.198.120/29 | 10.21.198.121 – 10.21.198.126 | 10.21.198.127 |
| 209 | 10.21.198.128/29 | 10.21.198.129 – 10.21.198.134 | 10.21.198.135 |
| 210 | 10.21.198.136/29 | 10.21.198.137 – 10.21.198.142 | 10.21.198.143 |
| 211 | 10.21.198.144/29 | 10.21.198.145 – 10.21.198.150 | 10.21.198.151 |
| 212 | 10.21.198.152/29 | 10.21.198.153 – 10.21.198.158 | 10.21.198.159 |
| 213 | 10.21.198.160/29 | 10.21.198.161 – 10.21.198.166 | 10.21.198.167 |
| 214 | 10.21.198.168/29 | 10.21.198.169 – 10.21.198.174 | 10.21.198.175 |
| 215 | 10.21.198.176/29 | 10.21.198.177 – 10.21.198.182 | 10.21.198.183 |
| 216 | 10.21.198.184/29 | 10.21.198.185 – 10.21.198.190 | 10.21.198.191 |
| 217 | 10.21.198.192/29 | 10.21.198.193 – 10.21.198.198 | 10.21.198.199 |
| 218 | 10.21.198.200/29 | 10.21.198.201 – 10.21.198.206 | 10.21.198.207 |
| 219 | 10.21.198.208/29 | 10.21.198.209 – 10.21.198.214 | 10.21.198.215 |
| 220 | 10.21.198.216/29 | 10.21.198.217 – 10.21.198.222 | 10.21.198.223 |
| 221 | 10.21.198.224/29 | 10.21.198.225 – 10.21.198.230 | 10.21.198.231 |
| 222 | 10.21.198.232/29 | 10.21.198.233 – 10.21.198.238 | 10.21.198.239 |
| 223 | 10.21.198.240/29 | 10.21.198.241 – 10.21.198.246 | 10.21.198.247 |
| 224 | 10.21.198.248/29 | 10.21.198.249 – 10.21.198.254 | 10.21.198.255 |
| 225 | 10.21.199.0/29 | 10.21.199.1 – 10.21.199.6 | 10.21.199.7 |
| 226 | 10.21.199.8/29 | 10.21.199.9 – 10.21.199.14 | 10.21.199.15 |
| 227 | 10.21.199.16/29 | 10.21.199.17 – 10.21.199.22 | 10.21.199.23 |
| 228 | 10.21.199.24/29 | 10.21.199.25 – 10.21.199.30 | 10.21.199.31 |
| 229 | 10.21.199.32/29 | 10.21.199.33 – 10.21.199.38 | 10.21.199.39 |
| 230 | 10.21.199.40/29 | 10.21.199.41 – 10.21.199.46 | 10.21.199.47 |
| 231 | 10.21.199.48/29 | 10.21.199.49 – 10.21.199.54 | 10.21.199.55 |
| 232 | 10.21.199.56/29 | 10.21.199.57 – 10.21.199.62 | 10.21.199.63 |
| 233 | 10.21.199.64/29 | 10.21.199.65 – 10.21.199.70 | 10.21.199.71 |
| 234 | 10.21.199.72/29 | 10.21.199.73 – 10.21.199.78 | 10.21.199.79 |
| 235 | 10.21.199.80/29 | 10.21.199.81 – 10.21.199.86 | 10.21.199.87 |
| 236 | 10.21.199.88/29 | 10.21.199.89 – 10.21.199.94 | 10.21.199.95 |
| 237 | 10.21.199.96/29 | 10.21.199.97 – 10.21.199.102 | 10.21.199.103 |
| 238 | 10.21.199.104/29 | 10.21.199.105 – 10.21.199.110 | 10.21.199.111 |
| 239 | 10.21.199.112/29 | 10.21.199.113 – 10.21.199.118 | 10.21.199.119 |
| 240 | 10.21.199.120/29 | 10.21.199.121 – 10.21.199.126 | 10.21.199.127 |
| 241 | 10.21.199.128/29 | 10.21.199.129 – 10.21.199.134 | 10.21.199.135 |
| 242 | 10.21.199.136/29 | 10.21.199.137 – 10.21.199.142 | 10.21.199.143 |
| 243 | 10.21.199.144/29 | 10.21.199.145 – 10.21.199.150 | 10.21.199.151 |
| 244 | 10.21.199.152/29 | 10.21.199.153 – 10.21.199.158 | 10.21.199.159 |
| 245 | 10.21.199.160/29 | 10.21.199.161 – 10.21.199.166 | 10.21.199.167 |
| 246 | 10.21.199.168/29 | 10.21.199.169 – 10.21.199.174 | 10.21.199.175 |
| 247 | 10.21.199.176/29 | 10.21.199.177 – 10.21.199.182 | 10.21.199.183 |
| 248 | 10.21.199.184/29 | 10.21.199.185 – 10.21.199.190 | 10.21.199.191 |
| 249 | 10.21.199.192/29 | 10.21.199.193 – 10.21.199.198 | 10.21.199.199 |
| 250 | 10.21.199.200/29 | 10.21.199.201 – 10.21.199.206 | 10.21.199.207 |
| 251 | 10.21.199.208/29 | 10.21.199.209 – 10.21.199.214 | 10.21.199.215 |
| 252 | 10.21.199.216/29 | 10.21.199.217 – 10.21.199.222 | 10.21.199.223 |
| 253 | 10.21.199.224/29 | 10.21.199.225 – 10.21.199.230 | 10.21.199.231 |
| 254 | 10.21.199.232/29 | 10.21.199.233 – 10.21.199.238 | 10.21.199.239 |
| 255 | 10.21.199.240/29 | 10.21.199.241 – 10.21.199.246 | 10.21.199.247 |
| 256 | 10.21.199.248/29 | 10.21.199.249 – 10.21.199.254 | 10.21.199.255 |
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 /18 |
|---|---|---|---|---|
| /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 | 1 |
| /19 | 255.255.224.0 | 8,192 | 8,190 | 2 split → |
| /20 | 255.255.240.0 | 4,096 | 4,094 | 4 split → |
| /21 | 255.255.248.0 | 2,048 | 2,046 | 8 split → |
| /22 | 255.255.252.0 | 1,024 | 1,022 | 16 split → |
| /23 | 255.255.254.0 | 512 | 510 | 32 split → |
| /24 | 255.255.255.0 | 256 | 254 | 64 split → |
| /25 | 255.255.255.128 | 128 | 126 | 128 split → |
| /26 | 255.255.255.192 | 64 | 62 | 256 split → |
| /27 | 255.255.255.224 | 32 | 30 | 512 split → |
| /28 | 255.255.255.240 | 16 | 14 | 1,024 split → |
| /29 | 255.255.255.248 | 8 | 6 | 2,048 split → |
| /30 | 255.255.255.252 | 4 | 2 | 4,096 split → |
| /31 | 255.255.255.254 | 2 | 2 | 8,192 split → |
| /32 | 255.255.255.255 | 1 | 1 | 16,384 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.