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)10.0.248.0/21
network10.0.248.0/21
broadcast10.0.255.255
first host10.0.248.1
last host10.0.255.254
subnet mask255.255.248.0
wildcard0.0.7.255
addresses2,048
usable hosts2,046
classA
ipcalc 10.0.248.0/21
address00001010.00000000.11111000.00000000
subnet mask11111111.11111111.11111000.00000000
network00001010.00000000.11111000.00000000
broadcast00001010.00000000.11111111.11111111
green = network part, grey = host part
hex0x0a00f800
decimal167835648
reverse dns0.248.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:f800
/21 split into /31 · 1,024 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.0.248.0/31 | 10.0.248.0 – 10.0.248.1 | 10.0.248.1 |
| 2 | 10.0.248.2/31 | 10.0.248.2 – 10.0.248.3 | 10.0.248.3 |
| 3 | 10.0.248.4/31 | 10.0.248.4 – 10.0.248.5 | 10.0.248.5 |
| 4 | 10.0.248.6/31 | 10.0.248.6 – 10.0.248.7 | 10.0.248.7 |
| 5 | 10.0.248.8/31 | 10.0.248.8 – 10.0.248.9 | 10.0.248.9 |
| 6 | 10.0.248.10/31 | 10.0.248.10 – 10.0.248.11 | 10.0.248.11 |
| 7 | 10.0.248.12/31 | 10.0.248.12 – 10.0.248.13 | 10.0.248.13 |
| 8 | 10.0.248.14/31 | 10.0.248.14 – 10.0.248.15 | 10.0.248.15 |
| 9 | 10.0.248.16/31 | 10.0.248.16 – 10.0.248.17 | 10.0.248.17 |
| 10 | 10.0.248.18/31 | 10.0.248.18 – 10.0.248.19 | 10.0.248.19 |
| 11 | 10.0.248.20/31 | 10.0.248.20 – 10.0.248.21 | 10.0.248.21 |
| 12 | 10.0.248.22/31 | 10.0.248.22 – 10.0.248.23 | 10.0.248.23 |
| 13 | 10.0.248.24/31 | 10.0.248.24 – 10.0.248.25 | 10.0.248.25 |
| 14 | 10.0.248.26/31 | 10.0.248.26 – 10.0.248.27 | 10.0.248.27 |
| 15 | 10.0.248.28/31 | 10.0.248.28 – 10.0.248.29 | 10.0.248.29 |
| 16 | 10.0.248.30/31 | 10.0.248.30 – 10.0.248.31 | 10.0.248.31 |
| 17 | 10.0.248.32/31 | 10.0.248.32 – 10.0.248.33 | 10.0.248.33 |
| 18 | 10.0.248.34/31 | 10.0.248.34 – 10.0.248.35 | 10.0.248.35 |
| 19 | 10.0.248.36/31 | 10.0.248.36 – 10.0.248.37 | 10.0.248.37 |
| 20 | 10.0.248.38/31 | 10.0.248.38 – 10.0.248.39 | 10.0.248.39 |
| 21 | 10.0.248.40/31 | 10.0.248.40 – 10.0.248.41 | 10.0.248.41 |
| 22 | 10.0.248.42/31 | 10.0.248.42 – 10.0.248.43 | 10.0.248.43 |
| 23 | 10.0.248.44/31 | 10.0.248.44 – 10.0.248.45 | 10.0.248.45 |
| 24 | 10.0.248.46/31 | 10.0.248.46 – 10.0.248.47 | 10.0.248.47 |
| 25 | 10.0.248.48/31 | 10.0.248.48 – 10.0.248.49 | 10.0.248.49 |
| 26 | 10.0.248.50/31 | 10.0.248.50 – 10.0.248.51 | 10.0.248.51 |
| 27 | 10.0.248.52/31 | 10.0.248.52 – 10.0.248.53 | 10.0.248.53 |
| 28 | 10.0.248.54/31 | 10.0.248.54 – 10.0.248.55 | 10.0.248.55 |
| 29 | 10.0.248.56/31 | 10.0.248.56 – 10.0.248.57 | 10.0.248.57 |
| 30 | 10.0.248.58/31 | 10.0.248.58 – 10.0.248.59 | 10.0.248.59 |
| 31 | 10.0.248.60/31 | 10.0.248.60 – 10.0.248.61 | 10.0.248.61 |
| 32 | 10.0.248.62/31 | 10.0.248.62 – 10.0.248.63 | 10.0.248.63 |
| 33 | 10.0.248.64/31 | 10.0.248.64 – 10.0.248.65 | 10.0.248.65 |
| 34 | 10.0.248.66/31 | 10.0.248.66 – 10.0.248.67 | 10.0.248.67 |
| 35 | 10.0.248.68/31 | 10.0.248.68 – 10.0.248.69 | 10.0.248.69 |
| 36 | 10.0.248.70/31 | 10.0.248.70 – 10.0.248.71 | 10.0.248.71 |
| 37 | 10.0.248.72/31 | 10.0.248.72 – 10.0.248.73 | 10.0.248.73 |
| 38 | 10.0.248.74/31 | 10.0.248.74 – 10.0.248.75 | 10.0.248.75 |
| 39 | 10.0.248.76/31 | 10.0.248.76 – 10.0.248.77 | 10.0.248.77 |
| 40 | 10.0.248.78/31 | 10.0.248.78 – 10.0.248.79 | 10.0.248.79 |
| 41 | 10.0.248.80/31 | 10.0.248.80 – 10.0.248.81 | 10.0.248.81 |
| 42 | 10.0.248.82/31 | 10.0.248.82 – 10.0.248.83 | 10.0.248.83 |
| 43 | 10.0.248.84/31 | 10.0.248.84 – 10.0.248.85 | 10.0.248.85 |
| 44 | 10.0.248.86/31 | 10.0.248.86 – 10.0.248.87 | 10.0.248.87 |
| 45 | 10.0.248.88/31 | 10.0.248.88 – 10.0.248.89 | 10.0.248.89 |
| 46 | 10.0.248.90/31 | 10.0.248.90 – 10.0.248.91 | 10.0.248.91 |
| 47 | 10.0.248.92/31 | 10.0.248.92 – 10.0.248.93 | 10.0.248.93 |
| 48 | 10.0.248.94/31 | 10.0.248.94 – 10.0.248.95 | 10.0.248.95 |
| 49 | 10.0.248.96/31 | 10.0.248.96 – 10.0.248.97 | 10.0.248.97 |
| 50 | 10.0.248.98/31 | 10.0.248.98 – 10.0.248.99 | 10.0.248.99 |
| 51 | 10.0.248.100/31 | 10.0.248.100 – 10.0.248.101 | 10.0.248.101 |
| 52 | 10.0.248.102/31 | 10.0.248.102 – 10.0.248.103 | 10.0.248.103 |
| 53 | 10.0.248.104/31 | 10.0.248.104 – 10.0.248.105 | 10.0.248.105 |
| 54 | 10.0.248.106/31 | 10.0.248.106 – 10.0.248.107 | 10.0.248.107 |
| 55 | 10.0.248.108/31 | 10.0.248.108 – 10.0.248.109 | 10.0.248.109 |
| 56 | 10.0.248.110/31 | 10.0.248.110 – 10.0.248.111 | 10.0.248.111 |
| 57 | 10.0.248.112/31 | 10.0.248.112 – 10.0.248.113 | 10.0.248.113 |
| 58 | 10.0.248.114/31 | 10.0.248.114 – 10.0.248.115 | 10.0.248.115 |
| 59 | 10.0.248.116/31 | 10.0.248.116 – 10.0.248.117 | 10.0.248.117 |
| 60 | 10.0.248.118/31 | 10.0.248.118 – 10.0.248.119 | 10.0.248.119 |
| 61 | 10.0.248.120/31 | 10.0.248.120 – 10.0.248.121 | 10.0.248.121 |
| 62 | 10.0.248.122/31 | 10.0.248.122 – 10.0.248.123 | 10.0.248.123 |
| 63 | 10.0.248.124/31 | 10.0.248.124 – 10.0.248.125 | 10.0.248.125 |
| 64 | 10.0.248.126/31 | 10.0.248.126 – 10.0.248.127 | 10.0.248.127 |
| 65 | 10.0.248.128/31 | 10.0.248.128 – 10.0.248.129 | 10.0.248.129 |
| 66 | 10.0.248.130/31 | 10.0.248.130 – 10.0.248.131 | 10.0.248.131 |
| 67 | 10.0.248.132/31 | 10.0.248.132 – 10.0.248.133 | 10.0.248.133 |
| 68 | 10.0.248.134/31 | 10.0.248.134 – 10.0.248.135 | 10.0.248.135 |
| 69 | 10.0.248.136/31 | 10.0.248.136 – 10.0.248.137 | 10.0.248.137 |
| 70 | 10.0.248.138/31 | 10.0.248.138 – 10.0.248.139 | 10.0.248.139 |
| 71 | 10.0.248.140/31 | 10.0.248.140 – 10.0.248.141 | 10.0.248.141 |
| 72 | 10.0.248.142/31 | 10.0.248.142 – 10.0.248.143 | 10.0.248.143 |
| 73 | 10.0.248.144/31 | 10.0.248.144 – 10.0.248.145 | 10.0.248.145 |
| 74 | 10.0.248.146/31 | 10.0.248.146 – 10.0.248.147 | 10.0.248.147 |
| 75 | 10.0.248.148/31 | 10.0.248.148 – 10.0.248.149 | 10.0.248.149 |
| 76 | 10.0.248.150/31 | 10.0.248.150 – 10.0.248.151 | 10.0.248.151 |
| 77 | 10.0.248.152/31 | 10.0.248.152 – 10.0.248.153 | 10.0.248.153 |
| 78 | 10.0.248.154/31 | 10.0.248.154 – 10.0.248.155 | 10.0.248.155 |
| 79 | 10.0.248.156/31 | 10.0.248.156 – 10.0.248.157 | 10.0.248.157 |
| 80 | 10.0.248.158/31 | 10.0.248.158 – 10.0.248.159 | 10.0.248.159 |
| 81 | 10.0.248.160/31 | 10.0.248.160 – 10.0.248.161 | 10.0.248.161 |
| 82 | 10.0.248.162/31 | 10.0.248.162 – 10.0.248.163 | 10.0.248.163 |
| 83 | 10.0.248.164/31 | 10.0.248.164 – 10.0.248.165 | 10.0.248.165 |
| 84 | 10.0.248.166/31 | 10.0.248.166 – 10.0.248.167 | 10.0.248.167 |
| 85 | 10.0.248.168/31 | 10.0.248.168 – 10.0.248.169 | 10.0.248.169 |
| 86 | 10.0.248.170/31 | 10.0.248.170 – 10.0.248.171 | 10.0.248.171 |
| 87 | 10.0.248.172/31 | 10.0.248.172 – 10.0.248.173 | 10.0.248.173 |
| 88 | 10.0.248.174/31 | 10.0.248.174 – 10.0.248.175 | 10.0.248.175 |
| 89 | 10.0.248.176/31 | 10.0.248.176 – 10.0.248.177 | 10.0.248.177 |
| 90 | 10.0.248.178/31 | 10.0.248.178 – 10.0.248.179 | 10.0.248.179 |
| 91 | 10.0.248.180/31 | 10.0.248.180 – 10.0.248.181 | 10.0.248.181 |
| 92 | 10.0.248.182/31 | 10.0.248.182 – 10.0.248.183 | 10.0.248.183 |
| 93 | 10.0.248.184/31 | 10.0.248.184 – 10.0.248.185 | 10.0.248.185 |
| 94 | 10.0.248.186/31 | 10.0.248.186 – 10.0.248.187 | 10.0.248.187 |
| 95 | 10.0.248.188/31 | 10.0.248.188 – 10.0.248.189 | 10.0.248.189 |
| 96 | 10.0.248.190/31 | 10.0.248.190 – 10.0.248.191 | 10.0.248.191 |
| 97 | 10.0.248.192/31 | 10.0.248.192 – 10.0.248.193 | 10.0.248.193 |
| 98 | 10.0.248.194/31 | 10.0.248.194 – 10.0.248.195 | 10.0.248.195 |
| 99 | 10.0.248.196/31 | 10.0.248.196 – 10.0.248.197 | 10.0.248.197 |
| 100 | 10.0.248.198/31 | 10.0.248.198 – 10.0.248.199 | 10.0.248.199 |
| 101 | 10.0.248.200/31 | 10.0.248.200 – 10.0.248.201 | 10.0.248.201 |
| 102 | 10.0.248.202/31 | 10.0.248.202 – 10.0.248.203 | 10.0.248.203 |
| 103 | 10.0.248.204/31 | 10.0.248.204 – 10.0.248.205 | 10.0.248.205 |
| 104 | 10.0.248.206/31 | 10.0.248.206 – 10.0.248.207 | 10.0.248.207 |
| 105 | 10.0.248.208/31 | 10.0.248.208 – 10.0.248.209 | 10.0.248.209 |
| 106 | 10.0.248.210/31 | 10.0.248.210 – 10.0.248.211 | 10.0.248.211 |
| 107 | 10.0.248.212/31 | 10.0.248.212 – 10.0.248.213 | 10.0.248.213 |
| 108 | 10.0.248.214/31 | 10.0.248.214 – 10.0.248.215 | 10.0.248.215 |
| 109 | 10.0.248.216/31 | 10.0.248.216 – 10.0.248.217 | 10.0.248.217 |
| 110 | 10.0.248.218/31 | 10.0.248.218 – 10.0.248.219 | 10.0.248.219 |
| 111 | 10.0.248.220/31 | 10.0.248.220 – 10.0.248.221 | 10.0.248.221 |
| 112 | 10.0.248.222/31 | 10.0.248.222 – 10.0.248.223 | 10.0.248.223 |
| 113 | 10.0.248.224/31 | 10.0.248.224 – 10.0.248.225 | 10.0.248.225 |
| 114 | 10.0.248.226/31 | 10.0.248.226 – 10.0.248.227 | 10.0.248.227 |
| 115 | 10.0.248.228/31 | 10.0.248.228 – 10.0.248.229 | 10.0.248.229 |
| 116 | 10.0.248.230/31 | 10.0.248.230 – 10.0.248.231 | 10.0.248.231 |
| 117 | 10.0.248.232/31 | 10.0.248.232 – 10.0.248.233 | 10.0.248.233 |
| 118 | 10.0.248.234/31 | 10.0.248.234 – 10.0.248.235 | 10.0.248.235 |
| 119 | 10.0.248.236/31 | 10.0.248.236 – 10.0.248.237 | 10.0.248.237 |
| 120 | 10.0.248.238/31 | 10.0.248.238 – 10.0.248.239 | 10.0.248.239 |
| 121 | 10.0.248.240/31 | 10.0.248.240 – 10.0.248.241 | 10.0.248.241 |
| 122 | 10.0.248.242/31 | 10.0.248.242 – 10.0.248.243 | 10.0.248.243 |
| 123 | 10.0.248.244/31 | 10.0.248.244 – 10.0.248.245 | 10.0.248.245 |
| 124 | 10.0.248.246/31 | 10.0.248.246 – 10.0.248.247 | 10.0.248.247 |
| 125 | 10.0.248.248/31 | 10.0.248.248 – 10.0.248.249 | 10.0.248.249 |
| 126 | 10.0.248.250/31 | 10.0.248.250 – 10.0.248.251 | 10.0.248.251 |
| 127 | 10.0.248.252/31 | 10.0.248.252 – 10.0.248.253 | 10.0.248.253 |
| 128 | 10.0.248.254/31 | 10.0.248.254 – 10.0.248.255 | 10.0.248.255 |
| 129 | 10.0.249.0/31 | 10.0.249.0 – 10.0.249.1 | 10.0.249.1 |
| 130 | 10.0.249.2/31 | 10.0.249.2 – 10.0.249.3 | 10.0.249.3 |
| 131 | 10.0.249.4/31 | 10.0.249.4 – 10.0.249.5 | 10.0.249.5 |
| 132 | 10.0.249.6/31 | 10.0.249.6 – 10.0.249.7 | 10.0.249.7 |
| 133 | 10.0.249.8/31 | 10.0.249.8 – 10.0.249.9 | 10.0.249.9 |
| 134 | 10.0.249.10/31 | 10.0.249.10 – 10.0.249.11 | 10.0.249.11 |
| 135 | 10.0.249.12/31 | 10.0.249.12 – 10.0.249.13 | 10.0.249.13 |
| 136 | 10.0.249.14/31 | 10.0.249.14 – 10.0.249.15 | 10.0.249.15 |
| 137 | 10.0.249.16/31 | 10.0.249.16 – 10.0.249.17 | 10.0.249.17 |
| 138 | 10.0.249.18/31 | 10.0.249.18 – 10.0.249.19 | 10.0.249.19 |
| 139 | 10.0.249.20/31 | 10.0.249.20 – 10.0.249.21 | 10.0.249.21 |
| 140 | 10.0.249.22/31 | 10.0.249.22 – 10.0.249.23 | 10.0.249.23 |
| 141 | 10.0.249.24/31 | 10.0.249.24 – 10.0.249.25 | 10.0.249.25 |
| 142 | 10.0.249.26/31 | 10.0.249.26 – 10.0.249.27 | 10.0.249.27 |
| 143 | 10.0.249.28/31 | 10.0.249.28 – 10.0.249.29 | 10.0.249.29 |
| 144 | 10.0.249.30/31 | 10.0.249.30 – 10.0.249.31 | 10.0.249.31 |
| 145 | 10.0.249.32/31 | 10.0.249.32 – 10.0.249.33 | 10.0.249.33 |
| 146 | 10.0.249.34/31 | 10.0.249.34 – 10.0.249.35 | 10.0.249.35 |
| 147 | 10.0.249.36/31 | 10.0.249.36 – 10.0.249.37 | 10.0.249.37 |
| 148 | 10.0.249.38/31 | 10.0.249.38 – 10.0.249.39 | 10.0.249.39 |
| 149 | 10.0.249.40/31 | 10.0.249.40 – 10.0.249.41 | 10.0.249.41 |
| 150 | 10.0.249.42/31 | 10.0.249.42 – 10.0.249.43 | 10.0.249.43 |
| 151 | 10.0.249.44/31 | 10.0.249.44 – 10.0.249.45 | 10.0.249.45 |
| 152 | 10.0.249.46/31 | 10.0.249.46 – 10.0.249.47 | 10.0.249.47 |
| 153 | 10.0.249.48/31 | 10.0.249.48 – 10.0.249.49 | 10.0.249.49 |
| 154 | 10.0.249.50/31 | 10.0.249.50 – 10.0.249.51 | 10.0.249.51 |
| 155 | 10.0.249.52/31 | 10.0.249.52 – 10.0.249.53 | 10.0.249.53 |
| 156 | 10.0.249.54/31 | 10.0.249.54 – 10.0.249.55 | 10.0.249.55 |
| 157 | 10.0.249.56/31 | 10.0.249.56 – 10.0.249.57 | 10.0.249.57 |
| 158 | 10.0.249.58/31 | 10.0.249.58 – 10.0.249.59 | 10.0.249.59 |
| 159 | 10.0.249.60/31 | 10.0.249.60 – 10.0.249.61 | 10.0.249.61 |
| 160 | 10.0.249.62/31 | 10.0.249.62 – 10.0.249.63 | 10.0.249.63 |
| 161 | 10.0.249.64/31 | 10.0.249.64 – 10.0.249.65 | 10.0.249.65 |
| 162 | 10.0.249.66/31 | 10.0.249.66 – 10.0.249.67 | 10.0.249.67 |
| 163 | 10.0.249.68/31 | 10.0.249.68 – 10.0.249.69 | 10.0.249.69 |
| 164 | 10.0.249.70/31 | 10.0.249.70 – 10.0.249.71 | 10.0.249.71 |
| 165 | 10.0.249.72/31 | 10.0.249.72 – 10.0.249.73 | 10.0.249.73 |
| 166 | 10.0.249.74/31 | 10.0.249.74 – 10.0.249.75 | 10.0.249.75 |
| 167 | 10.0.249.76/31 | 10.0.249.76 – 10.0.249.77 | 10.0.249.77 |
| 168 | 10.0.249.78/31 | 10.0.249.78 – 10.0.249.79 | 10.0.249.79 |
| 169 | 10.0.249.80/31 | 10.0.249.80 – 10.0.249.81 | 10.0.249.81 |
| 170 | 10.0.249.82/31 | 10.0.249.82 – 10.0.249.83 | 10.0.249.83 |
| 171 | 10.0.249.84/31 | 10.0.249.84 – 10.0.249.85 | 10.0.249.85 |
| 172 | 10.0.249.86/31 | 10.0.249.86 – 10.0.249.87 | 10.0.249.87 |
| 173 | 10.0.249.88/31 | 10.0.249.88 – 10.0.249.89 | 10.0.249.89 |
| 174 | 10.0.249.90/31 | 10.0.249.90 – 10.0.249.91 | 10.0.249.91 |
| 175 | 10.0.249.92/31 | 10.0.249.92 – 10.0.249.93 | 10.0.249.93 |
| 176 | 10.0.249.94/31 | 10.0.249.94 – 10.0.249.95 | 10.0.249.95 |
| 177 | 10.0.249.96/31 | 10.0.249.96 – 10.0.249.97 | 10.0.249.97 |
| 178 | 10.0.249.98/31 | 10.0.249.98 – 10.0.249.99 | 10.0.249.99 |
| 179 | 10.0.249.100/31 | 10.0.249.100 – 10.0.249.101 | 10.0.249.101 |
| 180 | 10.0.249.102/31 | 10.0.249.102 – 10.0.249.103 | 10.0.249.103 |
| 181 | 10.0.249.104/31 | 10.0.249.104 – 10.0.249.105 | 10.0.249.105 |
| 182 | 10.0.249.106/31 | 10.0.249.106 – 10.0.249.107 | 10.0.249.107 |
| 183 | 10.0.249.108/31 | 10.0.249.108 – 10.0.249.109 | 10.0.249.109 |
| 184 | 10.0.249.110/31 | 10.0.249.110 – 10.0.249.111 | 10.0.249.111 |
| 185 | 10.0.249.112/31 | 10.0.249.112 – 10.0.249.113 | 10.0.249.113 |
| 186 | 10.0.249.114/31 | 10.0.249.114 – 10.0.249.115 | 10.0.249.115 |
| 187 | 10.0.249.116/31 | 10.0.249.116 – 10.0.249.117 | 10.0.249.117 |
| 188 | 10.0.249.118/31 | 10.0.249.118 – 10.0.249.119 | 10.0.249.119 |
| 189 | 10.0.249.120/31 | 10.0.249.120 – 10.0.249.121 | 10.0.249.121 |
| 190 | 10.0.249.122/31 | 10.0.249.122 – 10.0.249.123 | 10.0.249.123 |
| 191 | 10.0.249.124/31 | 10.0.249.124 – 10.0.249.125 | 10.0.249.125 |
| 192 | 10.0.249.126/31 | 10.0.249.126 – 10.0.249.127 | 10.0.249.127 |
| 193 | 10.0.249.128/31 | 10.0.249.128 – 10.0.249.129 | 10.0.249.129 |
| 194 | 10.0.249.130/31 | 10.0.249.130 – 10.0.249.131 | 10.0.249.131 |
| 195 | 10.0.249.132/31 | 10.0.249.132 – 10.0.249.133 | 10.0.249.133 |
| 196 | 10.0.249.134/31 | 10.0.249.134 – 10.0.249.135 | 10.0.249.135 |
| 197 | 10.0.249.136/31 | 10.0.249.136 – 10.0.249.137 | 10.0.249.137 |
| 198 | 10.0.249.138/31 | 10.0.249.138 – 10.0.249.139 | 10.0.249.139 |
| 199 | 10.0.249.140/31 | 10.0.249.140 – 10.0.249.141 | 10.0.249.141 |
| 200 | 10.0.249.142/31 | 10.0.249.142 – 10.0.249.143 | 10.0.249.143 |
| 201 | 10.0.249.144/31 | 10.0.249.144 – 10.0.249.145 | 10.0.249.145 |
| 202 | 10.0.249.146/31 | 10.0.249.146 – 10.0.249.147 | 10.0.249.147 |
| 203 | 10.0.249.148/31 | 10.0.249.148 – 10.0.249.149 | 10.0.249.149 |
| 204 | 10.0.249.150/31 | 10.0.249.150 – 10.0.249.151 | 10.0.249.151 |
| 205 | 10.0.249.152/31 | 10.0.249.152 – 10.0.249.153 | 10.0.249.153 |
| 206 | 10.0.249.154/31 | 10.0.249.154 – 10.0.249.155 | 10.0.249.155 |
| 207 | 10.0.249.156/31 | 10.0.249.156 – 10.0.249.157 | 10.0.249.157 |
| 208 | 10.0.249.158/31 | 10.0.249.158 – 10.0.249.159 | 10.0.249.159 |
| 209 | 10.0.249.160/31 | 10.0.249.160 – 10.0.249.161 | 10.0.249.161 |
| 210 | 10.0.249.162/31 | 10.0.249.162 – 10.0.249.163 | 10.0.249.163 |
| 211 | 10.0.249.164/31 | 10.0.249.164 – 10.0.249.165 | 10.0.249.165 |
| 212 | 10.0.249.166/31 | 10.0.249.166 – 10.0.249.167 | 10.0.249.167 |
| 213 | 10.0.249.168/31 | 10.0.249.168 – 10.0.249.169 | 10.0.249.169 |
| 214 | 10.0.249.170/31 | 10.0.249.170 – 10.0.249.171 | 10.0.249.171 |
| 215 | 10.0.249.172/31 | 10.0.249.172 – 10.0.249.173 | 10.0.249.173 |
| 216 | 10.0.249.174/31 | 10.0.249.174 – 10.0.249.175 | 10.0.249.175 |
| 217 | 10.0.249.176/31 | 10.0.249.176 – 10.0.249.177 | 10.0.249.177 |
| 218 | 10.0.249.178/31 | 10.0.249.178 – 10.0.249.179 | 10.0.249.179 |
| 219 | 10.0.249.180/31 | 10.0.249.180 – 10.0.249.181 | 10.0.249.181 |
| 220 | 10.0.249.182/31 | 10.0.249.182 – 10.0.249.183 | 10.0.249.183 |
| 221 | 10.0.249.184/31 | 10.0.249.184 – 10.0.249.185 | 10.0.249.185 |
| 222 | 10.0.249.186/31 | 10.0.249.186 – 10.0.249.187 | 10.0.249.187 |
| 223 | 10.0.249.188/31 | 10.0.249.188 – 10.0.249.189 | 10.0.249.189 |
| 224 | 10.0.249.190/31 | 10.0.249.190 – 10.0.249.191 | 10.0.249.191 |
| 225 | 10.0.249.192/31 | 10.0.249.192 – 10.0.249.193 | 10.0.249.193 |
| 226 | 10.0.249.194/31 | 10.0.249.194 – 10.0.249.195 | 10.0.249.195 |
| 227 | 10.0.249.196/31 | 10.0.249.196 – 10.0.249.197 | 10.0.249.197 |
| 228 | 10.0.249.198/31 | 10.0.249.198 – 10.0.249.199 | 10.0.249.199 |
| 229 | 10.0.249.200/31 | 10.0.249.200 – 10.0.249.201 | 10.0.249.201 |
| 230 | 10.0.249.202/31 | 10.0.249.202 – 10.0.249.203 | 10.0.249.203 |
| 231 | 10.0.249.204/31 | 10.0.249.204 – 10.0.249.205 | 10.0.249.205 |
| 232 | 10.0.249.206/31 | 10.0.249.206 – 10.0.249.207 | 10.0.249.207 |
| 233 | 10.0.249.208/31 | 10.0.249.208 – 10.0.249.209 | 10.0.249.209 |
| 234 | 10.0.249.210/31 | 10.0.249.210 – 10.0.249.211 | 10.0.249.211 |
| 235 | 10.0.249.212/31 | 10.0.249.212 – 10.0.249.213 | 10.0.249.213 |
| 236 | 10.0.249.214/31 | 10.0.249.214 – 10.0.249.215 | 10.0.249.215 |
| 237 | 10.0.249.216/31 | 10.0.249.216 – 10.0.249.217 | 10.0.249.217 |
| 238 | 10.0.249.218/31 | 10.0.249.218 – 10.0.249.219 | 10.0.249.219 |
| 239 | 10.0.249.220/31 | 10.0.249.220 – 10.0.249.221 | 10.0.249.221 |
| 240 | 10.0.249.222/31 | 10.0.249.222 – 10.0.249.223 | 10.0.249.223 |
| 241 | 10.0.249.224/31 | 10.0.249.224 – 10.0.249.225 | 10.0.249.225 |
| 242 | 10.0.249.226/31 | 10.0.249.226 – 10.0.249.227 | 10.0.249.227 |
| 243 | 10.0.249.228/31 | 10.0.249.228 – 10.0.249.229 | 10.0.249.229 |
| 244 | 10.0.249.230/31 | 10.0.249.230 – 10.0.249.231 | 10.0.249.231 |
| 245 | 10.0.249.232/31 | 10.0.249.232 – 10.0.249.233 | 10.0.249.233 |
| 246 | 10.0.249.234/31 | 10.0.249.234 – 10.0.249.235 | 10.0.249.235 |
| 247 | 10.0.249.236/31 | 10.0.249.236 – 10.0.249.237 | 10.0.249.237 |
| 248 | 10.0.249.238/31 | 10.0.249.238 – 10.0.249.239 | 10.0.249.239 |
| 249 | 10.0.249.240/31 | 10.0.249.240 – 10.0.249.241 | 10.0.249.241 |
| 250 | 10.0.249.242/31 | 10.0.249.242 – 10.0.249.243 | 10.0.249.243 |
| 251 | 10.0.249.244/31 | 10.0.249.244 – 10.0.249.245 | 10.0.249.245 |
| 252 | 10.0.249.246/31 | 10.0.249.246 – 10.0.249.247 | 10.0.249.247 |
| 253 | 10.0.249.248/31 | 10.0.249.248 – 10.0.249.249 | 10.0.249.249 |
| 254 | 10.0.249.250/31 | 10.0.249.250 – 10.0.249.251 | 10.0.249.251 |
| 255 | 10.0.249.252/31 | 10.0.249.252 – 10.0.249.253 | 10.0.249.253 |
| 256 | 10.0.249.254/31 | 10.0.249.254 – 10.0.249.255 | 10.0.249.255 |
showing 256 of 1,024
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 /21 |
|---|---|---|---|---|
| /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 | - |
| /21 | 255.255.248.0 | 2,048 | 2,046 | 1 |
| /22 | 255.255.252.0 | 1,024 | 1,022 | 2 split → |
| /23 | 255.255.254.0 | 512 | 510 | 4 split → |
| /24 | 255.255.255.0 | 256 | 254 | 8 split → |
| /25 | 255.255.255.128 | 128 | 126 | 16 split → |
| /26 | 255.255.255.192 | 64 | 62 | 32 split → |
| /27 | 255.255.255.224 | 32 | 30 | 64 split → |
| /28 | 255.255.255.240 | 16 | 14 | 128 split → |
| /29 | 255.255.255.248 | 8 | 6 | 256 split → |
| /30 | 255.255.255.252 | 4 | 2 | 512 split → |
| /31 | 255.255.255.254 | 2 | 2 | 1,024 split → |
| /32 | 255.255.255.255 | 1 | 1 | 2,048 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.