IP subnet calculator
Type an address with its prefix or mask to see the network, its usable range and masks. Split it into smaller subnets, or look up any prefix in the reference tables.
Network67.167.212.0/22
Usable hosts1,022
Subnet mask255.255.252.0
Addresses1,024
- Network address
67.167.212.0- Broadcast address
67.167.215.255- First usable
67.167.212.1- Last usable
67.167.215.254- Usable hosts
- 1,022 (1,024 less the network and broadcast addresses)
- Subnet mask
255.255.252.0- Wildcard mask
0.0.3.255(Cisco ACLs, OSPF)- Prefix length
- /22
- Type
- Public public
- Old class
- A (default /8)
- As numbers
- Hex
43A7D400· Integer1135072256to1135073279 - Reverse DNS zones
212.167.67.in-addr.arpa213.167.67.in-addr.arpa214.167.67.in-addr.arpa215.167.67.in-addr.arpa
/22 is not on a 8-bit boundary, so it takes 4 /24 zones.
Binary
| Binary (network bits bold, host bits grey) | Dotted | |
|---|---|---|
| Address | 01000011.10100111.11010100.00000000 | 67.167.212.0 |
| Subnet mask | 11111111.11111111.11111100.00000000 | 255.255.252.0 |
| Network | 01000011.10100111.11010100.00000000 | 67.167.212.0 |
| Broadcast | 01000011.10100111.11010111.11111111 | 67.167.215.255 |
Split into smaller subnets
67.167.212.0/22 makes 1,024 subnets of /32; the first 256 are listed.
| # | Subnet | Usable hosts range | Broadcast | Hosts |
|---|---|---|---|---|
| 1 | 67.167.212.0/32 | 67.167.212.0 to 67.167.212.0 | — | 1 |
| 2 | 67.167.212.1/32 | 67.167.212.1 to 67.167.212.1 | — | 1 |
| 3 | 67.167.212.2/32 | 67.167.212.2 to 67.167.212.2 | — | 1 |
| 4 | 67.167.212.3/32 | 67.167.212.3 to 67.167.212.3 | — | 1 |
| 5 | 67.167.212.4/32 | 67.167.212.4 to 67.167.212.4 | — | 1 |
| 6 | 67.167.212.5/32 | 67.167.212.5 to 67.167.212.5 | — | 1 |
| 7 | 67.167.212.6/32 | 67.167.212.6 to 67.167.212.6 | — | 1 |
| 8 | 67.167.212.7/32 | 67.167.212.7 to 67.167.212.7 | — | 1 |
| 9 | 67.167.212.8/32 | 67.167.212.8 to 67.167.212.8 | — | 1 |
| 10 | 67.167.212.9/32 | 67.167.212.9 to 67.167.212.9 | — | 1 |
| 11 | 67.167.212.10/32 | 67.167.212.10 to 67.167.212.10 | — | 1 |
| 12 | 67.167.212.11/32 | 67.167.212.11 to 67.167.212.11 | — | 1 |
| 13 | 67.167.212.12/32 | 67.167.212.12 to 67.167.212.12 | — | 1 |
| 14 | 67.167.212.13/32 | 67.167.212.13 to 67.167.212.13 | — | 1 |
| 15 | 67.167.212.14/32 | 67.167.212.14 to 67.167.212.14 | — | 1 |
| 16 | 67.167.212.15/32 | 67.167.212.15 to 67.167.212.15 | — | 1 |
| 17 | 67.167.212.16/32 | 67.167.212.16 to 67.167.212.16 | — | 1 |
| 18 | 67.167.212.17/32 | 67.167.212.17 to 67.167.212.17 | — | 1 |
| 19 | 67.167.212.18/32 | 67.167.212.18 to 67.167.212.18 | — | 1 |
| 20 | 67.167.212.19/32 | 67.167.212.19 to 67.167.212.19 | — | 1 |
| 21 | 67.167.212.20/32 | 67.167.212.20 to 67.167.212.20 | — | 1 |
| 22 | 67.167.212.21/32 | 67.167.212.21 to 67.167.212.21 | — | 1 |
| 23 | 67.167.212.22/32 | 67.167.212.22 to 67.167.212.22 | — | 1 |
| 24 | 67.167.212.23/32 | 67.167.212.23 to 67.167.212.23 | — | 1 |
| 25 | 67.167.212.24/32 | 67.167.212.24 to 67.167.212.24 | — | 1 |
| 26 | 67.167.212.25/32 | 67.167.212.25 to 67.167.212.25 | — | 1 |
| 27 | 67.167.212.26/32 | 67.167.212.26 to 67.167.212.26 | — | 1 |
| 28 | 67.167.212.27/32 | 67.167.212.27 to 67.167.212.27 | — | 1 |
| 29 | 67.167.212.28/32 | 67.167.212.28 to 67.167.212.28 | — | 1 |
| 30 | 67.167.212.29/32 | 67.167.212.29 to 67.167.212.29 | — | 1 |
| 31 | 67.167.212.30/32 | 67.167.212.30 to 67.167.212.30 | — | 1 |
| 32 | 67.167.212.31/32 | 67.167.212.31 to 67.167.212.31 | — | 1 |
| 33 | 67.167.212.32/32 | 67.167.212.32 to 67.167.212.32 | — | 1 |
| 34 | 67.167.212.33/32 | 67.167.212.33 to 67.167.212.33 | — | 1 |
| 35 | 67.167.212.34/32 | 67.167.212.34 to 67.167.212.34 | — | 1 |
| 36 | 67.167.212.35/32 | 67.167.212.35 to 67.167.212.35 | — | 1 |
| 37 | 67.167.212.36/32 | 67.167.212.36 to 67.167.212.36 | — | 1 |
| 38 | 67.167.212.37/32 | 67.167.212.37 to 67.167.212.37 | — | 1 |
| 39 | 67.167.212.38/32 | 67.167.212.38 to 67.167.212.38 | — | 1 |
| 40 | 67.167.212.39/32 | 67.167.212.39 to 67.167.212.39 | — | 1 |
| 41 | 67.167.212.40/32 | 67.167.212.40 to 67.167.212.40 | — | 1 |
| 42 | 67.167.212.41/32 | 67.167.212.41 to 67.167.212.41 | — | 1 |
| 43 | 67.167.212.42/32 | 67.167.212.42 to 67.167.212.42 | — | 1 |
| 44 | 67.167.212.43/32 | 67.167.212.43 to 67.167.212.43 | — | 1 |
| 45 | 67.167.212.44/32 | 67.167.212.44 to 67.167.212.44 | — | 1 |
| 46 | 67.167.212.45/32 | 67.167.212.45 to 67.167.212.45 | — | 1 |
| 47 | 67.167.212.46/32 | 67.167.212.46 to 67.167.212.46 | — | 1 |
| 48 | 67.167.212.47/32 | 67.167.212.47 to 67.167.212.47 | — | 1 |
| 49 | 67.167.212.48/32 | 67.167.212.48 to 67.167.212.48 | — | 1 |
| 50 | 67.167.212.49/32 | 67.167.212.49 to 67.167.212.49 | — | 1 |
| 51 | 67.167.212.50/32 | 67.167.212.50 to 67.167.212.50 | — | 1 |
| 52 | 67.167.212.51/32 | 67.167.212.51 to 67.167.212.51 | — | 1 |
| 53 | 67.167.212.52/32 | 67.167.212.52 to 67.167.212.52 | — | 1 |
| 54 | 67.167.212.53/32 | 67.167.212.53 to 67.167.212.53 | — | 1 |
| 55 | 67.167.212.54/32 | 67.167.212.54 to 67.167.212.54 | — | 1 |
| 56 | 67.167.212.55/32 | 67.167.212.55 to 67.167.212.55 | — | 1 |
| 57 | 67.167.212.56/32 | 67.167.212.56 to 67.167.212.56 | — | 1 |
| 58 | 67.167.212.57/32 | 67.167.212.57 to 67.167.212.57 | — | 1 |
| 59 | 67.167.212.58/32 | 67.167.212.58 to 67.167.212.58 | — | 1 |
| 60 | 67.167.212.59/32 | 67.167.212.59 to 67.167.212.59 | — | 1 |
| 61 | 67.167.212.60/32 | 67.167.212.60 to 67.167.212.60 | — | 1 |
| 62 | 67.167.212.61/32 | 67.167.212.61 to 67.167.212.61 | — | 1 |
| 63 | 67.167.212.62/32 | 67.167.212.62 to 67.167.212.62 | — | 1 |
| 64 | 67.167.212.63/32 | 67.167.212.63 to 67.167.212.63 | — | 1 |
| 65 | 67.167.212.64/32 | 67.167.212.64 to 67.167.212.64 | — | 1 |
| 66 | 67.167.212.65/32 | 67.167.212.65 to 67.167.212.65 | — | 1 |
| 67 | 67.167.212.66/32 | 67.167.212.66 to 67.167.212.66 | — | 1 |
| 68 | 67.167.212.67/32 | 67.167.212.67 to 67.167.212.67 | — | 1 |
| 69 | 67.167.212.68/32 | 67.167.212.68 to 67.167.212.68 | — | 1 |
| 70 | 67.167.212.69/32 | 67.167.212.69 to 67.167.212.69 | — | 1 |
| 71 | 67.167.212.70/32 | 67.167.212.70 to 67.167.212.70 | — | 1 |
| 72 | 67.167.212.71/32 | 67.167.212.71 to 67.167.212.71 | — | 1 |
| 73 | 67.167.212.72/32 | 67.167.212.72 to 67.167.212.72 | — | 1 |
| 74 | 67.167.212.73/32 | 67.167.212.73 to 67.167.212.73 | — | 1 |
| 75 | 67.167.212.74/32 | 67.167.212.74 to 67.167.212.74 | — | 1 |
| 76 | 67.167.212.75/32 | 67.167.212.75 to 67.167.212.75 | — | 1 |
| 77 | 67.167.212.76/32 | 67.167.212.76 to 67.167.212.76 | — | 1 |
| 78 | 67.167.212.77/32 | 67.167.212.77 to 67.167.212.77 | — | 1 |
| 79 | 67.167.212.78/32 | 67.167.212.78 to 67.167.212.78 | — | 1 |
| 80 | 67.167.212.79/32 | 67.167.212.79 to 67.167.212.79 | — | 1 |
| 81 | 67.167.212.80/32 | 67.167.212.80 to 67.167.212.80 | — | 1 |
| 82 | 67.167.212.81/32 | 67.167.212.81 to 67.167.212.81 | — | 1 |
| 83 | 67.167.212.82/32 | 67.167.212.82 to 67.167.212.82 | — | 1 |
| 84 | 67.167.212.83/32 | 67.167.212.83 to 67.167.212.83 | — | 1 |
| 85 | 67.167.212.84/32 | 67.167.212.84 to 67.167.212.84 | — | 1 |
| 86 | 67.167.212.85/32 | 67.167.212.85 to 67.167.212.85 | — | 1 |
| 87 | 67.167.212.86/32 | 67.167.212.86 to 67.167.212.86 | — | 1 |
| 88 | 67.167.212.87/32 | 67.167.212.87 to 67.167.212.87 | — | 1 |
| 89 | 67.167.212.88/32 | 67.167.212.88 to 67.167.212.88 | — | 1 |
| 90 | 67.167.212.89/32 | 67.167.212.89 to 67.167.212.89 | — | 1 |
| 91 | 67.167.212.90/32 | 67.167.212.90 to 67.167.212.90 | — | 1 |
| 92 | 67.167.212.91/32 | 67.167.212.91 to 67.167.212.91 | — | 1 |
| 93 | 67.167.212.92/32 | 67.167.212.92 to 67.167.212.92 | — | 1 |
| 94 | 67.167.212.93/32 | 67.167.212.93 to 67.167.212.93 | — | 1 |
| 95 | 67.167.212.94/32 | 67.167.212.94 to 67.167.212.94 | — | 1 |
| 96 | 67.167.212.95/32 | 67.167.212.95 to 67.167.212.95 | — | 1 |
| 97 | 67.167.212.96/32 | 67.167.212.96 to 67.167.212.96 | — | 1 |
| 98 | 67.167.212.97/32 | 67.167.212.97 to 67.167.212.97 | — | 1 |
| 99 | 67.167.212.98/32 | 67.167.212.98 to 67.167.212.98 | — | 1 |
| 100 | 67.167.212.99/32 | 67.167.212.99 to 67.167.212.99 | — | 1 |
| 101 | 67.167.212.100/32 | 67.167.212.100 to 67.167.212.100 | — | 1 |
| 102 | 67.167.212.101/32 | 67.167.212.101 to 67.167.212.101 | — | 1 |
| 103 | 67.167.212.102/32 | 67.167.212.102 to 67.167.212.102 | — | 1 |
| 104 | 67.167.212.103/32 | 67.167.212.103 to 67.167.212.103 | — | 1 |
| 105 | 67.167.212.104/32 | 67.167.212.104 to 67.167.212.104 | — | 1 |
| 106 | 67.167.212.105/32 | 67.167.212.105 to 67.167.212.105 | — | 1 |
| 107 | 67.167.212.106/32 | 67.167.212.106 to 67.167.212.106 | — | 1 |
| 108 | 67.167.212.107/32 | 67.167.212.107 to 67.167.212.107 | — | 1 |
| 109 | 67.167.212.108/32 | 67.167.212.108 to 67.167.212.108 | — | 1 |
| 110 | 67.167.212.109/32 | 67.167.212.109 to 67.167.212.109 | — | 1 |
| 111 | 67.167.212.110/32 | 67.167.212.110 to 67.167.212.110 | — | 1 |
| 112 | 67.167.212.111/32 | 67.167.212.111 to 67.167.212.111 | — | 1 |
| 113 | 67.167.212.112/32 | 67.167.212.112 to 67.167.212.112 | — | 1 |
| 114 | 67.167.212.113/32 | 67.167.212.113 to 67.167.212.113 | — | 1 |
| 115 | 67.167.212.114/32 | 67.167.212.114 to 67.167.212.114 | — | 1 |
| 116 | 67.167.212.115/32 | 67.167.212.115 to 67.167.212.115 | — | 1 |
| 117 | 67.167.212.116/32 | 67.167.212.116 to 67.167.212.116 | — | 1 |
| 118 | 67.167.212.117/32 | 67.167.212.117 to 67.167.212.117 | — | 1 |
| 119 | 67.167.212.118/32 | 67.167.212.118 to 67.167.212.118 | — | 1 |
| 120 | 67.167.212.119/32 | 67.167.212.119 to 67.167.212.119 | — | 1 |
| 121 | 67.167.212.120/32 | 67.167.212.120 to 67.167.212.120 | — | 1 |
| 122 | 67.167.212.121/32 | 67.167.212.121 to 67.167.212.121 | — | 1 |
| 123 | 67.167.212.122/32 | 67.167.212.122 to 67.167.212.122 | — | 1 |
| 124 | 67.167.212.123/32 | 67.167.212.123 to 67.167.212.123 | — | 1 |
| 125 | 67.167.212.124/32 | 67.167.212.124 to 67.167.212.124 | — | 1 |
| 126 | 67.167.212.125/32 | 67.167.212.125 to 67.167.212.125 | — | 1 |
| 127 | 67.167.212.126/32 | 67.167.212.126 to 67.167.212.126 | — | 1 |
| 128 | 67.167.212.127/32 | 67.167.212.127 to 67.167.212.127 | — | 1 |
| 129 | 67.167.212.128/32 | 67.167.212.128 to 67.167.212.128 | — | 1 |
| 130 | 67.167.212.129/32 | 67.167.212.129 to 67.167.212.129 | — | 1 |
| 131 | 67.167.212.130/32 | 67.167.212.130 to 67.167.212.130 | — | 1 |
| 132 | 67.167.212.131/32 | 67.167.212.131 to 67.167.212.131 | — | 1 |
| 133 | 67.167.212.132/32 | 67.167.212.132 to 67.167.212.132 | — | 1 |
| 134 | 67.167.212.133/32 | 67.167.212.133 to 67.167.212.133 | — | 1 |
| 135 | 67.167.212.134/32 | 67.167.212.134 to 67.167.212.134 | — | 1 |
| 136 | 67.167.212.135/32 | 67.167.212.135 to 67.167.212.135 | — | 1 |
| 137 | 67.167.212.136/32 | 67.167.212.136 to 67.167.212.136 | — | 1 |
| 138 | 67.167.212.137/32 | 67.167.212.137 to 67.167.212.137 | — | 1 |
| 139 | 67.167.212.138/32 | 67.167.212.138 to 67.167.212.138 | — | 1 |
| 140 | 67.167.212.139/32 | 67.167.212.139 to 67.167.212.139 | — | 1 |
| 141 | 67.167.212.140/32 | 67.167.212.140 to 67.167.212.140 | — | 1 |
| 142 | 67.167.212.141/32 | 67.167.212.141 to 67.167.212.141 | — | 1 |
| 143 | 67.167.212.142/32 | 67.167.212.142 to 67.167.212.142 | — | 1 |
| 144 | 67.167.212.143/32 | 67.167.212.143 to 67.167.212.143 | — | 1 |
| 145 | 67.167.212.144/32 | 67.167.212.144 to 67.167.212.144 | — | 1 |
| 146 | 67.167.212.145/32 | 67.167.212.145 to 67.167.212.145 | — | 1 |
| 147 | 67.167.212.146/32 | 67.167.212.146 to 67.167.212.146 | — | 1 |
| 148 | 67.167.212.147/32 | 67.167.212.147 to 67.167.212.147 | — | 1 |
| 149 | 67.167.212.148/32 | 67.167.212.148 to 67.167.212.148 | — | 1 |
| 150 | 67.167.212.149/32 | 67.167.212.149 to 67.167.212.149 | — | 1 |
| 151 | 67.167.212.150/32 | 67.167.212.150 to 67.167.212.150 | — | 1 |
| 152 | 67.167.212.151/32 | 67.167.212.151 to 67.167.212.151 | — | 1 |
| 153 | 67.167.212.152/32 | 67.167.212.152 to 67.167.212.152 | — | 1 |
| 154 | 67.167.212.153/32 | 67.167.212.153 to 67.167.212.153 | — | 1 |
| 155 | 67.167.212.154/32 | 67.167.212.154 to 67.167.212.154 | — | 1 |
| 156 | 67.167.212.155/32 | 67.167.212.155 to 67.167.212.155 | — | 1 |
| 157 | 67.167.212.156/32 | 67.167.212.156 to 67.167.212.156 | — | 1 |
| 158 | 67.167.212.157/32 | 67.167.212.157 to 67.167.212.157 | — | 1 |
| 159 | 67.167.212.158/32 | 67.167.212.158 to 67.167.212.158 | — | 1 |
| 160 | 67.167.212.159/32 | 67.167.212.159 to 67.167.212.159 | — | 1 |
| 161 | 67.167.212.160/32 | 67.167.212.160 to 67.167.212.160 | — | 1 |
| 162 | 67.167.212.161/32 | 67.167.212.161 to 67.167.212.161 | — | 1 |
| 163 | 67.167.212.162/32 | 67.167.212.162 to 67.167.212.162 | — | 1 |
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| 167 | 67.167.212.166/32 | 67.167.212.166 to 67.167.212.166 | — | 1 |
| 168 | 67.167.212.167/32 | 67.167.212.167 to 67.167.212.167 | — | 1 |
| 169 | 67.167.212.168/32 | 67.167.212.168 to 67.167.212.168 | — | 1 |
| 170 | 67.167.212.169/32 | 67.167.212.169 to 67.167.212.169 | — | 1 |
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| 218 | 67.167.212.217/32 | 67.167.212.217 to 67.167.212.217 | — | 1 |
| 219 | 67.167.212.218/32 | 67.167.212.218 to 67.167.212.218 | — | 1 |
| 220 | 67.167.212.219/32 | 67.167.212.219 to 67.167.212.219 | — | 1 |
| 221 | 67.167.212.220/32 | 67.167.212.220 to 67.167.212.220 | — | 1 |
| 222 | 67.167.212.221/32 | 67.167.212.221 to 67.167.212.221 | — | 1 |
| 223 | 67.167.212.222/32 | 67.167.212.222 to 67.167.212.222 | — | 1 |
| 224 | 67.167.212.223/32 | 67.167.212.223 to 67.167.212.223 | — | 1 |
| 225 | 67.167.212.224/32 | 67.167.212.224 to 67.167.212.224 | — | 1 |
| 226 | 67.167.212.225/32 | 67.167.212.225 to 67.167.212.225 | — | 1 |
| 227 | 67.167.212.226/32 | 67.167.212.226 to 67.167.212.226 | — | 1 |
| 228 | 67.167.212.227/32 | 67.167.212.227 to 67.167.212.227 | — | 1 |
| 229 | 67.167.212.228/32 | 67.167.212.228 to 67.167.212.228 | — | 1 |
| 230 | 67.167.212.229/32 | 67.167.212.229 to 67.167.212.229 | — | 1 |
| 231 | 67.167.212.230/32 | 67.167.212.230 to 67.167.212.230 | — | 1 |
| 232 | 67.167.212.231/32 | 67.167.212.231 to 67.167.212.231 | — | 1 |
| 233 | 67.167.212.232/32 | 67.167.212.232 to 67.167.212.232 | — | 1 |
| 234 | 67.167.212.233/32 | 67.167.212.233 to 67.167.212.233 | — | 1 |
| 235 | 67.167.212.234/32 | 67.167.212.234 to 67.167.212.234 | — | 1 |
| 236 | 67.167.212.235/32 | 67.167.212.235 to 67.167.212.235 | — | 1 |
| 237 | 67.167.212.236/32 | 67.167.212.236 to 67.167.212.236 | — | 1 |
| 238 | 67.167.212.237/32 | 67.167.212.237 to 67.167.212.237 | — | 1 |
| 239 | 67.167.212.238/32 | 67.167.212.238 to 67.167.212.238 | — | 1 |
| 240 | 67.167.212.239/32 | 67.167.212.239 to 67.167.212.239 | — | 1 |
| 241 | 67.167.212.240/32 | 67.167.212.240 to 67.167.212.240 | — | 1 |
| 242 | 67.167.212.241/32 | 67.167.212.241 to 67.167.212.241 | — | 1 |
| 243 | 67.167.212.242/32 | 67.167.212.242 to 67.167.212.242 | — | 1 |
| 244 | 67.167.212.243/32 | 67.167.212.243 to 67.167.212.243 | — | 1 |
| 245 | 67.167.212.244/32 | 67.167.212.244 to 67.167.212.244 | — | 1 |
| 246 | 67.167.212.245/32 | 67.167.212.245 to 67.167.212.245 | — | 1 |
| 247 | 67.167.212.246/32 | 67.167.212.246 to 67.167.212.246 | — | 1 |
| 248 | 67.167.212.247/32 | 67.167.212.247 to 67.167.212.247 | — | 1 |
| 249 | 67.167.212.248/32 | 67.167.212.248 to 67.167.212.248 | — | 1 |
| 250 | 67.167.212.249/32 | 67.167.212.249 to 67.167.212.249 | — | 1 |
| 251 | 67.167.212.250/32 | 67.167.212.250 to 67.167.212.250 | — | 1 |
| 252 | 67.167.212.251/32 | 67.167.212.251 to 67.167.212.251 | — | 1 |
| 253 | 67.167.212.252/32 | 67.167.212.252 to 67.167.212.252 | — | 1 |
| 254 | 67.167.212.253/32 | 67.167.212.253 to 67.167.212.253 | — | 1 |
| 255 | 67.167.212.254/32 | 67.167.212.254 to 67.167.212.254 | — | 1 |
| 256 | 67.167.212.255/32 | 67.167.212.255 to 67.167.212.255 | — | 1 |
IPv4 CIDR reference (/0 to /32)
| Prefix | Subnet mask | Wildcard | Addresses | Usable hosts | Size | Typical use |
|---|---|---|---|---|---|---|
| /0 | 0.0.0.0 | 255.255.255.255 | 4,294,967,296 | 4,294,967,294 | 16,777,216 × /24 | |
| /1 | 128.0.0.0 | 127.255.255.255 | 2,147,483,648 | 2,147,483,646 | 8,388,608 × /24 | |
| /2 | 192.0.0.0 | 63.255.255.255 | 1,073,741,824 | 1,073,741,822 | 4,194,304 × /24 | |
| /3 | 224.0.0.0 | 31.255.255.255 | 536,870,912 | 536,870,910 | 2,097,152 × /24 | |
| /4 | 240.0.0.0 | 15.255.255.255 | 268,435,456 | 268,435,454 | 1,048,576 × /24 | |
| /5 | 248.0.0.0 | 7.255.255.255 | 134,217,728 | 134,217,726 | 524,288 × /24 | |
| /6 | 252.0.0.0 | 3.255.255.255 | 67,108,864 | 67,108,862 | 262,144 × /24 | |
| /7 | 254.0.0.0 | 1.255.255.255 | 33,554,432 | 33,554,430 | 131,072 × /24 | |
| /8 | 255.0.0.0 | 0.255.255.255 | 16,777,216 | 16,777,214 | 65,536 × /24 | Old class A; 10.0.0.0/8 |
| /9 | 255.128.0.0 | 0.127.255.255 | 8,388,608 | 8,388,606 | 32,768 × /24 | |
| /10 | 255.192.0.0 | 0.63.255.255 | 4,194,304 | 4,194,302 | 16,384 × /24 | |
| /11 | 255.224.0.0 | 0.31.255.255 | 2,097,152 | 2,097,150 | 8,192 × /24 | |
| /12 | 255.240.0.0 | 0.15.255.255 | 1,048,576 | 1,048,574 | 4,096 × /24 | 172.16.0.0/12 |
| /13 | 255.248.0.0 | 0.7.255.255 | 524,288 | 524,286 | 2,048 × /24 | |
| /14 | 255.252.0.0 | 0.3.255.255 | 262,144 | 262,142 | 1,024 × /24 | |
| /15 | 255.254.0.0 | 0.1.255.255 | 131,072 | 131,070 | 512 × /24 | |
| /16 | 255.255.0.0 | 0.0.255.255 | 65,536 | 65,534 | 256 × /24 | Old class B; 192.168.0.0/16 |
| /17 | 255.255.128.0 | 0.0.127.255 | 32,768 | 32,766 | 128 × /24 | |
| /18 | 255.255.192.0 | 0.0.63.255 | 16,384 | 16,382 | 64 × /24 | |
| /19 | 255.255.224.0 | 0.0.31.255 | 8,192 | 8,190 | 32 × /24 | |
| /20 | 255.255.240.0 | 0.0.15.255 | 4,096 | 4,094 | 16 × /24 | |
| /21 | 255.255.248.0 | 0.0.7.255 | 2,048 | 2,046 | 8 × /24 | |
| /22 | 255.255.252.0 | 0.0.3.255 | 1,024 | 1,022 | 4 × /24 | Large office or guest Wi-Fi (1,022 hosts) |
| /23 | 255.255.254.0 | 0.0.1.255 | 512 | 510 | 2 × /24 | Larger office LAN (510 hosts) |
| /24 | 255.255.255.0 | 0.0.0.255 | 256 | 254 | 1 × /24 | Typical office LAN (old class C) |
| /25 | 255.255.255.128 | 0.0.0.127 | 128 | 126 | 1/2 of a /24 | Smaller LAN or VLAN |
| /26 | 255.255.255.192 | 0.0.0.63 | 64 | 62 | 1/4 of a /24 | Smaller LAN or VLAN |
| /27 | 255.255.255.224 | 0.0.0.31 | 32 | 30 | 1/8 of a /24 | Small VLAN, phones, cameras |
| /28 | 255.255.255.240 | 0.0.0.15 | 16 | 14 | 1/16 of a /24 | Small VLAN, phones, cameras |
| /29 | 255.255.255.248 | 0.0.0.7 | 8 | 6 | 1/32 of a /24 | Small fixed public block (5 usable) |
| /30 | 255.255.255.252 | 0.0.0.3 | 4 | 2 | 1/64 of a /24 | Point-to-point (old style) |
| /31 | 255.255.255.254 | 0.0.0.1 | 2 | 2 | 1/128 of a /24 | Point-to-point link (RFC 3021) |
| /32 | 255.255.255.255 | 0.0.0.0 | 1 | 1 | 1/256 of a /24 | One host |
IPv6 prefix reference
| Prefix | Addresses | /64 LANs | /48 sites | Nibble | Typical use |
|---|---|---|---|---|---|
| /3 | 42,535,295,865,117,307,932,921,825,928,971,026,432 (2^125) | 2,305,843,009,213,693,952 | 35,184,372,088,832 | No | All global unicast (2000::/3) |
| /16 | 5,192,296,858,534,827,628,530,496,329,220,096 (2^112) | 281,474,976,710,656 | 4,294,967,296 | Yes | |
| /20 | 324,518,553,658,426,726,783,156,020,576,256 (2^108) | 17,592,186,044,416 | 268,435,456 | Yes | Large provider allocation (RIPE minimum for some) |
| /29 | 633,825,300,114,114,700,748,351,602,688 (2^99) | 34,359,738,368 | 524,288 | No | RIPE allocation to a provider (often) |
| /32 | 79,228,162,514,264,337,593,543,950,336 (2^96) | 4,294,967,296 | 65,536 | Yes | Provider allocation (RIPE default) |
| /36 | 4,951,760,157,141,521,099,596,496,896 (2^92) | 268,435,456 | 4,096 | Yes | |
| /40 | 309,485,009,821,345,068,724,781,056 (2^88) | 16,777,216 | 256 | Yes | |
| /44 | 19,342,813,113,834,066,795,298,816 (2^84) | 1,048,576 | 16 | Yes | |
| /48 | 1,208,925,819,614,629,174,706,176 (2^80) | 65,536 | 1 | Yes | One site or organisation (RIPE PI / assignment) |
| /52 | 75,557,863,725,914,323,419,136 (2^76) | 4,096 | Yes | ||
| /56 | 4,722,366,482,869,645,213,696 (2^72) | 256 | Yes | Small site or home (common provider assignment) | |
| /60 | 295,147,905,179,352,825,856 (2^68) | 16 | Yes | Some home broadband (16 LANs) | |
| /64 | 18,446,744,073,709,551,616 (2^64) | 1 | Yes | One LAN or VLAN (needed for SLAAC) | |
| /72 | 72,057,594,037,927,936 (2^56) | 1/256 of a /64 | Yes | ||
| /80 | 281,474,976,710,656 (2^48) | 1/65,536 of a /64 | Yes | ||
| /96 | 4,294,967,296 | 1/4,294,967,296 of a /64 | Yes | Embeds an IPv4 address (NAT64) | |
| /112 | 65,536 | 1/281,474,976,710,656 of a /64 | Yes | ||
| /120 | 256 | 1/72,057,594,037,927,936 of a /64 | Yes | ||
| /124 | 16 | 1/1,152,921,504,606,846,976 of a /64 | Yes | ||
| /126 | 4 | 1/4,611,686,018,427,387,904 of a /64 | No | ||
| /127 | 2 | 1/9,223,372,036,854,775,808 of a /64 | No | Point-to-point link (RFC 6164) | |
| /128 | 1 | 1/18,446,744,073,709,551,616 of a /64 | Yes | One host or loopback |
Private and special ranges
IPv4
| Range | Name | What it is |
|---|---|---|
255.255.255.255/32 | Limited broadcast | Every host on the local network |
0.0.0.0/8 | This network | Not routed; 0.0.0.0 means "any address" in settings |
10.0.0.0/8 | Private (RFC 1918) | Office and home networks; not routed on the internet |
100.64.0.0/10 | Shared address space (CGNAT) | Used by providers behind carrier-grade NAT (RFC 6598) |
127.0.0.0/8 | Loopback | This computer |
169.254.0.0/16 | Link-local (APIPA) | Self-assigned when no DHCP server answers |
172.16.0.0/12 | Private (RFC 1918) | Office and home networks; not routed on the internet |
192.0.0.0/24 | IETF protocol assignments | Special uses such as DS-Lite |
192.0.2.0/24 | Documentation (TEST-NET-1) | For examples; never used on a network |
192.88.99.0/24 | 6to4 relay (deprecated) | Formerly anycast for 6to4 |
192.168.0.0/16 | Private (RFC 1918) | Office and home networks; not routed on the internet |
198.18.0.0/15 | Benchmarking | Network equipment testing (RFC 2544) |
198.51.100.0/24 | Documentation (TEST-NET-2) | For examples; never used on a network |
203.0.113.0/24 | Documentation (TEST-NET-3) | For examples; never used on a network |
224.0.0.0/4 | Multicast | One-to-many traffic, such as IPTV and routing protocols |
240.0.0.0/4 | Reserved | Future use; not usable on most systems |
IPv6
| Range | Name | What it is |
|---|---|---|
::/128 | Unspecified | No address; :: means "any address" in settings |
::1/128 | Loopback | This computer |
::ffff:0:0/96 | IPv4-mapped | An IPv4 address written as IPv6 |
64:ff9b::/96 | NAT64 | IPv4 addresses reached through a NAT64 gateway |
100::/64 | Discard only | Traffic sent here is dropped (RFC 6666) |
2001:db8::/32 | Documentation | For examples; never used on a network |
2001::/32 | Teredo | IPv6 tunnelled over IPv4 UDP |
2002::/16 | 6to4 | IPv6 tunnelled over IPv4 (largely retired) |
3fff::/20 | Documentation | For examples (RFC 9637) |
fc00::/7 | Unique local (ULA) | Private IPv6, like RFC 1918; usually fd00::/8 |
fe80::/10 | Link-local | Every IPv6 interface has one; not routed |
ff00::/8 | Multicast | One-to-many traffic; replaces broadcast |
2000::/3 | Global unicast | Public internet addresses |