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.
Network222.0.64.0/20
Usable hosts4,094
Subnet mask255.255.240.0
Addresses4,096
- Network address
222.0.64.0- Broadcast address
222.0.79.255- First usable
222.0.64.1- Last usable
222.0.79.254- Usable hosts
- 4,094 (4,096 less the network and broadcast addresses)
- Subnet mask
255.255.240.0- Wildcard mask
0.0.15.255(Cisco ACLs, OSPF)- Prefix length
- /20
- Type
- Public public
- Old class
- C (default /24)
- As numbers
- Hex
DE004000· Integer3724558336to3724562431 - Reverse DNS zones
64.0.222.in-addr.arpa65.0.222.in-addr.arpa66.0.222.in-addr.arpa67.0.222.in-addr.arpa68.0.222.in-addr.arpa69.0.222.in-addr.arpa70.0.222.in-addr.arpa71.0.222.in-addr.arpa72.0.222.in-addr.arpa73.0.222.in-addr.arpa74.0.222.in-addr.arpa75.0.222.in-addr.arpa76.0.222.in-addr.arpa77.0.222.in-addr.arpa78.0.222.in-addr.arpa79.0.222.in-addr.arpa
/20 is not on a 8-bit boundary, so it takes 16 /24 zones.
Binary
| Binary (network bits bold, host bits grey) | Dotted | |
|---|---|---|
| Address | 11011110.00000000.01000000.00000000 | 222.0.64.0 |
| Subnet mask | 11111111.11111111.11110000.00000000 | 255.255.240.0 |
| Network | 11011110.00000000.01000000.00000000 | 222.0.64.0 |
| Broadcast | 11011110.00000000.01001111.11111111 | 222.0.79.255 |
Split into smaller subnets
/21 (2)/22 (4)/23 (8)/24 (16)/25 (32)/26 (64)/27 (128)/28 (256)/29 (512)/30 (1,024)/31 (2,048)/32 (4,096)
222.0.64.0/20 makes 4,096 subnets of /32; the first 256 are listed.
| # | Subnet | Usable hosts range | Broadcast | Hosts |
|---|---|---|---|---|
| 1 | 222.0.64.0/32 | 222.0.64.0 to 222.0.64.0 | — | 1 |
| 2 | 222.0.64.1/32 | 222.0.64.1 to 222.0.64.1 | — | 1 |
| 3 | 222.0.64.2/32 | 222.0.64.2 to 222.0.64.2 | — | 1 |
| 4 | 222.0.64.3/32 | 222.0.64.3 to 222.0.64.3 | — | 1 |
| 5 | 222.0.64.4/32 | 222.0.64.4 to 222.0.64.4 | — | 1 |
| 6 | 222.0.64.5/32 | 222.0.64.5 to 222.0.64.5 | — | 1 |
| 7 | 222.0.64.6/32 | 222.0.64.6 to 222.0.64.6 | — | 1 |
| 8 | 222.0.64.7/32 | 222.0.64.7 to 222.0.64.7 | — | 1 |
| 9 | 222.0.64.8/32 | 222.0.64.8 to 222.0.64.8 | — | 1 |
| 10 | 222.0.64.9/32 | 222.0.64.9 to 222.0.64.9 | — | 1 |
| 11 | 222.0.64.10/32 | 222.0.64.10 to 222.0.64.10 | — | 1 |
| 12 | 222.0.64.11/32 | 222.0.64.11 to 222.0.64.11 | — | 1 |
| 13 | 222.0.64.12/32 | 222.0.64.12 to 222.0.64.12 | — | 1 |
| 14 | 222.0.64.13/32 | 222.0.64.13 to 222.0.64.13 | — | 1 |
| 15 | 222.0.64.14/32 | 222.0.64.14 to 222.0.64.14 | — | 1 |
| 16 | 222.0.64.15/32 | 222.0.64.15 to 222.0.64.15 | — | 1 |
| 17 | 222.0.64.16/32 | 222.0.64.16 to 222.0.64.16 | — | 1 |
| 18 | 222.0.64.17/32 | 222.0.64.17 to 222.0.64.17 | — | 1 |
| 19 | 222.0.64.18/32 | 222.0.64.18 to 222.0.64.18 | — | 1 |
| 20 | 222.0.64.19/32 | 222.0.64.19 to 222.0.64.19 | — | 1 |
| 21 | 222.0.64.20/32 | 222.0.64.20 to 222.0.64.20 | — | 1 |
| 22 | 222.0.64.21/32 | 222.0.64.21 to 222.0.64.21 | — | 1 |
| 23 | 222.0.64.22/32 | 222.0.64.22 to 222.0.64.22 | — | 1 |
| 24 | 222.0.64.23/32 | 222.0.64.23 to 222.0.64.23 | — | 1 |
| 25 | 222.0.64.24/32 | 222.0.64.24 to 222.0.64.24 | — | 1 |
| 26 | 222.0.64.25/32 | 222.0.64.25 to 222.0.64.25 | — | 1 |
| 27 | 222.0.64.26/32 | 222.0.64.26 to 222.0.64.26 | — | 1 |
| 28 | 222.0.64.27/32 | 222.0.64.27 to 222.0.64.27 | — | 1 |
| 29 | 222.0.64.28/32 | 222.0.64.28 to 222.0.64.28 | — | 1 |
| 30 | 222.0.64.29/32 | 222.0.64.29 to 222.0.64.29 | — | 1 |
| 31 | 222.0.64.30/32 | 222.0.64.30 to 222.0.64.30 | — | 1 |
| 32 | 222.0.64.31/32 | 222.0.64.31 to 222.0.64.31 | — | 1 |
| 33 | 222.0.64.32/32 | 222.0.64.32 to 222.0.64.32 | — | 1 |
| 34 | 222.0.64.33/32 | 222.0.64.33 to 222.0.64.33 | — | 1 |
| 35 | 222.0.64.34/32 | 222.0.64.34 to 222.0.64.34 | — | 1 |
| 36 | 222.0.64.35/32 | 222.0.64.35 to 222.0.64.35 | — | 1 |
| 37 | 222.0.64.36/32 | 222.0.64.36 to 222.0.64.36 | — | 1 |
| 38 | 222.0.64.37/32 | 222.0.64.37 to 222.0.64.37 | — | 1 |
| 39 | 222.0.64.38/32 | 222.0.64.38 to 222.0.64.38 | — | 1 |
| 40 | 222.0.64.39/32 | 222.0.64.39 to 222.0.64.39 | — | 1 |
| 41 | 222.0.64.40/32 | 222.0.64.40 to 222.0.64.40 | — | 1 |
| 42 | 222.0.64.41/32 | 222.0.64.41 to 222.0.64.41 | — | 1 |
| 43 | 222.0.64.42/32 | 222.0.64.42 to 222.0.64.42 | — | 1 |
| 44 | 222.0.64.43/32 | 222.0.64.43 to 222.0.64.43 | — | 1 |
| 45 | 222.0.64.44/32 | 222.0.64.44 to 222.0.64.44 | — | 1 |
| 46 | 222.0.64.45/32 | 222.0.64.45 to 222.0.64.45 | — | 1 |
| 47 | 222.0.64.46/32 | 222.0.64.46 to 222.0.64.46 | — | 1 |
| 48 | 222.0.64.47/32 | 222.0.64.47 to 222.0.64.47 | — | 1 |
| 49 | 222.0.64.48/32 | 222.0.64.48 to 222.0.64.48 | — | 1 |
| 50 | 222.0.64.49/32 | 222.0.64.49 to 222.0.64.49 | — | 1 |
| 51 | 222.0.64.50/32 | 222.0.64.50 to 222.0.64.50 | — | 1 |
| 52 | 222.0.64.51/32 | 222.0.64.51 to 222.0.64.51 | — | 1 |
| 53 | 222.0.64.52/32 | 222.0.64.52 to 222.0.64.52 | — | 1 |
| 54 | 222.0.64.53/32 | 222.0.64.53 to 222.0.64.53 | — | 1 |
| 55 | 222.0.64.54/32 | 222.0.64.54 to 222.0.64.54 | — | 1 |
| 56 | 222.0.64.55/32 | 222.0.64.55 to 222.0.64.55 | — | 1 |
| 57 | 222.0.64.56/32 | 222.0.64.56 to 222.0.64.56 | — | 1 |
| 58 | 222.0.64.57/32 | 222.0.64.57 to 222.0.64.57 | — | 1 |
| 59 | 222.0.64.58/32 | 222.0.64.58 to 222.0.64.58 | — | 1 |
| 60 | 222.0.64.59/32 | 222.0.64.59 to 222.0.64.59 | — | 1 |
| 61 | 222.0.64.60/32 | 222.0.64.60 to 222.0.64.60 | — | 1 |
| 62 | 222.0.64.61/32 | 222.0.64.61 to 222.0.64.61 | — | 1 |
| 63 | 222.0.64.62/32 | 222.0.64.62 to 222.0.64.62 | — | 1 |
| 64 | 222.0.64.63/32 | 222.0.64.63 to 222.0.64.63 | — | 1 |
| 65 | 222.0.64.64/32 | 222.0.64.64 to 222.0.64.64 | — | 1 |
| 66 | 222.0.64.65/32 | 222.0.64.65 to 222.0.64.65 | — | 1 |
| 67 | 222.0.64.66/32 | 222.0.64.66 to 222.0.64.66 | — | 1 |
| 68 | 222.0.64.67/32 | 222.0.64.67 to 222.0.64.67 | — | 1 |
| 69 | 222.0.64.68/32 | 222.0.64.68 to 222.0.64.68 | — | 1 |
| 70 | 222.0.64.69/32 | 222.0.64.69 to 222.0.64.69 | — | 1 |
| 71 | 222.0.64.70/32 | 222.0.64.70 to 222.0.64.70 | — | 1 |
| 72 | 222.0.64.71/32 | 222.0.64.71 to 222.0.64.71 | — | 1 |
| 73 | 222.0.64.72/32 | 222.0.64.72 to 222.0.64.72 | — | 1 |
| 74 | 222.0.64.73/32 | 222.0.64.73 to 222.0.64.73 | — | 1 |
| 75 | 222.0.64.74/32 | 222.0.64.74 to 222.0.64.74 | — | 1 |
| 76 | 222.0.64.75/32 | 222.0.64.75 to 222.0.64.75 | — | 1 |
| 77 | 222.0.64.76/32 | 222.0.64.76 to 222.0.64.76 | — | 1 |
| 78 | 222.0.64.77/32 | 222.0.64.77 to 222.0.64.77 | — | 1 |
| 79 | 222.0.64.78/32 | 222.0.64.78 to 222.0.64.78 | — | 1 |
| 80 | 222.0.64.79/32 | 222.0.64.79 to 222.0.64.79 | — | 1 |
| 81 | 222.0.64.80/32 | 222.0.64.80 to 222.0.64.80 | — | 1 |
| 82 | 222.0.64.81/32 | 222.0.64.81 to 222.0.64.81 | — | 1 |
| 83 | 222.0.64.82/32 | 222.0.64.82 to 222.0.64.82 | — | 1 |
| 84 | 222.0.64.83/32 | 222.0.64.83 to 222.0.64.83 | — | 1 |
| 85 | 222.0.64.84/32 | 222.0.64.84 to 222.0.64.84 | — | 1 |
| 86 | 222.0.64.85/32 | 222.0.64.85 to 222.0.64.85 | — | 1 |
| 87 | 222.0.64.86/32 | 222.0.64.86 to 222.0.64.86 | — | 1 |
| 88 | 222.0.64.87/32 | 222.0.64.87 to 222.0.64.87 | — | 1 |
| 89 | 222.0.64.88/32 | 222.0.64.88 to 222.0.64.88 | — | 1 |
| 90 | 222.0.64.89/32 | 222.0.64.89 to 222.0.64.89 | — | 1 |
| 91 | 222.0.64.90/32 | 222.0.64.90 to 222.0.64.90 | — | 1 |
| 92 | 222.0.64.91/32 | 222.0.64.91 to 222.0.64.91 | — | 1 |
| 93 | 222.0.64.92/32 | 222.0.64.92 to 222.0.64.92 | — | 1 |
| 94 | 222.0.64.93/32 | 222.0.64.93 to 222.0.64.93 | — | 1 |
| 95 | 222.0.64.94/32 | 222.0.64.94 to 222.0.64.94 | — | 1 |
| 96 | 222.0.64.95/32 | 222.0.64.95 to 222.0.64.95 | — | 1 |
| 97 | 222.0.64.96/32 | 222.0.64.96 to 222.0.64.96 | — | 1 |
| 98 | 222.0.64.97/32 | 222.0.64.97 to 222.0.64.97 | — | 1 |
| 99 | 222.0.64.98/32 | 222.0.64.98 to 222.0.64.98 | — | 1 |
| 100 | 222.0.64.99/32 | 222.0.64.99 to 222.0.64.99 | — | 1 |
| 101 | 222.0.64.100/32 | 222.0.64.100 to 222.0.64.100 | — | 1 |
| 102 | 222.0.64.101/32 | 222.0.64.101 to 222.0.64.101 | — | 1 |
| 103 | 222.0.64.102/32 | 222.0.64.102 to 222.0.64.102 | — | 1 |
| 104 | 222.0.64.103/32 | 222.0.64.103 to 222.0.64.103 | — | 1 |
| 105 | 222.0.64.104/32 | 222.0.64.104 to 222.0.64.104 | — | 1 |
| 106 | 222.0.64.105/32 | 222.0.64.105 to 222.0.64.105 | — | 1 |
| 107 | 222.0.64.106/32 | 222.0.64.106 to 222.0.64.106 | — | 1 |
| 108 | 222.0.64.107/32 | 222.0.64.107 to 222.0.64.107 | — | 1 |
| 109 | 222.0.64.108/32 | 222.0.64.108 to 222.0.64.108 | — | 1 |
| 110 | 222.0.64.109/32 | 222.0.64.109 to 222.0.64.109 | — | 1 |
| 111 | 222.0.64.110/32 | 222.0.64.110 to 222.0.64.110 | — | 1 |
| 112 | 222.0.64.111/32 | 222.0.64.111 to 222.0.64.111 | — | 1 |
| 113 | 222.0.64.112/32 | 222.0.64.112 to 222.0.64.112 | — | 1 |
| 114 | 222.0.64.113/32 | 222.0.64.113 to 222.0.64.113 | — | 1 |
| 115 | 222.0.64.114/32 | 222.0.64.114 to 222.0.64.114 | — | 1 |
| 116 | 222.0.64.115/32 | 222.0.64.115 to 222.0.64.115 | — | 1 |
| 117 | 222.0.64.116/32 | 222.0.64.116 to 222.0.64.116 | — | 1 |
| 118 | 222.0.64.117/32 | 222.0.64.117 to 222.0.64.117 | — | 1 |
| 119 | 222.0.64.118/32 | 222.0.64.118 to 222.0.64.118 | — | 1 |
| 120 | 222.0.64.119/32 | 222.0.64.119 to 222.0.64.119 | — | 1 |
| 121 | 222.0.64.120/32 | 222.0.64.120 to 222.0.64.120 | — | 1 |
| 122 | 222.0.64.121/32 | 222.0.64.121 to 222.0.64.121 | — | 1 |
| 123 | 222.0.64.122/32 | 222.0.64.122 to 222.0.64.122 | — | 1 |
| 124 | 222.0.64.123/32 | 222.0.64.123 to 222.0.64.123 | — | 1 |
| 125 | 222.0.64.124/32 | 222.0.64.124 to 222.0.64.124 | — | 1 |
| 126 | 222.0.64.125/32 | 222.0.64.125 to 222.0.64.125 | — | 1 |
| 127 | 222.0.64.126/32 | 222.0.64.126 to 222.0.64.126 | — | 1 |
| 128 | 222.0.64.127/32 | 222.0.64.127 to 222.0.64.127 | — | 1 |
| 129 | 222.0.64.128/32 | 222.0.64.128 to 222.0.64.128 | — | 1 |
| 130 | 222.0.64.129/32 | 222.0.64.129 to 222.0.64.129 | — | 1 |
| 131 | 222.0.64.130/32 | 222.0.64.130 to 222.0.64.130 | — | 1 |
| 132 | 222.0.64.131/32 | 222.0.64.131 to 222.0.64.131 | — | 1 |
| 133 | 222.0.64.132/32 | 222.0.64.132 to 222.0.64.132 | — | 1 |
| 134 | 222.0.64.133/32 | 222.0.64.133 to 222.0.64.133 | — | 1 |
| 135 | 222.0.64.134/32 | 222.0.64.134 to 222.0.64.134 | — | 1 |
| 136 | 222.0.64.135/32 | 222.0.64.135 to 222.0.64.135 | — | 1 |
| 137 | 222.0.64.136/32 | 222.0.64.136 to 222.0.64.136 | — | 1 |
| 138 | 222.0.64.137/32 | 222.0.64.137 to 222.0.64.137 | — | 1 |
| 139 | 222.0.64.138/32 | 222.0.64.138 to 222.0.64.138 | — | 1 |
| 140 | 222.0.64.139/32 | 222.0.64.139 to 222.0.64.139 | — | 1 |
| 141 | 222.0.64.140/32 | 222.0.64.140 to 222.0.64.140 | — | 1 |
| 142 | 222.0.64.141/32 | 222.0.64.141 to 222.0.64.141 | — | 1 |
| 143 | 222.0.64.142/32 | 222.0.64.142 to 222.0.64.142 | — | 1 |
| 144 | 222.0.64.143/32 | 222.0.64.143 to 222.0.64.143 | — | 1 |
| 145 | 222.0.64.144/32 | 222.0.64.144 to 222.0.64.144 | — | 1 |
| 146 | 222.0.64.145/32 | 222.0.64.145 to 222.0.64.145 | — | 1 |
| 147 | 222.0.64.146/32 | 222.0.64.146 to 222.0.64.146 | — | 1 |
| 148 | 222.0.64.147/32 | 222.0.64.147 to 222.0.64.147 | — | 1 |
| 149 | 222.0.64.148/32 | 222.0.64.148 to 222.0.64.148 | — | 1 |
| 150 | 222.0.64.149/32 | 222.0.64.149 to 222.0.64.149 | — | 1 |
| 151 | 222.0.64.150/32 | 222.0.64.150 to 222.0.64.150 | — | 1 |
| 152 | 222.0.64.151/32 | 222.0.64.151 to 222.0.64.151 | — | 1 |
| 153 | 222.0.64.152/32 | 222.0.64.152 to 222.0.64.152 | — | 1 |
| 154 | 222.0.64.153/32 | 222.0.64.153 to 222.0.64.153 | — | 1 |
| 155 | 222.0.64.154/32 | 222.0.64.154 to 222.0.64.154 | — | 1 |
| 156 | 222.0.64.155/32 | 222.0.64.155 to 222.0.64.155 | — | 1 |
| 157 | 222.0.64.156/32 | 222.0.64.156 to 222.0.64.156 | — | 1 |
| 158 | 222.0.64.157/32 | 222.0.64.157 to 222.0.64.157 | — | 1 |
| 159 | 222.0.64.158/32 | 222.0.64.158 to 222.0.64.158 | — | 1 |
| 160 | 222.0.64.159/32 | 222.0.64.159 to 222.0.64.159 | — | 1 |
| 161 | 222.0.64.160/32 | 222.0.64.160 to 222.0.64.160 | — | 1 |
| 162 | 222.0.64.161/32 | 222.0.64.161 to 222.0.64.161 | — | 1 |
| 163 | 222.0.64.162/32 | 222.0.64.162 to 222.0.64.162 | — | 1 |
| 164 | 222.0.64.163/32 | 222.0.64.163 to 222.0.64.163 | — | 1 |
| 165 | 222.0.64.164/32 | 222.0.64.164 to 222.0.64.164 | — | 1 |
| 166 | 222.0.64.165/32 | 222.0.64.165 to 222.0.64.165 | — | 1 |
| 167 | 222.0.64.166/32 | 222.0.64.166 to 222.0.64.166 | — | 1 |
| 168 | 222.0.64.167/32 | 222.0.64.167 to 222.0.64.167 | — | 1 |
| 169 | 222.0.64.168/32 | 222.0.64.168 to 222.0.64.168 | — | 1 |
| 170 | 222.0.64.169/32 | 222.0.64.169 to 222.0.64.169 | — | 1 |
| 171 | 222.0.64.170/32 | 222.0.64.170 to 222.0.64.170 | — | 1 |
| 172 | 222.0.64.171/32 | 222.0.64.171 to 222.0.64.171 | — | 1 |
| 173 | 222.0.64.172/32 | 222.0.64.172 to 222.0.64.172 | — | 1 |
| 174 | 222.0.64.173/32 | 222.0.64.173 to 222.0.64.173 | — | 1 |
| 175 | 222.0.64.174/32 | 222.0.64.174 to 222.0.64.174 | — | 1 |
| 176 | 222.0.64.175/32 | 222.0.64.175 to 222.0.64.175 | — | 1 |
| 177 | 222.0.64.176/32 | 222.0.64.176 to 222.0.64.176 | — | 1 |
| 178 | 222.0.64.177/32 | 222.0.64.177 to 222.0.64.177 | — | 1 |
| 179 | 222.0.64.178/32 | 222.0.64.178 to 222.0.64.178 | — | 1 |
| 180 | 222.0.64.179/32 | 222.0.64.179 to 222.0.64.179 | — | 1 |
| 181 | 222.0.64.180/32 | 222.0.64.180 to 222.0.64.180 | — | 1 |
| 182 | 222.0.64.181/32 | 222.0.64.181 to 222.0.64.181 | — | 1 |
| 183 | 222.0.64.182/32 | 222.0.64.182 to 222.0.64.182 | — | 1 |
| 184 | 222.0.64.183/32 | 222.0.64.183 to 222.0.64.183 | — | 1 |
| 185 | 222.0.64.184/32 | 222.0.64.184 to 222.0.64.184 | — | 1 |
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| 200 | 222.0.64.199/32 | 222.0.64.199 to 222.0.64.199 | — | 1 |
| 201 | 222.0.64.200/32 | 222.0.64.200 to 222.0.64.200 | — | 1 |
| 202 | 222.0.64.201/32 | 222.0.64.201 to 222.0.64.201 | — | 1 |
| 203 | 222.0.64.202/32 | 222.0.64.202 to 222.0.64.202 | — | 1 |
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| 212 | 222.0.64.211/32 | 222.0.64.211 to 222.0.64.211 | — | 1 |
| 213 | 222.0.64.212/32 | 222.0.64.212 to 222.0.64.212 | — | 1 |
| 214 | 222.0.64.213/32 | 222.0.64.213 to 222.0.64.213 | — | 1 |
| 215 | 222.0.64.214/32 | 222.0.64.214 to 222.0.64.214 | — | 1 |
| 216 | 222.0.64.215/32 | 222.0.64.215 to 222.0.64.215 | — | 1 |
| 217 | 222.0.64.216/32 | 222.0.64.216 to 222.0.64.216 | — | 1 |
| 218 | 222.0.64.217/32 | 222.0.64.217 to 222.0.64.217 | — | 1 |
| 219 | 222.0.64.218/32 | 222.0.64.218 to 222.0.64.218 | — | 1 |
| 220 | 222.0.64.219/32 | 222.0.64.219 to 222.0.64.219 | — | 1 |
| 221 | 222.0.64.220/32 | 222.0.64.220 to 222.0.64.220 | — | 1 |
| 222 | 222.0.64.221/32 | 222.0.64.221 to 222.0.64.221 | — | 1 |
| 223 | 222.0.64.222/32 | 222.0.64.222 to 222.0.64.222 | — | 1 |
| 224 | 222.0.64.223/32 | 222.0.64.223 to 222.0.64.223 | — | 1 |
| 225 | 222.0.64.224/32 | 222.0.64.224 to 222.0.64.224 | — | 1 |
| 226 | 222.0.64.225/32 | 222.0.64.225 to 222.0.64.225 | — | 1 |
| 227 | 222.0.64.226/32 | 222.0.64.226 to 222.0.64.226 | — | 1 |
| 228 | 222.0.64.227/32 | 222.0.64.227 to 222.0.64.227 | — | 1 |
| 229 | 222.0.64.228/32 | 222.0.64.228 to 222.0.64.228 | — | 1 |
| 230 | 222.0.64.229/32 | 222.0.64.229 to 222.0.64.229 | — | 1 |
| 231 | 222.0.64.230/32 | 222.0.64.230 to 222.0.64.230 | — | 1 |
| 232 | 222.0.64.231/32 | 222.0.64.231 to 222.0.64.231 | — | 1 |
| 233 | 222.0.64.232/32 | 222.0.64.232 to 222.0.64.232 | — | 1 |
| 234 | 222.0.64.233/32 | 222.0.64.233 to 222.0.64.233 | — | 1 |
| 235 | 222.0.64.234/32 | 222.0.64.234 to 222.0.64.234 | — | 1 |
| 236 | 222.0.64.235/32 | 222.0.64.235 to 222.0.64.235 | — | 1 |
| 237 | 222.0.64.236/32 | 222.0.64.236 to 222.0.64.236 | — | 1 |
| 238 | 222.0.64.237/32 | 222.0.64.237 to 222.0.64.237 | — | 1 |
| 239 | 222.0.64.238/32 | 222.0.64.238 to 222.0.64.238 | — | 1 |
| 240 | 222.0.64.239/32 | 222.0.64.239 to 222.0.64.239 | — | 1 |
| 241 | 222.0.64.240/32 | 222.0.64.240 to 222.0.64.240 | — | 1 |
| 242 | 222.0.64.241/32 | 222.0.64.241 to 222.0.64.241 | — | 1 |
| 243 | 222.0.64.242/32 | 222.0.64.242 to 222.0.64.242 | — | 1 |
| 244 | 222.0.64.243/32 | 222.0.64.243 to 222.0.64.243 | — | 1 |
| 245 | 222.0.64.244/32 | 222.0.64.244 to 222.0.64.244 | — | 1 |
| 246 | 222.0.64.245/32 | 222.0.64.245 to 222.0.64.245 | — | 1 |
| 247 | 222.0.64.246/32 | 222.0.64.246 to 222.0.64.246 | — | 1 |
| 248 | 222.0.64.247/32 | 222.0.64.247 to 222.0.64.247 | — | 1 |
| 249 | 222.0.64.248/32 | 222.0.64.248 to 222.0.64.248 | — | 1 |
| 250 | 222.0.64.249/32 | 222.0.64.249 to 222.0.64.249 | — | 1 |
| 251 | 222.0.64.250/32 | 222.0.64.250 to 222.0.64.250 | — | 1 |
| 252 | 222.0.64.251/32 | 222.0.64.251 to 222.0.64.251 | — | 1 |
| 253 | 222.0.64.252/32 | 222.0.64.252 to 222.0.64.252 | — | 1 |
| 254 | 222.0.64.253/32 | 222.0.64.253 to 222.0.64.253 | — | 1 |
| 255 | 222.0.64.254/32 | 222.0.64.254 to 222.0.64.254 | — | 1 |
| 256 | 222.0.64.255/32 | 222.0.64.255 to 222.0.64.255 | — | 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 |