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.
Network52.5.0.0/20
Usable hosts4,094
Subnet mask255.255.240.0
Addresses4,096
- Network address
52.5.0.0- Broadcast address
52.5.15.255- First usable
52.5.0.1- Last usable
52.5.15.254- 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
- A (default /8)
- As numbers
- Hex
34050000· Integer872742912to872747007 - Reverse DNS zones
0.5.52.in-addr.arpa1.5.52.in-addr.arpa2.5.52.in-addr.arpa3.5.52.in-addr.arpa4.5.52.in-addr.arpa5.5.52.in-addr.arpa6.5.52.in-addr.arpa7.5.52.in-addr.arpa8.5.52.in-addr.arpa9.5.52.in-addr.arpa10.5.52.in-addr.arpa11.5.52.in-addr.arpa12.5.52.in-addr.arpa13.5.52.in-addr.arpa14.5.52.in-addr.arpa15.5.52.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 | 00110100.00000101.00000000.00000000 | 52.5.0.0 |
| Subnet mask | 11111111.11111111.11110000.00000000 | 255.255.240.0 |
| Network | 00110100.00000101.00000000.00000000 | 52.5.0.0 |
| Broadcast | 00110100.00000101.00001111.11111111 | 52.5.15.255 |
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)
52.5.0.0/20 makes 4,096 subnets of /32; the first 256 are listed.
| # | Subnet | Usable hosts range | Broadcast | Hosts |
|---|---|---|---|---|
| 1 | 52.5.0.0/32 | 52.5.0.0 to 52.5.0.0 | — | 1 |
| 2 | 52.5.0.1/32 | 52.5.0.1 to 52.5.0.1 | — | 1 |
| 3 | 52.5.0.2/32 | 52.5.0.2 to 52.5.0.2 | — | 1 |
| 4 | 52.5.0.3/32 | 52.5.0.3 to 52.5.0.3 | — | 1 |
| 5 | 52.5.0.4/32 | 52.5.0.4 to 52.5.0.4 | — | 1 |
| 6 | 52.5.0.5/32 | 52.5.0.5 to 52.5.0.5 | — | 1 |
| 7 | 52.5.0.6/32 | 52.5.0.6 to 52.5.0.6 | — | 1 |
| 8 | 52.5.0.7/32 | 52.5.0.7 to 52.5.0.7 | — | 1 |
| 9 | 52.5.0.8/32 | 52.5.0.8 to 52.5.0.8 | — | 1 |
| 10 | 52.5.0.9/32 | 52.5.0.9 to 52.5.0.9 | — | 1 |
| 11 | 52.5.0.10/32 | 52.5.0.10 to 52.5.0.10 | — | 1 |
| 12 | 52.5.0.11/32 | 52.5.0.11 to 52.5.0.11 | — | 1 |
| 13 | 52.5.0.12/32 | 52.5.0.12 to 52.5.0.12 | — | 1 |
| 14 | 52.5.0.13/32 | 52.5.0.13 to 52.5.0.13 | — | 1 |
| 15 | 52.5.0.14/32 | 52.5.0.14 to 52.5.0.14 | — | 1 |
| 16 | 52.5.0.15/32 | 52.5.0.15 to 52.5.0.15 | — | 1 |
| 17 | 52.5.0.16/32 | 52.5.0.16 to 52.5.0.16 | — | 1 |
| 18 | 52.5.0.17/32 | 52.5.0.17 to 52.5.0.17 | — | 1 |
| 19 | 52.5.0.18/32 | 52.5.0.18 to 52.5.0.18 | — | 1 |
| 20 | 52.5.0.19/32 | 52.5.0.19 to 52.5.0.19 | — | 1 |
| 21 | 52.5.0.20/32 | 52.5.0.20 to 52.5.0.20 | — | 1 |
| 22 | 52.5.0.21/32 | 52.5.0.21 to 52.5.0.21 | — | 1 |
| 23 | 52.5.0.22/32 | 52.5.0.22 to 52.5.0.22 | — | 1 |
| 24 | 52.5.0.23/32 | 52.5.0.23 to 52.5.0.23 | — | 1 |
| 25 | 52.5.0.24/32 | 52.5.0.24 to 52.5.0.24 | — | 1 |
| 26 | 52.5.0.25/32 | 52.5.0.25 to 52.5.0.25 | — | 1 |
| 27 | 52.5.0.26/32 | 52.5.0.26 to 52.5.0.26 | — | 1 |
| 28 | 52.5.0.27/32 | 52.5.0.27 to 52.5.0.27 | — | 1 |
| 29 | 52.5.0.28/32 | 52.5.0.28 to 52.5.0.28 | — | 1 |
| 30 | 52.5.0.29/32 | 52.5.0.29 to 52.5.0.29 | — | 1 |
| 31 | 52.5.0.30/32 | 52.5.0.30 to 52.5.0.30 | — | 1 |
| 32 | 52.5.0.31/32 | 52.5.0.31 to 52.5.0.31 | — | 1 |
| 33 | 52.5.0.32/32 | 52.5.0.32 to 52.5.0.32 | — | 1 |
| 34 | 52.5.0.33/32 | 52.5.0.33 to 52.5.0.33 | — | 1 |
| 35 | 52.5.0.34/32 | 52.5.0.34 to 52.5.0.34 | — | 1 |
| 36 | 52.5.0.35/32 | 52.5.0.35 to 52.5.0.35 | — | 1 |
| 37 | 52.5.0.36/32 | 52.5.0.36 to 52.5.0.36 | — | 1 |
| 38 | 52.5.0.37/32 | 52.5.0.37 to 52.5.0.37 | — | 1 |
| 39 | 52.5.0.38/32 | 52.5.0.38 to 52.5.0.38 | — | 1 |
| 40 | 52.5.0.39/32 | 52.5.0.39 to 52.5.0.39 | — | 1 |
| 41 | 52.5.0.40/32 | 52.5.0.40 to 52.5.0.40 | — | 1 |
| 42 | 52.5.0.41/32 | 52.5.0.41 to 52.5.0.41 | — | 1 |
| 43 | 52.5.0.42/32 | 52.5.0.42 to 52.5.0.42 | — | 1 |
| 44 | 52.5.0.43/32 | 52.5.0.43 to 52.5.0.43 | — | 1 |
| 45 | 52.5.0.44/32 | 52.5.0.44 to 52.5.0.44 | — | 1 |
| 46 | 52.5.0.45/32 | 52.5.0.45 to 52.5.0.45 | — | 1 |
| 47 | 52.5.0.46/32 | 52.5.0.46 to 52.5.0.46 | — | 1 |
| 48 | 52.5.0.47/32 | 52.5.0.47 to 52.5.0.47 | — | 1 |
| 49 | 52.5.0.48/32 | 52.5.0.48 to 52.5.0.48 | — | 1 |
| 50 | 52.5.0.49/32 | 52.5.0.49 to 52.5.0.49 | — | 1 |
| 51 | 52.5.0.50/32 | 52.5.0.50 to 52.5.0.50 | — | 1 |
| 52 | 52.5.0.51/32 | 52.5.0.51 to 52.5.0.51 | — | 1 |
| 53 | 52.5.0.52/32 | 52.5.0.52 to 52.5.0.52 | — | 1 |
| 54 | 52.5.0.53/32 | 52.5.0.53 to 52.5.0.53 | — | 1 |
| 55 | 52.5.0.54/32 | 52.5.0.54 to 52.5.0.54 | — | 1 |
| 56 | 52.5.0.55/32 | 52.5.0.55 to 52.5.0.55 | — | 1 |
| 57 | 52.5.0.56/32 | 52.5.0.56 to 52.5.0.56 | — | 1 |
| 58 | 52.5.0.57/32 | 52.5.0.57 to 52.5.0.57 | — | 1 |
| 59 | 52.5.0.58/32 | 52.5.0.58 to 52.5.0.58 | — | 1 |
| 60 | 52.5.0.59/32 | 52.5.0.59 to 52.5.0.59 | — | 1 |
| 61 | 52.5.0.60/32 | 52.5.0.60 to 52.5.0.60 | — | 1 |
| 62 | 52.5.0.61/32 | 52.5.0.61 to 52.5.0.61 | — | 1 |
| 63 | 52.5.0.62/32 | 52.5.0.62 to 52.5.0.62 | — | 1 |
| 64 | 52.5.0.63/32 | 52.5.0.63 to 52.5.0.63 | — | 1 |
| 65 | 52.5.0.64/32 | 52.5.0.64 to 52.5.0.64 | — | 1 |
| 66 | 52.5.0.65/32 | 52.5.0.65 to 52.5.0.65 | — | 1 |
| 67 | 52.5.0.66/32 | 52.5.0.66 to 52.5.0.66 | — | 1 |
| 68 | 52.5.0.67/32 | 52.5.0.67 to 52.5.0.67 | — | 1 |
| 69 | 52.5.0.68/32 | 52.5.0.68 to 52.5.0.68 | — | 1 |
| 70 | 52.5.0.69/32 | 52.5.0.69 to 52.5.0.69 | — | 1 |
| 71 | 52.5.0.70/32 | 52.5.0.70 to 52.5.0.70 | — | 1 |
| 72 | 52.5.0.71/32 | 52.5.0.71 to 52.5.0.71 | — | 1 |
| 73 | 52.5.0.72/32 | 52.5.0.72 to 52.5.0.72 | — | 1 |
| 74 | 52.5.0.73/32 | 52.5.0.73 to 52.5.0.73 | — | 1 |
| 75 | 52.5.0.74/32 | 52.5.0.74 to 52.5.0.74 | — | 1 |
| 76 | 52.5.0.75/32 | 52.5.0.75 to 52.5.0.75 | — | 1 |
| 77 | 52.5.0.76/32 | 52.5.0.76 to 52.5.0.76 | — | 1 |
| 78 | 52.5.0.77/32 | 52.5.0.77 to 52.5.0.77 | — | 1 |
| 79 | 52.5.0.78/32 | 52.5.0.78 to 52.5.0.78 | — | 1 |
| 80 | 52.5.0.79/32 | 52.5.0.79 to 52.5.0.79 | — | 1 |
| 81 | 52.5.0.80/32 | 52.5.0.80 to 52.5.0.80 | — | 1 |
| 82 | 52.5.0.81/32 | 52.5.0.81 to 52.5.0.81 | — | 1 |
| 83 | 52.5.0.82/32 | 52.5.0.82 to 52.5.0.82 | — | 1 |
| 84 | 52.5.0.83/32 | 52.5.0.83 to 52.5.0.83 | — | 1 |
| 85 | 52.5.0.84/32 | 52.5.0.84 to 52.5.0.84 | — | 1 |
| 86 | 52.5.0.85/32 | 52.5.0.85 to 52.5.0.85 | — | 1 |
| 87 | 52.5.0.86/32 | 52.5.0.86 to 52.5.0.86 | — | 1 |
| 88 | 52.5.0.87/32 | 52.5.0.87 to 52.5.0.87 | — | 1 |
| 89 | 52.5.0.88/32 | 52.5.0.88 to 52.5.0.88 | — | 1 |
| 90 | 52.5.0.89/32 | 52.5.0.89 to 52.5.0.89 | — | 1 |
| 91 | 52.5.0.90/32 | 52.5.0.90 to 52.5.0.90 | — | 1 |
| 92 | 52.5.0.91/32 | 52.5.0.91 to 52.5.0.91 | — | 1 |
| 93 | 52.5.0.92/32 | 52.5.0.92 to 52.5.0.92 | — | 1 |
| 94 | 52.5.0.93/32 | 52.5.0.93 to 52.5.0.93 | — | 1 |
| 95 | 52.5.0.94/32 | 52.5.0.94 to 52.5.0.94 | — | 1 |
| 96 | 52.5.0.95/32 | 52.5.0.95 to 52.5.0.95 | — | 1 |
| 97 | 52.5.0.96/32 | 52.5.0.96 to 52.5.0.96 | — | 1 |
| 98 | 52.5.0.97/32 | 52.5.0.97 to 52.5.0.97 | — | 1 |
| 99 | 52.5.0.98/32 | 52.5.0.98 to 52.5.0.98 | — | 1 |
| 100 | 52.5.0.99/32 | 52.5.0.99 to 52.5.0.99 | — | 1 |
| 101 | 52.5.0.100/32 | 52.5.0.100 to 52.5.0.100 | — | 1 |
| 102 | 52.5.0.101/32 | 52.5.0.101 to 52.5.0.101 | — | 1 |
| 103 | 52.5.0.102/32 | 52.5.0.102 to 52.5.0.102 | — | 1 |
| 104 | 52.5.0.103/32 | 52.5.0.103 to 52.5.0.103 | — | 1 |
| 105 | 52.5.0.104/32 | 52.5.0.104 to 52.5.0.104 | — | 1 |
| 106 | 52.5.0.105/32 | 52.5.0.105 to 52.5.0.105 | — | 1 |
| 107 | 52.5.0.106/32 | 52.5.0.106 to 52.5.0.106 | — | 1 |
| 108 | 52.5.0.107/32 | 52.5.0.107 to 52.5.0.107 | — | 1 |
| 109 | 52.5.0.108/32 | 52.5.0.108 to 52.5.0.108 | — | 1 |
| 110 | 52.5.0.109/32 | 52.5.0.109 to 52.5.0.109 | — | 1 |
| 111 | 52.5.0.110/32 | 52.5.0.110 to 52.5.0.110 | — | 1 |
| 112 | 52.5.0.111/32 | 52.5.0.111 to 52.5.0.111 | — | 1 |
| 113 | 52.5.0.112/32 | 52.5.0.112 to 52.5.0.112 | — | 1 |
| 114 | 52.5.0.113/32 | 52.5.0.113 to 52.5.0.113 | — | 1 |
| 115 | 52.5.0.114/32 | 52.5.0.114 to 52.5.0.114 | — | 1 |
| 116 | 52.5.0.115/32 | 52.5.0.115 to 52.5.0.115 | — | 1 |
| 117 | 52.5.0.116/32 | 52.5.0.116 to 52.5.0.116 | — | 1 |
| 118 | 52.5.0.117/32 | 52.5.0.117 to 52.5.0.117 | — | 1 |
| 119 | 52.5.0.118/32 | 52.5.0.118 to 52.5.0.118 | — | 1 |
| 120 | 52.5.0.119/32 | 52.5.0.119 to 52.5.0.119 | — | 1 |
| 121 | 52.5.0.120/32 | 52.5.0.120 to 52.5.0.120 | — | 1 |
| 122 | 52.5.0.121/32 | 52.5.0.121 to 52.5.0.121 | — | 1 |
| 123 | 52.5.0.122/32 | 52.5.0.122 to 52.5.0.122 | — | 1 |
| 124 | 52.5.0.123/32 | 52.5.0.123 to 52.5.0.123 | — | 1 |
| 125 | 52.5.0.124/32 | 52.5.0.124 to 52.5.0.124 | — | 1 |
| 126 | 52.5.0.125/32 | 52.5.0.125 to 52.5.0.125 | — | 1 |
| 127 | 52.5.0.126/32 | 52.5.0.126 to 52.5.0.126 | — | 1 |
| 128 | 52.5.0.127/32 | 52.5.0.127 to 52.5.0.127 | — | 1 |
| 129 | 52.5.0.128/32 | 52.5.0.128 to 52.5.0.128 | — | 1 |
| 130 | 52.5.0.129/32 | 52.5.0.129 to 52.5.0.129 | — | 1 |
| 131 | 52.5.0.130/32 | 52.5.0.130 to 52.5.0.130 | — | 1 |
| 132 | 52.5.0.131/32 | 52.5.0.131 to 52.5.0.131 | — | 1 |
| 133 | 52.5.0.132/32 | 52.5.0.132 to 52.5.0.132 | — | 1 |
| 134 | 52.5.0.133/32 | 52.5.0.133 to 52.5.0.133 | — | 1 |
| 135 | 52.5.0.134/32 | 52.5.0.134 to 52.5.0.134 | — | 1 |
| 136 | 52.5.0.135/32 | 52.5.0.135 to 52.5.0.135 | — | 1 |
| 137 | 52.5.0.136/32 | 52.5.0.136 to 52.5.0.136 | — | 1 |
| 138 | 52.5.0.137/32 | 52.5.0.137 to 52.5.0.137 | — | 1 |
| 139 | 52.5.0.138/32 | 52.5.0.138 to 52.5.0.138 | — | 1 |
| 140 | 52.5.0.139/32 | 52.5.0.139 to 52.5.0.139 | — | 1 |
| 141 | 52.5.0.140/32 | 52.5.0.140 to 52.5.0.140 | — | 1 |
| 142 | 52.5.0.141/32 | 52.5.0.141 to 52.5.0.141 | — | 1 |
| 143 | 52.5.0.142/32 | 52.5.0.142 to 52.5.0.142 | — | 1 |
| 144 | 52.5.0.143/32 | 52.5.0.143 to 52.5.0.143 | — | 1 |
| 145 | 52.5.0.144/32 | 52.5.0.144 to 52.5.0.144 | — | 1 |
| 146 | 52.5.0.145/32 | 52.5.0.145 to 52.5.0.145 | — | 1 |
| 147 | 52.5.0.146/32 | 52.5.0.146 to 52.5.0.146 | — | 1 |
| 148 | 52.5.0.147/32 | 52.5.0.147 to 52.5.0.147 | — | 1 |
| 149 | 52.5.0.148/32 | 52.5.0.148 to 52.5.0.148 | — | 1 |
| 150 | 52.5.0.149/32 | 52.5.0.149 to 52.5.0.149 | — | 1 |
| 151 | 52.5.0.150/32 | 52.5.0.150 to 52.5.0.150 | — | 1 |
| 152 | 52.5.0.151/32 | 52.5.0.151 to 52.5.0.151 | — | 1 |
| 153 | 52.5.0.152/32 | 52.5.0.152 to 52.5.0.152 | — | 1 |
| 154 | 52.5.0.153/32 | 52.5.0.153 to 52.5.0.153 | — | 1 |
| 155 | 52.5.0.154/32 | 52.5.0.154 to 52.5.0.154 | — | 1 |
| 156 | 52.5.0.155/32 | 52.5.0.155 to 52.5.0.155 | — | 1 |
| 157 | 52.5.0.156/32 | 52.5.0.156 to 52.5.0.156 | — | 1 |
| 158 | 52.5.0.157/32 | 52.5.0.157 to 52.5.0.157 | — | 1 |
| 159 | 52.5.0.158/32 | 52.5.0.158 to 52.5.0.158 | — | 1 |
| 160 | 52.5.0.159/32 | 52.5.0.159 to 52.5.0.159 | — | 1 |
| 161 | 52.5.0.160/32 | 52.5.0.160 to 52.5.0.160 | — | 1 |
| 162 | 52.5.0.161/32 | 52.5.0.161 to 52.5.0.161 | — | 1 |
| 163 | 52.5.0.162/32 | 52.5.0.162 to 52.5.0.162 | — | 1 |
| 164 | 52.5.0.163/32 | 52.5.0.163 to 52.5.0.163 | — | 1 |
| 165 | 52.5.0.164/32 | 52.5.0.164 to 52.5.0.164 | — | 1 |
| 166 | 52.5.0.165/32 | 52.5.0.165 to 52.5.0.165 | — | 1 |
| 167 | 52.5.0.166/32 | 52.5.0.166 to 52.5.0.166 | — | 1 |
| 168 | 52.5.0.167/32 | 52.5.0.167 to 52.5.0.167 | — | 1 |
| 169 | 52.5.0.168/32 | 52.5.0.168 to 52.5.0.168 | — | 1 |
| 170 | 52.5.0.169/32 | 52.5.0.169 to 52.5.0.169 | — | 1 |
| 171 | 52.5.0.170/32 | 52.5.0.170 to 52.5.0.170 | — | 1 |
| 172 | 52.5.0.171/32 | 52.5.0.171 to 52.5.0.171 | — | 1 |
| 173 | 52.5.0.172/32 | 52.5.0.172 to 52.5.0.172 | — | 1 |
| 174 | 52.5.0.173/32 | 52.5.0.173 to 52.5.0.173 | — | 1 |
| 175 | 52.5.0.174/32 | 52.5.0.174 to 52.5.0.174 | — | 1 |
| 176 | 52.5.0.175/32 | 52.5.0.175 to 52.5.0.175 | — | 1 |
| 177 | 52.5.0.176/32 | 52.5.0.176 to 52.5.0.176 | — | 1 |
| 178 | 52.5.0.177/32 | 52.5.0.177 to 52.5.0.177 | — | 1 |
| 179 | 52.5.0.178/32 | 52.5.0.178 to 52.5.0.178 | — | 1 |
| 180 | 52.5.0.179/32 | 52.5.0.179 to 52.5.0.179 | — | 1 |
| 181 | 52.5.0.180/32 | 52.5.0.180 to 52.5.0.180 | — | 1 |
| 182 | 52.5.0.181/32 | 52.5.0.181 to 52.5.0.181 | — | 1 |
| 183 | 52.5.0.182/32 | 52.5.0.182 to 52.5.0.182 | — | 1 |
| 184 | 52.5.0.183/32 | 52.5.0.183 to 52.5.0.183 | — | 1 |
| 185 | 52.5.0.184/32 | 52.5.0.184 to 52.5.0.184 | — | 1 |
| 186 | 52.5.0.185/32 | 52.5.0.185 to 52.5.0.185 | — | 1 |
| 187 | 52.5.0.186/32 | 52.5.0.186 to 52.5.0.186 | — | 1 |
| 188 | 52.5.0.187/32 | 52.5.0.187 to 52.5.0.187 | — | 1 |
| 189 | 52.5.0.188/32 | 52.5.0.188 to 52.5.0.188 | — | 1 |
| 190 | 52.5.0.189/32 | 52.5.0.189 to 52.5.0.189 | — | 1 |
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| 192 | 52.5.0.191/32 | 52.5.0.191 to 52.5.0.191 | — | 1 |
| 193 | 52.5.0.192/32 | 52.5.0.192 to 52.5.0.192 | — | 1 |
| 194 | 52.5.0.193/32 | 52.5.0.193 to 52.5.0.193 | — | 1 |
| 195 | 52.5.0.194/32 | 52.5.0.194 to 52.5.0.194 | — | 1 |
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| 198 | 52.5.0.197/32 | 52.5.0.197 to 52.5.0.197 | — | 1 |
| 199 | 52.5.0.198/32 | 52.5.0.198 to 52.5.0.198 | — | 1 |
| 200 | 52.5.0.199/32 | 52.5.0.199 to 52.5.0.199 | — | 1 |
| 201 | 52.5.0.200/32 | 52.5.0.200 to 52.5.0.200 | — | 1 |
| 202 | 52.5.0.201/32 | 52.5.0.201 to 52.5.0.201 | — | 1 |
| 203 | 52.5.0.202/32 | 52.5.0.202 to 52.5.0.202 | — | 1 |
| 204 | 52.5.0.203/32 | 52.5.0.203 to 52.5.0.203 | — | 1 |
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| 211 | 52.5.0.210/32 | 52.5.0.210 to 52.5.0.210 | — | 1 |
| 212 | 52.5.0.211/32 | 52.5.0.211 to 52.5.0.211 | — | 1 |
| 213 | 52.5.0.212/32 | 52.5.0.212 to 52.5.0.212 | — | 1 |
| 214 | 52.5.0.213/32 | 52.5.0.213 to 52.5.0.213 | — | 1 |
| 215 | 52.5.0.214/32 | 52.5.0.214 to 52.5.0.214 | — | 1 |
| 216 | 52.5.0.215/32 | 52.5.0.215 to 52.5.0.215 | — | 1 |
| 217 | 52.5.0.216/32 | 52.5.0.216 to 52.5.0.216 | — | 1 |
| 218 | 52.5.0.217/32 | 52.5.0.217 to 52.5.0.217 | — | 1 |
| 219 | 52.5.0.218/32 | 52.5.0.218 to 52.5.0.218 | — | 1 |
| 220 | 52.5.0.219/32 | 52.5.0.219 to 52.5.0.219 | — | 1 |
| 221 | 52.5.0.220/32 | 52.5.0.220 to 52.5.0.220 | — | 1 |
| 222 | 52.5.0.221/32 | 52.5.0.221 to 52.5.0.221 | — | 1 |
| 223 | 52.5.0.222/32 | 52.5.0.222 to 52.5.0.222 | — | 1 |
| 224 | 52.5.0.223/32 | 52.5.0.223 to 52.5.0.223 | — | 1 |
| 225 | 52.5.0.224/32 | 52.5.0.224 to 52.5.0.224 | — | 1 |
| 226 | 52.5.0.225/32 | 52.5.0.225 to 52.5.0.225 | — | 1 |
| 227 | 52.5.0.226/32 | 52.5.0.226 to 52.5.0.226 | — | 1 |
| 228 | 52.5.0.227/32 | 52.5.0.227 to 52.5.0.227 | — | 1 |
| 229 | 52.5.0.228/32 | 52.5.0.228 to 52.5.0.228 | — | 1 |
| 230 | 52.5.0.229/32 | 52.5.0.229 to 52.5.0.229 | — | 1 |
| 231 | 52.5.0.230/32 | 52.5.0.230 to 52.5.0.230 | — | 1 |
| 232 | 52.5.0.231/32 | 52.5.0.231 to 52.5.0.231 | — | 1 |
| 233 | 52.5.0.232/32 | 52.5.0.232 to 52.5.0.232 | — | 1 |
| 234 | 52.5.0.233/32 | 52.5.0.233 to 52.5.0.233 | — | 1 |
| 235 | 52.5.0.234/32 | 52.5.0.234 to 52.5.0.234 | — | 1 |
| 236 | 52.5.0.235/32 | 52.5.0.235 to 52.5.0.235 | — | 1 |
| 237 | 52.5.0.236/32 | 52.5.0.236 to 52.5.0.236 | — | 1 |
| 238 | 52.5.0.237/32 | 52.5.0.237 to 52.5.0.237 | — | 1 |
| 239 | 52.5.0.238/32 | 52.5.0.238 to 52.5.0.238 | — | 1 |
| 240 | 52.5.0.239/32 | 52.5.0.239 to 52.5.0.239 | — | 1 |
| 241 | 52.5.0.240/32 | 52.5.0.240 to 52.5.0.240 | — | 1 |
| 242 | 52.5.0.241/32 | 52.5.0.241 to 52.5.0.241 | — | 1 |
| 243 | 52.5.0.242/32 | 52.5.0.242 to 52.5.0.242 | — | 1 |
| 244 | 52.5.0.243/32 | 52.5.0.243 to 52.5.0.243 | — | 1 |
| 245 | 52.5.0.244/32 | 52.5.0.244 to 52.5.0.244 | — | 1 |
| 246 | 52.5.0.245/32 | 52.5.0.245 to 52.5.0.245 | — | 1 |
| 247 | 52.5.0.246/32 | 52.5.0.246 to 52.5.0.246 | — | 1 |
| 248 | 52.5.0.247/32 | 52.5.0.247 to 52.5.0.247 | — | 1 |
| 249 | 52.5.0.248/32 | 52.5.0.248 to 52.5.0.248 | — | 1 |
| 250 | 52.5.0.249/32 | 52.5.0.249 to 52.5.0.249 | — | 1 |
| 251 | 52.5.0.250/32 | 52.5.0.250 to 52.5.0.250 | — | 1 |
| 252 | 52.5.0.251/32 | 52.5.0.251 to 52.5.0.251 | — | 1 |
| 253 | 52.5.0.252/32 | 52.5.0.252 to 52.5.0.252 | — | 1 |
| 254 | 52.5.0.253/32 | 52.5.0.253 to 52.5.0.253 | — | 1 |
| 255 | 52.5.0.254/32 | 52.5.0.254 to 52.5.0.254 | — | 1 |
| 256 | 52.5.0.255/32 | 52.5.0.255 to 52.5.0.255 | — | 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 |