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.
Network99.0.0.0/9
Usable hosts8,388,606
Subnet mask255.128.0.0
Addresses8,388,608
- Network address
99.0.0.0- Broadcast address
99.127.255.255- First usable
99.0.0.1- Last usable
99.127.255.254- Usable hosts
- 8,388,606 (8,388,608 less the network and broadcast addresses)
- Subnet mask
255.128.0.0- Wildcard mask
0.127.255.255(Cisco ACLs, OSPF)- Prefix length
- /9
- Type
- Public public
- Old class
- A (default /8)
- As numbers
- Hex
63000000· Integer1660944384to1669332991 - Reverse DNS zones
0.99.in-addr.arpa1.99.in-addr.arpa2.99.in-addr.arpa3.99.in-addr.arpa4.99.in-addr.arpa5.99.in-addr.arpa6.99.in-addr.arpa7.99.in-addr.arpa8.99.in-addr.arpa9.99.in-addr.arpa10.99.in-addr.arpa11.99.in-addr.arpa12.99.in-addr.arpa13.99.in-addr.arpa14.99.in-addr.arpa15.99.in-addr.arpa
and 112 more
/9 is not on a 8-bit boundary, so it takes 128 /16 zones.
Binary
| Binary (network bits bold, host bits grey) | Dotted | |
|---|---|---|
| Address | 01100011.00000000.00000000.00000000 | 99.0.0.0 |
| Subnet mask | 11111111.10000000.00000000.00000000 | 255.128.0.0 |
| Network | 01100011.00000000.00000000.00000000 | 99.0.0.0 |
| Broadcast | 01100011.01111111.11111111.11111111 | 99.127.255.255 |
Split into smaller subnets
/10 (2)/11 (4)/12 (8)/13 (16)/14 (32)/15 (64)/16 (128)/17 (256)/18 (512)/19 (1,024)/20 (2,048)/21 (4,096)
99.0.0.0/9 makes 4,096 subnets of /21; the first 256 are listed.
| # | Subnet | Usable hosts range | Broadcast | Hosts |
|---|---|---|---|---|
| 1 | 99.0.0.0/21 | 99.0.0.1 to 99.0.7.254 | 99.0.7.255 | 2,046 |
| 2 | 99.0.8.0/21 | 99.0.8.1 to 99.0.15.254 | 99.0.15.255 | 2,046 |
| 3 | 99.0.16.0/21 | 99.0.16.1 to 99.0.23.254 | 99.0.23.255 | 2,046 |
| 4 | 99.0.24.0/21 | 99.0.24.1 to 99.0.31.254 | 99.0.31.255 | 2,046 |
| 5 | 99.0.32.0/21 | 99.0.32.1 to 99.0.39.254 | 99.0.39.255 | 2,046 |
| 6 | 99.0.40.0/21 | 99.0.40.1 to 99.0.47.254 | 99.0.47.255 | 2,046 |
| 7 | 99.0.48.0/21 | 99.0.48.1 to 99.0.55.254 | 99.0.55.255 | 2,046 |
| 8 | 99.0.56.0/21 | 99.0.56.1 to 99.0.63.254 | 99.0.63.255 | 2,046 |
| 9 | 99.0.64.0/21 | 99.0.64.1 to 99.0.71.254 | 99.0.71.255 | 2,046 |
| 10 | 99.0.72.0/21 | 99.0.72.1 to 99.0.79.254 | 99.0.79.255 | 2,046 |
| 11 | 99.0.80.0/21 | 99.0.80.1 to 99.0.87.254 | 99.0.87.255 | 2,046 |
| 12 | 99.0.88.0/21 | 99.0.88.1 to 99.0.95.254 | 99.0.95.255 | 2,046 |
| 13 | 99.0.96.0/21 | 99.0.96.1 to 99.0.103.254 | 99.0.103.255 | 2,046 |
| 14 | 99.0.104.0/21 | 99.0.104.1 to 99.0.111.254 | 99.0.111.255 | 2,046 |
| 15 | 99.0.112.0/21 | 99.0.112.1 to 99.0.119.254 | 99.0.119.255 | 2,046 |
| 16 | 99.0.120.0/21 | 99.0.120.1 to 99.0.127.254 | 99.0.127.255 | 2,046 |
| 17 | 99.0.128.0/21 | 99.0.128.1 to 99.0.135.254 | 99.0.135.255 | 2,046 |
| 18 | 99.0.136.0/21 | 99.0.136.1 to 99.0.143.254 | 99.0.143.255 | 2,046 |
| 19 | 99.0.144.0/21 | 99.0.144.1 to 99.0.151.254 | 99.0.151.255 | 2,046 |
| 20 | 99.0.152.0/21 | 99.0.152.1 to 99.0.159.254 | 99.0.159.255 | 2,046 |
| 21 | 99.0.160.0/21 | 99.0.160.1 to 99.0.167.254 | 99.0.167.255 | 2,046 |
| 22 | 99.0.168.0/21 | 99.0.168.1 to 99.0.175.254 | 99.0.175.255 | 2,046 |
| 23 | 99.0.176.0/21 | 99.0.176.1 to 99.0.183.254 | 99.0.183.255 | 2,046 |
| 24 | 99.0.184.0/21 | 99.0.184.1 to 99.0.191.254 | 99.0.191.255 | 2,046 |
| 25 | 99.0.192.0/21 | 99.0.192.1 to 99.0.199.254 | 99.0.199.255 | 2,046 |
| 26 | 99.0.200.0/21 | 99.0.200.1 to 99.0.207.254 | 99.0.207.255 | 2,046 |
| 27 | 99.0.208.0/21 | 99.0.208.1 to 99.0.215.254 | 99.0.215.255 | 2,046 |
| 28 | 99.0.216.0/21 | 99.0.216.1 to 99.0.223.254 | 99.0.223.255 | 2,046 |
| 29 | 99.0.224.0/21 | 99.0.224.1 to 99.0.231.254 | 99.0.231.255 | 2,046 |
| 30 | 99.0.232.0/21 | 99.0.232.1 to 99.0.239.254 | 99.0.239.255 | 2,046 |
| 31 | 99.0.240.0/21 | 99.0.240.1 to 99.0.247.254 | 99.0.247.255 | 2,046 |
| 32 | 99.0.248.0/21 | 99.0.248.1 to 99.0.255.254 | 99.0.255.255 | 2,046 |
| 33 | 99.1.0.0/21 | 99.1.0.1 to 99.1.7.254 | 99.1.7.255 | 2,046 |
| 34 | 99.1.8.0/21 | 99.1.8.1 to 99.1.15.254 | 99.1.15.255 | 2,046 |
| 35 | 99.1.16.0/21 | 99.1.16.1 to 99.1.23.254 | 99.1.23.255 | 2,046 |
| 36 | 99.1.24.0/21 | 99.1.24.1 to 99.1.31.254 | 99.1.31.255 | 2,046 |
| 37 | 99.1.32.0/21 | 99.1.32.1 to 99.1.39.254 | 99.1.39.255 | 2,046 |
| 38 | 99.1.40.0/21 | 99.1.40.1 to 99.1.47.254 | 99.1.47.255 | 2,046 |
| 39 | 99.1.48.0/21 | 99.1.48.1 to 99.1.55.254 | 99.1.55.255 | 2,046 |
| 40 | 99.1.56.0/21 | 99.1.56.1 to 99.1.63.254 | 99.1.63.255 | 2,046 |
| 41 | 99.1.64.0/21 | 99.1.64.1 to 99.1.71.254 | 99.1.71.255 | 2,046 |
| 42 | 99.1.72.0/21 | 99.1.72.1 to 99.1.79.254 | 99.1.79.255 | 2,046 |
| 43 | 99.1.80.0/21 | 99.1.80.1 to 99.1.87.254 | 99.1.87.255 | 2,046 |
| 44 | 99.1.88.0/21 | 99.1.88.1 to 99.1.95.254 | 99.1.95.255 | 2,046 |
| 45 | 99.1.96.0/21 | 99.1.96.1 to 99.1.103.254 | 99.1.103.255 | 2,046 |
| 46 | 99.1.104.0/21 | 99.1.104.1 to 99.1.111.254 | 99.1.111.255 | 2,046 |
| 47 | 99.1.112.0/21 | 99.1.112.1 to 99.1.119.254 | 99.1.119.255 | 2,046 |
| 48 | 99.1.120.0/21 | 99.1.120.1 to 99.1.127.254 | 99.1.127.255 | 2,046 |
| 49 | 99.1.128.0/21 | 99.1.128.1 to 99.1.135.254 | 99.1.135.255 | 2,046 |
| 50 | 99.1.136.0/21 | 99.1.136.1 to 99.1.143.254 | 99.1.143.255 | 2,046 |
| 51 | 99.1.144.0/21 | 99.1.144.1 to 99.1.151.254 | 99.1.151.255 | 2,046 |
| 52 | 99.1.152.0/21 | 99.1.152.1 to 99.1.159.254 | 99.1.159.255 | 2,046 |
| 53 | 99.1.160.0/21 | 99.1.160.1 to 99.1.167.254 | 99.1.167.255 | 2,046 |
| 54 | 99.1.168.0/21 | 99.1.168.1 to 99.1.175.254 | 99.1.175.255 | 2,046 |
| 55 | 99.1.176.0/21 | 99.1.176.1 to 99.1.183.254 | 99.1.183.255 | 2,046 |
| 56 | 99.1.184.0/21 | 99.1.184.1 to 99.1.191.254 | 99.1.191.255 | 2,046 |
| 57 | 99.1.192.0/21 | 99.1.192.1 to 99.1.199.254 | 99.1.199.255 | 2,046 |
| 58 | 99.1.200.0/21 | 99.1.200.1 to 99.1.207.254 | 99.1.207.255 | 2,046 |
| 59 | 99.1.208.0/21 | 99.1.208.1 to 99.1.215.254 | 99.1.215.255 | 2,046 |
| 60 | 99.1.216.0/21 | 99.1.216.1 to 99.1.223.254 | 99.1.223.255 | 2,046 |
| 61 | 99.1.224.0/21 | 99.1.224.1 to 99.1.231.254 | 99.1.231.255 | 2,046 |
| 62 | 99.1.232.0/21 | 99.1.232.1 to 99.1.239.254 | 99.1.239.255 | 2,046 |
| 63 | 99.1.240.0/21 | 99.1.240.1 to 99.1.247.254 | 99.1.247.255 | 2,046 |
| 64 | 99.1.248.0/21 | 99.1.248.1 to 99.1.255.254 | 99.1.255.255 | 2,046 |
| 65 | 99.2.0.0/21 | 99.2.0.1 to 99.2.7.254 | 99.2.7.255 | 2,046 |
| 66 | 99.2.8.0/21 | 99.2.8.1 to 99.2.15.254 | 99.2.15.255 | 2,046 |
| 67 | 99.2.16.0/21 | 99.2.16.1 to 99.2.23.254 | 99.2.23.255 | 2,046 |
| 68 | 99.2.24.0/21 | 99.2.24.1 to 99.2.31.254 | 99.2.31.255 | 2,046 |
| 69 | 99.2.32.0/21 | 99.2.32.1 to 99.2.39.254 | 99.2.39.255 | 2,046 |
| 70 | 99.2.40.0/21 | 99.2.40.1 to 99.2.47.254 | 99.2.47.255 | 2,046 |
| 71 | 99.2.48.0/21 | 99.2.48.1 to 99.2.55.254 | 99.2.55.255 | 2,046 |
| 72 | 99.2.56.0/21 | 99.2.56.1 to 99.2.63.254 | 99.2.63.255 | 2,046 |
| 73 | 99.2.64.0/21 | 99.2.64.1 to 99.2.71.254 | 99.2.71.255 | 2,046 |
| 74 | 99.2.72.0/21 | 99.2.72.1 to 99.2.79.254 | 99.2.79.255 | 2,046 |
| 75 | 99.2.80.0/21 | 99.2.80.1 to 99.2.87.254 | 99.2.87.255 | 2,046 |
| 76 | 99.2.88.0/21 | 99.2.88.1 to 99.2.95.254 | 99.2.95.255 | 2,046 |
| 77 | 99.2.96.0/21 | 99.2.96.1 to 99.2.103.254 | 99.2.103.255 | 2,046 |
| 78 | 99.2.104.0/21 | 99.2.104.1 to 99.2.111.254 | 99.2.111.255 | 2,046 |
| 79 | 99.2.112.0/21 | 99.2.112.1 to 99.2.119.254 | 99.2.119.255 | 2,046 |
| 80 | 99.2.120.0/21 | 99.2.120.1 to 99.2.127.254 | 99.2.127.255 | 2,046 |
| 81 | 99.2.128.0/21 | 99.2.128.1 to 99.2.135.254 | 99.2.135.255 | 2,046 |
| 82 | 99.2.136.0/21 | 99.2.136.1 to 99.2.143.254 | 99.2.143.255 | 2,046 |
| 83 | 99.2.144.0/21 | 99.2.144.1 to 99.2.151.254 | 99.2.151.255 | 2,046 |
| 84 | 99.2.152.0/21 | 99.2.152.1 to 99.2.159.254 | 99.2.159.255 | 2,046 |
| 85 | 99.2.160.0/21 | 99.2.160.1 to 99.2.167.254 | 99.2.167.255 | 2,046 |
| 86 | 99.2.168.0/21 | 99.2.168.1 to 99.2.175.254 | 99.2.175.255 | 2,046 |
| 87 | 99.2.176.0/21 | 99.2.176.1 to 99.2.183.254 | 99.2.183.255 | 2,046 |
| 88 | 99.2.184.0/21 | 99.2.184.1 to 99.2.191.254 | 99.2.191.255 | 2,046 |
| 89 | 99.2.192.0/21 | 99.2.192.1 to 99.2.199.254 | 99.2.199.255 | 2,046 |
| 90 | 99.2.200.0/21 | 99.2.200.1 to 99.2.207.254 | 99.2.207.255 | 2,046 |
| 91 | 99.2.208.0/21 | 99.2.208.1 to 99.2.215.254 | 99.2.215.255 | 2,046 |
| 92 | 99.2.216.0/21 | 99.2.216.1 to 99.2.223.254 | 99.2.223.255 | 2,046 |
| 93 | 99.2.224.0/21 | 99.2.224.1 to 99.2.231.254 | 99.2.231.255 | 2,046 |
| 94 | 99.2.232.0/21 | 99.2.232.1 to 99.2.239.254 | 99.2.239.255 | 2,046 |
| 95 | 99.2.240.0/21 | 99.2.240.1 to 99.2.247.254 | 99.2.247.255 | 2,046 |
| 96 | 99.2.248.0/21 | 99.2.248.1 to 99.2.255.254 | 99.2.255.255 | 2,046 |
| 97 | 99.3.0.0/21 | 99.3.0.1 to 99.3.7.254 | 99.3.7.255 | 2,046 |
| 98 | 99.3.8.0/21 | 99.3.8.1 to 99.3.15.254 | 99.3.15.255 | 2,046 |
| 99 | 99.3.16.0/21 | 99.3.16.1 to 99.3.23.254 | 99.3.23.255 | 2,046 |
| 100 | 99.3.24.0/21 | 99.3.24.1 to 99.3.31.254 | 99.3.31.255 | 2,046 |
| 101 | 99.3.32.0/21 | 99.3.32.1 to 99.3.39.254 | 99.3.39.255 | 2,046 |
| 102 | 99.3.40.0/21 | 99.3.40.1 to 99.3.47.254 | 99.3.47.255 | 2,046 |
| 103 | 99.3.48.0/21 | 99.3.48.1 to 99.3.55.254 | 99.3.55.255 | 2,046 |
| 104 | 99.3.56.0/21 | 99.3.56.1 to 99.3.63.254 | 99.3.63.255 | 2,046 |
| 105 | 99.3.64.0/21 | 99.3.64.1 to 99.3.71.254 | 99.3.71.255 | 2,046 |
| 106 | 99.3.72.0/21 | 99.3.72.1 to 99.3.79.254 | 99.3.79.255 | 2,046 |
| 107 | 99.3.80.0/21 | 99.3.80.1 to 99.3.87.254 | 99.3.87.255 | 2,046 |
| 108 | 99.3.88.0/21 | 99.3.88.1 to 99.3.95.254 | 99.3.95.255 | 2,046 |
| 109 | 99.3.96.0/21 | 99.3.96.1 to 99.3.103.254 | 99.3.103.255 | 2,046 |
| 110 | 99.3.104.0/21 | 99.3.104.1 to 99.3.111.254 | 99.3.111.255 | 2,046 |
| 111 | 99.3.112.0/21 | 99.3.112.1 to 99.3.119.254 | 99.3.119.255 | 2,046 |
| 112 | 99.3.120.0/21 | 99.3.120.1 to 99.3.127.254 | 99.3.127.255 | 2,046 |
| 113 | 99.3.128.0/21 | 99.3.128.1 to 99.3.135.254 | 99.3.135.255 | 2,046 |
| 114 | 99.3.136.0/21 | 99.3.136.1 to 99.3.143.254 | 99.3.143.255 | 2,046 |
| 115 | 99.3.144.0/21 | 99.3.144.1 to 99.3.151.254 | 99.3.151.255 | 2,046 |
| 116 | 99.3.152.0/21 | 99.3.152.1 to 99.3.159.254 | 99.3.159.255 | 2,046 |
| 117 | 99.3.160.0/21 | 99.3.160.1 to 99.3.167.254 | 99.3.167.255 | 2,046 |
| 118 | 99.3.168.0/21 | 99.3.168.1 to 99.3.175.254 | 99.3.175.255 | 2,046 |
| 119 | 99.3.176.0/21 | 99.3.176.1 to 99.3.183.254 | 99.3.183.255 | 2,046 |
| 120 | 99.3.184.0/21 | 99.3.184.1 to 99.3.191.254 | 99.3.191.255 | 2,046 |
| 121 | 99.3.192.0/21 | 99.3.192.1 to 99.3.199.254 | 99.3.199.255 | 2,046 |
| 122 | 99.3.200.0/21 | 99.3.200.1 to 99.3.207.254 | 99.3.207.255 | 2,046 |
| 123 | 99.3.208.0/21 | 99.3.208.1 to 99.3.215.254 | 99.3.215.255 | 2,046 |
| 124 | 99.3.216.0/21 | 99.3.216.1 to 99.3.223.254 | 99.3.223.255 | 2,046 |
| 125 | 99.3.224.0/21 | 99.3.224.1 to 99.3.231.254 | 99.3.231.255 | 2,046 |
| 126 | 99.3.232.0/21 | 99.3.232.1 to 99.3.239.254 | 99.3.239.255 | 2,046 |
| 127 | 99.3.240.0/21 | 99.3.240.1 to 99.3.247.254 | 99.3.247.255 | 2,046 |
| 128 | 99.3.248.0/21 | 99.3.248.1 to 99.3.255.254 | 99.3.255.255 | 2,046 |
| 129 | 99.4.0.0/21 | 99.4.0.1 to 99.4.7.254 | 99.4.7.255 | 2,046 |
| 130 | 99.4.8.0/21 | 99.4.8.1 to 99.4.15.254 | 99.4.15.255 | 2,046 |
| 131 | 99.4.16.0/21 | 99.4.16.1 to 99.4.23.254 | 99.4.23.255 | 2,046 |
| 132 | 99.4.24.0/21 | 99.4.24.1 to 99.4.31.254 | 99.4.31.255 | 2,046 |
| 133 | 99.4.32.0/21 | 99.4.32.1 to 99.4.39.254 | 99.4.39.255 | 2,046 |
| 134 | 99.4.40.0/21 | 99.4.40.1 to 99.4.47.254 | 99.4.47.255 | 2,046 |
| 135 | 99.4.48.0/21 | 99.4.48.1 to 99.4.55.254 | 99.4.55.255 | 2,046 |
| 136 | 99.4.56.0/21 | 99.4.56.1 to 99.4.63.254 | 99.4.63.255 | 2,046 |
| 137 | 99.4.64.0/21 | 99.4.64.1 to 99.4.71.254 | 99.4.71.255 | 2,046 |
| 138 | 99.4.72.0/21 | 99.4.72.1 to 99.4.79.254 | 99.4.79.255 | 2,046 |
| 139 | 99.4.80.0/21 | 99.4.80.1 to 99.4.87.254 | 99.4.87.255 | 2,046 |
| 140 | 99.4.88.0/21 | 99.4.88.1 to 99.4.95.254 | 99.4.95.255 | 2,046 |
| 141 | 99.4.96.0/21 | 99.4.96.1 to 99.4.103.254 | 99.4.103.255 | 2,046 |
| 142 | 99.4.104.0/21 | 99.4.104.1 to 99.4.111.254 | 99.4.111.255 | 2,046 |
| 143 | 99.4.112.0/21 | 99.4.112.1 to 99.4.119.254 | 99.4.119.255 | 2,046 |
| 144 | 99.4.120.0/21 | 99.4.120.1 to 99.4.127.254 | 99.4.127.255 | 2,046 |
| 145 | 99.4.128.0/21 | 99.4.128.1 to 99.4.135.254 | 99.4.135.255 | 2,046 |
| 146 | 99.4.136.0/21 | 99.4.136.1 to 99.4.143.254 | 99.4.143.255 | 2,046 |
| 147 | 99.4.144.0/21 | 99.4.144.1 to 99.4.151.254 | 99.4.151.255 | 2,046 |
| 148 | 99.4.152.0/21 | 99.4.152.1 to 99.4.159.254 | 99.4.159.255 | 2,046 |
| 149 | 99.4.160.0/21 | 99.4.160.1 to 99.4.167.254 | 99.4.167.255 | 2,046 |
| 150 | 99.4.168.0/21 | 99.4.168.1 to 99.4.175.254 | 99.4.175.255 | 2,046 |
| 151 | 99.4.176.0/21 | 99.4.176.1 to 99.4.183.254 | 99.4.183.255 | 2,046 |
| 152 | 99.4.184.0/21 | 99.4.184.1 to 99.4.191.254 | 99.4.191.255 | 2,046 |
| 153 | 99.4.192.0/21 | 99.4.192.1 to 99.4.199.254 | 99.4.199.255 | 2,046 |
| 154 | 99.4.200.0/21 | 99.4.200.1 to 99.4.207.254 | 99.4.207.255 | 2,046 |
| 155 | 99.4.208.0/21 | 99.4.208.1 to 99.4.215.254 | 99.4.215.255 | 2,046 |
| 156 | 99.4.216.0/21 | 99.4.216.1 to 99.4.223.254 | 99.4.223.255 | 2,046 |
| 157 | 99.4.224.0/21 | 99.4.224.1 to 99.4.231.254 | 99.4.231.255 | 2,046 |
| 158 | 99.4.232.0/21 | 99.4.232.1 to 99.4.239.254 | 99.4.239.255 | 2,046 |
| 159 | 99.4.240.0/21 | 99.4.240.1 to 99.4.247.254 | 99.4.247.255 | 2,046 |
| 160 | 99.4.248.0/21 | 99.4.248.1 to 99.4.255.254 | 99.4.255.255 | 2,046 |
| 161 | 99.5.0.0/21 | 99.5.0.1 to 99.5.7.254 | 99.5.7.255 | 2,046 |
| 162 | 99.5.8.0/21 | 99.5.8.1 to 99.5.15.254 | 99.5.15.255 | 2,046 |
| 163 | 99.5.16.0/21 | 99.5.16.1 to 99.5.23.254 | 99.5.23.255 | 2,046 |
| 164 | 99.5.24.0/21 | 99.5.24.1 to 99.5.31.254 | 99.5.31.255 | 2,046 |
| 165 | 99.5.32.0/21 | 99.5.32.1 to 99.5.39.254 | 99.5.39.255 | 2,046 |
| 166 | 99.5.40.0/21 | 99.5.40.1 to 99.5.47.254 | 99.5.47.255 | 2,046 |
| 167 | 99.5.48.0/21 | 99.5.48.1 to 99.5.55.254 | 99.5.55.255 | 2,046 |
| 168 | 99.5.56.0/21 | 99.5.56.1 to 99.5.63.254 | 99.5.63.255 | 2,046 |
| 169 | 99.5.64.0/21 | 99.5.64.1 to 99.5.71.254 | 99.5.71.255 | 2,046 |
| 170 | 99.5.72.0/21 | 99.5.72.1 to 99.5.79.254 | 99.5.79.255 | 2,046 |
| 171 | 99.5.80.0/21 | 99.5.80.1 to 99.5.87.254 | 99.5.87.255 | 2,046 |
| 172 | 99.5.88.0/21 | 99.5.88.1 to 99.5.95.254 | 99.5.95.255 | 2,046 |
| 173 | 99.5.96.0/21 | 99.5.96.1 to 99.5.103.254 | 99.5.103.255 | 2,046 |
| 174 | 99.5.104.0/21 | 99.5.104.1 to 99.5.111.254 | 99.5.111.255 | 2,046 |
| 175 | 99.5.112.0/21 | 99.5.112.1 to 99.5.119.254 | 99.5.119.255 | 2,046 |
| 176 | 99.5.120.0/21 | 99.5.120.1 to 99.5.127.254 | 99.5.127.255 | 2,046 |
| 177 | 99.5.128.0/21 | 99.5.128.1 to 99.5.135.254 | 99.5.135.255 | 2,046 |
| 178 | 99.5.136.0/21 | 99.5.136.1 to 99.5.143.254 | 99.5.143.255 | 2,046 |
| 179 | 99.5.144.0/21 | 99.5.144.1 to 99.5.151.254 | 99.5.151.255 | 2,046 |
| 180 | 99.5.152.0/21 | 99.5.152.1 to 99.5.159.254 | 99.5.159.255 | 2,046 |
| 181 | 99.5.160.0/21 | 99.5.160.1 to 99.5.167.254 | 99.5.167.255 | 2,046 |
| 182 | 99.5.168.0/21 | 99.5.168.1 to 99.5.175.254 | 99.5.175.255 | 2,046 |
| 183 | 99.5.176.0/21 | 99.5.176.1 to 99.5.183.254 | 99.5.183.255 | 2,046 |
| 184 | 99.5.184.0/21 | 99.5.184.1 to 99.5.191.254 | 99.5.191.255 | 2,046 |
| 185 | 99.5.192.0/21 | 99.5.192.1 to 99.5.199.254 | 99.5.199.255 | 2,046 |
| 186 | 99.5.200.0/21 | 99.5.200.1 to 99.5.207.254 | 99.5.207.255 | 2,046 |
| 187 | 99.5.208.0/21 | 99.5.208.1 to 99.5.215.254 | 99.5.215.255 | 2,046 |
| 188 | 99.5.216.0/21 | 99.5.216.1 to 99.5.223.254 | 99.5.223.255 | 2,046 |
| 189 | 99.5.224.0/21 | 99.5.224.1 to 99.5.231.254 | 99.5.231.255 | 2,046 |
| 190 | 99.5.232.0/21 | 99.5.232.1 to 99.5.239.254 | 99.5.239.255 | 2,046 |
| 191 | 99.5.240.0/21 | 99.5.240.1 to 99.5.247.254 | 99.5.247.255 | 2,046 |
| 192 | 99.5.248.0/21 | 99.5.248.1 to 99.5.255.254 | 99.5.255.255 | 2,046 |
| 193 | 99.6.0.0/21 | 99.6.0.1 to 99.6.7.254 | 99.6.7.255 | 2,046 |
| 194 | 99.6.8.0/21 | 99.6.8.1 to 99.6.15.254 | 99.6.15.255 | 2,046 |
| 195 | 99.6.16.0/21 | 99.6.16.1 to 99.6.23.254 | 99.6.23.255 | 2,046 |
| 196 | 99.6.24.0/21 | 99.6.24.1 to 99.6.31.254 | 99.6.31.255 | 2,046 |
| 197 | 99.6.32.0/21 | 99.6.32.1 to 99.6.39.254 | 99.6.39.255 | 2,046 |
| 198 | 99.6.40.0/21 | 99.6.40.1 to 99.6.47.254 | 99.6.47.255 | 2,046 |
| 199 | 99.6.48.0/21 | 99.6.48.1 to 99.6.55.254 | 99.6.55.255 | 2,046 |
| 200 | 99.6.56.0/21 | 99.6.56.1 to 99.6.63.254 | 99.6.63.255 | 2,046 |
| 201 | 99.6.64.0/21 | 99.6.64.1 to 99.6.71.254 | 99.6.71.255 | 2,046 |
| 202 | 99.6.72.0/21 | 99.6.72.1 to 99.6.79.254 | 99.6.79.255 | 2,046 |
| 203 | 99.6.80.0/21 | 99.6.80.1 to 99.6.87.254 | 99.6.87.255 | 2,046 |
| 204 | 99.6.88.0/21 | 99.6.88.1 to 99.6.95.254 | 99.6.95.255 | 2,046 |
| 205 | 99.6.96.0/21 | 99.6.96.1 to 99.6.103.254 | 99.6.103.255 | 2,046 |
| 206 | 99.6.104.0/21 | 99.6.104.1 to 99.6.111.254 | 99.6.111.255 | 2,046 |
| 207 | 99.6.112.0/21 | 99.6.112.1 to 99.6.119.254 | 99.6.119.255 | 2,046 |
| 208 | 99.6.120.0/21 | 99.6.120.1 to 99.6.127.254 | 99.6.127.255 | 2,046 |
| 209 | 99.6.128.0/21 | 99.6.128.1 to 99.6.135.254 | 99.6.135.255 | 2,046 |
| 210 | 99.6.136.0/21 | 99.6.136.1 to 99.6.143.254 | 99.6.143.255 | 2,046 |
| 211 | 99.6.144.0/21 | 99.6.144.1 to 99.6.151.254 | 99.6.151.255 | 2,046 |
| 212 | 99.6.152.0/21 | 99.6.152.1 to 99.6.159.254 | 99.6.159.255 | 2,046 |
| 213 | 99.6.160.0/21 | 99.6.160.1 to 99.6.167.254 | 99.6.167.255 | 2,046 |
| 214 | 99.6.168.0/21 | 99.6.168.1 to 99.6.175.254 | 99.6.175.255 | 2,046 |
| 215 | 99.6.176.0/21 | 99.6.176.1 to 99.6.183.254 | 99.6.183.255 | 2,046 |
| 216 | 99.6.184.0/21 | 99.6.184.1 to 99.6.191.254 | 99.6.191.255 | 2,046 |
| 217 | 99.6.192.0/21 | 99.6.192.1 to 99.6.199.254 | 99.6.199.255 | 2,046 |
| 218 | 99.6.200.0/21 | 99.6.200.1 to 99.6.207.254 | 99.6.207.255 | 2,046 |
| 219 | 99.6.208.0/21 | 99.6.208.1 to 99.6.215.254 | 99.6.215.255 | 2,046 |
| 220 | 99.6.216.0/21 | 99.6.216.1 to 99.6.223.254 | 99.6.223.255 | 2,046 |
| 221 | 99.6.224.0/21 | 99.6.224.1 to 99.6.231.254 | 99.6.231.255 | 2,046 |
| 222 | 99.6.232.0/21 | 99.6.232.1 to 99.6.239.254 | 99.6.239.255 | 2,046 |
| 223 | 99.6.240.0/21 | 99.6.240.1 to 99.6.247.254 | 99.6.247.255 | 2,046 |
| 224 | 99.6.248.0/21 | 99.6.248.1 to 99.6.255.254 | 99.6.255.255 | 2,046 |
| 225 | 99.7.0.0/21 | 99.7.0.1 to 99.7.7.254 | 99.7.7.255 | 2,046 |
| 226 | 99.7.8.0/21 | 99.7.8.1 to 99.7.15.254 | 99.7.15.255 | 2,046 |
| 227 | 99.7.16.0/21 | 99.7.16.1 to 99.7.23.254 | 99.7.23.255 | 2,046 |
| 228 | 99.7.24.0/21 | 99.7.24.1 to 99.7.31.254 | 99.7.31.255 | 2,046 |
| 229 | 99.7.32.0/21 | 99.7.32.1 to 99.7.39.254 | 99.7.39.255 | 2,046 |
| 230 | 99.7.40.0/21 | 99.7.40.1 to 99.7.47.254 | 99.7.47.255 | 2,046 |
| 231 | 99.7.48.0/21 | 99.7.48.1 to 99.7.55.254 | 99.7.55.255 | 2,046 |
| 232 | 99.7.56.0/21 | 99.7.56.1 to 99.7.63.254 | 99.7.63.255 | 2,046 |
| 233 | 99.7.64.0/21 | 99.7.64.1 to 99.7.71.254 | 99.7.71.255 | 2,046 |
| 234 | 99.7.72.0/21 | 99.7.72.1 to 99.7.79.254 | 99.7.79.255 | 2,046 |
| 235 | 99.7.80.0/21 | 99.7.80.1 to 99.7.87.254 | 99.7.87.255 | 2,046 |
| 236 | 99.7.88.0/21 | 99.7.88.1 to 99.7.95.254 | 99.7.95.255 | 2,046 |
| 237 | 99.7.96.0/21 | 99.7.96.1 to 99.7.103.254 | 99.7.103.255 | 2,046 |
| 238 | 99.7.104.0/21 | 99.7.104.1 to 99.7.111.254 | 99.7.111.255 | 2,046 |
| 239 | 99.7.112.0/21 | 99.7.112.1 to 99.7.119.254 | 99.7.119.255 | 2,046 |
| 240 | 99.7.120.0/21 | 99.7.120.1 to 99.7.127.254 | 99.7.127.255 | 2,046 |
| 241 | 99.7.128.0/21 | 99.7.128.1 to 99.7.135.254 | 99.7.135.255 | 2,046 |
| 242 | 99.7.136.0/21 | 99.7.136.1 to 99.7.143.254 | 99.7.143.255 | 2,046 |
| 243 | 99.7.144.0/21 | 99.7.144.1 to 99.7.151.254 | 99.7.151.255 | 2,046 |
| 244 | 99.7.152.0/21 | 99.7.152.1 to 99.7.159.254 | 99.7.159.255 | 2,046 |
| 245 | 99.7.160.0/21 | 99.7.160.1 to 99.7.167.254 | 99.7.167.255 | 2,046 |
| 246 | 99.7.168.0/21 | 99.7.168.1 to 99.7.175.254 | 99.7.175.255 | 2,046 |
| 247 | 99.7.176.0/21 | 99.7.176.1 to 99.7.183.254 | 99.7.183.255 | 2,046 |
| 248 | 99.7.184.0/21 | 99.7.184.1 to 99.7.191.254 | 99.7.191.255 | 2,046 |
| 249 | 99.7.192.0/21 | 99.7.192.1 to 99.7.199.254 | 99.7.199.255 | 2,046 |
| 250 | 99.7.200.0/21 | 99.7.200.1 to 99.7.207.254 | 99.7.207.255 | 2,046 |
| 251 | 99.7.208.0/21 | 99.7.208.1 to 99.7.215.254 | 99.7.215.255 | 2,046 |
| 252 | 99.7.216.0/21 | 99.7.216.1 to 99.7.223.254 | 99.7.223.255 | 2,046 |
| 253 | 99.7.224.0/21 | 99.7.224.1 to 99.7.231.254 | 99.7.231.255 | 2,046 |
| 254 | 99.7.232.0/21 | 99.7.232.1 to 99.7.239.254 | 99.7.239.255 | 2,046 |
| 255 | 99.7.240.0/21 | 99.7.240.1 to 99.7.247.254 | 99.7.247.255 | 2,046 |
| 256 | 99.7.248.0/21 | 99.7.248.1 to 99.7.255.254 | 99.7.255.255 | 2,046 |
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 |