168.0.0.0/6
PublicClass B — /6 prefix — 67,108,862 usable hosts
Network address — the base address of the block (168.0.0.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 171.255.255.255 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 67,108,862 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 252.0.0.0 is the dotted-decimal equivalent of /6. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 168.0.0.0/6 |
| Network Address | 168.0.0.0 |
| Broadcast Address | 171.255.255.255 |
| Subnet Mask | 252.0.0.0 |
| Wildcard Mask | 3.255.255.255 |
| Prefix Length | /6 |
| IP Address Class | Class B |
| Total IP Addresses | 67,108,864 |
| Usable Host Addresses | 67,108,862 |
| First Usable IP | 168.0.0.1 |
| Last Usable IP | 171.255.255.254 |
| Network (Hex) | 0xA8000000 |
| Broadcast (Hex) | 0xABFFFFFF |
| Address Type | Public / Globally Routable |
Binary Representation
The first 6 bits (1s in the mask) identify the network. The remaining 26 bits identify hosts within the network.
Split into Equal Subnets
Split 168.0.0.0/6 into 2 equal /7 subnets (33,554,430 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 168.0.0.0/7 | 168.0.0.0 | 168.0.0.1 | 169.255.255.254 | 169.255.255.255 | 33,554,430 |
| 2 | 170.0.0.0/7 | 170.0.0.0 | 170.0.0.1 | 171.255.255.254 | 171.255.255.255 | 33,554,430 |
Split 168.0.0.0/6 into 4 equal /8 subnets (16,777,214 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 168.0.0.0/8 | 168.0.0.0 | 168.0.0.1 | 168.255.255.254 | 168.255.255.255 | 16,777,214 |
| 2 | 169.0.0.0/8 | 169.0.0.0 | 169.0.0.1 | 169.255.255.254 | 169.255.255.255 | 16,777,214 |
| 3 | 170.0.0.0/8 | 170.0.0.0 | 170.0.0.1 | 170.255.255.254 | 170.255.255.255 | 16,777,214 |
| 4 | 171.0.0.0/8 | 171.0.0.0 | 171.0.0.1 | 171.255.255.254 | 171.255.255.255 | 16,777,214 |
Split 168.0.0.0/6 into 8 equal /9 subnets (8,388,606 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 168.0.0.0/9 | 168.0.0.0 | 168.0.0.1 | 168.127.255.254 | 168.127.255.255 | 8,388,606 |
| 2 | 168.128.0.0/9 | 168.128.0.0 | 168.128.0.1 | 168.255.255.254 | 168.255.255.255 | 8,388,606 |
| 3 | 169.0.0.0/9 | 169.0.0.0 | 169.0.0.1 | 169.127.255.254 | 169.127.255.255 | 8,388,606 |
| 4 | 169.128.0.0/9 | 169.128.0.0 | 169.128.0.1 | 169.255.255.254 | 169.255.255.255 | 8,388,606 |
| 5 | 170.0.0.0/9 | 170.0.0.0 | 170.0.0.1 | 170.127.255.254 | 170.127.255.255 | 8,388,606 |
| 6 | 170.128.0.0/9 | 170.128.0.0 | 170.128.0.1 | 170.255.255.254 | 170.255.255.255 | 8,388,606 |
| 7 | 171.0.0.0/9 | 171.0.0.0 | 171.0.0.1 | 171.127.255.254 | 171.127.255.255 | 8,388,606 |
| 8 | 171.128.0.0/9 | 171.128.0.0 | 171.128.0.1 | 171.255.255.254 | 171.255.255.255 | 8,388,606 |
Split 168.0.0.0/6 into 16 equal /10 subnets (4,194,302 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 168.0.0.0/10 | 168.0.0.0 | 168.0.0.1 | 168.63.255.254 | 168.63.255.255 | 4,194,302 |
| 2 | 168.64.0.0/10 | 168.64.0.0 | 168.64.0.1 | 168.127.255.254 | 168.127.255.255 | 4,194,302 |
| 3 | 168.128.0.0/10 | 168.128.0.0 | 168.128.0.1 | 168.191.255.254 | 168.191.255.255 | 4,194,302 |
| 4 | 168.192.0.0/10 | 168.192.0.0 | 168.192.0.1 | 168.255.255.254 | 168.255.255.255 | 4,194,302 |
| 5 | 169.0.0.0/10 | 169.0.0.0 | 169.0.0.1 | 169.63.255.254 | 169.63.255.255 | 4,194,302 |
| 6 | 169.64.0.0/10 | 169.64.0.0 | 169.64.0.1 | 169.127.255.254 | 169.127.255.255 | 4,194,302 |
| 7 | 169.128.0.0/10 | 169.128.0.0 | 169.128.0.1 | 169.191.255.254 | 169.191.255.255 | 4,194,302 |
| 8 | 169.192.0.0/10 | 169.192.0.0 | 169.192.0.1 | 169.255.255.254 | 169.255.255.255 | 4,194,302 |
| 9 | 170.0.0.0/10 | 170.0.0.0 | 170.0.0.1 | 170.63.255.254 | 170.63.255.255 | 4,194,302 |
| 10 | 170.64.0.0/10 | 170.64.0.0 | 170.64.0.1 | 170.127.255.254 | 170.127.255.255 | 4,194,302 |
| 11 | 170.128.0.0/10 | 170.128.0.0 | 170.128.0.1 | 170.191.255.254 | 170.191.255.255 | 4,194,302 |
| 12 | 170.192.0.0/10 | 170.192.0.0 | 170.192.0.1 | 170.255.255.254 | 170.255.255.255 | 4,194,302 |
| 13 | 171.0.0.0/10 | 171.0.0.0 | 171.0.0.1 | 171.63.255.254 | 171.63.255.255 | 4,194,302 |
| 14 | 171.64.0.0/10 | 171.64.0.0 | 171.64.0.1 | 171.127.255.254 | 171.127.255.255 | 4,194,302 |
| 15 | 171.128.0.0/10 | 171.128.0.0 | 171.128.0.1 | 171.191.255.254 | 171.191.255.255 | 4,194,302 |
| 16 | 171.192.0.0/10 | 171.192.0.0 | 171.192.0.1 | 171.255.255.254 | 171.255.255.255 | 4,194,302 |