208.0.0.0/4
PublicClass C — /4 prefix — 268,435,454 usable hosts
Network address — the base address of the block (208.0.0.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 223.255.255.255 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 268,435,454 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 240.0.0.0 is the dotted-decimal equivalent of /4. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 208.0.0.0/4 |
| Network Address | 208.0.0.0 |
| Broadcast Address | 223.255.255.255 |
| Subnet Mask | 240.0.0.0 |
| Wildcard Mask | 15.255.255.255 |
| Prefix Length | /4 |
| IP Address Class | Class C |
| Total IP Addresses | 268,435,456 |
| Usable Host Addresses | 268,435,454 |
| First Usable IP | 208.0.0.1 |
| Last Usable IP | 223.255.255.254 |
| Network (Hex) | 0xD0000000 |
| Broadcast (Hex) | 0xDFFFFFFF |
| Address Type | Public / Globally Routable |
Binary Representation
The first 4 bits (1s in the mask) identify the network. The remaining 28 bits identify hosts within the network.
Split into Equal Subnets
Split 208.0.0.0/4 into 2 equal /5 subnets (134,217,726 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 208.0.0.0/5 | 208.0.0.0 | 208.0.0.1 | 215.255.255.254 | 215.255.255.255 | 134,217,726 |
| 2 | 216.0.0.0/5 | 216.0.0.0 | 216.0.0.1 | 223.255.255.254 | 223.255.255.255 | 134,217,726 |
Split 208.0.0.0/4 into 4 equal /6 subnets (67,108,862 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 208.0.0.0/6 | 208.0.0.0 | 208.0.0.1 | 211.255.255.254 | 211.255.255.255 | 67,108,862 |
| 2 | 212.0.0.0/6 | 212.0.0.0 | 212.0.0.1 | 215.255.255.254 | 215.255.255.255 | 67,108,862 |
| 3 | 216.0.0.0/6 | 216.0.0.0 | 216.0.0.1 | 219.255.255.254 | 219.255.255.255 | 67,108,862 |
| 4 | 220.0.0.0/6 | 220.0.0.0 | 220.0.0.1 | 223.255.255.254 | 223.255.255.255 | 67,108,862 |
Split 208.0.0.0/4 into 8 equal /7 subnets (33,554,430 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 208.0.0.0/7 | 208.0.0.0 | 208.0.0.1 | 209.255.255.254 | 209.255.255.255 | 33,554,430 |
| 2 | 210.0.0.0/7 | 210.0.0.0 | 210.0.0.1 | 211.255.255.254 | 211.255.255.255 | 33,554,430 |
| 3 | 212.0.0.0/7 | 212.0.0.0 | 212.0.0.1 | 213.255.255.254 | 213.255.255.255 | 33,554,430 |
| 4 | 214.0.0.0/7 | 214.0.0.0 | 214.0.0.1 | 215.255.255.254 | 215.255.255.255 | 33,554,430 |
| 5 | 216.0.0.0/7 | 216.0.0.0 | 216.0.0.1 | 217.255.255.254 | 217.255.255.255 | 33,554,430 |
| 6 | 218.0.0.0/7 | 218.0.0.0 | 218.0.0.1 | 219.255.255.254 | 219.255.255.255 | 33,554,430 |
| 7 | 220.0.0.0/7 | 220.0.0.0 | 220.0.0.1 | 221.255.255.254 | 221.255.255.255 | 33,554,430 |
| 8 | 222.0.0.0/7 | 222.0.0.0 | 222.0.0.1 | 223.255.255.254 | 223.255.255.255 | 33,554,430 |
Split 208.0.0.0/4 into 16 equal /8 subnets (16,777,214 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 208.0.0.0/8 | 208.0.0.0 | 208.0.0.1 | 208.255.255.254 | 208.255.255.255 | 16,777,214 |
| 2 | 209.0.0.0/8 | 209.0.0.0 | 209.0.0.1 | 209.255.255.254 | 209.255.255.255 | 16,777,214 |
| 3 | 210.0.0.0/8 | 210.0.0.0 | 210.0.0.1 | 210.255.255.254 | 210.255.255.255 | 16,777,214 |
| 4 | 211.0.0.0/8 | 211.0.0.0 | 211.0.0.1 | 211.255.255.254 | 211.255.255.255 | 16,777,214 |
| 5 | 212.0.0.0/8 | 212.0.0.0 | 212.0.0.1 | 212.255.255.254 | 212.255.255.255 | 16,777,214 |
| 6 | 213.0.0.0/8 | 213.0.0.0 | 213.0.0.1 | 213.255.255.254 | 213.255.255.255 | 16,777,214 |
| 7 | 214.0.0.0/8 | 214.0.0.0 | 214.0.0.1 | 214.255.255.254 | 214.255.255.255 | 16,777,214 |
| 8 | 215.0.0.0/8 | 215.0.0.0 | 215.0.0.1 | 215.255.255.254 | 215.255.255.255 | 16,777,214 |
| 9 | 216.0.0.0/8 | 216.0.0.0 | 216.0.0.1 | 216.255.255.254 | 216.255.255.255 | 16,777,214 |
| 10 | 217.0.0.0/8 | 217.0.0.0 | 217.0.0.1 | 217.255.255.254 | 217.255.255.255 | 16,777,214 |
| 11 | 218.0.0.0/8 | 218.0.0.0 | 218.0.0.1 | 218.255.255.254 | 218.255.255.255 | 16,777,214 |
| 12 | 219.0.0.0/8 | 219.0.0.0 | 219.0.0.1 | 219.255.255.254 | 219.255.255.255 | 16,777,214 |
| 13 | 220.0.0.0/8 | 220.0.0.0 | 220.0.0.1 | 220.255.255.254 | 220.255.255.255 | 16,777,214 |
| 14 | 221.0.0.0/8 | 221.0.0.0 | 221.0.0.1 | 221.255.255.254 | 221.255.255.255 | 16,777,214 |
| 15 | 222.0.0.0/8 | 222.0.0.0 | 222.0.0.1 | 222.255.255.254 | 222.255.255.255 | 16,777,214 |
| 16 | 223.0.0.0/8 | 223.0.0.0 | 223.0.0.1 | 223.255.255.254 | 223.255.255.255 | 16,777,214 |