80.0.0.0/4
PublicClass A — /4 prefix — 268,435,454 usable hosts
Network address — the base address of the block (80.0.0.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 95.255.255.255 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 | 80.0.0.0/4 |
| Network Address | 80.0.0.0 |
| Broadcast Address | 95.255.255.255 |
| Subnet Mask | 240.0.0.0 |
| Wildcard Mask | 15.255.255.255 |
| Prefix Length | /4 |
| IP Address Class | Class A |
| Total IP Addresses | 268,435,456 |
| Usable Host Addresses | 268,435,454 |
| First Usable IP | 80.0.0.1 |
| Last Usable IP | 95.255.255.254 |
| Network (Hex) | 0x50000000 |
| Broadcast (Hex) | 0x5FFFFFFF |
| 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 80.0.0.0/4 into 2 equal /5 subnets (134,217,726 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 80.0.0.0/5 | 80.0.0.0 | 80.0.0.1 | 87.255.255.254 | 87.255.255.255 | 134,217,726 |
| 2 | 88.0.0.0/5 | 88.0.0.0 | 88.0.0.1 | 95.255.255.254 | 95.255.255.255 | 134,217,726 |
Split 80.0.0.0/4 into 4 equal /6 subnets (67,108,862 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 80.0.0.0/6 | 80.0.0.0 | 80.0.0.1 | 83.255.255.254 | 83.255.255.255 | 67,108,862 |
| 2 | 84.0.0.0/6 | 84.0.0.0 | 84.0.0.1 | 87.255.255.254 | 87.255.255.255 | 67,108,862 |
| 3 | 88.0.0.0/6 | 88.0.0.0 | 88.0.0.1 | 91.255.255.254 | 91.255.255.255 | 67,108,862 |
| 4 | 92.0.0.0/6 | 92.0.0.0 | 92.0.0.1 | 95.255.255.254 | 95.255.255.255 | 67,108,862 |
Split 80.0.0.0/4 into 8 equal /7 subnets (33,554,430 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 80.0.0.0/7 | 80.0.0.0 | 80.0.0.1 | 81.255.255.254 | 81.255.255.255 | 33,554,430 |
| 2 | 82.0.0.0/7 | 82.0.0.0 | 82.0.0.1 | 83.255.255.254 | 83.255.255.255 | 33,554,430 |
| 3 | 84.0.0.0/7 | 84.0.0.0 | 84.0.0.1 | 85.255.255.254 | 85.255.255.255 | 33,554,430 |
| 4 | 86.0.0.0/7 | 86.0.0.0 | 86.0.0.1 | 87.255.255.254 | 87.255.255.255 | 33,554,430 |
| 5 | 88.0.0.0/7 | 88.0.0.0 | 88.0.0.1 | 89.255.255.254 | 89.255.255.255 | 33,554,430 |
| 6 | 90.0.0.0/7 | 90.0.0.0 | 90.0.0.1 | 91.255.255.254 | 91.255.255.255 | 33,554,430 |
| 7 | 92.0.0.0/7 | 92.0.0.0 | 92.0.0.1 | 93.255.255.254 | 93.255.255.255 | 33,554,430 |
| 8 | 94.0.0.0/7 | 94.0.0.0 | 94.0.0.1 | 95.255.255.254 | 95.255.255.255 | 33,554,430 |
Split 80.0.0.0/4 into 16 equal /8 subnets (16,777,214 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 80.0.0.0/8 | 80.0.0.0 | 80.0.0.1 | 80.255.255.254 | 80.255.255.255 | 16,777,214 |
| 2 | 81.0.0.0/8 | 81.0.0.0 | 81.0.0.1 | 81.255.255.254 | 81.255.255.255 | 16,777,214 |
| 3 | 82.0.0.0/8 | 82.0.0.0 | 82.0.0.1 | 82.255.255.254 | 82.255.255.255 | 16,777,214 |
| 4 | 83.0.0.0/8 | 83.0.0.0 | 83.0.0.1 | 83.255.255.254 | 83.255.255.255 | 16,777,214 |
| 5 | 84.0.0.0/8 | 84.0.0.0 | 84.0.0.1 | 84.255.255.254 | 84.255.255.255 | 16,777,214 |
| 6 | 85.0.0.0/8 | 85.0.0.0 | 85.0.0.1 | 85.255.255.254 | 85.255.255.255 | 16,777,214 |
| 7 | 86.0.0.0/8 | 86.0.0.0 | 86.0.0.1 | 86.255.255.254 | 86.255.255.255 | 16,777,214 |
| 8 | 87.0.0.0/8 | 87.0.0.0 | 87.0.0.1 | 87.255.255.254 | 87.255.255.255 | 16,777,214 |
| 9 | 88.0.0.0/8 | 88.0.0.0 | 88.0.0.1 | 88.255.255.254 | 88.255.255.255 | 16,777,214 |
| 10 | 89.0.0.0/8 | 89.0.0.0 | 89.0.0.1 | 89.255.255.254 | 89.255.255.255 | 16,777,214 |
| 11 | 90.0.0.0/8 | 90.0.0.0 | 90.0.0.1 | 90.255.255.254 | 90.255.255.255 | 16,777,214 |
| 12 | 91.0.0.0/8 | 91.0.0.0 | 91.0.0.1 | 91.255.255.254 | 91.255.255.255 | 16,777,214 |
| 13 | 92.0.0.0/8 | 92.0.0.0 | 92.0.0.1 | 92.255.255.254 | 92.255.255.255 | 16,777,214 |
| 14 | 93.0.0.0/8 | 93.0.0.0 | 93.0.0.1 | 93.255.255.254 | 93.255.255.255 | 16,777,214 |
| 15 | 94.0.0.0/8 | 94.0.0.0 | 94.0.0.1 | 94.255.255.254 | 94.255.255.255 | 16,777,214 |
| 16 | 95.0.0.0/8 | 95.0.0.0 | 95.0.0.1 | 95.255.255.254 | 95.255.255.255 | 16,777,214 |