0.0.0.0/3
PublicClass A — /3 prefix — 536,870,910 usable hosts
Network address — the base address of the block (0.0.0.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 31.255.255.255 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 536,870,910 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 224.0.0.0 is the dotted-decimal equivalent of /3. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 0.0.0.0/3 |
| Network Address | 0.0.0.0 |
| Broadcast Address | 31.255.255.255 |
| Subnet Mask | 224.0.0.0 |
| Wildcard Mask | 31.255.255.255 |
| Prefix Length | /3 |
| IP Address Class | Class A |
| Total IP Addresses | 536,870,912 |
| Usable Host Addresses | 536,870,910 |
| First Usable IP | 0.0.0.1 |
| Last Usable IP | 31.255.255.254 |
| Network (Hex) | 0x00000000 |
| Broadcast (Hex) | 0x1FFFFFFF |
| Address Type | Public / Globally Routable |
Binary Representation
The first 3 bits (1s in the mask) identify the network. The remaining 29 bits identify hosts within the network.
Split into Equal Subnets
Split 0.0.0.0/3 into 2 equal /4 subnets (268,435,454 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 0.0.0.0/4 | 0.0.0.0 | 0.0.0.1 | 15.255.255.254 | 15.255.255.255 | 268,435,454 |
| 2 | 16.0.0.0/4 | 16.0.0.0 | 16.0.0.1 | 31.255.255.254 | 31.255.255.255 | 268,435,454 |
Split 0.0.0.0/3 into 4 equal /5 subnets (134,217,726 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 0.0.0.0/5 | 0.0.0.0 | 0.0.0.1 | 7.255.255.254 | 7.255.255.255 | 134,217,726 |
| 2 | 8.0.0.0/5 | 8.0.0.0 | 8.0.0.1 | 15.255.255.254 | 15.255.255.255 | 134,217,726 |
| 3 | 16.0.0.0/5 | 16.0.0.0 | 16.0.0.1 | 23.255.255.254 | 23.255.255.255 | 134,217,726 |
| 4 | 24.0.0.0/5 | 24.0.0.0 | 24.0.0.1 | 31.255.255.254 | 31.255.255.255 | 134,217,726 |
Split 0.0.0.0/3 into 8 equal /6 subnets (67,108,862 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 0.0.0.0/6 | 0.0.0.0 | 0.0.0.1 | 3.255.255.254 | 3.255.255.255 | 67,108,862 |
| 2 | 4.0.0.0/6 | 4.0.0.0 | 4.0.0.1 | 7.255.255.254 | 7.255.255.255 | 67,108,862 |
| 3 | 8.0.0.0/6 | 8.0.0.0 | 8.0.0.1 | 11.255.255.254 | 11.255.255.255 | 67,108,862 |
| 4 | 12.0.0.0/6 | 12.0.0.0 | 12.0.0.1 | 15.255.255.254 | 15.255.255.255 | 67,108,862 |
| 5 | 16.0.0.0/6 | 16.0.0.0 | 16.0.0.1 | 19.255.255.254 | 19.255.255.255 | 67,108,862 |
| 6 | 20.0.0.0/6 | 20.0.0.0 | 20.0.0.1 | 23.255.255.254 | 23.255.255.255 | 67,108,862 |
| 7 | 24.0.0.0/6 | 24.0.0.0 | 24.0.0.1 | 27.255.255.254 | 27.255.255.255 | 67,108,862 |
| 8 | 28.0.0.0/6 | 28.0.0.0 | 28.0.0.1 | 31.255.255.254 | 31.255.255.255 | 67,108,862 |
Split 0.0.0.0/3 into 16 equal /7 subnets (33,554,430 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 0.0.0.0/7 | 0.0.0.0 | 0.0.0.1 | 1.255.255.254 | 1.255.255.255 | 33,554,430 |
| 2 | 2.0.0.0/7 | 2.0.0.0 | 2.0.0.1 | 3.255.255.254 | 3.255.255.255 | 33,554,430 |
| 3 | 4.0.0.0/7 | 4.0.0.0 | 4.0.0.1 | 5.255.255.254 | 5.255.255.255 | 33,554,430 |
| 4 | 6.0.0.0/7 | 6.0.0.0 | 6.0.0.1 | 7.255.255.254 | 7.255.255.255 | 33,554,430 |
| 5 | 8.0.0.0/7 | 8.0.0.0 | 8.0.0.1 | 9.255.255.254 | 9.255.255.255 | 33,554,430 |
| 6 | 10.0.0.0/7 | 10.0.0.0 | 10.0.0.1 | 11.255.255.254 | 11.255.255.255 | 33,554,430 |
| 7 | 12.0.0.0/7 | 12.0.0.0 | 12.0.0.1 | 13.255.255.254 | 13.255.255.255 | 33,554,430 |
| 8 | 14.0.0.0/7 | 14.0.0.0 | 14.0.0.1 | 15.255.255.254 | 15.255.255.255 | 33,554,430 |
| 9 | 16.0.0.0/7 | 16.0.0.0 | 16.0.0.1 | 17.255.255.254 | 17.255.255.255 | 33,554,430 |
| 10 | 18.0.0.0/7 | 18.0.0.0 | 18.0.0.1 | 19.255.255.254 | 19.255.255.255 | 33,554,430 |
| 11 | 20.0.0.0/7 | 20.0.0.0 | 20.0.0.1 | 21.255.255.254 | 21.255.255.255 | 33,554,430 |
| 12 | 22.0.0.0/7 | 22.0.0.0 | 22.0.0.1 | 23.255.255.254 | 23.255.255.255 | 33,554,430 |
| 13 | 24.0.0.0/7 | 24.0.0.0 | 24.0.0.1 | 25.255.255.254 | 25.255.255.255 | 33,554,430 |
| 14 | 26.0.0.0/7 | 26.0.0.0 | 26.0.0.1 | 27.255.255.254 | 27.255.255.255 | 33,554,430 |
| 15 | 28.0.0.0/7 | 28.0.0.0 | 28.0.0.1 | 29.255.255.254 | 29.255.255.255 | 33,554,430 |
| 16 | 30.0.0.0/7 | 30.0.0.0 | 30.0.0.1 | 31.255.255.254 | 31.255.255.255 | 33,554,430 |