0.0.0.0/4
PublicClass A — /4 prefix — 268,435,454 usable hosts
Network Address
0.0.0.0
Broadcast Address
15.255.255.255
Subnet Mask
240.0.0.0
Usable Hosts
268,435,454
First Usable IP
0.0.0.1
Last Usable IP
15.255.255.254
Total IPs
268,435,456
Prefix Length
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 15.255.255.255 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 | 0.0.0.0/4 |
| Network Address | 0.0.0.0 |
| Broadcast Address | 15.255.255.255 |
| 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 | 0.0.0.1 |
| Last Usable IP | 15.255.255.254 |
| Network (Hex) | 0x00000000 |
| Broadcast (Hex) | 0x0FFFFFFF |
| Address Type | Public / Globally Routable |
Binary Representation
Network Address
000
00000000.00000000.00000000.00000000
Subnet Mask
11110000.00000000.00000000.00000000
The first 4 bits (1s in the mask) identify the network. The remaining 28 bits identify hosts within the network.
/4 Subnet Reference
Total IPs
268,435,456
Usable Hosts
268,435,454
Subnet Mask
240.0.0.0
Wildcard
15.255.255.255