18.64.0.0/14
PublicClass A — /14 prefix — 262,142 usable hosts
Network address — the base address of the block (18.64.0.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 18.67.255.255 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 262,142 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 255.252.0.0 is the dotted-decimal equivalent of /14. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 18.64.0.0/14 |
| Network Address | 18.64.0.0 |
| Broadcast Address | 18.67.255.255 |
| Subnet Mask | 255.252.0.0 |
| Wildcard Mask | 0.3.255.255 |
| Prefix Length | /14 |
| IP Address Class | Class A |
| Total IP Addresses | 262,144 |
| Usable Host Addresses | 262,142 |
| First Usable IP | 18.64.0.1 |
| Last Usable IP | 18.67.255.254 |
| Network (Hex) | 0x12400000 |
| Broadcast (Hex) | 0x1243FFFF |
| Address Type | Public / Globally Routable |
Binary Representation
The first 14 bits (1s in the mask) identify the network. The remaining 18 bits identify hosts within the network.
Subnet Breakdown — splitting into /15
This /14 block can be divided into 2 /15 subnets.
| CIDR | Network | Broadcast | First Usable | Last Usable | Hosts |
|---|---|---|---|---|---|
| 18.64.0.0/15 | 18.64.0.0 | 18.65.255.255 | 18.64.0.1 | 18.65.255.254 | 131,070 |
| 18.66.0.0/15 | 18.66.0.0 | 18.67.255.255 | 18.66.0.1 | 18.67.255.254 | 131,070 |