18.237.81.64/26
PublicClass A — /26 prefix — 62 usable hosts
Network address — the base address of the block (18.237.81.64). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 18.237.81.127 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 62 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 255.255.255.192 is the dotted-decimal equivalent of /26. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 18.237.81.64/26 |
| Network Address | 18.237.81.64 |
| Broadcast Address | 18.237.81.127 |
| Subnet Mask | 255.255.255.192 |
| Wildcard Mask | 0.0.0.63 |
| Prefix Length | /26 |
| IP Address Class | Class A |
| Total IP Addresses | 64 |
| Usable Host Addresses | 62 |
| First Usable IP | 18.237.81.65 |
| Last Usable IP | 18.237.81.126 |
| Network (Hex) | 0x12ED5140 |
| Broadcast (Hex) | 0x12ED517F |
| Address Type | Public / Globally Routable |
Binary Representation
The first 26 bits (1s in the mask) identify the network. The remaining 6 bits identify hosts within the network.
Subnet Breakdown — splitting into /27
This /26 block can be divided into 2 /27 subnets.
| CIDR | Network | Broadcast | First Usable | Last Usable | Hosts |
|---|---|---|---|---|---|
| 18.237.81.64/27 | 18.237.81.64 | 18.237.81.95 | 18.237.81.65 | 18.237.81.94 | 30 |
| 18.237.81.96/27 | 18.237.81.96 | 18.237.81.127 | 18.237.81.97 | 18.237.81.126 | 30 |
IP Address Sample
Showing first 16 of 64 total IPs.