18.65.187.64/27
PublicClass A — /27 prefix — 30 usable hosts
Network address — the base address of the block (18.65.187.64). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 18.65.187.95 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 30 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 255.255.255.224 is the dotted-decimal equivalent of /27. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 18.65.187.64/27 |
| Network Address | 18.65.187.64 |
| Broadcast Address | 18.65.187.95 |
| Subnet Mask | 255.255.255.224 |
| Wildcard Mask | 0.0.0.31 |
| Prefix Length | /27 |
| IP Address Class | Class A |
| Total IP Addresses | 32 |
| Usable Host Addresses | 30 |
| First Usable IP | 18.65.187.65 |
| Last Usable IP | 18.65.187.94 |
| Network (Hex) | 0x1241BB40 |
| Broadcast (Hex) | 0x1241BB5F |
| Address Type | Public / Globally Routable |
Binary Representation
The first 27 bits (1s in the mask) identify the network. The remaining 5 bits identify hosts within the network.
Split into Equal Subnets
Split 18.65.187.64/27 into 2 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 18.65.187.64/28 | 18.65.187.64 | 18.65.187.65 | 18.65.187.78 | 18.65.187.79 | 14 |
| 2 | 18.65.187.80/28 | 18.65.187.80 | 18.65.187.81 | 18.65.187.94 | 18.65.187.95 | 14 |
Split 18.65.187.64/27 into 4 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 18.65.187.64/29 | 18.65.187.64 | 18.65.187.65 | 18.65.187.70 | 18.65.187.71 | 6 |
| 2 | 18.65.187.72/29 | 18.65.187.72 | 18.65.187.73 | 18.65.187.78 | 18.65.187.79 | 6 |
| 3 | 18.65.187.80/29 | 18.65.187.80 | 18.65.187.81 | 18.65.187.86 | 18.65.187.87 | 6 |
| 4 | 18.65.187.88/29 | 18.65.187.88 | 18.65.187.89 | 18.65.187.94 | 18.65.187.95 | 6 |
Split 18.65.187.64/27 into 8 equal /30 subnets (2 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 18.65.187.64/30 | 18.65.187.64 | 18.65.187.65 | 18.65.187.66 | 18.65.187.67 | 2 |
| 2 | 18.65.187.68/30 | 18.65.187.68 | 18.65.187.69 | 18.65.187.70 | 18.65.187.71 | 2 |
| 3 | 18.65.187.72/30 | 18.65.187.72 | 18.65.187.73 | 18.65.187.74 | 18.65.187.75 | 2 |
| 4 | 18.65.187.76/30 | 18.65.187.76 | 18.65.187.77 | 18.65.187.78 | 18.65.187.79 | 2 |
| 5 | 18.65.187.80/30 | 18.65.187.80 | 18.65.187.81 | 18.65.187.82 | 18.65.187.83 | 2 |
| 6 | 18.65.187.84/30 | 18.65.187.84 | 18.65.187.85 | 18.65.187.86 | 18.65.187.87 | 2 |
| 7 | 18.65.187.88/30 | 18.65.187.88 | 18.65.187.89 | 18.65.187.90 | 18.65.187.91 | 2 |
| 8 | 18.65.187.92/30 | 18.65.187.92 | 18.65.187.93 | 18.65.187.94 | 18.65.187.95 | 2 |
IP Address Sample
Showing first 16 of 32 total IPs.