123.131.78.64/27
PublicClass A — /27 prefix — 30 usable hosts
Network address — the base address of the block (123.131.78.64). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 123.131.78.95 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 | 123.131.78.64/27 |
| Network Address | 123.131.78.64 |
| Broadcast Address | 123.131.78.95 |
| 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 | 123.131.78.65 |
| Last Usable IP | 123.131.78.94 |
| Network (Hex) | 0x7B834E40 |
| Broadcast (Hex) | 0x7B834E5F |
| 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 123.131.78.64/27 into 2 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 123.131.78.64/28 | 123.131.78.64 | 123.131.78.65 | 123.131.78.78 | 123.131.78.79 | 14 |
| 2 | 123.131.78.80/28 | 123.131.78.80 | 123.131.78.81 | 123.131.78.94 | 123.131.78.95 | 14 |
Split 123.131.78.64/27 into 4 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 123.131.78.64/29 | 123.131.78.64 | 123.131.78.65 | 123.131.78.70 | 123.131.78.71 | 6 |
| 2 | 123.131.78.72/29 | 123.131.78.72 | 123.131.78.73 | 123.131.78.78 | 123.131.78.79 | 6 |
| 3 | 123.131.78.80/29 | 123.131.78.80 | 123.131.78.81 | 123.131.78.86 | 123.131.78.87 | 6 |
| 4 | 123.131.78.88/29 | 123.131.78.88 | 123.131.78.89 | 123.131.78.94 | 123.131.78.95 | 6 |
Split 123.131.78.64/27 into 8 equal /30 subnets (2 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 123.131.78.64/30 | 123.131.78.64 | 123.131.78.65 | 123.131.78.66 | 123.131.78.67 | 2 |
| 2 | 123.131.78.68/30 | 123.131.78.68 | 123.131.78.69 | 123.131.78.70 | 123.131.78.71 | 2 |
| 3 | 123.131.78.72/30 | 123.131.78.72 | 123.131.78.73 | 123.131.78.74 | 123.131.78.75 | 2 |
| 4 | 123.131.78.76/30 | 123.131.78.76 | 123.131.78.77 | 123.131.78.78 | 123.131.78.79 | 2 |
| 5 | 123.131.78.80/30 | 123.131.78.80 | 123.131.78.81 | 123.131.78.82 | 123.131.78.83 | 2 |
| 6 | 123.131.78.84/30 | 123.131.78.84 | 123.131.78.85 | 123.131.78.86 | 123.131.78.87 | 2 |
| 7 | 123.131.78.88/30 | 123.131.78.88 | 123.131.78.89 | 123.131.78.90 | 123.131.78.91 | 2 |
| 8 | 123.131.78.92/30 | 123.131.78.92 | 123.131.78.93 | 123.131.78.94 | 123.131.78.95 | 2 |
IP Address Sample
Showing first 16 of 32 total IPs.