172.128.192.64/27
PublicClass B — /27 prefix — 30 usable hosts
Network address — the base address of the block (172.128.192.64). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 172.128.192.95 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 | 172.128.192.64/27 |
| Network Address | 172.128.192.64 |
| Broadcast Address | 172.128.192.95 |
| Subnet Mask | 255.255.255.224 |
| Wildcard Mask | 0.0.0.31 |
| Prefix Length | /27 |
| IP Address Class | Class B |
| Total IP Addresses | 32 |
| Usable Host Addresses | 30 |
| First Usable IP | 172.128.192.65 |
| Last Usable IP | 172.128.192.94 |
| Network (Hex) | 0xAC80C040 |
| Broadcast (Hex) | 0xAC80C05F |
| 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 172.128.192.64/27 into 2 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 172.128.192.64/28 | 172.128.192.64 | 172.128.192.65 | 172.128.192.78 | 172.128.192.79 | 14 |
| 2 | 172.128.192.80/28 | 172.128.192.80 | 172.128.192.81 | 172.128.192.94 | 172.128.192.95 | 14 |
Split 172.128.192.64/27 into 4 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 172.128.192.64/29 | 172.128.192.64 | 172.128.192.65 | 172.128.192.70 | 172.128.192.71 | 6 |
| 2 | 172.128.192.72/29 | 172.128.192.72 | 172.128.192.73 | 172.128.192.78 | 172.128.192.79 | 6 |
| 3 | 172.128.192.80/29 | 172.128.192.80 | 172.128.192.81 | 172.128.192.86 | 172.128.192.87 | 6 |
| 4 | 172.128.192.88/29 | 172.128.192.88 | 172.128.192.89 | 172.128.192.94 | 172.128.192.95 | 6 |
Split 172.128.192.64/27 into 8 equal /30 subnets (2 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 172.128.192.64/30 | 172.128.192.64 | 172.128.192.65 | 172.128.192.66 | 172.128.192.67 | 2 |
| 2 | 172.128.192.68/30 | 172.128.192.68 | 172.128.192.69 | 172.128.192.70 | 172.128.192.71 | 2 |
| 3 | 172.128.192.72/30 | 172.128.192.72 | 172.128.192.73 | 172.128.192.74 | 172.128.192.75 | 2 |
| 4 | 172.128.192.76/30 | 172.128.192.76 | 172.128.192.77 | 172.128.192.78 | 172.128.192.79 | 2 |
| 5 | 172.128.192.80/30 | 172.128.192.80 | 172.128.192.81 | 172.128.192.82 | 172.128.192.83 | 2 |
| 6 | 172.128.192.84/30 | 172.128.192.84 | 172.128.192.85 | 172.128.192.86 | 172.128.192.87 | 2 |
| 7 | 172.128.192.88/30 | 172.128.192.88 | 172.128.192.89 | 172.128.192.90 | 172.128.192.91 | 2 |
| 8 | 172.128.192.92/30 | 172.128.192.92 | 172.128.192.93 | 172.128.192.94 | 172.128.192.95 | 2 |
IP Address Sample
Showing first 16 of 32 total IPs.