178.19.28.0/25
PublicClass B — /25 prefix — 126 usable hosts
Network address — the base address of the block (178.19.28.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 178.19.28.127 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 126 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 255.255.255.128 is the dotted-decimal equivalent of /25. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 178.19.28.0/25 |
| Network Address | 178.19.28.0 |
| Broadcast Address | 178.19.28.127 |
| Subnet Mask | 255.255.255.128 |
| Wildcard Mask | 0.0.0.127 |
| Prefix Length | /25 |
| IP Address Class | Class B |
| Total IP Addresses | 128 |
| Usable Host Addresses | 126 |
| First Usable IP | 178.19.28.1 |
| Last Usable IP | 178.19.28.126 |
| Network (Hex) | 0xB2131C00 |
| Broadcast (Hex) | 0xB2131C7F |
| Address Type | Public / Globally Routable |
Binary Representation
The first 25 bits (1s in the mask) identify the network. The remaining 7 bits identify hosts within the network.
Split into Equal Subnets
Split 178.19.28.0/25 into 2 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 178.19.28.0/26 | 178.19.28.0 | 178.19.28.1 | 178.19.28.62 | 178.19.28.63 | 62 |
| 2 | 178.19.28.64/26 | 178.19.28.64 | 178.19.28.65 | 178.19.28.126 | 178.19.28.127 | 62 |
Split 178.19.28.0/25 into 4 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 178.19.28.0/27 | 178.19.28.0 | 178.19.28.1 | 178.19.28.30 | 178.19.28.31 | 30 |
| 2 | 178.19.28.32/27 | 178.19.28.32 | 178.19.28.33 | 178.19.28.62 | 178.19.28.63 | 30 |
| 3 | 178.19.28.64/27 | 178.19.28.64 | 178.19.28.65 | 178.19.28.94 | 178.19.28.95 | 30 |
| 4 | 178.19.28.96/27 | 178.19.28.96 | 178.19.28.97 | 178.19.28.126 | 178.19.28.127 | 30 |
Split 178.19.28.0/25 into 8 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 178.19.28.0/28 | 178.19.28.0 | 178.19.28.1 | 178.19.28.14 | 178.19.28.15 | 14 |
| 2 | 178.19.28.16/28 | 178.19.28.16 | 178.19.28.17 | 178.19.28.30 | 178.19.28.31 | 14 |
| 3 | 178.19.28.32/28 | 178.19.28.32 | 178.19.28.33 | 178.19.28.46 | 178.19.28.47 | 14 |
| 4 | 178.19.28.48/28 | 178.19.28.48 | 178.19.28.49 | 178.19.28.62 | 178.19.28.63 | 14 |
| 5 | 178.19.28.64/28 | 178.19.28.64 | 178.19.28.65 | 178.19.28.78 | 178.19.28.79 | 14 |
| 6 | 178.19.28.80/28 | 178.19.28.80 | 178.19.28.81 | 178.19.28.94 | 178.19.28.95 | 14 |
| 7 | 178.19.28.96/28 | 178.19.28.96 | 178.19.28.97 | 178.19.28.110 | 178.19.28.111 | 14 |
| 8 | 178.19.28.112/28 | 178.19.28.112 | 178.19.28.113 | 178.19.28.126 | 178.19.28.127 | 14 |
Split 178.19.28.0/25 into 16 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 178.19.28.0/29 | 178.19.28.0 | 178.19.28.1 | 178.19.28.6 | 178.19.28.7 | 6 |
| 2 | 178.19.28.8/29 | 178.19.28.8 | 178.19.28.9 | 178.19.28.14 | 178.19.28.15 | 6 |
| 3 | 178.19.28.16/29 | 178.19.28.16 | 178.19.28.17 | 178.19.28.22 | 178.19.28.23 | 6 |
| 4 | 178.19.28.24/29 | 178.19.28.24 | 178.19.28.25 | 178.19.28.30 | 178.19.28.31 | 6 |
| 5 | 178.19.28.32/29 | 178.19.28.32 | 178.19.28.33 | 178.19.28.38 | 178.19.28.39 | 6 |
| 6 | 178.19.28.40/29 | 178.19.28.40 | 178.19.28.41 | 178.19.28.46 | 178.19.28.47 | 6 |
| 7 | 178.19.28.48/29 | 178.19.28.48 | 178.19.28.49 | 178.19.28.54 | 178.19.28.55 | 6 |
| 8 | 178.19.28.56/29 | 178.19.28.56 | 178.19.28.57 | 178.19.28.62 | 178.19.28.63 | 6 |
| 9 | 178.19.28.64/29 | 178.19.28.64 | 178.19.28.65 | 178.19.28.70 | 178.19.28.71 | 6 |
| 10 | 178.19.28.72/29 | 178.19.28.72 | 178.19.28.73 | 178.19.28.78 | 178.19.28.79 | 6 |
| 11 | 178.19.28.80/29 | 178.19.28.80 | 178.19.28.81 | 178.19.28.86 | 178.19.28.87 | 6 |
| 12 | 178.19.28.88/29 | 178.19.28.88 | 178.19.28.89 | 178.19.28.94 | 178.19.28.95 | 6 |
| 13 | 178.19.28.96/29 | 178.19.28.96 | 178.19.28.97 | 178.19.28.102 | 178.19.28.103 | 6 |
| 14 | 178.19.28.104/29 | 178.19.28.104 | 178.19.28.105 | 178.19.28.110 | 178.19.28.111 | 6 |
| 15 | 178.19.28.112/29 | 178.19.28.112 | 178.19.28.113 | 178.19.28.118 | 178.19.28.119 | 6 |
| 16 | 178.19.28.120/29 | 178.19.28.120 | 178.19.28.121 | 178.19.28.126 | 178.19.28.127 | 6 |
IP Address Sample
Showing first 16 of 128 total IPs.