178.19.23.0/25
PublicClass B — /25 prefix — 126 usable hosts
Network address — the base address of the block (178.19.23.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 178.19.23.127 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 | 178.19.23.0/25 |
| Network Address | 178.19.23.0 |
| Broadcast Address | 178.19.23.127 |
| 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 | 178.19.23.1 |
| Last Usable IP | 178.19.23.126 |
| Network (Hex) | 0xB2131700 |
| Broadcast (Hex) | 0xB213177F |
| 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 178.19.23.0/25 into 2 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 178.19.23.0/26 | 178.19.23.0 | 178.19.23.1 | 178.19.23.62 | 178.19.23.63 | 62 |
| 2 | 178.19.23.64/26 | 178.19.23.64 | 178.19.23.65 | 178.19.23.126 | 178.19.23.127 | 62 |
Split 178.19.23.0/25 into 4 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 178.19.23.0/27 | 178.19.23.0 | 178.19.23.1 | 178.19.23.30 | 178.19.23.31 | 30 |
| 2 | 178.19.23.32/27 | 178.19.23.32 | 178.19.23.33 | 178.19.23.62 | 178.19.23.63 | 30 |
| 3 | 178.19.23.64/27 | 178.19.23.64 | 178.19.23.65 | 178.19.23.94 | 178.19.23.95 | 30 |
| 4 | 178.19.23.96/27 | 178.19.23.96 | 178.19.23.97 | 178.19.23.126 | 178.19.23.127 | 30 |
Split 178.19.23.0/25 into 8 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 178.19.23.0/28 | 178.19.23.0 | 178.19.23.1 | 178.19.23.14 | 178.19.23.15 | 14 |
| 2 | 178.19.23.16/28 | 178.19.23.16 | 178.19.23.17 | 178.19.23.30 | 178.19.23.31 | 14 |
| 3 | 178.19.23.32/28 | 178.19.23.32 | 178.19.23.33 | 178.19.23.46 | 178.19.23.47 | 14 |
| 4 | 178.19.23.48/28 | 178.19.23.48 | 178.19.23.49 | 178.19.23.62 | 178.19.23.63 | 14 |
| 5 | 178.19.23.64/28 | 178.19.23.64 | 178.19.23.65 | 178.19.23.78 | 178.19.23.79 | 14 |
| 6 | 178.19.23.80/28 | 178.19.23.80 | 178.19.23.81 | 178.19.23.94 | 178.19.23.95 | 14 |
| 7 | 178.19.23.96/28 | 178.19.23.96 | 178.19.23.97 | 178.19.23.110 | 178.19.23.111 | 14 |
| 8 | 178.19.23.112/28 | 178.19.23.112 | 178.19.23.113 | 178.19.23.126 | 178.19.23.127 | 14 |
Split 178.19.23.0/25 into 16 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 178.19.23.0/29 | 178.19.23.0 | 178.19.23.1 | 178.19.23.6 | 178.19.23.7 | 6 |
| 2 | 178.19.23.8/29 | 178.19.23.8 | 178.19.23.9 | 178.19.23.14 | 178.19.23.15 | 6 |
| 3 | 178.19.23.16/29 | 178.19.23.16 | 178.19.23.17 | 178.19.23.22 | 178.19.23.23 | 6 |
| 4 | 178.19.23.24/29 | 178.19.23.24 | 178.19.23.25 | 178.19.23.30 | 178.19.23.31 | 6 |
| 5 | 178.19.23.32/29 | 178.19.23.32 | 178.19.23.33 | 178.19.23.38 | 178.19.23.39 | 6 |
| 6 | 178.19.23.40/29 | 178.19.23.40 | 178.19.23.41 | 178.19.23.46 | 178.19.23.47 | 6 |
| 7 | 178.19.23.48/29 | 178.19.23.48 | 178.19.23.49 | 178.19.23.54 | 178.19.23.55 | 6 |
| 8 | 178.19.23.56/29 | 178.19.23.56 | 178.19.23.57 | 178.19.23.62 | 178.19.23.63 | 6 |
| 9 | 178.19.23.64/29 | 178.19.23.64 | 178.19.23.65 | 178.19.23.70 | 178.19.23.71 | 6 |
| 10 | 178.19.23.72/29 | 178.19.23.72 | 178.19.23.73 | 178.19.23.78 | 178.19.23.79 | 6 |
| 11 | 178.19.23.80/29 | 178.19.23.80 | 178.19.23.81 | 178.19.23.86 | 178.19.23.87 | 6 |
| 12 | 178.19.23.88/29 | 178.19.23.88 | 178.19.23.89 | 178.19.23.94 | 178.19.23.95 | 6 |
| 13 | 178.19.23.96/29 | 178.19.23.96 | 178.19.23.97 | 178.19.23.102 | 178.19.23.103 | 6 |
| 14 | 178.19.23.104/29 | 178.19.23.104 | 178.19.23.105 | 178.19.23.110 | 178.19.23.111 | 6 |
| 15 | 178.19.23.112/29 | 178.19.23.112 | 178.19.23.113 | 178.19.23.118 | 178.19.23.119 | 6 |
| 16 | 178.19.23.120/29 | 178.19.23.120 | 178.19.23.121 | 178.19.23.126 | 178.19.23.127 | 6 |
IP Address Sample
Showing first 16 of 128 total IPs.