51.239.43.0/25
PublicClass A — /25 prefix — 126 usable hosts
Network address — the base address of the block (51.239.43.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 51.239.43.127 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 | 51.239.43.0/25 |
| Network Address | 51.239.43.0 |
| Broadcast Address | 51.239.43.127 |
| Subnet Mask | 255.255.255.128 |
| Wildcard Mask | 0.0.0.127 |
| Prefix Length | /25 |
| IP Address Class | Class A |
| Total IP Addresses | 128 |
| Usable Host Addresses | 126 |
| First Usable IP | 51.239.43.1 |
| Last Usable IP | 51.239.43.126 |
| Network (Hex) | 0x33EF2B00 |
| Broadcast (Hex) | 0x33EF2B7F |
| 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 51.239.43.0/25 into 2 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 51.239.43.0/26 | 51.239.43.0 | 51.239.43.1 | 51.239.43.62 | 51.239.43.63 | 62 |
| 2 | 51.239.43.64/26 | 51.239.43.64 | 51.239.43.65 | 51.239.43.126 | 51.239.43.127 | 62 |
Split 51.239.43.0/25 into 4 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 51.239.43.0/27 | 51.239.43.0 | 51.239.43.1 | 51.239.43.30 | 51.239.43.31 | 30 |
| 2 | 51.239.43.32/27 | 51.239.43.32 | 51.239.43.33 | 51.239.43.62 | 51.239.43.63 | 30 |
| 3 | 51.239.43.64/27 | 51.239.43.64 | 51.239.43.65 | 51.239.43.94 | 51.239.43.95 | 30 |
| 4 | 51.239.43.96/27 | 51.239.43.96 | 51.239.43.97 | 51.239.43.126 | 51.239.43.127 | 30 |
Split 51.239.43.0/25 into 8 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 51.239.43.0/28 | 51.239.43.0 | 51.239.43.1 | 51.239.43.14 | 51.239.43.15 | 14 |
| 2 | 51.239.43.16/28 | 51.239.43.16 | 51.239.43.17 | 51.239.43.30 | 51.239.43.31 | 14 |
| 3 | 51.239.43.32/28 | 51.239.43.32 | 51.239.43.33 | 51.239.43.46 | 51.239.43.47 | 14 |
| 4 | 51.239.43.48/28 | 51.239.43.48 | 51.239.43.49 | 51.239.43.62 | 51.239.43.63 | 14 |
| 5 | 51.239.43.64/28 | 51.239.43.64 | 51.239.43.65 | 51.239.43.78 | 51.239.43.79 | 14 |
| 6 | 51.239.43.80/28 | 51.239.43.80 | 51.239.43.81 | 51.239.43.94 | 51.239.43.95 | 14 |
| 7 | 51.239.43.96/28 | 51.239.43.96 | 51.239.43.97 | 51.239.43.110 | 51.239.43.111 | 14 |
| 8 | 51.239.43.112/28 | 51.239.43.112 | 51.239.43.113 | 51.239.43.126 | 51.239.43.127 | 14 |
Split 51.239.43.0/25 into 16 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 51.239.43.0/29 | 51.239.43.0 | 51.239.43.1 | 51.239.43.6 | 51.239.43.7 | 6 |
| 2 | 51.239.43.8/29 | 51.239.43.8 | 51.239.43.9 | 51.239.43.14 | 51.239.43.15 | 6 |
| 3 | 51.239.43.16/29 | 51.239.43.16 | 51.239.43.17 | 51.239.43.22 | 51.239.43.23 | 6 |
| 4 | 51.239.43.24/29 | 51.239.43.24 | 51.239.43.25 | 51.239.43.30 | 51.239.43.31 | 6 |
| 5 | 51.239.43.32/29 | 51.239.43.32 | 51.239.43.33 | 51.239.43.38 | 51.239.43.39 | 6 |
| 6 | 51.239.43.40/29 | 51.239.43.40 | 51.239.43.41 | 51.239.43.46 | 51.239.43.47 | 6 |
| 7 | 51.239.43.48/29 | 51.239.43.48 | 51.239.43.49 | 51.239.43.54 | 51.239.43.55 | 6 |
| 8 | 51.239.43.56/29 | 51.239.43.56 | 51.239.43.57 | 51.239.43.62 | 51.239.43.63 | 6 |
| 9 | 51.239.43.64/29 | 51.239.43.64 | 51.239.43.65 | 51.239.43.70 | 51.239.43.71 | 6 |
| 10 | 51.239.43.72/29 | 51.239.43.72 | 51.239.43.73 | 51.239.43.78 | 51.239.43.79 | 6 |
| 11 | 51.239.43.80/29 | 51.239.43.80 | 51.239.43.81 | 51.239.43.86 | 51.239.43.87 | 6 |
| 12 | 51.239.43.88/29 | 51.239.43.88 | 51.239.43.89 | 51.239.43.94 | 51.239.43.95 | 6 |
| 13 | 51.239.43.96/29 | 51.239.43.96 | 51.239.43.97 | 51.239.43.102 | 51.239.43.103 | 6 |
| 14 | 51.239.43.104/29 | 51.239.43.104 | 51.239.43.105 | 51.239.43.110 | 51.239.43.111 | 6 |
| 15 | 51.239.43.112/29 | 51.239.43.112 | 51.239.43.113 | 51.239.43.118 | 51.239.43.119 | 6 |
| 16 | 51.239.43.120/29 | 51.239.43.120 | 51.239.43.121 | 51.239.43.126 | 51.239.43.127 | 6 |
IP Address Sample
Showing first 16 of 128 total IPs.