251.75.251.0/25
PublicClass E (Reserved) — /25 prefix — 126 usable hosts
Network address — the base address of the block (251.75.251.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 251.75.251.127 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 | 251.75.251.0/25 |
| Network Address | 251.75.251.0 |
| Broadcast Address | 251.75.251.127 |
| Subnet Mask | 255.255.255.128 |
| Wildcard Mask | 0.0.0.127 |
| Prefix Length | /25 |
| IP Address Class | Class E (Reserved) |
| Total IP Addresses | 128 |
| Usable Host Addresses | 126 |
| First Usable IP | 251.75.251.1 |
| Last Usable IP | 251.75.251.126 |
| Network (Hex) | 0xFB4BFB00 |
| Broadcast (Hex) | 0xFB4BFB7F |
| 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 251.75.251.0/25 into 2 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 251.75.251.0/26 | 251.75.251.0 | 251.75.251.1 | 251.75.251.62 | 251.75.251.63 | 62 |
| 2 | 251.75.251.64/26 | 251.75.251.64 | 251.75.251.65 | 251.75.251.126 | 251.75.251.127 | 62 |
Split 251.75.251.0/25 into 4 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 251.75.251.0/27 | 251.75.251.0 | 251.75.251.1 | 251.75.251.30 | 251.75.251.31 | 30 |
| 2 | 251.75.251.32/27 | 251.75.251.32 | 251.75.251.33 | 251.75.251.62 | 251.75.251.63 | 30 |
| 3 | 251.75.251.64/27 | 251.75.251.64 | 251.75.251.65 | 251.75.251.94 | 251.75.251.95 | 30 |
| 4 | 251.75.251.96/27 | 251.75.251.96 | 251.75.251.97 | 251.75.251.126 | 251.75.251.127 | 30 |
Split 251.75.251.0/25 into 8 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 251.75.251.0/28 | 251.75.251.0 | 251.75.251.1 | 251.75.251.14 | 251.75.251.15 | 14 |
| 2 | 251.75.251.16/28 | 251.75.251.16 | 251.75.251.17 | 251.75.251.30 | 251.75.251.31 | 14 |
| 3 | 251.75.251.32/28 | 251.75.251.32 | 251.75.251.33 | 251.75.251.46 | 251.75.251.47 | 14 |
| 4 | 251.75.251.48/28 | 251.75.251.48 | 251.75.251.49 | 251.75.251.62 | 251.75.251.63 | 14 |
| 5 | 251.75.251.64/28 | 251.75.251.64 | 251.75.251.65 | 251.75.251.78 | 251.75.251.79 | 14 |
| 6 | 251.75.251.80/28 | 251.75.251.80 | 251.75.251.81 | 251.75.251.94 | 251.75.251.95 | 14 |
| 7 | 251.75.251.96/28 | 251.75.251.96 | 251.75.251.97 | 251.75.251.110 | 251.75.251.111 | 14 |
| 8 | 251.75.251.112/28 | 251.75.251.112 | 251.75.251.113 | 251.75.251.126 | 251.75.251.127 | 14 |
Split 251.75.251.0/25 into 16 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 251.75.251.0/29 | 251.75.251.0 | 251.75.251.1 | 251.75.251.6 | 251.75.251.7 | 6 |
| 2 | 251.75.251.8/29 | 251.75.251.8 | 251.75.251.9 | 251.75.251.14 | 251.75.251.15 | 6 |
| 3 | 251.75.251.16/29 | 251.75.251.16 | 251.75.251.17 | 251.75.251.22 | 251.75.251.23 | 6 |
| 4 | 251.75.251.24/29 | 251.75.251.24 | 251.75.251.25 | 251.75.251.30 | 251.75.251.31 | 6 |
| 5 | 251.75.251.32/29 | 251.75.251.32 | 251.75.251.33 | 251.75.251.38 | 251.75.251.39 | 6 |
| 6 | 251.75.251.40/29 | 251.75.251.40 | 251.75.251.41 | 251.75.251.46 | 251.75.251.47 | 6 |
| 7 | 251.75.251.48/29 | 251.75.251.48 | 251.75.251.49 | 251.75.251.54 | 251.75.251.55 | 6 |
| 8 | 251.75.251.56/29 | 251.75.251.56 | 251.75.251.57 | 251.75.251.62 | 251.75.251.63 | 6 |
| 9 | 251.75.251.64/29 | 251.75.251.64 | 251.75.251.65 | 251.75.251.70 | 251.75.251.71 | 6 |
| 10 | 251.75.251.72/29 | 251.75.251.72 | 251.75.251.73 | 251.75.251.78 | 251.75.251.79 | 6 |
| 11 | 251.75.251.80/29 | 251.75.251.80 | 251.75.251.81 | 251.75.251.86 | 251.75.251.87 | 6 |
| 12 | 251.75.251.88/29 | 251.75.251.88 | 251.75.251.89 | 251.75.251.94 | 251.75.251.95 | 6 |
| 13 | 251.75.251.96/29 | 251.75.251.96 | 251.75.251.97 | 251.75.251.102 | 251.75.251.103 | 6 |
| 14 | 251.75.251.104/29 | 251.75.251.104 | 251.75.251.105 | 251.75.251.110 | 251.75.251.111 | 6 |
| 15 | 251.75.251.112/29 | 251.75.251.112 | 251.75.251.113 | 251.75.251.118 | 251.75.251.119 | 6 |
| 16 | 251.75.251.120/29 | 251.75.251.120 | 251.75.251.121 | 251.75.251.126 | 251.75.251.127 | 6 |
IP Address Sample
Showing first 16 of 128 total IPs.