87.2.4.0/25
PublicClass A — /25 prefix — 126 usable hosts
Network address — the base address of the block (87.2.4.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 87.2.4.127 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 | 87.2.4.0/25 |
| Network Address | 87.2.4.0 |
| Broadcast Address | 87.2.4.127 |
| 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 | 87.2.4.1 |
| Last Usable IP | 87.2.4.126 |
| Network (Hex) | 0x57020400 |
| Broadcast (Hex) | 0x5702047F |
| 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 87.2.4.0/25 into 2 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 87.2.4.0/26 | 87.2.4.0 | 87.2.4.1 | 87.2.4.62 | 87.2.4.63 | 62 |
| 2 | 87.2.4.64/26 | 87.2.4.64 | 87.2.4.65 | 87.2.4.126 | 87.2.4.127 | 62 |
Split 87.2.4.0/25 into 4 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 87.2.4.0/27 | 87.2.4.0 | 87.2.4.1 | 87.2.4.30 | 87.2.4.31 | 30 |
| 2 | 87.2.4.32/27 | 87.2.4.32 | 87.2.4.33 | 87.2.4.62 | 87.2.4.63 | 30 |
| 3 | 87.2.4.64/27 | 87.2.4.64 | 87.2.4.65 | 87.2.4.94 | 87.2.4.95 | 30 |
| 4 | 87.2.4.96/27 | 87.2.4.96 | 87.2.4.97 | 87.2.4.126 | 87.2.4.127 | 30 |
Split 87.2.4.0/25 into 8 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 87.2.4.0/28 | 87.2.4.0 | 87.2.4.1 | 87.2.4.14 | 87.2.4.15 | 14 |
| 2 | 87.2.4.16/28 | 87.2.4.16 | 87.2.4.17 | 87.2.4.30 | 87.2.4.31 | 14 |
| 3 | 87.2.4.32/28 | 87.2.4.32 | 87.2.4.33 | 87.2.4.46 | 87.2.4.47 | 14 |
| 4 | 87.2.4.48/28 | 87.2.4.48 | 87.2.4.49 | 87.2.4.62 | 87.2.4.63 | 14 |
| 5 | 87.2.4.64/28 | 87.2.4.64 | 87.2.4.65 | 87.2.4.78 | 87.2.4.79 | 14 |
| 6 | 87.2.4.80/28 | 87.2.4.80 | 87.2.4.81 | 87.2.4.94 | 87.2.4.95 | 14 |
| 7 | 87.2.4.96/28 | 87.2.4.96 | 87.2.4.97 | 87.2.4.110 | 87.2.4.111 | 14 |
| 8 | 87.2.4.112/28 | 87.2.4.112 | 87.2.4.113 | 87.2.4.126 | 87.2.4.127 | 14 |
Split 87.2.4.0/25 into 16 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 87.2.4.0/29 | 87.2.4.0 | 87.2.4.1 | 87.2.4.6 | 87.2.4.7 | 6 |
| 2 | 87.2.4.8/29 | 87.2.4.8 | 87.2.4.9 | 87.2.4.14 | 87.2.4.15 | 6 |
| 3 | 87.2.4.16/29 | 87.2.4.16 | 87.2.4.17 | 87.2.4.22 | 87.2.4.23 | 6 |
| 4 | 87.2.4.24/29 | 87.2.4.24 | 87.2.4.25 | 87.2.4.30 | 87.2.4.31 | 6 |
| 5 | 87.2.4.32/29 | 87.2.4.32 | 87.2.4.33 | 87.2.4.38 | 87.2.4.39 | 6 |
| 6 | 87.2.4.40/29 | 87.2.4.40 | 87.2.4.41 | 87.2.4.46 | 87.2.4.47 | 6 |
| 7 | 87.2.4.48/29 | 87.2.4.48 | 87.2.4.49 | 87.2.4.54 | 87.2.4.55 | 6 |
| 8 | 87.2.4.56/29 | 87.2.4.56 | 87.2.4.57 | 87.2.4.62 | 87.2.4.63 | 6 |
| 9 | 87.2.4.64/29 | 87.2.4.64 | 87.2.4.65 | 87.2.4.70 | 87.2.4.71 | 6 |
| 10 | 87.2.4.72/29 | 87.2.4.72 | 87.2.4.73 | 87.2.4.78 | 87.2.4.79 | 6 |
| 11 | 87.2.4.80/29 | 87.2.4.80 | 87.2.4.81 | 87.2.4.86 | 87.2.4.87 | 6 |
| 12 | 87.2.4.88/29 | 87.2.4.88 | 87.2.4.89 | 87.2.4.94 | 87.2.4.95 | 6 |
| 13 | 87.2.4.96/29 | 87.2.4.96 | 87.2.4.97 | 87.2.4.102 | 87.2.4.103 | 6 |
| 14 | 87.2.4.104/29 | 87.2.4.104 | 87.2.4.105 | 87.2.4.110 | 87.2.4.111 | 6 |
| 15 | 87.2.4.112/29 | 87.2.4.112 | 87.2.4.113 | 87.2.4.118 | 87.2.4.119 | 6 |
| 16 | 87.2.4.120/29 | 87.2.4.120 | 87.2.4.121 | 87.2.4.126 | 87.2.4.127 | 6 |
IP Address Sample
Showing first 16 of 128 total IPs.