187.243.1.0/25
PublicClass B — /25 prefix — 126 usable hosts
Network address — the base address of the block (187.243.1.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 187.243.1.127 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 | 187.243.1.0/25 |
| Network Address | 187.243.1.0 |
| Broadcast Address | 187.243.1.127 |
| 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 | 187.243.1.1 |
| Last Usable IP | 187.243.1.126 |
| Network (Hex) | 0xBBF30100 |
| Broadcast (Hex) | 0xBBF3017F |
| 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 187.243.1.0/25 into 2 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 187.243.1.0/26 | 187.243.1.0 | 187.243.1.1 | 187.243.1.62 | 187.243.1.63 | 62 |
| 2 | 187.243.1.64/26 | 187.243.1.64 | 187.243.1.65 | 187.243.1.126 | 187.243.1.127 | 62 |
Split 187.243.1.0/25 into 4 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 187.243.1.0/27 | 187.243.1.0 | 187.243.1.1 | 187.243.1.30 | 187.243.1.31 | 30 |
| 2 | 187.243.1.32/27 | 187.243.1.32 | 187.243.1.33 | 187.243.1.62 | 187.243.1.63 | 30 |
| 3 | 187.243.1.64/27 | 187.243.1.64 | 187.243.1.65 | 187.243.1.94 | 187.243.1.95 | 30 |
| 4 | 187.243.1.96/27 | 187.243.1.96 | 187.243.1.97 | 187.243.1.126 | 187.243.1.127 | 30 |
Split 187.243.1.0/25 into 8 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 187.243.1.0/28 | 187.243.1.0 | 187.243.1.1 | 187.243.1.14 | 187.243.1.15 | 14 |
| 2 | 187.243.1.16/28 | 187.243.1.16 | 187.243.1.17 | 187.243.1.30 | 187.243.1.31 | 14 |
| 3 | 187.243.1.32/28 | 187.243.1.32 | 187.243.1.33 | 187.243.1.46 | 187.243.1.47 | 14 |
| 4 | 187.243.1.48/28 | 187.243.1.48 | 187.243.1.49 | 187.243.1.62 | 187.243.1.63 | 14 |
| 5 | 187.243.1.64/28 | 187.243.1.64 | 187.243.1.65 | 187.243.1.78 | 187.243.1.79 | 14 |
| 6 | 187.243.1.80/28 | 187.243.1.80 | 187.243.1.81 | 187.243.1.94 | 187.243.1.95 | 14 |
| 7 | 187.243.1.96/28 | 187.243.1.96 | 187.243.1.97 | 187.243.1.110 | 187.243.1.111 | 14 |
| 8 | 187.243.1.112/28 | 187.243.1.112 | 187.243.1.113 | 187.243.1.126 | 187.243.1.127 | 14 |
Split 187.243.1.0/25 into 16 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 187.243.1.0/29 | 187.243.1.0 | 187.243.1.1 | 187.243.1.6 | 187.243.1.7 | 6 |
| 2 | 187.243.1.8/29 | 187.243.1.8 | 187.243.1.9 | 187.243.1.14 | 187.243.1.15 | 6 |
| 3 | 187.243.1.16/29 | 187.243.1.16 | 187.243.1.17 | 187.243.1.22 | 187.243.1.23 | 6 |
| 4 | 187.243.1.24/29 | 187.243.1.24 | 187.243.1.25 | 187.243.1.30 | 187.243.1.31 | 6 |
| 5 | 187.243.1.32/29 | 187.243.1.32 | 187.243.1.33 | 187.243.1.38 | 187.243.1.39 | 6 |
| 6 | 187.243.1.40/29 | 187.243.1.40 | 187.243.1.41 | 187.243.1.46 | 187.243.1.47 | 6 |
| 7 | 187.243.1.48/29 | 187.243.1.48 | 187.243.1.49 | 187.243.1.54 | 187.243.1.55 | 6 |
| 8 | 187.243.1.56/29 | 187.243.1.56 | 187.243.1.57 | 187.243.1.62 | 187.243.1.63 | 6 |
| 9 | 187.243.1.64/29 | 187.243.1.64 | 187.243.1.65 | 187.243.1.70 | 187.243.1.71 | 6 |
| 10 | 187.243.1.72/29 | 187.243.1.72 | 187.243.1.73 | 187.243.1.78 | 187.243.1.79 | 6 |
| 11 | 187.243.1.80/29 | 187.243.1.80 | 187.243.1.81 | 187.243.1.86 | 187.243.1.87 | 6 |
| 12 | 187.243.1.88/29 | 187.243.1.88 | 187.243.1.89 | 187.243.1.94 | 187.243.1.95 | 6 |
| 13 | 187.243.1.96/29 | 187.243.1.96 | 187.243.1.97 | 187.243.1.102 | 187.243.1.103 | 6 |
| 14 | 187.243.1.104/29 | 187.243.1.104 | 187.243.1.105 | 187.243.1.110 | 187.243.1.111 | 6 |
| 15 | 187.243.1.112/29 | 187.243.1.112 | 187.243.1.113 | 187.243.1.118 | 187.243.1.119 | 6 |
| 16 | 187.243.1.120/29 | 187.243.1.120 | 187.243.1.121 | 187.243.1.126 | 187.243.1.127 | 6 |
IP Address Sample
Showing first 16 of 128 total IPs.