172.237.142.0/25
PublicClass B — /25 prefix — 126 usable hosts
Network address — the base address of the block (172.237.142.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 172.237.142.127 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 | 172.237.142.0/25 |
| Network Address | 172.237.142.0 |
| Broadcast Address | 172.237.142.127 |
| 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 | 172.237.142.1 |
| Last Usable IP | 172.237.142.126 |
| Network (Hex) | 0xACED8E00 |
| Broadcast (Hex) | 0xACED8E7F |
| 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 172.237.142.0/25 into 2 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 172.237.142.0/26 | 172.237.142.0 | 172.237.142.1 | 172.237.142.62 | 172.237.142.63 | 62 |
| 2 | 172.237.142.64/26 | 172.237.142.64 | 172.237.142.65 | 172.237.142.126 | 172.237.142.127 | 62 |
Split 172.237.142.0/25 into 4 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 172.237.142.0/27 | 172.237.142.0 | 172.237.142.1 | 172.237.142.30 | 172.237.142.31 | 30 |
| 2 | 172.237.142.32/27 | 172.237.142.32 | 172.237.142.33 | 172.237.142.62 | 172.237.142.63 | 30 |
| 3 | 172.237.142.64/27 | 172.237.142.64 | 172.237.142.65 | 172.237.142.94 | 172.237.142.95 | 30 |
| 4 | 172.237.142.96/27 | 172.237.142.96 | 172.237.142.97 | 172.237.142.126 | 172.237.142.127 | 30 |
Split 172.237.142.0/25 into 8 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 172.237.142.0/28 | 172.237.142.0 | 172.237.142.1 | 172.237.142.14 | 172.237.142.15 | 14 |
| 2 | 172.237.142.16/28 | 172.237.142.16 | 172.237.142.17 | 172.237.142.30 | 172.237.142.31 | 14 |
| 3 | 172.237.142.32/28 | 172.237.142.32 | 172.237.142.33 | 172.237.142.46 | 172.237.142.47 | 14 |
| 4 | 172.237.142.48/28 | 172.237.142.48 | 172.237.142.49 | 172.237.142.62 | 172.237.142.63 | 14 |
| 5 | 172.237.142.64/28 | 172.237.142.64 | 172.237.142.65 | 172.237.142.78 | 172.237.142.79 | 14 |
| 6 | 172.237.142.80/28 | 172.237.142.80 | 172.237.142.81 | 172.237.142.94 | 172.237.142.95 | 14 |
| 7 | 172.237.142.96/28 | 172.237.142.96 | 172.237.142.97 | 172.237.142.110 | 172.237.142.111 | 14 |
| 8 | 172.237.142.112/28 | 172.237.142.112 | 172.237.142.113 | 172.237.142.126 | 172.237.142.127 | 14 |
Split 172.237.142.0/25 into 16 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 172.237.142.0/29 | 172.237.142.0 | 172.237.142.1 | 172.237.142.6 | 172.237.142.7 | 6 |
| 2 | 172.237.142.8/29 | 172.237.142.8 | 172.237.142.9 | 172.237.142.14 | 172.237.142.15 | 6 |
| 3 | 172.237.142.16/29 | 172.237.142.16 | 172.237.142.17 | 172.237.142.22 | 172.237.142.23 | 6 |
| 4 | 172.237.142.24/29 | 172.237.142.24 | 172.237.142.25 | 172.237.142.30 | 172.237.142.31 | 6 |
| 5 | 172.237.142.32/29 | 172.237.142.32 | 172.237.142.33 | 172.237.142.38 | 172.237.142.39 | 6 |
| 6 | 172.237.142.40/29 | 172.237.142.40 | 172.237.142.41 | 172.237.142.46 | 172.237.142.47 | 6 |
| 7 | 172.237.142.48/29 | 172.237.142.48 | 172.237.142.49 | 172.237.142.54 | 172.237.142.55 | 6 |
| 8 | 172.237.142.56/29 | 172.237.142.56 | 172.237.142.57 | 172.237.142.62 | 172.237.142.63 | 6 |
| 9 | 172.237.142.64/29 | 172.237.142.64 | 172.237.142.65 | 172.237.142.70 | 172.237.142.71 | 6 |
| 10 | 172.237.142.72/29 | 172.237.142.72 | 172.237.142.73 | 172.237.142.78 | 172.237.142.79 | 6 |
| 11 | 172.237.142.80/29 | 172.237.142.80 | 172.237.142.81 | 172.237.142.86 | 172.237.142.87 | 6 |
| 12 | 172.237.142.88/29 | 172.237.142.88 | 172.237.142.89 | 172.237.142.94 | 172.237.142.95 | 6 |
| 13 | 172.237.142.96/29 | 172.237.142.96 | 172.237.142.97 | 172.237.142.102 | 172.237.142.103 | 6 |
| 14 | 172.237.142.104/29 | 172.237.142.104 | 172.237.142.105 | 172.237.142.110 | 172.237.142.111 | 6 |
| 15 | 172.237.142.112/29 | 172.237.142.112 | 172.237.142.113 | 172.237.142.118 | 172.237.142.119 | 6 |
| 16 | 172.237.142.120/29 | 172.237.142.120 | 172.237.142.121 | 172.237.142.126 | 172.237.142.127 | 6 |
IP Address Sample
Showing first 16 of 128 total IPs.