203.66.31.0/25
PublicClass C — /25 prefix — 126 usable hosts
Network address — the base address of the block (203.66.31.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 203.66.31.127 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 | 203.66.31.0/25 |
| Network Address | 203.66.31.0 |
| Broadcast Address | 203.66.31.127 |
| Subnet Mask | 255.255.255.128 |
| Wildcard Mask | 0.0.0.127 |
| Prefix Length | /25 |
| IP Address Class | Class C |
| Total IP Addresses | 128 |
| Usable Host Addresses | 126 |
| First Usable IP | 203.66.31.1 |
| Last Usable IP | 203.66.31.126 |
| Network (Hex) | 0xCB421F00 |
| Broadcast (Hex) | 0xCB421F7F |
| 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 203.66.31.0/25 into 2 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 203.66.31.0/26 | 203.66.31.0 | 203.66.31.1 | 203.66.31.62 | 203.66.31.63 | 62 |
| 2 | 203.66.31.64/26 | 203.66.31.64 | 203.66.31.65 | 203.66.31.126 | 203.66.31.127 | 62 |
Split 203.66.31.0/25 into 4 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 203.66.31.0/27 | 203.66.31.0 | 203.66.31.1 | 203.66.31.30 | 203.66.31.31 | 30 |
| 2 | 203.66.31.32/27 | 203.66.31.32 | 203.66.31.33 | 203.66.31.62 | 203.66.31.63 | 30 |
| 3 | 203.66.31.64/27 | 203.66.31.64 | 203.66.31.65 | 203.66.31.94 | 203.66.31.95 | 30 |
| 4 | 203.66.31.96/27 | 203.66.31.96 | 203.66.31.97 | 203.66.31.126 | 203.66.31.127 | 30 |
Split 203.66.31.0/25 into 8 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 203.66.31.0/28 | 203.66.31.0 | 203.66.31.1 | 203.66.31.14 | 203.66.31.15 | 14 |
| 2 | 203.66.31.16/28 | 203.66.31.16 | 203.66.31.17 | 203.66.31.30 | 203.66.31.31 | 14 |
| 3 | 203.66.31.32/28 | 203.66.31.32 | 203.66.31.33 | 203.66.31.46 | 203.66.31.47 | 14 |
| 4 | 203.66.31.48/28 | 203.66.31.48 | 203.66.31.49 | 203.66.31.62 | 203.66.31.63 | 14 |
| 5 | 203.66.31.64/28 | 203.66.31.64 | 203.66.31.65 | 203.66.31.78 | 203.66.31.79 | 14 |
| 6 | 203.66.31.80/28 | 203.66.31.80 | 203.66.31.81 | 203.66.31.94 | 203.66.31.95 | 14 |
| 7 | 203.66.31.96/28 | 203.66.31.96 | 203.66.31.97 | 203.66.31.110 | 203.66.31.111 | 14 |
| 8 | 203.66.31.112/28 | 203.66.31.112 | 203.66.31.113 | 203.66.31.126 | 203.66.31.127 | 14 |
Split 203.66.31.0/25 into 16 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 203.66.31.0/29 | 203.66.31.0 | 203.66.31.1 | 203.66.31.6 | 203.66.31.7 | 6 |
| 2 | 203.66.31.8/29 | 203.66.31.8 | 203.66.31.9 | 203.66.31.14 | 203.66.31.15 | 6 |
| 3 | 203.66.31.16/29 | 203.66.31.16 | 203.66.31.17 | 203.66.31.22 | 203.66.31.23 | 6 |
| 4 | 203.66.31.24/29 | 203.66.31.24 | 203.66.31.25 | 203.66.31.30 | 203.66.31.31 | 6 |
| 5 | 203.66.31.32/29 | 203.66.31.32 | 203.66.31.33 | 203.66.31.38 | 203.66.31.39 | 6 |
| 6 | 203.66.31.40/29 | 203.66.31.40 | 203.66.31.41 | 203.66.31.46 | 203.66.31.47 | 6 |
| 7 | 203.66.31.48/29 | 203.66.31.48 | 203.66.31.49 | 203.66.31.54 | 203.66.31.55 | 6 |
| 8 | 203.66.31.56/29 | 203.66.31.56 | 203.66.31.57 | 203.66.31.62 | 203.66.31.63 | 6 |
| 9 | 203.66.31.64/29 | 203.66.31.64 | 203.66.31.65 | 203.66.31.70 | 203.66.31.71 | 6 |
| 10 | 203.66.31.72/29 | 203.66.31.72 | 203.66.31.73 | 203.66.31.78 | 203.66.31.79 | 6 |
| 11 | 203.66.31.80/29 | 203.66.31.80 | 203.66.31.81 | 203.66.31.86 | 203.66.31.87 | 6 |
| 12 | 203.66.31.88/29 | 203.66.31.88 | 203.66.31.89 | 203.66.31.94 | 203.66.31.95 | 6 |
| 13 | 203.66.31.96/29 | 203.66.31.96 | 203.66.31.97 | 203.66.31.102 | 203.66.31.103 | 6 |
| 14 | 203.66.31.104/29 | 203.66.31.104 | 203.66.31.105 | 203.66.31.110 | 203.66.31.111 | 6 |
| 15 | 203.66.31.112/29 | 203.66.31.112 | 203.66.31.113 | 203.66.31.118 | 203.66.31.119 | 6 |
| 16 | 203.66.31.120/29 | 203.66.31.120 | 203.66.31.121 | 203.66.31.126 | 203.66.31.127 | 6 |
IP Address Sample
Showing first 16 of 128 total IPs.