30.8.161.0/25
PublicClass A — /25 prefix — 126 usable hosts
Network address — the base address of the block (30.8.161.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 30.8.161.127 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 | 30.8.161.0/25 |
| Network Address | 30.8.161.0 |
| Broadcast Address | 30.8.161.127 |
| 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 | 30.8.161.1 |
| Last Usable IP | 30.8.161.126 |
| Network (Hex) | 0x1E08A100 |
| Broadcast (Hex) | 0x1E08A17F |
| 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 30.8.161.0/25 into 2 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 30.8.161.0/26 | 30.8.161.0 | 30.8.161.1 | 30.8.161.62 | 30.8.161.63 | 62 |
| 2 | 30.8.161.64/26 | 30.8.161.64 | 30.8.161.65 | 30.8.161.126 | 30.8.161.127 | 62 |
Split 30.8.161.0/25 into 4 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 30.8.161.0/27 | 30.8.161.0 | 30.8.161.1 | 30.8.161.30 | 30.8.161.31 | 30 |
| 2 | 30.8.161.32/27 | 30.8.161.32 | 30.8.161.33 | 30.8.161.62 | 30.8.161.63 | 30 |
| 3 | 30.8.161.64/27 | 30.8.161.64 | 30.8.161.65 | 30.8.161.94 | 30.8.161.95 | 30 |
| 4 | 30.8.161.96/27 | 30.8.161.96 | 30.8.161.97 | 30.8.161.126 | 30.8.161.127 | 30 |
Split 30.8.161.0/25 into 8 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 30.8.161.0/28 | 30.8.161.0 | 30.8.161.1 | 30.8.161.14 | 30.8.161.15 | 14 |
| 2 | 30.8.161.16/28 | 30.8.161.16 | 30.8.161.17 | 30.8.161.30 | 30.8.161.31 | 14 |
| 3 | 30.8.161.32/28 | 30.8.161.32 | 30.8.161.33 | 30.8.161.46 | 30.8.161.47 | 14 |
| 4 | 30.8.161.48/28 | 30.8.161.48 | 30.8.161.49 | 30.8.161.62 | 30.8.161.63 | 14 |
| 5 | 30.8.161.64/28 | 30.8.161.64 | 30.8.161.65 | 30.8.161.78 | 30.8.161.79 | 14 |
| 6 | 30.8.161.80/28 | 30.8.161.80 | 30.8.161.81 | 30.8.161.94 | 30.8.161.95 | 14 |
| 7 | 30.8.161.96/28 | 30.8.161.96 | 30.8.161.97 | 30.8.161.110 | 30.8.161.111 | 14 |
| 8 | 30.8.161.112/28 | 30.8.161.112 | 30.8.161.113 | 30.8.161.126 | 30.8.161.127 | 14 |
Split 30.8.161.0/25 into 16 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 30.8.161.0/29 | 30.8.161.0 | 30.8.161.1 | 30.8.161.6 | 30.8.161.7 | 6 |
| 2 | 30.8.161.8/29 | 30.8.161.8 | 30.8.161.9 | 30.8.161.14 | 30.8.161.15 | 6 |
| 3 | 30.8.161.16/29 | 30.8.161.16 | 30.8.161.17 | 30.8.161.22 | 30.8.161.23 | 6 |
| 4 | 30.8.161.24/29 | 30.8.161.24 | 30.8.161.25 | 30.8.161.30 | 30.8.161.31 | 6 |
| 5 | 30.8.161.32/29 | 30.8.161.32 | 30.8.161.33 | 30.8.161.38 | 30.8.161.39 | 6 |
| 6 | 30.8.161.40/29 | 30.8.161.40 | 30.8.161.41 | 30.8.161.46 | 30.8.161.47 | 6 |
| 7 | 30.8.161.48/29 | 30.8.161.48 | 30.8.161.49 | 30.8.161.54 | 30.8.161.55 | 6 |
| 8 | 30.8.161.56/29 | 30.8.161.56 | 30.8.161.57 | 30.8.161.62 | 30.8.161.63 | 6 |
| 9 | 30.8.161.64/29 | 30.8.161.64 | 30.8.161.65 | 30.8.161.70 | 30.8.161.71 | 6 |
| 10 | 30.8.161.72/29 | 30.8.161.72 | 30.8.161.73 | 30.8.161.78 | 30.8.161.79 | 6 |
| 11 | 30.8.161.80/29 | 30.8.161.80 | 30.8.161.81 | 30.8.161.86 | 30.8.161.87 | 6 |
| 12 | 30.8.161.88/29 | 30.8.161.88 | 30.8.161.89 | 30.8.161.94 | 30.8.161.95 | 6 |
| 13 | 30.8.161.96/29 | 30.8.161.96 | 30.8.161.97 | 30.8.161.102 | 30.8.161.103 | 6 |
| 14 | 30.8.161.104/29 | 30.8.161.104 | 30.8.161.105 | 30.8.161.110 | 30.8.161.111 | 6 |
| 15 | 30.8.161.112/29 | 30.8.161.112 | 30.8.161.113 | 30.8.161.118 | 30.8.161.119 | 6 |
| 16 | 30.8.161.120/29 | 30.8.161.120 | 30.8.161.121 | 30.8.161.126 | 30.8.161.127 | 6 |
IP Address Sample
Showing first 16 of 128 total IPs.