16.12.17.0/25
PublicClass A — /25 prefix — 126 usable hosts
Network address — the base address of the block (16.12.17.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 16.12.17.127 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 | 16.12.17.0/25 |
| Network Address | 16.12.17.0 |
| Broadcast Address | 16.12.17.127 |
| 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 | 16.12.17.1 |
| Last Usable IP | 16.12.17.126 |
| Network (Hex) | 0x100C1100 |
| Broadcast (Hex) | 0x100C117F |
| 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 16.12.17.0/25 into 2 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 16.12.17.0/26 | 16.12.17.0 | 16.12.17.1 | 16.12.17.62 | 16.12.17.63 | 62 |
| 2 | 16.12.17.64/26 | 16.12.17.64 | 16.12.17.65 | 16.12.17.126 | 16.12.17.127 | 62 |
Split 16.12.17.0/25 into 4 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 16.12.17.0/27 | 16.12.17.0 | 16.12.17.1 | 16.12.17.30 | 16.12.17.31 | 30 |
| 2 | 16.12.17.32/27 | 16.12.17.32 | 16.12.17.33 | 16.12.17.62 | 16.12.17.63 | 30 |
| 3 | 16.12.17.64/27 | 16.12.17.64 | 16.12.17.65 | 16.12.17.94 | 16.12.17.95 | 30 |
| 4 | 16.12.17.96/27 | 16.12.17.96 | 16.12.17.97 | 16.12.17.126 | 16.12.17.127 | 30 |
Split 16.12.17.0/25 into 8 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 16.12.17.0/28 | 16.12.17.0 | 16.12.17.1 | 16.12.17.14 | 16.12.17.15 | 14 |
| 2 | 16.12.17.16/28 | 16.12.17.16 | 16.12.17.17 | 16.12.17.30 | 16.12.17.31 | 14 |
| 3 | 16.12.17.32/28 | 16.12.17.32 | 16.12.17.33 | 16.12.17.46 | 16.12.17.47 | 14 |
| 4 | 16.12.17.48/28 | 16.12.17.48 | 16.12.17.49 | 16.12.17.62 | 16.12.17.63 | 14 |
| 5 | 16.12.17.64/28 | 16.12.17.64 | 16.12.17.65 | 16.12.17.78 | 16.12.17.79 | 14 |
| 6 | 16.12.17.80/28 | 16.12.17.80 | 16.12.17.81 | 16.12.17.94 | 16.12.17.95 | 14 |
| 7 | 16.12.17.96/28 | 16.12.17.96 | 16.12.17.97 | 16.12.17.110 | 16.12.17.111 | 14 |
| 8 | 16.12.17.112/28 | 16.12.17.112 | 16.12.17.113 | 16.12.17.126 | 16.12.17.127 | 14 |
Split 16.12.17.0/25 into 16 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 16.12.17.0/29 | 16.12.17.0 | 16.12.17.1 | 16.12.17.6 | 16.12.17.7 | 6 |
| 2 | 16.12.17.8/29 | 16.12.17.8 | 16.12.17.9 | 16.12.17.14 | 16.12.17.15 | 6 |
| 3 | 16.12.17.16/29 | 16.12.17.16 | 16.12.17.17 | 16.12.17.22 | 16.12.17.23 | 6 |
| 4 | 16.12.17.24/29 | 16.12.17.24 | 16.12.17.25 | 16.12.17.30 | 16.12.17.31 | 6 |
| 5 | 16.12.17.32/29 | 16.12.17.32 | 16.12.17.33 | 16.12.17.38 | 16.12.17.39 | 6 |
| 6 | 16.12.17.40/29 | 16.12.17.40 | 16.12.17.41 | 16.12.17.46 | 16.12.17.47 | 6 |
| 7 | 16.12.17.48/29 | 16.12.17.48 | 16.12.17.49 | 16.12.17.54 | 16.12.17.55 | 6 |
| 8 | 16.12.17.56/29 | 16.12.17.56 | 16.12.17.57 | 16.12.17.62 | 16.12.17.63 | 6 |
| 9 | 16.12.17.64/29 | 16.12.17.64 | 16.12.17.65 | 16.12.17.70 | 16.12.17.71 | 6 |
| 10 | 16.12.17.72/29 | 16.12.17.72 | 16.12.17.73 | 16.12.17.78 | 16.12.17.79 | 6 |
| 11 | 16.12.17.80/29 | 16.12.17.80 | 16.12.17.81 | 16.12.17.86 | 16.12.17.87 | 6 |
| 12 | 16.12.17.88/29 | 16.12.17.88 | 16.12.17.89 | 16.12.17.94 | 16.12.17.95 | 6 |
| 13 | 16.12.17.96/29 | 16.12.17.96 | 16.12.17.97 | 16.12.17.102 | 16.12.17.103 | 6 |
| 14 | 16.12.17.104/29 | 16.12.17.104 | 16.12.17.105 | 16.12.17.110 | 16.12.17.111 | 6 |
| 15 | 16.12.17.112/29 | 16.12.17.112 | 16.12.17.113 | 16.12.17.118 | 16.12.17.119 | 6 |
| 16 | 16.12.17.120/29 | 16.12.17.120 | 16.12.17.121 | 16.12.17.126 | 16.12.17.127 | 6 |
IP Address Sample
Showing first 16 of 128 total IPs.