100.77.111.0/25
PublicClass A — /25 prefix — 126 usable hosts
Network address — the base address of the block (100.77.111.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 100.77.111.127 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 | 100.77.111.0/25 |
| Network Address | 100.77.111.0 |
| Broadcast Address | 100.77.111.127 |
| 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 | 100.77.111.1 |
| Last Usable IP | 100.77.111.126 |
| Network (Hex) | 0x644D6F00 |
| Broadcast (Hex) | 0x644D6F7F |
| 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 100.77.111.0/25 into 2 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 100.77.111.0/26 | 100.77.111.0 | 100.77.111.1 | 100.77.111.62 | 100.77.111.63 | 62 |
| 2 | 100.77.111.64/26 | 100.77.111.64 | 100.77.111.65 | 100.77.111.126 | 100.77.111.127 | 62 |
Split 100.77.111.0/25 into 4 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 100.77.111.0/27 | 100.77.111.0 | 100.77.111.1 | 100.77.111.30 | 100.77.111.31 | 30 |
| 2 | 100.77.111.32/27 | 100.77.111.32 | 100.77.111.33 | 100.77.111.62 | 100.77.111.63 | 30 |
| 3 | 100.77.111.64/27 | 100.77.111.64 | 100.77.111.65 | 100.77.111.94 | 100.77.111.95 | 30 |
| 4 | 100.77.111.96/27 | 100.77.111.96 | 100.77.111.97 | 100.77.111.126 | 100.77.111.127 | 30 |
Split 100.77.111.0/25 into 8 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 100.77.111.0/28 | 100.77.111.0 | 100.77.111.1 | 100.77.111.14 | 100.77.111.15 | 14 |
| 2 | 100.77.111.16/28 | 100.77.111.16 | 100.77.111.17 | 100.77.111.30 | 100.77.111.31 | 14 |
| 3 | 100.77.111.32/28 | 100.77.111.32 | 100.77.111.33 | 100.77.111.46 | 100.77.111.47 | 14 |
| 4 | 100.77.111.48/28 | 100.77.111.48 | 100.77.111.49 | 100.77.111.62 | 100.77.111.63 | 14 |
| 5 | 100.77.111.64/28 | 100.77.111.64 | 100.77.111.65 | 100.77.111.78 | 100.77.111.79 | 14 |
| 6 | 100.77.111.80/28 | 100.77.111.80 | 100.77.111.81 | 100.77.111.94 | 100.77.111.95 | 14 |
| 7 | 100.77.111.96/28 | 100.77.111.96 | 100.77.111.97 | 100.77.111.110 | 100.77.111.111 | 14 |
| 8 | 100.77.111.112/28 | 100.77.111.112 | 100.77.111.113 | 100.77.111.126 | 100.77.111.127 | 14 |
Split 100.77.111.0/25 into 16 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 100.77.111.0/29 | 100.77.111.0 | 100.77.111.1 | 100.77.111.6 | 100.77.111.7 | 6 |
| 2 | 100.77.111.8/29 | 100.77.111.8 | 100.77.111.9 | 100.77.111.14 | 100.77.111.15 | 6 |
| 3 | 100.77.111.16/29 | 100.77.111.16 | 100.77.111.17 | 100.77.111.22 | 100.77.111.23 | 6 |
| 4 | 100.77.111.24/29 | 100.77.111.24 | 100.77.111.25 | 100.77.111.30 | 100.77.111.31 | 6 |
| 5 | 100.77.111.32/29 | 100.77.111.32 | 100.77.111.33 | 100.77.111.38 | 100.77.111.39 | 6 |
| 6 | 100.77.111.40/29 | 100.77.111.40 | 100.77.111.41 | 100.77.111.46 | 100.77.111.47 | 6 |
| 7 | 100.77.111.48/29 | 100.77.111.48 | 100.77.111.49 | 100.77.111.54 | 100.77.111.55 | 6 |
| 8 | 100.77.111.56/29 | 100.77.111.56 | 100.77.111.57 | 100.77.111.62 | 100.77.111.63 | 6 |
| 9 | 100.77.111.64/29 | 100.77.111.64 | 100.77.111.65 | 100.77.111.70 | 100.77.111.71 | 6 |
| 10 | 100.77.111.72/29 | 100.77.111.72 | 100.77.111.73 | 100.77.111.78 | 100.77.111.79 | 6 |
| 11 | 100.77.111.80/29 | 100.77.111.80 | 100.77.111.81 | 100.77.111.86 | 100.77.111.87 | 6 |
| 12 | 100.77.111.88/29 | 100.77.111.88 | 100.77.111.89 | 100.77.111.94 | 100.77.111.95 | 6 |
| 13 | 100.77.111.96/29 | 100.77.111.96 | 100.77.111.97 | 100.77.111.102 | 100.77.111.103 | 6 |
| 14 | 100.77.111.104/29 | 100.77.111.104 | 100.77.111.105 | 100.77.111.110 | 100.77.111.111 | 6 |
| 15 | 100.77.111.112/29 | 100.77.111.112 | 100.77.111.113 | 100.77.111.118 | 100.77.111.119 | 6 |
| 16 | 100.77.111.120/29 | 100.77.111.120 | 100.77.111.121 | 100.77.111.126 | 100.77.111.127 | 6 |
IP Address Sample
Showing first 16 of 128 total IPs.