121.6.47.0/25
PublicClass A — /25 prefix — 126 usable hosts
Network address — the base address of the block (121.6.47.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 121.6.47.127 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 | 121.6.47.0/25 |
| Network Address | 121.6.47.0 |
| Broadcast Address | 121.6.47.127 |
| 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 | 121.6.47.1 |
| Last Usable IP | 121.6.47.126 |
| Network (Hex) | 0x79062F00 |
| Broadcast (Hex) | 0x79062F7F |
| 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 121.6.47.0/25 into 2 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 121.6.47.0/26 | 121.6.47.0 | 121.6.47.1 | 121.6.47.62 | 121.6.47.63 | 62 |
| 2 | 121.6.47.64/26 | 121.6.47.64 | 121.6.47.65 | 121.6.47.126 | 121.6.47.127 | 62 |
Split 121.6.47.0/25 into 4 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 121.6.47.0/27 | 121.6.47.0 | 121.6.47.1 | 121.6.47.30 | 121.6.47.31 | 30 |
| 2 | 121.6.47.32/27 | 121.6.47.32 | 121.6.47.33 | 121.6.47.62 | 121.6.47.63 | 30 |
| 3 | 121.6.47.64/27 | 121.6.47.64 | 121.6.47.65 | 121.6.47.94 | 121.6.47.95 | 30 |
| 4 | 121.6.47.96/27 | 121.6.47.96 | 121.6.47.97 | 121.6.47.126 | 121.6.47.127 | 30 |
Split 121.6.47.0/25 into 8 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 121.6.47.0/28 | 121.6.47.0 | 121.6.47.1 | 121.6.47.14 | 121.6.47.15 | 14 |
| 2 | 121.6.47.16/28 | 121.6.47.16 | 121.6.47.17 | 121.6.47.30 | 121.6.47.31 | 14 |
| 3 | 121.6.47.32/28 | 121.6.47.32 | 121.6.47.33 | 121.6.47.46 | 121.6.47.47 | 14 |
| 4 | 121.6.47.48/28 | 121.6.47.48 | 121.6.47.49 | 121.6.47.62 | 121.6.47.63 | 14 |
| 5 | 121.6.47.64/28 | 121.6.47.64 | 121.6.47.65 | 121.6.47.78 | 121.6.47.79 | 14 |
| 6 | 121.6.47.80/28 | 121.6.47.80 | 121.6.47.81 | 121.6.47.94 | 121.6.47.95 | 14 |
| 7 | 121.6.47.96/28 | 121.6.47.96 | 121.6.47.97 | 121.6.47.110 | 121.6.47.111 | 14 |
| 8 | 121.6.47.112/28 | 121.6.47.112 | 121.6.47.113 | 121.6.47.126 | 121.6.47.127 | 14 |
Split 121.6.47.0/25 into 16 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 121.6.47.0/29 | 121.6.47.0 | 121.6.47.1 | 121.6.47.6 | 121.6.47.7 | 6 |
| 2 | 121.6.47.8/29 | 121.6.47.8 | 121.6.47.9 | 121.6.47.14 | 121.6.47.15 | 6 |
| 3 | 121.6.47.16/29 | 121.6.47.16 | 121.6.47.17 | 121.6.47.22 | 121.6.47.23 | 6 |
| 4 | 121.6.47.24/29 | 121.6.47.24 | 121.6.47.25 | 121.6.47.30 | 121.6.47.31 | 6 |
| 5 | 121.6.47.32/29 | 121.6.47.32 | 121.6.47.33 | 121.6.47.38 | 121.6.47.39 | 6 |
| 6 | 121.6.47.40/29 | 121.6.47.40 | 121.6.47.41 | 121.6.47.46 | 121.6.47.47 | 6 |
| 7 | 121.6.47.48/29 | 121.6.47.48 | 121.6.47.49 | 121.6.47.54 | 121.6.47.55 | 6 |
| 8 | 121.6.47.56/29 | 121.6.47.56 | 121.6.47.57 | 121.6.47.62 | 121.6.47.63 | 6 |
| 9 | 121.6.47.64/29 | 121.6.47.64 | 121.6.47.65 | 121.6.47.70 | 121.6.47.71 | 6 |
| 10 | 121.6.47.72/29 | 121.6.47.72 | 121.6.47.73 | 121.6.47.78 | 121.6.47.79 | 6 |
| 11 | 121.6.47.80/29 | 121.6.47.80 | 121.6.47.81 | 121.6.47.86 | 121.6.47.87 | 6 |
| 12 | 121.6.47.88/29 | 121.6.47.88 | 121.6.47.89 | 121.6.47.94 | 121.6.47.95 | 6 |
| 13 | 121.6.47.96/29 | 121.6.47.96 | 121.6.47.97 | 121.6.47.102 | 121.6.47.103 | 6 |
| 14 | 121.6.47.104/29 | 121.6.47.104 | 121.6.47.105 | 121.6.47.110 | 121.6.47.111 | 6 |
| 15 | 121.6.47.112/29 | 121.6.47.112 | 121.6.47.113 | 121.6.47.118 | 121.6.47.119 | 6 |
| 16 | 121.6.47.120/29 | 121.6.47.120 | 121.6.47.121 | 121.6.47.126 | 121.6.47.127 | 6 |
IP Address Sample
Showing first 16 of 128 total IPs.