121.81.191.0/26
PublicClass A — /26 prefix — 62 usable hosts
Network address — the base address of the block (121.81.191.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 121.81.191.63 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 62 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 255.255.255.192 is the dotted-decimal equivalent of /26. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 121.81.191.0/26 |
| Network Address | 121.81.191.0 |
| Broadcast Address | 121.81.191.63 |
| Subnet Mask | 255.255.255.192 |
| Wildcard Mask | 0.0.0.63 |
| Prefix Length | /26 |
| IP Address Class | Class A |
| Total IP Addresses | 64 |
| Usable Host Addresses | 62 |
| First Usable IP | 121.81.191.1 |
| Last Usable IP | 121.81.191.62 |
| Network (Hex) | 0x7951BF00 |
| Broadcast (Hex) | 0x7951BF3F |
| Address Type | Public / Globally Routable |
Binary Representation
The first 26 bits (1s in the mask) identify the network. The remaining 6 bits identify hosts within the network.
Split into Equal Subnets
Split 121.81.191.0/26 into 2 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 121.81.191.0/27 | 121.81.191.0 | 121.81.191.1 | 121.81.191.30 | 121.81.191.31 | 30 |
| 2 | 121.81.191.32/27 | 121.81.191.32 | 121.81.191.33 | 121.81.191.62 | 121.81.191.63 | 30 |
Split 121.81.191.0/26 into 4 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 121.81.191.0/28 | 121.81.191.0 | 121.81.191.1 | 121.81.191.14 | 121.81.191.15 | 14 |
| 2 | 121.81.191.16/28 | 121.81.191.16 | 121.81.191.17 | 121.81.191.30 | 121.81.191.31 | 14 |
| 3 | 121.81.191.32/28 | 121.81.191.32 | 121.81.191.33 | 121.81.191.46 | 121.81.191.47 | 14 |
| 4 | 121.81.191.48/28 | 121.81.191.48 | 121.81.191.49 | 121.81.191.62 | 121.81.191.63 | 14 |
Split 121.81.191.0/26 into 8 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 121.81.191.0/29 | 121.81.191.0 | 121.81.191.1 | 121.81.191.6 | 121.81.191.7 | 6 |
| 2 | 121.81.191.8/29 | 121.81.191.8 | 121.81.191.9 | 121.81.191.14 | 121.81.191.15 | 6 |
| 3 | 121.81.191.16/29 | 121.81.191.16 | 121.81.191.17 | 121.81.191.22 | 121.81.191.23 | 6 |
| 4 | 121.81.191.24/29 | 121.81.191.24 | 121.81.191.25 | 121.81.191.30 | 121.81.191.31 | 6 |
| 5 | 121.81.191.32/29 | 121.81.191.32 | 121.81.191.33 | 121.81.191.38 | 121.81.191.39 | 6 |
| 6 | 121.81.191.40/29 | 121.81.191.40 | 121.81.191.41 | 121.81.191.46 | 121.81.191.47 | 6 |
| 7 | 121.81.191.48/29 | 121.81.191.48 | 121.81.191.49 | 121.81.191.54 | 121.81.191.55 | 6 |
| 8 | 121.81.191.56/29 | 121.81.191.56 | 121.81.191.57 | 121.81.191.62 | 121.81.191.63 | 6 |
Split 121.81.191.0/26 into 16 equal /30 subnets (2 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 121.81.191.0/30 | 121.81.191.0 | 121.81.191.1 | 121.81.191.2 | 121.81.191.3 | 2 |
| 2 | 121.81.191.4/30 | 121.81.191.4 | 121.81.191.5 | 121.81.191.6 | 121.81.191.7 | 2 |
| 3 | 121.81.191.8/30 | 121.81.191.8 | 121.81.191.9 | 121.81.191.10 | 121.81.191.11 | 2 |
| 4 | 121.81.191.12/30 | 121.81.191.12 | 121.81.191.13 | 121.81.191.14 | 121.81.191.15 | 2 |
| 5 | 121.81.191.16/30 | 121.81.191.16 | 121.81.191.17 | 121.81.191.18 | 121.81.191.19 | 2 |
| 6 | 121.81.191.20/30 | 121.81.191.20 | 121.81.191.21 | 121.81.191.22 | 121.81.191.23 | 2 |
| 7 | 121.81.191.24/30 | 121.81.191.24 | 121.81.191.25 | 121.81.191.26 | 121.81.191.27 | 2 |
| 8 | 121.81.191.28/30 | 121.81.191.28 | 121.81.191.29 | 121.81.191.30 | 121.81.191.31 | 2 |
| 9 | 121.81.191.32/30 | 121.81.191.32 | 121.81.191.33 | 121.81.191.34 | 121.81.191.35 | 2 |
| 10 | 121.81.191.36/30 | 121.81.191.36 | 121.81.191.37 | 121.81.191.38 | 121.81.191.39 | 2 |
| 11 | 121.81.191.40/30 | 121.81.191.40 | 121.81.191.41 | 121.81.191.42 | 121.81.191.43 | 2 |
| 12 | 121.81.191.44/30 | 121.81.191.44 | 121.81.191.45 | 121.81.191.46 | 121.81.191.47 | 2 |
| 13 | 121.81.191.48/30 | 121.81.191.48 | 121.81.191.49 | 121.81.191.50 | 121.81.191.51 | 2 |
| 14 | 121.81.191.52/30 | 121.81.191.52 | 121.81.191.53 | 121.81.191.54 | 121.81.191.55 | 2 |
| 15 | 121.81.191.56/30 | 121.81.191.56 | 121.81.191.57 | 121.81.191.58 | 121.81.191.59 | 2 |
| 16 | 121.81.191.60/30 | 121.81.191.60 | 121.81.191.61 | 121.81.191.62 | 121.81.191.63 | 2 |
IP Address Sample
Showing first 16 of 64 total IPs.