121.6.55.0/26
PublicClass A — /26 prefix — 62 usable hosts
Network address — the base address of the block (121.6.55.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 121.6.55.63 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 | 121.6.55.0/26 |
| Network Address | 121.6.55.0 |
| Broadcast Address | 121.6.55.63 |
| 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 | 121.6.55.1 |
| Last Usable IP | 121.6.55.62 |
| Network (Hex) | 0x79063700 |
| Broadcast (Hex) | 0x7906373F |
| 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 121.6.55.0/26 into 2 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 121.6.55.0/27 | 121.6.55.0 | 121.6.55.1 | 121.6.55.30 | 121.6.55.31 | 30 |
| 2 | 121.6.55.32/27 | 121.6.55.32 | 121.6.55.33 | 121.6.55.62 | 121.6.55.63 | 30 |
Split 121.6.55.0/26 into 4 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 121.6.55.0/28 | 121.6.55.0 | 121.6.55.1 | 121.6.55.14 | 121.6.55.15 | 14 |
| 2 | 121.6.55.16/28 | 121.6.55.16 | 121.6.55.17 | 121.6.55.30 | 121.6.55.31 | 14 |
| 3 | 121.6.55.32/28 | 121.6.55.32 | 121.6.55.33 | 121.6.55.46 | 121.6.55.47 | 14 |
| 4 | 121.6.55.48/28 | 121.6.55.48 | 121.6.55.49 | 121.6.55.62 | 121.6.55.63 | 14 |
Split 121.6.55.0/26 into 8 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 121.6.55.0/29 | 121.6.55.0 | 121.6.55.1 | 121.6.55.6 | 121.6.55.7 | 6 |
| 2 | 121.6.55.8/29 | 121.6.55.8 | 121.6.55.9 | 121.6.55.14 | 121.6.55.15 | 6 |
| 3 | 121.6.55.16/29 | 121.6.55.16 | 121.6.55.17 | 121.6.55.22 | 121.6.55.23 | 6 |
| 4 | 121.6.55.24/29 | 121.6.55.24 | 121.6.55.25 | 121.6.55.30 | 121.6.55.31 | 6 |
| 5 | 121.6.55.32/29 | 121.6.55.32 | 121.6.55.33 | 121.6.55.38 | 121.6.55.39 | 6 |
| 6 | 121.6.55.40/29 | 121.6.55.40 | 121.6.55.41 | 121.6.55.46 | 121.6.55.47 | 6 |
| 7 | 121.6.55.48/29 | 121.6.55.48 | 121.6.55.49 | 121.6.55.54 | 121.6.55.55 | 6 |
| 8 | 121.6.55.56/29 | 121.6.55.56 | 121.6.55.57 | 121.6.55.62 | 121.6.55.63 | 6 |
Split 121.6.55.0/26 into 16 equal /30 subnets (2 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 121.6.55.0/30 | 121.6.55.0 | 121.6.55.1 | 121.6.55.2 | 121.6.55.3 | 2 |
| 2 | 121.6.55.4/30 | 121.6.55.4 | 121.6.55.5 | 121.6.55.6 | 121.6.55.7 | 2 |
| 3 | 121.6.55.8/30 | 121.6.55.8 | 121.6.55.9 | 121.6.55.10 | 121.6.55.11 | 2 |
| 4 | 121.6.55.12/30 | 121.6.55.12 | 121.6.55.13 | 121.6.55.14 | 121.6.55.15 | 2 |
| 5 | 121.6.55.16/30 | 121.6.55.16 | 121.6.55.17 | 121.6.55.18 | 121.6.55.19 | 2 |
| 6 | 121.6.55.20/30 | 121.6.55.20 | 121.6.55.21 | 121.6.55.22 | 121.6.55.23 | 2 |
| 7 | 121.6.55.24/30 | 121.6.55.24 | 121.6.55.25 | 121.6.55.26 | 121.6.55.27 | 2 |
| 8 | 121.6.55.28/30 | 121.6.55.28 | 121.6.55.29 | 121.6.55.30 | 121.6.55.31 | 2 |
| 9 | 121.6.55.32/30 | 121.6.55.32 | 121.6.55.33 | 121.6.55.34 | 121.6.55.35 | 2 |
| 10 | 121.6.55.36/30 | 121.6.55.36 | 121.6.55.37 | 121.6.55.38 | 121.6.55.39 | 2 |
| 11 | 121.6.55.40/30 | 121.6.55.40 | 121.6.55.41 | 121.6.55.42 | 121.6.55.43 | 2 |
| 12 | 121.6.55.44/30 | 121.6.55.44 | 121.6.55.45 | 121.6.55.46 | 121.6.55.47 | 2 |
| 13 | 121.6.55.48/30 | 121.6.55.48 | 121.6.55.49 | 121.6.55.50 | 121.6.55.51 | 2 |
| 14 | 121.6.55.52/30 | 121.6.55.52 | 121.6.55.53 | 121.6.55.54 | 121.6.55.55 | 2 |
| 15 | 121.6.55.56/30 | 121.6.55.56 | 121.6.55.57 | 121.6.55.58 | 121.6.55.59 | 2 |
| 16 | 121.6.55.60/30 | 121.6.55.60 | 121.6.55.61 | 121.6.55.62 | 121.6.55.63 | 2 |
IP Address Sample
Showing first 16 of 64 total IPs.