21.40.47.0/26
PublicClass A — /26 prefix — 62 usable hosts
Network address — the base address of the block (21.40.47.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 21.40.47.63 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 | 21.40.47.0/26 |
| Network Address | 21.40.47.0 |
| Broadcast Address | 21.40.47.63 |
| 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 | 21.40.47.1 |
| Last Usable IP | 21.40.47.62 |
| Network (Hex) | 0x15282F00 |
| Broadcast (Hex) | 0x15282F3F |
| 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 21.40.47.0/26 into 2 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 21.40.47.0/27 | 21.40.47.0 | 21.40.47.1 | 21.40.47.30 | 21.40.47.31 | 30 |
| 2 | 21.40.47.32/27 | 21.40.47.32 | 21.40.47.33 | 21.40.47.62 | 21.40.47.63 | 30 |
Split 21.40.47.0/26 into 4 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 21.40.47.0/28 | 21.40.47.0 | 21.40.47.1 | 21.40.47.14 | 21.40.47.15 | 14 |
| 2 | 21.40.47.16/28 | 21.40.47.16 | 21.40.47.17 | 21.40.47.30 | 21.40.47.31 | 14 |
| 3 | 21.40.47.32/28 | 21.40.47.32 | 21.40.47.33 | 21.40.47.46 | 21.40.47.47 | 14 |
| 4 | 21.40.47.48/28 | 21.40.47.48 | 21.40.47.49 | 21.40.47.62 | 21.40.47.63 | 14 |
Split 21.40.47.0/26 into 8 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 21.40.47.0/29 | 21.40.47.0 | 21.40.47.1 | 21.40.47.6 | 21.40.47.7 | 6 |
| 2 | 21.40.47.8/29 | 21.40.47.8 | 21.40.47.9 | 21.40.47.14 | 21.40.47.15 | 6 |
| 3 | 21.40.47.16/29 | 21.40.47.16 | 21.40.47.17 | 21.40.47.22 | 21.40.47.23 | 6 |
| 4 | 21.40.47.24/29 | 21.40.47.24 | 21.40.47.25 | 21.40.47.30 | 21.40.47.31 | 6 |
| 5 | 21.40.47.32/29 | 21.40.47.32 | 21.40.47.33 | 21.40.47.38 | 21.40.47.39 | 6 |
| 6 | 21.40.47.40/29 | 21.40.47.40 | 21.40.47.41 | 21.40.47.46 | 21.40.47.47 | 6 |
| 7 | 21.40.47.48/29 | 21.40.47.48 | 21.40.47.49 | 21.40.47.54 | 21.40.47.55 | 6 |
| 8 | 21.40.47.56/29 | 21.40.47.56 | 21.40.47.57 | 21.40.47.62 | 21.40.47.63 | 6 |
Split 21.40.47.0/26 into 16 equal /30 subnets (2 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 21.40.47.0/30 | 21.40.47.0 | 21.40.47.1 | 21.40.47.2 | 21.40.47.3 | 2 |
| 2 | 21.40.47.4/30 | 21.40.47.4 | 21.40.47.5 | 21.40.47.6 | 21.40.47.7 | 2 |
| 3 | 21.40.47.8/30 | 21.40.47.8 | 21.40.47.9 | 21.40.47.10 | 21.40.47.11 | 2 |
| 4 | 21.40.47.12/30 | 21.40.47.12 | 21.40.47.13 | 21.40.47.14 | 21.40.47.15 | 2 |
| 5 | 21.40.47.16/30 | 21.40.47.16 | 21.40.47.17 | 21.40.47.18 | 21.40.47.19 | 2 |
| 6 | 21.40.47.20/30 | 21.40.47.20 | 21.40.47.21 | 21.40.47.22 | 21.40.47.23 | 2 |
| 7 | 21.40.47.24/30 | 21.40.47.24 | 21.40.47.25 | 21.40.47.26 | 21.40.47.27 | 2 |
| 8 | 21.40.47.28/30 | 21.40.47.28 | 21.40.47.29 | 21.40.47.30 | 21.40.47.31 | 2 |
| 9 | 21.40.47.32/30 | 21.40.47.32 | 21.40.47.33 | 21.40.47.34 | 21.40.47.35 | 2 |
| 10 | 21.40.47.36/30 | 21.40.47.36 | 21.40.47.37 | 21.40.47.38 | 21.40.47.39 | 2 |
| 11 | 21.40.47.40/30 | 21.40.47.40 | 21.40.47.41 | 21.40.47.42 | 21.40.47.43 | 2 |
| 12 | 21.40.47.44/30 | 21.40.47.44 | 21.40.47.45 | 21.40.47.46 | 21.40.47.47 | 2 |
| 13 | 21.40.47.48/30 | 21.40.47.48 | 21.40.47.49 | 21.40.47.50 | 21.40.47.51 | 2 |
| 14 | 21.40.47.52/30 | 21.40.47.52 | 21.40.47.53 | 21.40.47.54 | 21.40.47.55 | 2 |
| 15 | 21.40.47.56/30 | 21.40.47.56 | 21.40.47.57 | 21.40.47.58 | 21.40.47.59 | 2 |
| 16 | 21.40.47.60/30 | 21.40.47.60 | 21.40.47.61 | 21.40.47.62 | 21.40.47.63 | 2 |
IP Address Sample
Showing first 16 of 64 total IPs.