240.46.232.0/21
PublicClass E (Reserved) — /21 prefix — 2,046 usable hosts
Network address — the base address of the block (240.46.232.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 240.46.239.255 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 2,046 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 255.255.248.0 is the dotted-decimal equivalent of /21. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 240.46.232.0/21 |
| Network Address | 240.46.232.0 |
| Broadcast Address | 240.46.239.255 |
| Subnet Mask | 255.255.248.0 |
| Wildcard Mask | 0.0.7.255 |
| Prefix Length | /21 |
| IP Address Class | Class E (Reserved) |
| Total IP Addresses | 2,048 |
| Usable Host Addresses | 2,046 |
| First Usable IP | 240.46.232.1 |
| Last Usable IP | 240.46.239.254 |
| Network (Hex) | 0xF02EE800 |
| Broadcast (Hex) | 0xF02EEFFF |
| Address Type | Public / Globally Routable |
Binary Representation
The first 21 bits (1s in the mask) identify the network. The remaining 11 bits identify hosts within the network.
Split into Equal Subnets
Split 240.46.232.0/21 into 2 equal /22 subnets (1,022 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 240.46.232.0/22 | 240.46.232.0 | 240.46.232.1 | 240.46.235.254 | 240.46.235.255 | 1,022 |
| 2 | 240.46.236.0/22 | 240.46.236.0 | 240.46.236.1 | 240.46.239.254 | 240.46.239.255 | 1,022 |
Split 240.46.232.0/21 into 4 equal /23 subnets (510 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 240.46.232.0/23 | 240.46.232.0 | 240.46.232.1 | 240.46.233.254 | 240.46.233.255 | 510 |
| 2 | 240.46.234.0/23 | 240.46.234.0 | 240.46.234.1 | 240.46.235.254 | 240.46.235.255 | 510 |
| 3 | 240.46.236.0/23 | 240.46.236.0 | 240.46.236.1 | 240.46.237.254 | 240.46.237.255 | 510 |
| 4 | 240.46.238.0/23 | 240.46.238.0 | 240.46.238.1 | 240.46.239.254 | 240.46.239.255 | 510 |
Split 240.46.232.0/21 into 8 equal /24 subnets (254 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 240.46.232.0/24 | 240.46.232.0 | 240.46.232.1 | 240.46.232.254 | 240.46.232.255 | 254 |
| 2 | 240.46.233.0/24 | 240.46.233.0 | 240.46.233.1 | 240.46.233.254 | 240.46.233.255 | 254 |
| 3 | 240.46.234.0/24 | 240.46.234.0 | 240.46.234.1 | 240.46.234.254 | 240.46.234.255 | 254 |
| 4 | 240.46.235.0/24 | 240.46.235.0 | 240.46.235.1 | 240.46.235.254 | 240.46.235.255 | 254 |
| 5 | 240.46.236.0/24 | 240.46.236.0 | 240.46.236.1 | 240.46.236.254 | 240.46.236.255 | 254 |
| 6 | 240.46.237.0/24 | 240.46.237.0 | 240.46.237.1 | 240.46.237.254 | 240.46.237.255 | 254 |
| 7 | 240.46.238.0/24 | 240.46.238.0 | 240.46.238.1 | 240.46.238.254 | 240.46.238.255 | 254 |
| 8 | 240.46.239.0/24 | 240.46.239.0 | 240.46.239.1 | 240.46.239.254 | 240.46.239.255 | 254 |
Split 240.46.232.0/21 into 16 equal /25 subnets (126 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 240.46.232.0/25 | 240.46.232.0 | 240.46.232.1 | 240.46.232.126 | 240.46.232.127 | 126 |
| 2 | 240.46.232.128/25 | 240.46.232.128 | 240.46.232.129 | 240.46.232.254 | 240.46.232.255 | 126 |
| 3 | 240.46.233.0/25 | 240.46.233.0 | 240.46.233.1 | 240.46.233.126 | 240.46.233.127 | 126 |
| 4 | 240.46.233.128/25 | 240.46.233.128 | 240.46.233.129 | 240.46.233.254 | 240.46.233.255 | 126 |
| 5 | 240.46.234.0/25 | 240.46.234.0 | 240.46.234.1 | 240.46.234.126 | 240.46.234.127 | 126 |
| 6 | 240.46.234.128/25 | 240.46.234.128 | 240.46.234.129 | 240.46.234.254 | 240.46.234.255 | 126 |
| 7 | 240.46.235.0/25 | 240.46.235.0 | 240.46.235.1 | 240.46.235.126 | 240.46.235.127 | 126 |
| 8 | 240.46.235.128/25 | 240.46.235.128 | 240.46.235.129 | 240.46.235.254 | 240.46.235.255 | 126 |
| 9 | 240.46.236.0/25 | 240.46.236.0 | 240.46.236.1 | 240.46.236.126 | 240.46.236.127 | 126 |
| 10 | 240.46.236.128/25 | 240.46.236.128 | 240.46.236.129 | 240.46.236.254 | 240.46.236.255 | 126 |
| 11 | 240.46.237.0/25 | 240.46.237.0 | 240.46.237.1 | 240.46.237.126 | 240.46.237.127 | 126 |
| 12 | 240.46.237.128/25 | 240.46.237.128 | 240.46.237.129 | 240.46.237.254 | 240.46.237.255 | 126 |
| 13 | 240.46.238.0/25 | 240.46.238.0 | 240.46.238.1 | 240.46.238.126 | 240.46.238.127 | 126 |
| 14 | 240.46.238.128/25 | 240.46.238.128 | 240.46.238.129 | 240.46.238.254 | 240.46.238.255 | 126 |
| 15 | 240.46.239.0/25 | 240.46.239.0 | 240.46.239.1 | 240.46.239.126 | 240.46.239.127 | 126 |
| 16 | 240.46.239.128/25 | 240.46.239.128 | 240.46.239.129 | 240.46.239.254 | 240.46.239.255 | 126 |