238.140.64.0/20
Multicast RFC 5771Class D (Multicast) — /20 prefix — 4,094 usable hosts
Network address — the base address of the block (238.140.64.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 238.140.79.255 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 4,094 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 255.255.240.0 is the dotted-decimal equivalent of /20. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 238.140.64.0/20 |
| Network Address | 238.140.64.0 |
| Broadcast Address | 238.140.79.255 |
| Subnet Mask | 255.255.240.0 |
| Wildcard Mask | 0.0.15.255 |
| Prefix Length | /20 |
| IP Address Class | Class D (Multicast) |
| Total IP Addresses | 4,096 |
| Usable Host Addresses | 4,094 |
| First Usable IP | 238.140.64.1 |
| Last Usable IP | 238.140.79.254 |
| Network (Hex) | 0xEE8C4000 |
| Broadcast (Hex) | 0xEE8C4FFF |
| Governing RFC | RFC 5771 |
| Address Type | Multicast |
Binary Representation
The first 20 bits (1s in the mask) identify the network. The remaining 12 bits identify hosts within the network.
Split into Equal Subnets
Split 238.140.64.0/20 into 2 equal /21 subnets (2,046 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 238.140.64.0/21 | 238.140.64.0 | 238.140.64.1 | 238.140.71.254 | 238.140.71.255 | 2,046 |
| 2 | 238.140.72.0/21 | 238.140.72.0 | 238.140.72.1 | 238.140.79.254 | 238.140.79.255 | 2,046 |
Split 238.140.64.0/20 into 4 equal /22 subnets (1,022 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 238.140.64.0/22 | 238.140.64.0 | 238.140.64.1 | 238.140.67.254 | 238.140.67.255 | 1,022 |
| 2 | 238.140.68.0/22 | 238.140.68.0 | 238.140.68.1 | 238.140.71.254 | 238.140.71.255 | 1,022 |
| 3 | 238.140.72.0/22 | 238.140.72.0 | 238.140.72.1 | 238.140.75.254 | 238.140.75.255 | 1,022 |
| 4 | 238.140.76.0/22 | 238.140.76.0 | 238.140.76.1 | 238.140.79.254 | 238.140.79.255 | 1,022 |
Split 238.140.64.0/20 into 8 equal /23 subnets (510 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 238.140.64.0/23 | 238.140.64.0 | 238.140.64.1 | 238.140.65.254 | 238.140.65.255 | 510 |
| 2 | 238.140.66.0/23 | 238.140.66.0 | 238.140.66.1 | 238.140.67.254 | 238.140.67.255 | 510 |
| 3 | 238.140.68.0/23 | 238.140.68.0 | 238.140.68.1 | 238.140.69.254 | 238.140.69.255 | 510 |
| 4 | 238.140.70.0/23 | 238.140.70.0 | 238.140.70.1 | 238.140.71.254 | 238.140.71.255 | 510 |
| 5 | 238.140.72.0/23 | 238.140.72.0 | 238.140.72.1 | 238.140.73.254 | 238.140.73.255 | 510 |
| 6 | 238.140.74.0/23 | 238.140.74.0 | 238.140.74.1 | 238.140.75.254 | 238.140.75.255 | 510 |
| 7 | 238.140.76.0/23 | 238.140.76.0 | 238.140.76.1 | 238.140.77.254 | 238.140.77.255 | 510 |
| 8 | 238.140.78.0/23 | 238.140.78.0 | 238.140.78.1 | 238.140.79.254 | 238.140.79.255 | 510 |
Split 238.140.64.0/20 into 16 equal /24 subnets (254 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 238.140.64.0/24 | 238.140.64.0 | 238.140.64.1 | 238.140.64.254 | 238.140.64.255 | 254 |
| 2 | 238.140.65.0/24 | 238.140.65.0 | 238.140.65.1 | 238.140.65.254 | 238.140.65.255 | 254 |
| 3 | 238.140.66.0/24 | 238.140.66.0 | 238.140.66.1 | 238.140.66.254 | 238.140.66.255 | 254 |
| 4 | 238.140.67.0/24 | 238.140.67.0 | 238.140.67.1 | 238.140.67.254 | 238.140.67.255 | 254 |
| 5 | 238.140.68.0/24 | 238.140.68.0 | 238.140.68.1 | 238.140.68.254 | 238.140.68.255 | 254 |
| 6 | 238.140.69.0/24 | 238.140.69.0 | 238.140.69.1 | 238.140.69.254 | 238.140.69.255 | 254 |
| 7 | 238.140.70.0/24 | 238.140.70.0 | 238.140.70.1 | 238.140.70.254 | 238.140.70.255 | 254 |
| 8 | 238.140.71.0/24 | 238.140.71.0 | 238.140.71.1 | 238.140.71.254 | 238.140.71.255 | 254 |
| 9 | 238.140.72.0/24 | 238.140.72.0 | 238.140.72.1 | 238.140.72.254 | 238.140.72.255 | 254 |
| 10 | 238.140.73.0/24 | 238.140.73.0 | 238.140.73.1 | 238.140.73.254 | 238.140.73.255 | 254 |
| 11 | 238.140.74.0/24 | 238.140.74.0 | 238.140.74.1 | 238.140.74.254 | 238.140.74.255 | 254 |
| 12 | 238.140.75.0/24 | 238.140.75.0 | 238.140.75.1 | 238.140.75.254 | 238.140.75.255 | 254 |
| 13 | 238.140.76.0/24 | 238.140.76.0 | 238.140.76.1 | 238.140.76.254 | 238.140.76.255 | 254 |
| 14 | 238.140.77.0/24 | 238.140.77.0 | 238.140.77.1 | 238.140.77.254 | 238.140.77.255 | 254 |
| 15 | 238.140.78.0/24 | 238.140.78.0 | 238.140.78.1 | 238.140.78.254 | 238.140.78.255 | 254 |
| 16 | 238.140.79.0/24 | 238.140.79.0 | 238.140.79.1 | 238.140.79.254 | 238.140.79.255 | 254 |