231.5.192.0/20
Multicast RFC 5771Class D (Multicast) — /20 prefix — 4,094 usable hosts
Network address — the base address of the block (231.5.192.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 231.5.207.255 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 | 231.5.192.0/20 |
| Network Address | 231.5.192.0 |
| Broadcast Address | 231.5.207.255 |
| 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 | 231.5.192.1 |
| Last Usable IP | 231.5.207.254 |
| Network (Hex) | 0xE705C000 |
| Broadcast (Hex) | 0xE705CFFF |
| 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 231.5.192.0/20 into 2 equal /21 subnets (2,046 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 231.5.192.0/21 | 231.5.192.0 | 231.5.192.1 | 231.5.199.254 | 231.5.199.255 | 2,046 |
| 2 | 231.5.200.0/21 | 231.5.200.0 | 231.5.200.1 | 231.5.207.254 | 231.5.207.255 | 2,046 |
Split 231.5.192.0/20 into 4 equal /22 subnets (1,022 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 231.5.192.0/22 | 231.5.192.0 | 231.5.192.1 | 231.5.195.254 | 231.5.195.255 | 1,022 |
| 2 | 231.5.196.0/22 | 231.5.196.0 | 231.5.196.1 | 231.5.199.254 | 231.5.199.255 | 1,022 |
| 3 | 231.5.200.0/22 | 231.5.200.0 | 231.5.200.1 | 231.5.203.254 | 231.5.203.255 | 1,022 |
| 4 | 231.5.204.0/22 | 231.5.204.0 | 231.5.204.1 | 231.5.207.254 | 231.5.207.255 | 1,022 |
Split 231.5.192.0/20 into 8 equal /23 subnets (510 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 231.5.192.0/23 | 231.5.192.0 | 231.5.192.1 | 231.5.193.254 | 231.5.193.255 | 510 |
| 2 | 231.5.194.0/23 | 231.5.194.0 | 231.5.194.1 | 231.5.195.254 | 231.5.195.255 | 510 |
| 3 | 231.5.196.0/23 | 231.5.196.0 | 231.5.196.1 | 231.5.197.254 | 231.5.197.255 | 510 |
| 4 | 231.5.198.0/23 | 231.5.198.0 | 231.5.198.1 | 231.5.199.254 | 231.5.199.255 | 510 |
| 5 | 231.5.200.0/23 | 231.5.200.0 | 231.5.200.1 | 231.5.201.254 | 231.5.201.255 | 510 |
| 6 | 231.5.202.0/23 | 231.5.202.0 | 231.5.202.1 | 231.5.203.254 | 231.5.203.255 | 510 |
| 7 | 231.5.204.0/23 | 231.5.204.0 | 231.5.204.1 | 231.5.205.254 | 231.5.205.255 | 510 |
| 8 | 231.5.206.0/23 | 231.5.206.0 | 231.5.206.1 | 231.5.207.254 | 231.5.207.255 | 510 |
Split 231.5.192.0/20 into 16 equal /24 subnets (254 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 231.5.192.0/24 | 231.5.192.0 | 231.5.192.1 | 231.5.192.254 | 231.5.192.255 | 254 |
| 2 | 231.5.193.0/24 | 231.5.193.0 | 231.5.193.1 | 231.5.193.254 | 231.5.193.255 | 254 |
| 3 | 231.5.194.0/24 | 231.5.194.0 | 231.5.194.1 | 231.5.194.254 | 231.5.194.255 | 254 |
| 4 | 231.5.195.0/24 | 231.5.195.0 | 231.5.195.1 | 231.5.195.254 | 231.5.195.255 | 254 |
| 5 | 231.5.196.0/24 | 231.5.196.0 | 231.5.196.1 | 231.5.196.254 | 231.5.196.255 | 254 |
| 6 | 231.5.197.0/24 | 231.5.197.0 | 231.5.197.1 | 231.5.197.254 | 231.5.197.255 | 254 |
| 7 | 231.5.198.0/24 | 231.5.198.0 | 231.5.198.1 | 231.5.198.254 | 231.5.198.255 | 254 |
| 8 | 231.5.199.0/24 | 231.5.199.0 | 231.5.199.1 | 231.5.199.254 | 231.5.199.255 | 254 |
| 9 | 231.5.200.0/24 | 231.5.200.0 | 231.5.200.1 | 231.5.200.254 | 231.5.200.255 | 254 |
| 10 | 231.5.201.0/24 | 231.5.201.0 | 231.5.201.1 | 231.5.201.254 | 231.5.201.255 | 254 |
| 11 | 231.5.202.0/24 | 231.5.202.0 | 231.5.202.1 | 231.5.202.254 | 231.5.202.255 | 254 |
| 12 | 231.5.203.0/24 | 231.5.203.0 | 231.5.203.1 | 231.5.203.254 | 231.5.203.255 | 254 |
| 13 | 231.5.204.0/24 | 231.5.204.0 | 231.5.204.1 | 231.5.204.254 | 231.5.204.255 | 254 |
| 14 | 231.5.205.0/24 | 231.5.205.0 | 231.5.205.1 | 231.5.205.254 | 231.5.205.255 | 254 |
| 15 | 231.5.206.0/24 | 231.5.206.0 | 231.5.206.1 | 231.5.206.254 | 231.5.206.255 | 254 |
| 16 | 231.5.207.0/24 | 231.5.207.0 | 231.5.207.1 | 231.5.207.254 | 231.5.207.255 | 254 |