56.129.96.0/20
PublicClass A — /20 prefix — 4,094 usable hosts
Network address — the base address of the block (56.129.96.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 56.129.111.255 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 | 56.129.96.0/20 |
| Network Address | 56.129.96.0 |
| Broadcast Address | 56.129.111.255 |
| Subnet Mask | 255.255.240.0 |
| Wildcard Mask | 0.0.15.255 |
| Prefix Length | /20 |
| IP Address Class | Class A |
| Total IP Addresses | 4,096 |
| Usable Host Addresses | 4,094 |
| First Usable IP | 56.129.96.1 |
| Last Usable IP | 56.129.111.254 |
| Network (Hex) | 0x38816000 |
| Broadcast (Hex) | 0x38816FFF |
| Address Type | Public / Globally Routable |
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 56.129.96.0/20 into 2 equal /21 subnets (2,046 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 56.129.96.0/21 | 56.129.96.0 | 56.129.96.1 | 56.129.103.254 | 56.129.103.255 | 2,046 |
| 2 | 56.129.104.0/21 | 56.129.104.0 | 56.129.104.1 | 56.129.111.254 | 56.129.111.255 | 2,046 |
Split 56.129.96.0/20 into 4 equal /22 subnets (1,022 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 56.129.96.0/22 | 56.129.96.0 | 56.129.96.1 | 56.129.99.254 | 56.129.99.255 | 1,022 |
| 2 | 56.129.100.0/22 | 56.129.100.0 | 56.129.100.1 | 56.129.103.254 | 56.129.103.255 | 1,022 |
| 3 | 56.129.104.0/22 | 56.129.104.0 | 56.129.104.1 | 56.129.107.254 | 56.129.107.255 | 1,022 |
| 4 | 56.129.108.0/22 | 56.129.108.0 | 56.129.108.1 | 56.129.111.254 | 56.129.111.255 | 1,022 |
Split 56.129.96.0/20 into 8 equal /23 subnets (510 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 56.129.96.0/23 | 56.129.96.0 | 56.129.96.1 | 56.129.97.254 | 56.129.97.255 | 510 |
| 2 | 56.129.98.0/23 | 56.129.98.0 | 56.129.98.1 | 56.129.99.254 | 56.129.99.255 | 510 |
| 3 | 56.129.100.0/23 | 56.129.100.0 | 56.129.100.1 | 56.129.101.254 | 56.129.101.255 | 510 |
| 4 | 56.129.102.0/23 | 56.129.102.0 | 56.129.102.1 | 56.129.103.254 | 56.129.103.255 | 510 |
| 5 | 56.129.104.0/23 | 56.129.104.0 | 56.129.104.1 | 56.129.105.254 | 56.129.105.255 | 510 |
| 6 | 56.129.106.0/23 | 56.129.106.0 | 56.129.106.1 | 56.129.107.254 | 56.129.107.255 | 510 |
| 7 | 56.129.108.0/23 | 56.129.108.0 | 56.129.108.1 | 56.129.109.254 | 56.129.109.255 | 510 |
| 8 | 56.129.110.0/23 | 56.129.110.0 | 56.129.110.1 | 56.129.111.254 | 56.129.111.255 | 510 |
Split 56.129.96.0/20 into 16 equal /24 subnets (254 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 56.129.96.0/24 | 56.129.96.0 | 56.129.96.1 | 56.129.96.254 | 56.129.96.255 | 254 |
| 2 | 56.129.97.0/24 | 56.129.97.0 | 56.129.97.1 | 56.129.97.254 | 56.129.97.255 | 254 |
| 3 | 56.129.98.0/24 | 56.129.98.0 | 56.129.98.1 | 56.129.98.254 | 56.129.98.255 | 254 |
| 4 | 56.129.99.0/24 | 56.129.99.0 | 56.129.99.1 | 56.129.99.254 | 56.129.99.255 | 254 |
| 5 | 56.129.100.0/24 | 56.129.100.0 | 56.129.100.1 | 56.129.100.254 | 56.129.100.255 | 254 |
| 6 | 56.129.101.0/24 | 56.129.101.0 | 56.129.101.1 | 56.129.101.254 | 56.129.101.255 | 254 |
| 7 | 56.129.102.0/24 | 56.129.102.0 | 56.129.102.1 | 56.129.102.254 | 56.129.102.255 | 254 |
| 8 | 56.129.103.0/24 | 56.129.103.0 | 56.129.103.1 | 56.129.103.254 | 56.129.103.255 | 254 |
| 9 | 56.129.104.0/24 | 56.129.104.0 | 56.129.104.1 | 56.129.104.254 | 56.129.104.255 | 254 |
| 10 | 56.129.105.0/24 | 56.129.105.0 | 56.129.105.1 | 56.129.105.254 | 56.129.105.255 | 254 |
| 11 | 56.129.106.0/24 | 56.129.106.0 | 56.129.106.1 | 56.129.106.254 | 56.129.106.255 | 254 |
| 12 | 56.129.107.0/24 | 56.129.107.0 | 56.129.107.1 | 56.129.107.254 | 56.129.107.255 | 254 |
| 13 | 56.129.108.0/24 | 56.129.108.0 | 56.129.108.1 | 56.129.108.254 | 56.129.108.255 | 254 |
| 14 | 56.129.109.0/24 | 56.129.109.0 | 56.129.109.1 | 56.129.109.254 | 56.129.109.255 | 254 |
| 15 | 56.129.110.0/24 | 56.129.110.0 | 56.129.110.1 | 56.129.110.254 | 56.129.110.255 | 254 |
| 16 | 56.129.111.0/24 | 56.129.111.0 | 56.129.111.1 | 56.129.111.254 | 56.129.111.255 | 254 |