31.24.0.0/13
PublicClass A — /13 prefix — 524,286 usable hosts
Network address — the base address of the block (31.24.0.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 31.31.255.255 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 524,286 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 255.248.0.0 is the dotted-decimal equivalent of /13. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 31.24.0.0/13 |
| Network Address | 31.24.0.0 |
| Broadcast Address | 31.31.255.255 |
| Subnet Mask | 255.248.0.0 |
| Wildcard Mask | 0.7.255.255 |
| Prefix Length | /13 |
| IP Address Class | Class A |
| Total IP Addresses | 524,288 |
| Usable Host Addresses | 524,286 |
| First Usable IP | 31.24.0.1 |
| Last Usable IP | 31.31.255.254 |
| Network (Hex) | 0x1F180000 |
| Broadcast (Hex) | 0x1F1FFFFF |
| Address Type | Public / Globally Routable |
Binary Representation
The first 13 bits (1s in the mask) identify the network. The remaining 19 bits identify hosts within the network.
Split into Equal Subnets
Split 31.24.0.0/13 into 2 equal /14 subnets (262,142 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 31.24.0.0/14 | 31.24.0.0 | 31.24.0.1 | 31.27.255.254 | 31.27.255.255 | 262,142 |
| 2 | 31.28.0.0/14 | 31.28.0.0 | 31.28.0.1 | 31.31.255.254 | 31.31.255.255 | 262,142 |
Split 31.24.0.0/13 into 4 equal /15 subnets (131,070 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 31.24.0.0/15 | 31.24.0.0 | 31.24.0.1 | 31.25.255.254 | 31.25.255.255 | 131,070 |
| 2 | 31.26.0.0/15 | 31.26.0.0 | 31.26.0.1 | 31.27.255.254 | 31.27.255.255 | 131,070 |
| 3 | 31.28.0.0/15 | 31.28.0.0 | 31.28.0.1 | 31.29.255.254 | 31.29.255.255 | 131,070 |
| 4 | 31.30.0.0/15 | 31.30.0.0 | 31.30.0.1 | 31.31.255.254 | 31.31.255.255 | 131,070 |
Split 31.24.0.0/13 into 8 equal /16 subnets (65,534 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 31.24.0.0/16 | 31.24.0.0 | 31.24.0.1 | 31.24.255.254 | 31.24.255.255 | 65,534 |
| 2 | 31.25.0.0/16 | 31.25.0.0 | 31.25.0.1 | 31.25.255.254 | 31.25.255.255 | 65,534 |
| 3 | 31.26.0.0/16 | 31.26.0.0 | 31.26.0.1 | 31.26.255.254 | 31.26.255.255 | 65,534 |
| 4 | 31.27.0.0/16 | 31.27.0.0 | 31.27.0.1 | 31.27.255.254 | 31.27.255.255 | 65,534 |
| 5 | 31.28.0.0/16 | 31.28.0.0 | 31.28.0.1 | 31.28.255.254 | 31.28.255.255 | 65,534 |
| 6 | 31.29.0.0/16 | 31.29.0.0 | 31.29.0.1 | 31.29.255.254 | 31.29.255.255 | 65,534 |
| 7 | 31.30.0.0/16 | 31.30.0.0 | 31.30.0.1 | 31.30.255.254 | 31.30.255.255 | 65,534 |
| 8 | 31.31.0.0/16 | 31.31.0.0 | 31.31.0.1 | 31.31.255.254 | 31.31.255.255 | 65,534 |
Split 31.24.0.0/13 into 16 equal /17 subnets (32,766 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 31.24.0.0/17 | 31.24.0.0 | 31.24.0.1 | 31.24.127.254 | 31.24.127.255 | 32,766 |
| 2 | 31.24.128.0/17 | 31.24.128.0 | 31.24.128.1 | 31.24.255.254 | 31.24.255.255 | 32,766 |
| 3 | 31.25.0.0/17 | 31.25.0.0 | 31.25.0.1 | 31.25.127.254 | 31.25.127.255 | 32,766 |
| 4 | 31.25.128.0/17 | 31.25.128.0 | 31.25.128.1 | 31.25.255.254 | 31.25.255.255 | 32,766 |
| 5 | 31.26.0.0/17 | 31.26.0.0 | 31.26.0.1 | 31.26.127.254 | 31.26.127.255 | 32,766 |
| 6 | 31.26.128.0/17 | 31.26.128.0 | 31.26.128.1 | 31.26.255.254 | 31.26.255.255 | 32,766 |
| 7 | 31.27.0.0/17 | 31.27.0.0 | 31.27.0.1 | 31.27.127.254 | 31.27.127.255 | 32,766 |
| 8 | 31.27.128.0/17 | 31.27.128.0 | 31.27.128.1 | 31.27.255.254 | 31.27.255.255 | 32,766 |
| 9 | 31.28.0.0/17 | 31.28.0.0 | 31.28.0.1 | 31.28.127.254 | 31.28.127.255 | 32,766 |
| 10 | 31.28.128.0/17 | 31.28.128.0 | 31.28.128.1 | 31.28.255.254 | 31.28.255.255 | 32,766 |
| 11 | 31.29.0.0/17 | 31.29.0.0 | 31.29.0.1 | 31.29.127.254 | 31.29.127.255 | 32,766 |
| 12 | 31.29.128.0/17 | 31.29.128.0 | 31.29.128.1 | 31.29.255.254 | 31.29.255.255 | 32,766 |
| 13 | 31.30.0.0/17 | 31.30.0.0 | 31.30.0.1 | 31.30.127.254 | 31.30.127.255 | 32,766 |
| 14 | 31.30.128.0/17 | 31.30.128.0 | 31.30.128.1 | 31.30.255.254 | 31.30.255.255 | 32,766 |
| 15 | 31.31.0.0/17 | 31.31.0.0 | 31.31.0.1 | 31.31.127.254 | 31.31.127.255 | 32,766 |
| 16 | 31.31.128.0/17 | 31.31.128.0 | 31.31.128.1 | 31.31.255.254 | 31.31.255.255 | 32,766 |