31.31.51.0/24
PublicClass A — /24 prefix — 254 usable hosts
Network address — the base address of the block (31.31.51.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 31.31.51.255 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 254 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 255.255.255.0 is the dotted-decimal equivalent of /24. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 31.31.51.0/24 |
| Network Address | 31.31.51.0 |
| Broadcast Address | 31.31.51.255 |
| Subnet Mask | 255.255.255.0 |
| Wildcard Mask | 0.0.0.255 |
| Prefix Length | /24 |
| IP Address Class | Class A |
| Total IP Addresses | 256 |
| Usable Host Addresses | 254 |
| First Usable IP | 31.31.51.1 |
| Last Usable IP | 31.31.51.254 |
| Network (Hex) | 0x1F1F3300 |
| Broadcast (Hex) | 0x1F1F33FF |
| Address Type | Public / Globally Routable |
Binary Representation
The first 24 bits (1s in the mask) identify the network. The remaining 8 bits identify hosts within the network.
Split into Equal Subnets
Split 31.31.51.0/24 into 2 equal /25 subnets (126 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 31.31.51.0/25 | 31.31.51.0 | 31.31.51.1 | 31.31.51.126 | 31.31.51.127 | 126 |
| 2 | 31.31.51.128/25 | 31.31.51.128 | 31.31.51.129 | 31.31.51.254 | 31.31.51.255 | 126 |
Split 31.31.51.0/24 into 4 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 31.31.51.0/26 | 31.31.51.0 | 31.31.51.1 | 31.31.51.62 | 31.31.51.63 | 62 |
| 2 | 31.31.51.64/26 | 31.31.51.64 | 31.31.51.65 | 31.31.51.126 | 31.31.51.127 | 62 |
| 3 | 31.31.51.128/26 | 31.31.51.128 | 31.31.51.129 | 31.31.51.190 | 31.31.51.191 | 62 |
| 4 | 31.31.51.192/26 | 31.31.51.192 | 31.31.51.193 | 31.31.51.254 | 31.31.51.255 | 62 |
Split 31.31.51.0/24 into 8 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 31.31.51.0/27 | 31.31.51.0 | 31.31.51.1 | 31.31.51.30 | 31.31.51.31 | 30 |
| 2 | 31.31.51.32/27 | 31.31.51.32 | 31.31.51.33 | 31.31.51.62 | 31.31.51.63 | 30 |
| 3 | 31.31.51.64/27 | 31.31.51.64 | 31.31.51.65 | 31.31.51.94 | 31.31.51.95 | 30 |
| 4 | 31.31.51.96/27 | 31.31.51.96 | 31.31.51.97 | 31.31.51.126 | 31.31.51.127 | 30 |
| 5 | 31.31.51.128/27 | 31.31.51.128 | 31.31.51.129 | 31.31.51.158 | 31.31.51.159 | 30 |
| 6 | 31.31.51.160/27 | 31.31.51.160 | 31.31.51.161 | 31.31.51.190 | 31.31.51.191 | 30 |
| 7 | 31.31.51.192/27 | 31.31.51.192 | 31.31.51.193 | 31.31.51.222 | 31.31.51.223 | 30 |
| 8 | 31.31.51.224/27 | 31.31.51.224 | 31.31.51.225 | 31.31.51.254 | 31.31.51.255 | 30 |
Split 31.31.51.0/24 into 16 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 31.31.51.0/28 | 31.31.51.0 | 31.31.51.1 | 31.31.51.14 | 31.31.51.15 | 14 |
| 2 | 31.31.51.16/28 | 31.31.51.16 | 31.31.51.17 | 31.31.51.30 | 31.31.51.31 | 14 |
| 3 | 31.31.51.32/28 | 31.31.51.32 | 31.31.51.33 | 31.31.51.46 | 31.31.51.47 | 14 |
| 4 | 31.31.51.48/28 | 31.31.51.48 | 31.31.51.49 | 31.31.51.62 | 31.31.51.63 | 14 |
| 5 | 31.31.51.64/28 | 31.31.51.64 | 31.31.51.65 | 31.31.51.78 | 31.31.51.79 | 14 |
| 6 | 31.31.51.80/28 | 31.31.51.80 | 31.31.51.81 | 31.31.51.94 | 31.31.51.95 | 14 |
| 7 | 31.31.51.96/28 | 31.31.51.96 | 31.31.51.97 | 31.31.51.110 | 31.31.51.111 | 14 |
| 8 | 31.31.51.112/28 | 31.31.51.112 | 31.31.51.113 | 31.31.51.126 | 31.31.51.127 | 14 |
| 9 | 31.31.51.128/28 | 31.31.51.128 | 31.31.51.129 | 31.31.51.142 | 31.31.51.143 | 14 |
| 10 | 31.31.51.144/28 | 31.31.51.144 | 31.31.51.145 | 31.31.51.158 | 31.31.51.159 | 14 |
| 11 | 31.31.51.160/28 | 31.31.51.160 | 31.31.51.161 | 31.31.51.174 | 31.31.51.175 | 14 |
| 12 | 31.31.51.176/28 | 31.31.51.176 | 31.31.51.177 | 31.31.51.190 | 31.31.51.191 | 14 |
| 13 | 31.31.51.192/28 | 31.31.51.192 | 31.31.51.193 | 31.31.51.206 | 31.31.51.207 | 14 |
| 14 | 31.31.51.208/28 | 31.31.51.208 | 31.31.51.209 | 31.31.51.222 | 31.31.51.223 | 14 |
| 15 | 31.31.51.224/28 | 31.31.51.224 | 31.31.51.225 | 31.31.51.238 | 31.31.51.239 | 14 |
| 16 | 31.31.51.240/28 | 31.31.51.240 | 31.31.51.241 | 31.31.51.254 | 31.31.51.255 | 14 |
IP Address Sample
Showing first 16 of 256 total IPs.