31.248.108.128/25
PublicClass A — /25 prefix — 126 usable hosts
Network address — the base address of the block (31.248.108.128). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 31.248.108.255 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 126 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 255.255.255.128 is the dotted-decimal equivalent of /25. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 31.248.108.128/25 |
| Network Address | 31.248.108.128 |
| Broadcast Address | 31.248.108.255 |
| Subnet Mask | 255.255.255.128 |
| Wildcard Mask | 0.0.0.127 |
| Prefix Length | /25 |
| IP Address Class | Class A |
| Total IP Addresses | 128 |
| Usable Host Addresses | 126 |
| First Usable IP | 31.248.108.129 |
| Last Usable IP | 31.248.108.254 |
| Network (Hex) | 0x1FF86C80 |
| Broadcast (Hex) | 0x1FF86CFF |
| Address Type | Public / Globally Routable |
Binary Representation
The first 25 bits (1s in the mask) identify the network. The remaining 7 bits identify hosts within the network.
Split into Equal Subnets
Split 31.248.108.128/25 into 2 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 31.248.108.128/26 | 31.248.108.128 | 31.248.108.129 | 31.248.108.190 | 31.248.108.191 | 62 |
| 2 | 31.248.108.192/26 | 31.248.108.192 | 31.248.108.193 | 31.248.108.254 | 31.248.108.255 | 62 |
Split 31.248.108.128/25 into 4 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 31.248.108.128/27 | 31.248.108.128 | 31.248.108.129 | 31.248.108.158 | 31.248.108.159 | 30 |
| 2 | 31.248.108.160/27 | 31.248.108.160 | 31.248.108.161 | 31.248.108.190 | 31.248.108.191 | 30 |
| 3 | 31.248.108.192/27 | 31.248.108.192 | 31.248.108.193 | 31.248.108.222 | 31.248.108.223 | 30 |
| 4 | 31.248.108.224/27 | 31.248.108.224 | 31.248.108.225 | 31.248.108.254 | 31.248.108.255 | 30 |
Split 31.248.108.128/25 into 8 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 31.248.108.128/28 | 31.248.108.128 | 31.248.108.129 | 31.248.108.142 | 31.248.108.143 | 14 |
| 2 | 31.248.108.144/28 | 31.248.108.144 | 31.248.108.145 | 31.248.108.158 | 31.248.108.159 | 14 |
| 3 | 31.248.108.160/28 | 31.248.108.160 | 31.248.108.161 | 31.248.108.174 | 31.248.108.175 | 14 |
| 4 | 31.248.108.176/28 | 31.248.108.176 | 31.248.108.177 | 31.248.108.190 | 31.248.108.191 | 14 |
| 5 | 31.248.108.192/28 | 31.248.108.192 | 31.248.108.193 | 31.248.108.206 | 31.248.108.207 | 14 |
| 6 | 31.248.108.208/28 | 31.248.108.208 | 31.248.108.209 | 31.248.108.222 | 31.248.108.223 | 14 |
| 7 | 31.248.108.224/28 | 31.248.108.224 | 31.248.108.225 | 31.248.108.238 | 31.248.108.239 | 14 |
| 8 | 31.248.108.240/28 | 31.248.108.240 | 31.248.108.241 | 31.248.108.254 | 31.248.108.255 | 14 |
Split 31.248.108.128/25 into 16 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 31.248.108.128/29 | 31.248.108.128 | 31.248.108.129 | 31.248.108.134 | 31.248.108.135 | 6 |
| 2 | 31.248.108.136/29 | 31.248.108.136 | 31.248.108.137 | 31.248.108.142 | 31.248.108.143 | 6 |
| 3 | 31.248.108.144/29 | 31.248.108.144 | 31.248.108.145 | 31.248.108.150 | 31.248.108.151 | 6 |
| 4 | 31.248.108.152/29 | 31.248.108.152 | 31.248.108.153 | 31.248.108.158 | 31.248.108.159 | 6 |
| 5 | 31.248.108.160/29 | 31.248.108.160 | 31.248.108.161 | 31.248.108.166 | 31.248.108.167 | 6 |
| 6 | 31.248.108.168/29 | 31.248.108.168 | 31.248.108.169 | 31.248.108.174 | 31.248.108.175 | 6 |
| 7 | 31.248.108.176/29 | 31.248.108.176 | 31.248.108.177 | 31.248.108.182 | 31.248.108.183 | 6 |
| 8 | 31.248.108.184/29 | 31.248.108.184 | 31.248.108.185 | 31.248.108.190 | 31.248.108.191 | 6 |
| 9 | 31.248.108.192/29 | 31.248.108.192 | 31.248.108.193 | 31.248.108.198 | 31.248.108.199 | 6 |
| 10 | 31.248.108.200/29 | 31.248.108.200 | 31.248.108.201 | 31.248.108.206 | 31.248.108.207 | 6 |
| 11 | 31.248.108.208/29 | 31.248.108.208 | 31.248.108.209 | 31.248.108.214 | 31.248.108.215 | 6 |
| 12 | 31.248.108.216/29 | 31.248.108.216 | 31.248.108.217 | 31.248.108.222 | 31.248.108.223 | 6 |
| 13 | 31.248.108.224/29 | 31.248.108.224 | 31.248.108.225 | 31.248.108.230 | 31.248.108.231 | 6 |
| 14 | 31.248.108.232/29 | 31.248.108.232 | 31.248.108.233 | 31.248.108.238 | 31.248.108.239 | 6 |
| 15 | 31.248.108.240/29 | 31.248.108.240 | 31.248.108.241 | 31.248.108.246 | 31.248.108.247 | 6 |
| 16 | 31.248.108.248/29 | 31.248.108.248 | 31.248.108.249 | 31.248.108.254 | 31.248.108.255 | 6 |
IP Address Sample
Showing first 16 of 128 total IPs.