213.237.31.128/25
PublicClass C — /25 prefix — 126 usable hosts
Network address — the base address of the block (213.237.31.128). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 213.237.31.255 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 | 213.237.31.128/25 |
| Network Address | 213.237.31.128 |
| Broadcast Address | 213.237.31.255 |
| Subnet Mask | 255.255.255.128 |
| Wildcard Mask | 0.0.0.127 |
| Prefix Length | /25 |
| IP Address Class | Class C |
| Total IP Addresses | 128 |
| Usable Host Addresses | 126 |
| First Usable IP | 213.237.31.129 |
| Last Usable IP | 213.237.31.254 |
| Network (Hex) | 0xD5ED1F80 |
| Broadcast (Hex) | 0xD5ED1FFF |
| 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 213.237.31.128/25 into 2 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 213.237.31.128/26 | 213.237.31.128 | 213.237.31.129 | 213.237.31.190 | 213.237.31.191 | 62 |
| 2 | 213.237.31.192/26 | 213.237.31.192 | 213.237.31.193 | 213.237.31.254 | 213.237.31.255 | 62 |
Split 213.237.31.128/25 into 4 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 213.237.31.128/27 | 213.237.31.128 | 213.237.31.129 | 213.237.31.158 | 213.237.31.159 | 30 |
| 2 | 213.237.31.160/27 | 213.237.31.160 | 213.237.31.161 | 213.237.31.190 | 213.237.31.191 | 30 |
| 3 | 213.237.31.192/27 | 213.237.31.192 | 213.237.31.193 | 213.237.31.222 | 213.237.31.223 | 30 |
| 4 | 213.237.31.224/27 | 213.237.31.224 | 213.237.31.225 | 213.237.31.254 | 213.237.31.255 | 30 |
Split 213.237.31.128/25 into 8 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 213.237.31.128/28 | 213.237.31.128 | 213.237.31.129 | 213.237.31.142 | 213.237.31.143 | 14 |
| 2 | 213.237.31.144/28 | 213.237.31.144 | 213.237.31.145 | 213.237.31.158 | 213.237.31.159 | 14 |
| 3 | 213.237.31.160/28 | 213.237.31.160 | 213.237.31.161 | 213.237.31.174 | 213.237.31.175 | 14 |
| 4 | 213.237.31.176/28 | 213.237.31.176 | 213.237.31.177 | 213.237.31.190 | 213.237.31.191 | 14 |
| 5 | 213.237.31.192/28 | 213.237.31.192 | 213.237.31.193 | 213.237.31.206 | 213.237.31.207 | 14 |
| 6 | 213.237.31.208/28 | 213.237.31.208 | 213.237.31.209 | 213.237.31.222 | 213.237.31.223 | 14 |
| 7 | 213.237.31.224/28 | 213.237.31.224 | 213.237.31.225 | 213.237.31.238 | 213.237.31.239 | 14 |
| 8 | 213.237.31.240/28 | 213.237.31.240 | 213.237.31.241 | 213.237.31.254 | 213.237.31.255 | 14 |
Split 213.237.31.128/25 into 16 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 213.237.31.128/29 | 213.237.31.128 | 213.237.31.129 | 213.237.31.134 | 213.237.31.135 | 6 |
| 2 | 213.237.31.136/29 | 213.237.31.136 | 213.237.31.137 | 213.237.31.142 | 213.237.31.143 | 6 |
| 3 | 213.237.31.144/29 | 213.237.31.144 | 213.237.31.145 | 213.237.31.150 | 213.237.31.151 | 6 |
| 4 | 213.237.31.152/29 | 213.237.31.152 | 213.237.31.153 | 213.237.31.158 | 213.237.31.159 | 6 |
| 5 | 213.237.31.160/29 | 213.237.31.160 | 213.237.31.161 | 213.237.31.166 | 213.237.31.167 | 6 |
| 6 | 213.237.31.168/29 | 213.237.31.168 | 213.237.31.169 | 213.237.31.174 | 213.237.31.175 | 6 |
| 7 | 213.237.31.176/29 | 213.237.31.176 | 213.237.31.177 | 213.237.31.182 | 213.237.31.183 | 6 |
| 8 | 213.237.31.184/29 | 213.237.31.184 | 213.237.31.185 | 213.237.31.190 | 213.237.31.191 | 6 |
| 9 | 213.237.31.192/29 | 213.237.31.192 | 213.237.31.193 | 213.237.31.198 | 213.237.31.199 | 6 |
| 10 | 213.237.31.200/29 | 213.237.31.200 | 213.237.31.201 | 213.237.31.206 | 213.237.31.207 | 6 |
| 11 | 213.237.31.208/29 | 213.237.31.208 | 213.237.31.209 | 213.237.31.214 | 213.237.31.215 | 6 |
| 12 | 213.237.31.216/29 | 213.237.31.216 | 213.237.31.217 | 213.237.31.222 | 213.237.31.223 | 6 |
| 13 | 213.237.31.224/29 | 213.237.31.224 | 213.237.31.225 | 213.237.31.230 | 213.237.31.231 | 6 |
| 14 | 213.237.31.232/29 | 213.237.31.232 | 213.237.31.233 | 213.237.31.238 | 213.237.31.239 | 6 |
| 15 | 213.237.31.240/29 | 213.237.31.240 | 213.237.31.241 | 213.237.31.246 | 213.237.31.247 | 6 |
| 16 | 213.237.31.248/29 | 213.237.31.248 | 213.237.31.249 | 213.237.31.254 | 213.237.31.255 | 6 |
IP Address Sample
Showing first 16 of 128 total IPs.