91.38.237.128/25
PublicClass A — /25 prefix — 126 usable hosts
Network address — the base address of the block (91.38.237.128). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 91.38.237.255 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 | 91.38.237.128/25 |
| Network Address | 91.38.237.128 |
| Broadcast Address | 91.38.237.255 |
| 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 | 91.38.237.129 |
| Last Usable IP | 91.38.237.254 |
| Network (Hex) | 0x5B26ED80 |
| Broadcast (Hex) | 0x5B26EDFF |
| 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 91.38.237.128/25 into 2 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 91.38.237.128/26 | 91.38.237.128 | 91.38.237.129 | 91.38.237.190 | 91.38.237.191 | 62 |
| 2 | 91.38.237.192/26 | 91.38.237.192 | 91.38.237.193 | 91.38.237.254 | 91.38.237.255 | 62 |
Split 91.38.237.128/25 into 4 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 91.38.237.128/27 | 91.38.237.128 | 91.38.237.129 | 91.38.237.158 | 91.38.237.159 | 30 |
| 2 | 91.38.237.160/27 | 91.38.237.160 | 91.38.237.161 | 91.38.237.190 | 91.38.237.191 | 30 |
| 3 | 91.38.237.192/27 | 91.38.237.192 | 91.38.237.193 | 91.38.237.222 | 91.38.237.223 | 30 |
| 4 | 91.38.237.224/27 | 91.38.237.224 | 91.38.237.225 | 91.38.237.254 | 91.38.237.255 | 30 |
Split 91.38.237.128/25 into 8 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 91.38.237.128/28 | 91.38.237.128 | 91.38.237.129 | 91.38.237.142 | 91.38.237.143 | 14 |
| 2 | 91.38.237.144/28 | 91.38.237.144 | 91.38.237.145 | 91.38.237.158 | 91.38.237.159 | 14 |
| 3 | 91.38.237.160/28 | 91.38.237.160 | 91.38.237.161 | 91.38.237.174 | 91.38.237.175 | 14 |
| 4 | 91.38.237.176/28 | 91.38.237.176 | 91.38.237.177 | 91.38.237.190 | 91.38.237.191 | 14 |
| 5 | 91.38.237.192/28 | 91.38.237.192 | 91.38.237.193 | 91.38.237.206 | 91.38.237.207 | 14 |
| 6 | 91.38.237.208/28 | 91.38.237.208 | 91.38.237.209 | 91.38.237.222 | 91.38.237.223 | 14 |
| 7 | 91.38.237.224/28 | 91.38.237.224 | 91.38.237.225 | 91.38.237.238 | 91.38.237.239 | 14 |
| 8 | 91.38.237.240/28 | 91.38.237.240 | 91.38.237.241 | 91.38.237.254 | 91.38.237.255 | 14 |
Split 91.38.237.128/25 into 16 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 91.38.237.128/29 | 91.38.237.128 | 91.38.237.129 | 91.38.237.134 | 91.38.237.135 | 6 |
| 2 | 91.38.237.136/29 | 91.38.237.136 | 91.38.237.137 | 91.38.237.142 | 91.38.237.143 | 6 |
| 3 | 91.38.237.144/29 | 91.38.237.144 | 91.38.237.145 | 91.38.237.150 | 91.38.237.151 | 6 |
| 4 | 91.38.237.152/29 | 91.38.237.152 | 91.38.237.153 | 91.38.237.158 | 91.38.237.159 | 6 |
| 5 | 91.38.237.160/29 | 91.38.237.160 | 91.38.237.161 | 91.38.237.166 | 91.38.237.167 | 6 |
| 6 | 91.38.237.168/29 | 91.38.237.168 | 91.38.237.169 | 91.38.237.174 | 91.38.237.175 | 6 |
| 7 | 91.38.237.176/29 | 91.38.237.176 | 91.38.237.177 | 91.38.237.182 | 91.38.237.183 | 6 |
| 8 | 91.38.237.184/29 | 91.38.237.184 | 91.38.237.185 | 91.38.237.190 | 91.38.237.191 | 6 |
| 9 | 91.38.237.192/29 | 91.38.237.192 | 91.38.237.193 | 91.38.237.198 | 91.38.237.199 | 6 |
| 10 | 91.38.237.200/29 | 91.38.237.200 | 91.38.237.201 | 91.38.237.206 | 91.38.237.207 | 6 |
| 11 | 91.38.237.208/29 | 91.38.237.208 | 91.38.237.209 | 91.38.237.214 | 91.38.237.215 | 6 |
| 12 | 91.38.237.216/29 | 91.38.237.216 | 91.38.237.217 | 91.38.237.222 | 91.38.237.223 | 6 |
| 13 | 91.38.237.224/29 | 91.38.237.224 | 91.38.237.225 | 91.38.237.230 | 91.38.237.231 | 6 |
| 14 | 91.38.237.232/29 | 91.38.237.232 | 91.38.237.233 | 91.38.237.238 | 91.38.237.239 | 6 |
| 15 | 91.38.237.240/29 | 91.38.237.240 | 91.38.237.241 | 91.38.237.246 | 91.38.237.247 | 6 |
| 16 | 91.38.237.248/29 | 91.38.237.248 | 91.38.237.249 | 91.38.237.254 | 91.38.237.255 | 6 |
IP Address Sample
Showing first 16 of 128 total IPs.