151.4.73.128/25
PublicClass B — /25 prefix — 126 usable hosts
Network address — the base address of the block (151.4.73.128). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 151.4.73.255 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 | 151.4.73.128/25 |
| Network Address | 151.4.73.128 |
| Broadcast Address | 151.4.73.255 |
| Subnet Mask | 255.255.255.128 |
| Wildcard Mask | 0.0.0.127 |
| Prefix Length | /25 |
| IP Address Class | Class B |
| Total IP Addresses | 128 |
| Usable Host Addresses | 126 |
| First Usable IP | 151.4.73.129 |
| Last Usable IP | 151.4.73.254 |
| Network (Hex) | 0x97044980 |
| Broadcast (Hex) | 0x970449FF |
| 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 151.4.73.128/25 into 2 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 151.4.73.128/26 | 151.4.73.128 | 151.4.73.129 | 151.4.73.190 | 151.4.73.191 | 62 |
| 2 | 151.4.73.192/26 | 151.4.73.192 | 151.4.73.193 | 151.4.73.254 | 151.4.73.255 | 62 |
Split 151.4.73.128/25 into 4 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 151.4.73.128/27 | 151.4.73.128 | 151.4.73.129 | 151.4.73.158 | 151.4.73.159 | 30 |
| 2 | 151.4.73.160/27 | 151.4.73.160 | 151.4.73.161 | 151.4.73.190 | 151.4.73.191 | 30 |
| 3 | 151.4.73.192/27 | 151.4.73.192 | 151.4.73.193 | 151.4.73.222 | 151.4.73.223 | 30 |
| 4 | 151.4.73.224/27 | 151.4.73.224 | 151.4.73.225 | 151.4.73.254 | 151.4.73.255 | 30 |
Split 151.4.73.128/25 into 8 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 151.4.73.128/28 | 151.4.73.128 | 151.4.73.129 | 151.4.73.142 | 151.4.73.143 | 14 |
| 2 | 151.4.73.144/28 | 151.4.73.144 | 151.4.73.145 | 151.4.73.158 | 151.4.73.159 | 14 |
| 3 | 151.4.73.160/28 | 151.4.73.160 | 151.4.73.161 | 151.4.73.174 | 151.4.73.175 | 14 |
| 4 | 151.4.73.176/28 | 151.4.73.176 | 151.4.73.177 | 151.4.73.190 | 151.4.73.191 | 14 |
| 5 | 151.4.73.192/28 | 151.4.73.192 | 151.4.73.193 | 151.4.73.206 | 151.4.73.207 | 14 |
| 6 | 151.4.73.208/28 | 151.4.73.208 | 151.4.73.209 | 151.4.73.222 | 151.4.73.223 | 14 |
| 7 | 151.4.73.224/28 | 151.4.73.224 | 151.4.73.225 | 151.4.73.238 | 151.4.73.239 | 14 |
| 8 | 151.4.73.240/28 | 151.4.73.240 | 151.4.73.241 | 151.4.73.254 | 151.4.73.255 | 14 |
Split 151.4.73.128/25 into 16 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 151.4.73.128/29 | 151.4.73.128 | 151.4.73.129 | 151.4.73.134 | 151.4.73.135 | 6 |
| 2 | 151.4.73.136/29 | 151.4.73.136 | 151.4.73.137 | 151.4.73.142 | 151.4.73.143 | 6 |
| 3 | 151.4.73.144/29 | 151.4.73.144 | 151.4.73.145 | 151.4.73.150 | 151.4.73.151 | 6 |
| 4 | 151.4.73.152/29 | 151.4.73.152 | 151.4.73.153 | 151.4.73.158 | 151.4.73.159 | 6 |
| 5 | 151.4.73.160/29 | 151.4.73.160 | 151.4.73.161 | 151.4.73.166 | 151.4.73.167 | 6 |
| 6 | 151.4.73.168/29 | 151.4.73.168 | 151.4.73.169 | 151.4.73.174 | 151.4.73.175 | 6 |
| 7 | 151.4.73.176/29 | 151.4.73.176 | 151.4.73.177 | 151.4.73.182 | 151.4.73.183 | 6 |
| 8 | 151.4.73.184/29 | 151.4.73.184 | 151.4.73.185 | 151.4.73.190 | 151.4.73.191 | 6 |
| 9 | 151.4.73.192/29 | 151.4.73.192 | 151.4.73.193 | 151.4.73.198 | 151.4.73.199 | 6 |
| 10 | 151.4.73.200/29 | 151.4.73.200 | 151.4.73.201 | 151.4.73.206 | 151.4.73.207 | 6 |
| 11 | 151.4.73.208/29 | 151.4.73.208 | 151.4.73.209 | 151.4.73.214 | 151.4.73.215 | 6 |
| 12 | 151.4.73.216/29 | 151.4.73.216 | 151.4.73.217 | 151.4.73.222 | 151.4.73.223 | 6 |
| 13 | 151.4.73.224/29 | 151.4.73.224 | 151.4.73.225 | 151.4.73.230 | 151.4.73.231 | 6 |
| 14 | 151.4.73.232/29 | 151.4.73.232 | 151.4.73.233 | 151.4.73.238 | 151.4.73.239 | 6 |
| 15 | 151.4.73.240/29 | 151.4.73.240 | 151.4.73.241 | 151.4.73.246 | 151.4.73.247 | 6 |
| 16 | 151.4.73.248/29 | 151.4.73.248 | 151.4.73.249 | 151.4.73.254 | 151.4.73.255 | 6 |
IP Address Sample
Showing first 16 of 128 total IPs.