178.20.9.128/25
PublicClass B — /25 prefix — 126 usable hosts
Network address — the base address of the block (178.20.9.128). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 178.20.9.255 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 | 178.20.9.128/25 |
| Network Address | 178.20.9.128 |
| Broadcast Address | 178.20.9.255 |
| 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 | 178.20.9.129 |
| Last Usable IP | 178.20.9.254 |
| Network (Hex) | 0xB2140980 |
| Broadcast (Hex) | 0xB21409FF |
| 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 178.20.9.128/25 into 2 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 178.20.9.128/26 | 178.20.9.128 | 178.20.9.129 | 178.20.9.190 | 178.20.9.191 | 62 |
| 2 | 178.20.9.192/26 | 178.20.9.192 | 178.20.9.193 | 178.20.9.254 | 178.20.9.255 | 62 |
Split 178.20.9.128/25 into 4 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 178.20.9.128/27 | 178.20.9.128 | 178.20.9.129 | 178.20.9.158 | 178.20.9.159 | 30 |
| 2 | 178.20.9.160/27 | 178.20.9.160 | 178.20.9.161 | 178.20.9.190 | 178.20.9.191 | 30 |
| 3 | 178.20.9.192/27 | 178.20.9.192 | 178.20.9.193 | 178.20.9.222 | 178.20.9.223 | 30 |
| 4 | 178.20.9.224/27 | 178.20.9.224 | 178.20.9.225 | 178.20.9.254 | 178.20.9.255 | 30 |
Split 178.20.9.128/25 into 8 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 178.20.9.128/28 | 178.20.9.128 | 178.20.9.129 | 178.20.9.142 | 178.20.9.143 | 14 |
| 2 | 178.20.9.144/28 | 178.20.9.144 | 178.20.9.145 | 178.20.9.158 | 178.20.9.159 | 14 |
| 3 | 178.20.9.160/28 | 178.20.9.160 | 178.20.9.161 | 178.20.9.174 | 178.20.9.175 | 14 |
| 4 | 178.20.9.176/28 | 178.20.9.176 | 178.20.9.177 | 178.20.9.190 | 178.20.9.191 | 14 |
| 5 | 178.20.9.192/28 | 178.20.9.192 | 178.20.9.193 | 178.20.9.206 | 178.20.9.207 | 14 |
| 6 | 178.20.9.208/28 | 178.20.9.208 | 178.20.9.209 | 178.20.9.222 | 178.20.9.223 | 14 |
| 7 | 178.20.9.224/28 | 178.20.9.224 | 178.20.9.225 | 178.20.9.238 | 178.20.9.239 | 14 |
| 8 | 178.20.9.240/28 | 178.20.9.240 | 178.20.9.241 | 178.20.9.254 | 178.20.9.255 | 14 |
Split 178.20.9.128/25 into 16 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 178.20.9.128/29 | 178.20.9.128 | 178.20.9.129 | 178.20.9.134 | 178.20.9.135 | 6 |
| 2 | 178.20.9.136/29 | 178.20.9.136 | 178.20.9.137 | 178.20.9.142 | 178.20.9.143 | 6 |
| 3 | 178.20.9.144/29 | 178.20.9.144 | 178.20.9.145 | 178.20.9.150 | 178.20.9.151 | 6 |
| 4 | 178.20.9.152/29 | 178.20.9.152 | 178.20.9.153 | 178.20.9.158 | 178.20.9.159 | 6 |
| 5 | 178.20.9.160/29 | 178.20.9.160 | 178.20.9.161 | 178.20.9.166 | 178.20.9.167 | 6 |
| 6 | 178.20.9.168/29 | 178.20.9.168 | 178.20.9.169 | 178.20.9.174 | 178.20.9.175 | 6 |
| 7 | 178.20.9.176/29 | 178.20.9.176 | 178.20.9.177 | 178.20.9.182 | 178.20.9.183 | 6 |
| 8 | 178.20.9.184/29 | 178.20.9.184 | 178.20.9.185 | 178.20.9.190 | 178.20.9.191 | 6 |
| 9 | 178.20.9.192/29 | 178.20.9.192 | 178.20.9.193 | 178.20.9.198 | 178.20.9.199 | 6 |
| 10 | 178.20.9.200/29 | 178.20.9.200 | 178.20.9.201 | 178.20.9.206 | 178.20.9.207 | 6 |
| 11 | 178.20.9.208/29 | 178.20.9.208 | 178.20.9.209 | 178.20.9.214 | 178.20.9.215 | 6 |
| 12 | 178.20.9.216/29 | 178.20.9.216 | 178.20.9.217 | 178.20.9.222 | 178.20.9.223 | 6 |
| 13 | 178.20.9.224/29 | 178.20.9.224 | 178.20.9.225 | 178.20.9.230 | 178.20.9.231 | 6 |
| 14 | 178.20.9.232/29 | 178.20.9.232 | 178.20.9.233 | 178.20.9.238 | 178.20.9.239 | 6 |
| 15 | 178.20.9.240/29 | 178.20.9.240 | 178.20.9.241 | 178.20.9.246 | 178.20.9.247 | 6 |
| 16 | 178.20.9.248/29 | 178.20.9.248 | 178.20.9.249 | 178.20.9.254 | 178.20.9.255 | 6 |
IP Address Sample
Showing first 16 of 128 total IPs.