178.4.66.128/25
PublicClass B — /25 prefix — 126 usable hosts
Network address — the base address of the block (178.4.66.128). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 178.4.66.255 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 | 178.4.66.128/25 |
| Network Address | 178.4.66.128 |
| Broadcast Address | 178.4.66.255 |
| 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 | 178.4.66.129 |
| Last Usable IP | 178.4.66.254 |
| Network (Hex) | 0xB2044280 |
| Broadcast (Hex) | 0xB20442FF |
| 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 178.4.66.128/25 into 2 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 178.4.66.128/26 | 178.4.66.128 | 178.4.66.129 | 178.4.66.190 | 178.4.66.191 | 62 |
| 2 | 178.4.66.192/26 | 178.4.66.192 | 178.4.66.193 | 178.4.66.254 | 178.4.66.255 | 62 |
Split 178.4.66.128/25 into 4 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 178.4.66.128/27 | 178.4.66.128 | 178.4.66.129 | 178.4.66.158 | 178.4.66.159 | 30 |
| 2 | 178.4.66.160/27 | 178.4.66.160 | 178.4.66.161 | 178.4.66.190 | 178.4.66.191 | 30 |
| 3 | 178.4.66.192/27 | 178.4.66.192 | 178.4.66.193 | 178.4.66.222 | 178.4.66.223 | 30 |
| 4 | 178.4.66.224/27 | 178.4.66.224 | 178.4.66.225 | 178.4.66.254 | 178.4.66.255 | 30 |
Split 178.4.66.128/25 into 8 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 178.4.66.128/28 | 178.4.66.128 | 178.4.66.129 | 178.4.66.142 | 178.4.66.143 | 14 |
| 2 | 178.4.66.144/28 | 178.4.66.144 | 178.4.66.145 | 178.4.66.158 | 178.4.66.159 | 14 |
| 3 | 178.4.66.160/28 | 178.4.66.160 | 178.4.66.161 | 178.4.66.174 | 178.4.66.175 | 14 |
| 4 | 178.4.66.176/28 | 178.4.66.176 | 178.4.66.177 | 178.4.66.190 | 178.4.66.191 | 14 |
| 5 | 178.4.66.192/28 | 178.4.66.192 | 178.4.66.193 | 178.4.66.206 | 178.4.66.207 | 14 |
| 6 | 178.4.66.208/28 | 178.4.66.208 | 178.4.66.209 | 178.4.66.222 | 178.4.66.223 | 14 |
| 7 | 178.4.66.224/28 | 178.4.66.224 | 178.4.66.225 | 178.4.66.238 | 178.4.66.239 | 14 |
| 8 | 178.4.66.240/28 | 178.4.66.240 | 178.4.66.241 | 178.4.66.254 | 178.4.66.255 | 14 |
Split 178.4.66.128/25 into 16 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 178.4.66.128/29 | 178.4.66.128 | 178.4.66.129 | 178.4.66.134 | 178.4.66.135 | 6 |
| 2 | 178.4.66.136/29 | 178.4.66.136 | 178.4.66.137 | 178.4.66.142 | 178.4.66.143 | 6 |
| 3 | 178.4.66.144/29 | 178.4.66.144 | 178.4.66.145 | 178.4.66.150 | 178.4.66.151 | 6 |
| 4 | 178.4.66.152/29 | 178.4.66.152 | 178.4.66.153 | 178.4.66.158 | 178.4.66.159 | 6 |
| 5 | 178.4.66.160/29 | 178.4.66.160 | 178.4.66.161 | 178.4.66.166 | 178.4.66.167 | 6 |
| 6 | 178.4.66.168/29 | 178.4.66.168 | 178.4.66.169 | 178.4.66.174 | 178.4.66.175 | 6 |
| 7 | 178.4.66.176/29 | 178.4.66.176 | 178.4.66.177 | 178.4.66.182 | 178.4.66.183 | 6 |
| 8 | 178.4.66.184/29 | 178.4.66.184 | 178.4.66.185 | 178.4.66.190 | 178.4.66.191 | 6 |
| 9 | 178.4.66.192/29 | 178.4.66.192 | 178.4.66.193 | 178.4.66.198 | 178.4.66.199 | 6 |
| 10 | 178.4.66.200/29 | 178.4.66.200 | 178.4.66.201 | 178.4.66.206 | 178.4.66.207 | 6 |
| 11 | 178.4.66.208/29 | 178.4.66.208 | 178.4.66.209 | 178.4.66.214 | 178.4.66.215 | 6 |
| 12 | 178.4.66.216/29 | 178.4.66.216 | 178.4.66.217 | 178.4.66.222 | 178.4.66.223 | 6 |
| 13 | 178.4.66.224/29 | 178.4.66.224 | 178.4.66.225 | 178.4.66.230 | 178.4.66.231 | 6 |
| 14 | 178.4.66.232/29 | 178.4.66.232 | 178.4.66.233 | 178.4.66.238 | 178.4.66.239 | 6 |
| 15 | 178.4.66.240/29 | 178.4.66.240 | 178.4.66.241 | 178.4.66.246 | 178.4.66.247 | 6 |
| 16 | 178.4.66.248/29 | 178.4.66.248 | 178.4.66.249 | 178.4.66.254 | 178.4.66.255 | 6 |
IP Address Sample
Showing first 16 of 128 total IPs.