77.1.157.128/25
PublicClass A — /25 prefix — 126 usable hosts
Network address — the base address of the block (77.1.157.128). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 77.1.157.255 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 | 77.1.157.128/25 |
| Network Address | 77.1.157.128 |
| Broadcast Address | 77.1.157.255 |
| 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 | 77.1.157.129 |
| Last Usable IP | 77.1.157.254 |
| Network (Hex) | 0x4D019D80 |
| Broadcast (Hex) | 0x4D019DFF |
| 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 77.1.157.128/25 into 2 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 77.1.157.128/26 | 77.1.157.128 | 77.1.157.129 | 77.1.157.190 | 77.1.157.191 | 62 |
| 2 | 77.1.157.192/26 | 77.1.157.192 | 77.1.157.193 | 77.1.157.254 | 77.1.157.255 | 62 |
Split 77.1.157.128/25 into 4 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 77.1.157.128/27 | 77.1.157.128 | 77.1.157.129 | 77.1.157.158 | 77.1.157.159 | 30 |
| 2 | 77.1.157.160/27 | 77.1.157.160 | 77.1.157.161 | 77.1.157.190 | 77.1.157.191 | 30 |
| 3 | 77.1.157.192/27 | 77.1.157.192 | 77.1.157.193 | 77.1.157.222 | 77.1.157.223 | 30 |
| 4 | 77.1.157.224/27 | 77.1.157.224 | 77.1.157.225 | 77.1.157.254 | 77.1.157.255 | 30 |
Split 77.1.157.128/25 into 8 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 77.1.157.128/28 | 77.1.157.128 | 77.1.157.129 | 77.1.157.142 | 77.1.157.143 | 14 |
| 2 | 77.1.157.144/28 | 77.1.157.144 | 77.1.157.145 | 77.1.157.158 | 77.1.157.159 | 14 |
| 3 | 77.1.157.160/28 | 77.1.157.160 | 77.1.157.161 | 77.1.157.174 | 77.1.157.175 | 14 |
| 4 | 77.1.157.176/28 | 77.1.157.176 | 77.1.157.177 | 77.1.157.190 | 77.1.157.191 | 14 |
| 5 | 77.1.157.192/28 | 77.1.157.192 | 77.1.157.193 | 77.1.157.206 | 77.1.157.207 | 14 |
| 6 | 77.1.157.208/28 | 77.1.157.208 | 77.1.157.209 | 77.1.157.222 | 77.1.157.223 | 14 |
| 7 | 77.1.157.224/28 | 77.1.157.224 | 77.1.157.225 | 77.1.157.238 | 77.1.157.239 | 14 |
| 8 | 77.1.157.240/28 | 77.1.157.240 | 77.1.157.241 | 77.1.157.254 | 77.1.157.255 | 14 |
Split 77.1.157.128/25 into 16 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 77.1.157.128/29 | 77.1.157.128 | 77.1.157.129 | 77.1.157.134 | 77.1.157.135 | 6 |
| 2 | 77.1.157.136/29 | 77.1.157.136 | 77.1.157.137 | 77.1.157.142 | 77.1.157.143 | 6 |
| 3 | 77.1.157.144/29 | 77.1.157.144 | 77.1.157.145 | 77.1.157.150 | 77.1.157.151 | 6 |
| 4 | 77.1.157.152/29 | 77.1.157.152 | 77.1.157.153 | 77.1.157.158 | 77.1.157.159 | 6 |
| 5 | 77.1.157.160/29 | 77.1.157.160 | 77.1.157.161 | 77.1.157.166 | 77.1.157.167 | 6 |
| 6 | 77.1.157.168/29 | 77.1.157.168 | 77.1.157.169 | 77.1.157.174 | 77.1.157.175 | 6 |
| 7 | 77.1.157.176/29 | 77.1.157.176 | 77.1.157.177 | 77.1.157.182 | 77.1.157.183 | 6 |
| 8 | 77.1.157.184/29 | 77.1.157.184 | 77.1.157.185 | 77.1.157.190 | 77.1.157.191 | 6 |
| 9 | 77.1.157.192/29 | 77.1.157.192 | 77.1.157.193 | 77.1.157.198 | 77.1.157.199 | 6 |
| 10 | 77.1.157.200/29 | 77.1.157.200 | 77.1.157.201 | 77.1.157.206 | 77.1.157.207 | 6 |
| 11 | 77.1.157.208/29 | 77.1.157.208 | 77.1.157.209 | 77.1.157.214 | 77.1.157.215 | 6 |
| 12 | 77.1.157.216/29 | 77.1.157.216 | 77.1.157.217 | 77.1.157.222 | 77.1.157.223 | 6 |
| 13 | 77.1.157.224/29 | 77.1.157.224 | 77.1.157.225 | 77.1.157.230 | 77.1.157.231 | 6 |
| 14 | 77.1.157.232/29 | 77.1.157.232 | 77.1.157.233 | 77.1.157.238 | 77.1.157.239 | 6 |
| 15 | 77.1.157.240/29 | 77.1.157.240 | 77.1.157.241 | 77.1.157.246 | 77.1.157.247 | 6 |
| 16 | 77.1.157.248/29 | 77.1.157.248 | 77.1.157.249 | 77.1.157.254 | 77.1.157.255 | 6 |
IP Address Sample
Showing first 16 of 128 total IPs.