72.243.1.128/25
PublicClass A — /25 prefix — 126 usable hosts
Network address — the base address of the block (72.243.1.128). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 72.243.1.255 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 | 72.243.1.128/25 |
| Network Address | 72.243.1.128 |
| Broadcast Address | 72.243.1.255 |
| 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 | 72.243.1.129 |
| Last Usable IP | 72.243.1.254 |
| Network (Hex) | 0x48F30180 |
| Broadcast (Hex) | 0x48F301FF |
| 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 72.243.1.128/25 into 2 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 72.243.1.128/26 | 72.243.1.128 | 72.243.1.129 | 72.243.1.190 | 72.243.1.191 | 62 |
| 2 | 72.243.1.192/26 | 72.243.1.192 | 72.243.1.193 | 72.243.1.254 | 72.243.1.255 | 62 |
Split 72.243.1.128/25 into 4 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 72.243.1.128/27 | 72.243.1.128 | 72.243.1.129 | 72.243.1.158 | 72.243.1.159 | 30 |
| 2 | 72.243.1.160/27 | 72.243.1.160 | 72.243.1.161 | 72.243.1.190 | 72.243.1.191 | 30 |
| 3 | 72.243.1.192/27 | 72.243.1.192 | 72.243.1.193 | 72.243.1.222 | 72.243.1.223 | 30 |
| 4 | 72.243.1.224/27 | 72.243.1.224 | 72.243.1.225 | 72.243.1.254 | 72.243.1.255 | 30 |
Split 72.243.1.128/25 into 8 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 72.243.1.128/28 | 72.243.1.128 | 72.243.1.129 | 72.243.1.142 | 72.243.1.143 | 14 |
| 2 | 72.243.1.144/28 | 72.243.1.144 | 72.243.1.145 | 72.243.1.158 | 72.243.1.159 | 14 |
| 3 | 72.243.1.160/28 | 72.243.1.160 | 72.243.1.161 | 72.243.1.174 | 72.243.1.175 | 14 |
| 4 | 72.243.1.176/28 | 72.243.1.176 | 72.243.1.177 | 72.243.1.190 | 72.243.1.191 | 14 |
| 5 | 72.243.1.192/28 | 72.243.1.192 | 72.243.1.193 | 72.243.1.206 | 72.243.1.207 | 14 |
| 6 | 72.243.1.208/28 | 72.243.1.208 | 72.243.1.209 | 72.243.1.222 | 72.243.1.223 | 14 |
| 7 | 72.243.1.224/28 | 72.243.1.224 | 72.243.1.225 | 72.243.1.238 | 72.243.1.239 | 14 |
| 8 | 72.243.1.240/28 | 72.243.1.240 | 72.243.1.241 | 72.243.1.254 | 72.243.1.255 | 14 |
Split 72.243.1.128/25 into 16 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 72.243.1.128/29 | 72.243.1.128 | 72.243.1.129 | 72.243.1.134 | 72.243.1.135 | 6 |
| 2 | 72.243.1.136/29 | 72.243.1.136 | 72.243.1.137 | 72.243.1.142 | 72.243.1.143 | 6 |
| 3 | 72.243.1.144/29 | 72.243.1.144 | 72.243.1.145 | 72.243.1.150 | 72.243.1.151 | 6 |
| 4 | 72.243.1.152/29 | 72.243.1.152 | 72.243.1.153 | 72.243.1.158 | 72.243.1.159 | 6 |
| 5 | 72.243.1.160/29 | 72.243.1.160 | 72.243.1.161 | 72.243.1.166 | 72.243.1.167 | 6 |
| 6 | 72.243.1.168/29 | 72.243.1.168 | 72.243.1.169 | 72.243.1.174 | 72.243.1.175 | 6 |
| 7 | 72.243.1.176/29 | 72.243.1.176 | 72.243.1.177 | 72.243.1.182 | 72.243.1.183 | 6 |
| 8 | 72.243.1.184/29 | 72.243.1.184 | 72.243.1.185 | 72.243.1.190 | 72.243.1.191 | 6 |
| 9 | 72.243.1.192/29 | 72.243.1.192 | 72.243.1.193 | 72.243.1.198 | 72.243.1.199 | 6 |
| 10 | 72.243.1.200/29 | 72.243.1.200 | 72.243.1.201 | 72.243.1.206 | 72.243.1.207 | 6 |
| 11 | 72.243.1.208/29 | 72.243.1.208 | 72.243.1.209 | 72.243.1.214 | 72.243.1.215 | 6 |
| 12 | 72.243.1.216/29 | 72.243.1.216 | 72.243.1.217 | 72.243.1.222 | 72.243.1.223 | 6 |
| 13 | 72.243.1.224/29 | 72.243.1.224 | 72.243.1.225 | 72.243.1.230 | 72.243.1.231 | 6 |
| 14 | 72.243.1.232/29 | 72.243.1.232 | 72.243.1.233 | 72.243.1.238 | 72.243.1.239 | 6 |
| 15 | 72.243.1.240/29 | 72.243.1.240 | 72.243.1.241 | 72.243.1.246 | 72.243.1.247 | 6 |
| 16 | 72.243.1.248/29 | 72.243.1.248 | 72.243.1.249 | 72.243.1.254 | 72.243.1.255 | 6 |
IP Address Sample
Showing first 16 of 128 total IPs.