251.72.239.128/27
PublicClass E (Reserved) — /27 prefix — 30 usable hosts
Network address — the base address of the block (251.72.239.128). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 251.72.239.159 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 30 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 255.255.255.224 is the dotted-decimal equivalent of /27. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 251.72.239.128/27 |
| Network Address | 251.72.239.128 |
| Broadcast Address | 251.72.239.159 |
| Subnet Mask | 255.255.255.224 |
| Wildcard Mask | 0.0.0.31 |
| Prefix Length | /27 |
| IP Address Class | Class E (Reserved) |
| Total IP Addresses | 32 |
| Usable Host Addresses | 30 |
| First Usable IP | 251.72.239.129 |
| Last Usable IP | 251.72.239.158 |
| Network (Hex) | 0xFB48EF80 |
| Broadcast (Hex) | 0xFB48EF9F |
| Address Type | Public / Globally Routable |
Binary Representation
The first 27 bits (1s in the mask) identify the network. The remaining 5 bits identify hosts within the network.
Split into Equal Subnets
Split 251.72.239.128/27 into 2 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 251.72.239.128/28 | 251.72.239.128 | 251.72.239.129 | 251.72.239.142 | 251.72.239.143 | 14 |
| 2 | 251.72.239.144/28 | 251.72.239.144 | 251.72.239.145 | 251.72.239.158 | 251.72.239.159 | 14 |
Split 251.72.239.128/27 into 4 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 251.72.239.128/29 | 251.72.239.128 | 251.72.239.129 | 251.72.239.134 | 251.72.239.135 | 6 |
| 2 | 251.72.239.136/29 | 251.72.239.136 | 251.72.239.137 | 251.72.239.142 | 251.72.239.143 | 6 |
| 3 | 251.72.239.144/29 | 251.72.239.144 | 251.72.239.145 | 251.72.239.150 | 251.72.239.151 | 6 |
| 4 | 251.72.239.152/29 | 251.72.239.152 | 251.72.239.153 | 251.72.239.158 | 251.72.239.159 | 6 |
Split 251.72.239.128/27 into 8 equal /30 subnets (2 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 251.72.239.128/30 | 251.72.239.128 | 251.72.239.129 | 251.72.239.130 | 251.72.239.131 | 2 |
| 2 | 251.72.239.132/30 | 251.72.239.132 | 251.72.239.133 | 251.72.239.134 | 251.72.239.135 | 2 |
| 3 | 251.72.239.136/30 | 251.72.239.136 | 251.72.239.137 | 251.72.239.138 | 251.72.239.139 | 2 |
| 4 | 251.72.239.140/30 | 251.72.239.140 | 251.72.239.141 | 251.72.239.142 | 251.72.239.143 | 2 |
| 5 | 251.72.239.144/30 | 251.72.239.144 | 251.72.239.145 | 251.72.239.146 | 251.72.239.147 | 2 |
| 6 | 251.72.239.148/30 | 251.72.239.148 | 251.72.239.149 | 251.72.239.150 | 251.72.239.151 | 2 |
| 7 | 251.72.239.152/30 | 251.72.239.152 | 251.72.239.153 | 251.72.239.154 | 251.72.239.155 | 2 |
| 8 | 251.72.239.156/30 | 251.72.239.156 | 251.72.239.157 | 251.72.239.158 | 251.72.239.159 | 2 |
IP Address Sample
Showing first 16 of 32 total IPs.