21.252.71.128/27
PublicClass A — /27 prefix — 30 usable hosts
Network address — the base address of the block (21.252.71.128). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 21.252.71.159 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 | 21.252.71.128/27 |
| Network Address | 21.252.71.128 |
| Broadcast Address | 21.252.71.159 |
| Subnet Mask | 255.255.255.224 |
| Wildcard Mask | 0.0.0.31 |
| Prefix Length | /27 |
| IP Address Class | Class A |
| Total IP Addresses | 32 |
| Usable Host Addresses | 30 |
| First Usable IP | 21.252.71.129 |
| Last Usable IP | 21.252.71.158 |
| Network (Hex) | 0x15FC4780 |
| Broadcast (Hex) | 0x15FC479F |
| 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 21.252.71.128/27 into 2 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 21.252.71.128/28 | 21.252.71.128 | 21.252.71.129 | 21.252.71.142 | 21.252.71.143 | 14 |
| 2 | 21.252.71.144/28 | 21.252.71.144 | 21.252.71.145 | 21.252.71.158 | 21.252.71.159 | 14 |
Split 21.252.71.128/27 into 4 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 21.252.71.128/29 | 21.252.71.128 | 21.252.71.129 | 21.252.71.134 | 21.252.71.135 | 6 |
| 2 | 21.252.71.136/29 | 21.252.71.136 | 21.252.71.137 | 21.252.71.142 | 21.252.71.143 | 6 |
| 3 | 21.252.71.144/29 | 21.252.71.144 | 21.252.71.145 | 21.252.71.150 | 21.252.71.151 | 6 |
| 4 | 21.252.71.152/29 | 21.252.71.152 | 21.252.71.153 | 21.252.71.158 | 21.252.71.159 | 6 |
Split 21.252.71.128/27 into 8 equal /30 subnets (2 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 21.252.71.128/30 | 21.252.71.128 | 21.252.71.129 | 21.252.71.130 | 21.252.71.131 | 2 |
| 2 | 21.252.71.132/30 | 21.252.71.132 | 21.252.71.133 | 21.252.71.134 | 21.252.71.135 | 2 |
| 3 | 21.252.71.136/30 | 21.252.71.136 | 21.252.71.137 | 21.252.71.138 | 21.252.71.139 | 2 |
| 4 | 21.252.71.140/30 | 21.252.71.140 | 21.252.71.141 | 21.252.71.142 | 21.252.71.143 | 2 |
| 5 | 21.252.71.144/30 | 21.252.71.144 | 21.252.71.145 | 21.252.71.146 | 21.252.71.147 | 2 |
| 6 | 21.252.71.148/30 | 21.252.71.148 | 21.252.71.149 | 21.252.71.150 | 21.252.71.151 | 2 |
| 7 | 21.252.71.152/30 | 21.252.71.152 | 21.252.71.153 | 21.252.71.154 | 21.252.71.155 | 2 |
| 8 | 21.252.71.156/30 | 21.252.71.156 | 21.252.71.157 | 21.252.71.158 | 21.252.71.159 | 2 |
IP Address Sample
Showing first 16 of 32 total IPs.