28.96.0.0/11
PublicClass A — /11 prefix — 2,097,150 usable hosts
Network address — the base address of the block (28.96.0.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 28.127.255.255 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 2,097,150 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 255.224.0.0 is the dotted-decimal equivalent of /11. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 28.96.0.0/11 |
| Network Address | 28.96.0.0 |
| Broadcast Address | 28.127.255.255 |
| Subnet Mask | 255.224.0.0 |
| Wildcard Mask | 0.31.255.255 |
| Prefix Length | /11 |
| IP Address Class | Class A |
| Total IP Addresses | 2,097,152 |
| Usable Host Addresses | 2,097,150 |
| First Usable IP | 28.96.0.1 |
| Last Usable IP | 28.127.255.254 |
| Network (Hex) | 0x1C600000 |
| Broadcast (Hex) | 0x1C7FFFFF |
| Address Type | Public / Globally Routable |
Binary Representation
The first 11 bits (1s in the mask) identify the network. The remaining 21 bits identify hosts within the network.
Split into Equal Subnets
Split 28.96.0.0/11 into 2 equal /12 subnets (1,048,574 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 28.96.0.0/12 | 28.96.0.0 | 28.96.0.1 | 28.111.255.254 | 28.111.255.255 | 1,048,574 |
| 2 | 28.112.0.0/12 | 28.112.0.0 | 28.112.0.1 | 28.127.255.254 | 28.127.255.255 | 1,048,574 |
Split 28.96.0.0/11 into 4 equal /13 subnets (524,286 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 28.96.0.0/13 | 28.96.0.0 | 28.96.0.1 | 28.103.255.254 | 28.103.255.255 | 524,286 |
| 2 | 28.104.0.0/13 | 28.104.0.0 | 28.104.0.1 | 28.111.255.254 | 28.111.255.255 | 524,286 |
| 3 | 28.112.0.0/13 | 28.112.0.0 | 28.112.0.1 | 28.119.255.254 | 28.119.255.255 | 524,286 |
| 4 | 28.120.0.0/13 | 28.120.0.0 | 28.120.0.1 | 28.127.255.254 | 28.127.255.255 | 524,286 |
Split 28.96.0.0/11 into 8 equal /14 subnets (262,142 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 28.96.0.0/14 | 28.96.0.0 | 28.96.0.1 | 28.99.255.254 | 28.99.255.255 | 262,142 |
| 2 | 28.100.0.0/14 | 28.100.0.0 | 28.100.0.1 | 28.103.255.254 | 28.103.255.255 | 262,142 |
| 3 | 28.104.0.0/14 | 28.104.0.0 | 28.104.0.1 | 28.107.255.254 | 28.107.255.255 | 262,142 |
| 4 | 28.108.0.0/14 | 28.108.0.0 | 28.108.0.1 | 28.111.255.254 | 28.111.255.255 | 262,142 |
| 5 | 28.112.0.0/14 | 28.112.0.0 | 28.112.0.1 | 28.115.255.254 | 28.115.255.255 | 262,142 |
| 6 | 28.116.0.0/14 | 28.116.0.0 | 28.116.0.1 | 28.119.255.254 | 28.119.255.255 | 262,142 |
| 7 | 28.120.0.0/14 | 28.120.0.0 | 28.120.0.1 | 28.123.255.254 | 28.123.255.255 | 262,142 |
| 8 | 28.124.0.0/14 | 28.124.0.0 | 28.124.0.1 | 28.127.255.254 | 28.127.255.255 | 262,142 |
Split 28.96.0.0/11 into 16 equal /15 subnets (131,070 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 28.96.0.0/15 | 28.96.0.0 | 28.96.0.1 | 28.97.255.254 | 28.97.255.255 | 131,070 |
| 2 | 28.98.0.0/15 | 28.98.0.0 | 28.98.0.1 | 28.99.255.254 | 28.99.255.255 | 131,070 |
| 3 | 28.100.0.0/15 | 28.100.0.0 | 28.100.0.1 | 28.101.255.254 | 28.101.255.255 | 131,070 |
| 4 | 28.102.0.0/15 | 28.102.0.0 | 28.102.0.1 | 28.103.255.254 | 28.103.255.255 | 131,070 |
| 5 | 28.104.0.0/15 | 28.104.0.0 | 28.104.0.1 | 28.105.255.254 | 28.105.255.255 | 131,070 |
| 6 | 28.106.0.0/15 | 28.106.0.0 | 28.106.0.1 | 28.107.255.254 | 28.107.255.255 | 131,070 |
| 7 | 28.108.0.0/15 | 28.108.0.0 | 28.108.0.1 | 28.109.255.254 | 28.109.255.255 | 131,070 |
| 8 | 28.110.0.0/15 | 28.110.0.0 | 28.110.0.1 | 28.111.255.254 | 28.111.255.255 | 131,070 |
| 9 | 28.112.0.0/15 | 28.112.0.0 | 28.112.0.1 | 28.113.255.254 | 28.113.255.255 | 131,070 |
| 10 | 28.114.0.0/15 | 28.114.0.0 | 28.114.0.1 | 28.115.255.254 | 28.115.255.255 | 131,070 |
| 11 | 28.116.0.0/15 | 28.116.0.0 | 28.116.0.1 | 28.117.255.254 | 28.117.255.255 | 131,070 |
| 12 | 28.118.0.0/15 | 28.118.0.0 | 28.118.0.1 | 28.119.255.254 | 28.119.255.255 | 131,070 |
| 13 | 28.120.0.0/15 | 28.120.0.0 | 28.120.0.1 | 28.121.255.254 | 28.121.255.255 | 131,070 |
| 14 | 28.122.0.0/15 | 28.122.0.0 | 28.122.0.1 | 28.123.255.254 | 28.123.255.255 | 131,070 |
| 15 | 28.124.0.0/15 | 28.124.0.0 | 28.124.0.1 | 28.125.255.254 | 28.125.255.255 | 131,070 |
| 16 | 28.126.0.0/15 | 28.126.0.0 | 28.126.0.1 | 28.127.255.254 | 28.127.255.255 | 131,070 |