89.52.8.0/21
PublicClass A — /21 prefix — 2,046 usable hosts
Network address — the base address of the block (89.52.8.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 89.52.15.255 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 2,046 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 255.255.248.0 is the dotted-decimal equivalent of /21. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 89.52.8.0/21 |
| Network Address | 89.52.8.0 |
| Broadcast Address | 89.52.15.255 |
| Subnet Mask | 255.255.248.0 |
| Wildcard Mask | 0.0.7.255 |
| Prefix Length | /21 |
| IP Address Class | Class A |
| Total IP Addresses | 2,048 |
| Usable Host Addresses | 2,046 |
| First Usable IP | 89.52.8.1 |
| Last Usable IP | 89.52.15.254 |
| Network (Hex) | 0x59340800 |
| Broadcast (Hex) | 0x59340FFF |
| Address Type | Public / Globally Routable |
Binary Representation
The first 21 bits (1s in the mask) identify the network. The remaining 11 bits identify hosts within the network.
Split into Equal Subnets
Split 89.52.8.0/21 into 2 equal /22 subnets (1,022 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 89.52.8.0/22 | 89.52.8.0 | 89.52.8.1 | 89.52.11.254 | 89.52.11.255 | 1,022 |
| 2 | 89.52.12.0/22 | 89.52.12.0 | 89.52.12.1 | 89.52.15.254 | 89.52.15.255 | 1,022 |
Split 89.52.8.0/21 into 4 equal /23 subnets (510 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 89.52.8.0/23 | 89.52.8.0 | 89.52.8.1 | 89.52.9.254 | 89.52.9.255 | 510 |
| 2 | 89.52.10.0/23 | 89.52.10.0 | 89.52.10.1 | 89.52.11.254 | 89.52.11.255 | 510 |
| 3 | 89.52.12.0/23 | 89.52.12.0 | 89.52.12.1 | 89.52.13.254 | 89.52.13.255 | 510 |
| 4 | 89.52.14.0/23 | 89.52.14.0 | 89.52.14.1 | 89.52.15.254 | 89.52.15.255 | 510 |
Split 89.52.8.0/21 into 8 equal /24 subnets (254 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 89.52.8.0/24 | 89.52.8.0 | 89.52.8.1 | 89.52.8.254 | 89.52.8.255 | 254 |
| 2 | 89.52.9.0/24 | 89.52.9.0 | 89.52.9.1 | 89.52.9.254 | 89.52.9.255 | 254 |
| 3 | 89.52.10.0/24 | 89.52.10.0 | 89.52.10.1 | 89.52.10.254 | 89.52.10.255 | 254 |
| 4 | 89.52.11.0/24 | 89.52.11.0 | 89.52.11.1 | 89.52.11.254 | 89.52.11.255 | 254 |
| 5 | 89.52.12.0/24 | 89.52.12.0 | 89.52.12.1 | 89.52.12.254 | 89.52.12.255 | 254 |
| 6 | 89.52.13.0/24 | 89.52.13.0 | 89.52.13.1 | 89.52.13.254 | 89.52.13.255 | 254 |
| 7 | 89.52.14.0/24 | 89.52.14.0 | 89.52.14.1 | 89.52.14.254 | 89.52.14.255 | 254 |
| 8 | 89.52.15.0/24 | 89.52.15.0 | 89.52.15.1 | 89.52.15.254 | 89.52.15.255 | 254 |
Split 89.52.8.0/21 into 16 equal /25 subnets (126 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 89.52.8.0/25 | 89.52.8.0 | 89.52.8.1 | 89.52.8.126 | 89.52.8.127 | 126 |
| 2 | 89.52.8.128/25 | 89.52.8.128 | 89.52.8.129 | 89.52.8.254 | 89.52.8.255 | 126 |
| 3 | 89.52.9.0/25 | 89.52.9.0 | 89.52.9.1 | 89.52.9.126 | 89.52.9.127 | 126 |
| 4 | 89.52.9.128/25 | 89.52.9.128 | 89.52.9.129 | 89.52.9.254 | 89.52.9.255 | 126 |
| 5 | 89.52.10.0/25 | 89.52.10.0 | 89.52.10.1 | 89.52.10.126 | 89.52.10.127 | 126 |
| 6 | 89.52.10.128/25 | 89.52.10.128 | 89.52.10.129 | 89.52.10.254 | 89.52.10.255 | 126 |
| 7 | 89.52.11.0/25 | 89.52.11.0 | 89.52.11.1 | 89.52.11.126 | 89.52.11.127 | 126 |
| 8 | 89.52.11.128/25 | 89.52.11.128 | 89.52.11.129 | 89.52.11.254 | 89.52.11.255 | 126 |
| 9 | 89.52.12.0/25 | 89.52.12.0 | 89.52.12.1 | 89.52.12.126 | 89.52.12.127 | 126 |
| 10 | 89.52.12.128/25 | 89.52.12.128 | 89.52.12.129 | 89.52.12.254 | 89.52.12.255 | 126 |
| 11 | 89.52.13.0/25 | 89.52.13.0 | 89.52.13.1 | 89.52.13.126 | 89.52.13.127 | 126 |
| 12 | 89.52.13.128/25 | 89.52.13.128 | 89.52.13.129 | 89.52.13.254 | 89.52.13.255 | 126 |
| 13 | 89.52.14.0/25 | 89.52.14.0 | 89.52.14.1 | 89.52.14.126 | 89.52.14.127 | 126 |
| 14 | 89.52.14.128/25 | 89.52.14.128 | 89.52.14.129 | 89.52.14.254 | 89.52.14.255 | 126 |
| 15 | 89.52.15.0/25 | 89.52.15.0 | 89.52.15.1 | 89.52.15.126 | 89.52.15.127 | 126 |
| 16 | 89.52.15.128/25 | 89.52.15.128 | 89.52.15.129 | 89.52.15.254 | 89.52.15.255 | 126 |