159.152.48.0/21
PublicClass B — /21 prefix — 2,046 usable hosts
Network address — the base address of the block (159.152.48.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 159.152.55.255 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 | 159.152.48.0/21 |
| Network Address | 159.152.48.0 |
| Broadcast Address | 159.152.55.255 |
| Subnet Mask | 255.255.248.0 |
| Wildcard Mask | 0.0.7.255 |
| Prefix Length | /21 |
| IP Address Class | Class B |
| Total IP Addresses | 2,048 |
| Usable Host Addresses | 2,046 |
| First Usable IP | 159.152.48.1 |
| Last Usable IP | 159.152.55.254 |
| Network (Hex) | 0x9F983000 |
| Broadcast (Hex) | 0x9F9837FF |
| 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 159.152.48.0/21 into 2 equal /22 subnets (1,022 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 159.152.48.0/22 | 159.152.48.0 | 159.152.48.1 | 159.152.51.254 | 159.152.51.255 | 1,022 |
| 2 | 159.152.52.0/22 | 159.152.52.0 | 159.152.52.1 | 159.152.55.254 | 159.152.55.255 | 1,022 |
Split 159.152.48.0/21 into 4 equal /23 subnets (510 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 159.152.48.0/23 | 159.152.48.0 | 159.152.48.1 | 159.152.49.254 | 159.152.49.255 | 510 |
| 2 | 159.152.50.0/23 | 159.152.50.0 | 159.152.50.1 | 159.152.51.254 | 159.152.51.255 | 510 |
| 3 | 159.152.52.0/23 | 159.152.52.0 | 159.152.52.1 | 159.152.53.254 | 159.152.53.255 | 510 |
| 4 | 159.152.54.0/23 | 159.152.54.0 | 159.152.54.1 | 159.152.55.254 | 159.152.55.255 | 510 |
Split 159.152.48.0/21 into 8 equal /24 subnets (254 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 159.152.48.0/24 | 159.152.48.0 | 159.152.48.1 | 159.152.48.254 | 159.152.48.255 | 254 |
| 2 | 159.152.49.0/24 | 159.152.49.0 | 159.152.49.1 | 159.152.49.254 | 159.152.49.255 | 254 |
| 3 | 159.152.50.0/24 | 159.152.50.0 | 159.152.50.1 | 159.152.50.254 | 159.152.50.255 | 254 |
| 4 | 159.152.51.0/24 | 159.152.51.0 | 159.152.51.1 | 159.152.51.254 | 159.152.51.255 | 254 |
| 5 | 159.152.52.0/24 | 159.152.52.0 | 159.152.52.1 | 159.152.52.254 | 159.152.52.255 | 254 |
| 6 | 159.152.53.0/24 | 159.152.53.0 | 159.152.53.1 | 159.152.53.254 | 159.152.53.255 | 254 |
| 7 | 159.152.54.0/24 | 159.152.54.0 | 159.152.54.1 | 159.152.54.254 | 159.152.54.255 | 254 |
| 8 | 159.152.55.0/24 | 159.152.55.0 | 159.152.55.1 | 159.152.55.254 | 159.152.55.255 | 254 |
Split 159.152.48.0/21 into 16 equal /25 subnets (126 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 159.152.48.0/25 | 159.152.48.0 | 159.152.48.1 | 159.152.48.126 | 159.152.48.127 | 126 |
| 2 | 159.152.48.128/25 | 159.152.48.128 | 159.152.48.129 | 159.152.48.254 | 159.152.48.255 | 126 |
| 3 | 159.152.49.0/25 | 159.152.49.0 | 159.152.49.1 | 159.152.49.126 | 159.152.49.127 | 126 |
| 4 | 159.152.49.128/25 | 159.152.49.128 | 159.152.49.129 | 159.152.49.254 | 159.152.49.255 | 126 |
| 5 | 159.152.50.0/25 | 159.152.50.0 | 159.152.50.1 | 159.152.50.126 | 159.152.50.127 | 126 |
| 6 | 159.152.50.128/25 | 159.152.50.128 | 159.152.50.129 | 159.152.50.254 | 159.152.50.255 | 126 |
| 7 | 159.152.51.0/25 | 159.152.51.0 | 159.152.51.1 | 159.152.51.126 | 159.152.51.127 | 126 |
| 8 | 159.152.51.128/25 | 159.152.51.128 | 159.152.51.129 | 159.152.51.254 | 159.152.51.255 | 126 |
| 9 | 159.152.52.0/25 | 159.152.52.0 | 159.152.52.1 | 159.152.52.126 | 159.152.52.127 | 126 |
| 10 | 159.152.52.128/25 | 159.152.52.128 | 159.152.52.129 | 159.152.52.254 | 159.152.52.255 | 126 |
| 11 | 159.152.53.0/25 | 159.152.53.0 | 159.152.53.1 | 159.152.53.126 | 159.152.53.127 | 126 |
| 12 | 159.152.53.128/25 | 159.152.53.128 | 159.152.53.129 | 159.152.53.254 | 159.152.53.255 | 126 |
| 13 | 159.152.54.0/25 | 159.152.54.0 | 159.152.54.1 | 159.152.54.126 | 159.152.54.127 | 126 |
| 14 | 159.152.54.128/25 | 159.152.54.128 | 159.152.54.129 | 159.152.54.254 | 159.152.54.255 | 126 |
| 15 | 159.152.55.0/25 | 159.152.55.0 | 159.152.55.1 | 159.152.55.126 | 159.152.55.127 | 126 |
| 16 | 159.152.55.128/25 | 159.152.55.128 | 159.152.55.129 | 159.152.55.254 | 159.152.55.255 | 126 |