151.8.244.0/23
PublicClass B — /23 prefix — 510 usable hosts
Network address — the base address of the block (151.8.244.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 151.8.245.255 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 510 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 255.255.254.0 is the dotted-decimal equivalent of /23. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 151.8.244.0/23 |
| Network Address | 151.8.244.0 |
| Broadcast Address | 151.8.245.255 |
| Subnet Mask | 255.255.254.0 |
| Wildcard Mask | 0.0.1.255 |
| Prefix Length | /23 |
| IP Address Class | Class B |
| Total IP Addresses | 512 |
| Usable Host Addresses | 510 |
| First Usable IP | 151.8.244.1 |
| Last Usable IP | 151.8.245.254 |
| Network (Hex) | 0x9708F400 |
| Broadcast (Hex) | 0x9708F5FF |
| Address Type | Public / Globally Routable |
Binary Representation
The first 23 bits (1s in the mask) identify the network. The remaining 9 bits identify hosts within the network.
Split into Equal Subnets
Split 151.8.244.0/23 into 2 equal /24 subnets (254 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 151.8.244.0/24 | 151.8.244.0 | 151.8.244.1 | 151.8.244.254 | 151.8.244.255 | 254 |
| 2 | 151.8.245.0/24 | 151.8.245.0 | 151.8.245.1 | 151.8.245.254 | 151.8.245.255 | 254 |
Split 151.8.244.0/23 into 4 equal /25 subnets (126 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 151.8.244.0/25 | 151.8.244.0 | 151.8.244.1 | 151.8.244.126 | 151.8.244.127 | 126 |
| 2 | 151.8.244.128/25 | 151.8.244.128 | 151.8.244.129 | 151.8.244.254 | 151.8.244.255 | 126 |
| 3 | 151.8.245.0/25 | 151.8.245.0 | 151.8.245.1 | 151.8.245.126 | 151.8.245.127 | 126 |
| 4 | 151.8.245.128/25 | 151.8.245.128 | 151.8.245.129 | 151.8.245.254 | 151.8.245.255 | 126 |
Split 151.8.244.0/23 into 8 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 151.8.244.0/26 | 151.8.244.0 | 151.8.244.1 | 151.8.244.62 | 151.8.244.63 | 62 |
| 2 | 151.8.244.64/26 | 151.8.244.64 | 151.8.244.65 | 151.8.244.126 | 151.8.244.127 | 62 |
| 3 | 151.8.244.128/26 | 151.8.244.128 | 151.8.244.129 | 151.8.244.190 | 151.8.244.191 | 62 |
| 4 | 151.8.244.192/26 | 151.8.244.192 | 151.8.244.193 | 151.8.244.254 | 151.8.244.255 | 62 |
| 5 | 151.8.245.0/26 | 151.8.245.0 | 151.8.245.1 | 151.8.245.62 | 151.8.245.63 | 62 |
| 6 | 151.8.245.64/26 | 151.8.245.64 | 151.8.245.65 | 151.8.245.126 | 151.8.245.127 | 62 |
| 7 | 151.8.245.128/26 | 151.8.245.128 | 151.8.245.129 | 151.8.245.190 | 151.8.245.191 | 62 |
| 8 | 151.8.245.192/26 | 151.8.245.192 | 151.8.245.193 | 151.8.245.254 | 151.8.245.255 | 62 |
Split 151.8.244.0/23 into 16 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 151.8.244.0/27 | 151.8.244.0 | 151.8.244.1 | 151.8.244.30 | 151.8.244.31 | 30 |
| 2 | 151.8.244.32/27 | 151.8.244.32 | 151.8.244.33 | 151.8.244.62 | 151.8.244.63 | 30 |
| 3 | 151.8.244.64/27 | 151.8.244.64 | 151.8.244.65 | 151.8.244.94 | 151.8.244.95 | 30 |
| 4 | 151.8.244.96/27 | 151.8.244.96 | 151.8.244.97 | 151.8.244.126 | 151.8.244.127 | 30 |
| 5 | 151.8.244.128/27 | 151.8.244.128 | 151.8.244.129 | 151.8.244.158 | 151.8.244.159 | 30 |
| 6 | 151.8.244.160/27 | 151.8.244.160 | 151.8.244.161 | 151.8.244.190 | 151.8.244.191 | 30 |
| 7 | 151.8.244.192/27 | 151.8.244.192 | 151.8.244.193 | 151.8.244.222 | 151.8.244.223 | 30 |
| 8 | 151.8.244.224/27 | 151.8.244.224 | 151.8.244.225 | 151.8.244.254 | 151.8.244.255 | 30 |
| 9 | 151.8.245.0/27 | 151.8.245.0 | 151.8.245.1 | 151.8.245.30 | 151.8.245.31 | 30 |
| 10 | 151.8.245.32/27 | 151.8.245.32 | 151.8.245.33 | 151.8.245.62 | 151.8.245.63 | 30 |
| 11 | 151.8.245.64/27 | 151.8.245.64 | 151.8.245.65 | 151.8.245.94 | 151.8.245.95 | 30 |
| 12 | 151.8.245.96/27 | 151.8.245.96 | 151.8.245.97 | 151.8.245.126 | 151.8.245.127 | 30 |
| 13 | 151.8.245.128/27 | 151.8.245.128 | 151.8.245.129 | 151.8.245.158 | 151.8.245.159 | 30 |
| 14 | 151.8.245.160/27 | 151.8.245.160 | 151.8.245.161 | 151.8.245.190 | 151.8.245.191 | 30 |
| 15 | 151.8.245.192/27 | 151.8.245.192 | 151.8.245.193 | 151.8.245.222 | 151.8.245.223 | 30 |
| 16 | 151.8.245.224/27 | 151.8.245.224 | 151.8.245.225 | 151.8.245.254 | 151.8.245.255 | 30 |