102.159.42.0/23
PublicClass A — /23 prefix — 510 usable hosts
Network address — the base address of the block (102.159.42.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 102.159.43.255 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 | 102.159.42.0/23 |
| Network Address | 102.159.42.0 |
| Broadcast Address | 102.159.43.255 |
| Subnet Mask | 255.255.254.0 |
| Wildcard Mask | 0.0.1.255 |
| Prefix Length | /23 |
| IP Address Class | Class A |
| Total IP Addresses | 512 |
| Usable Host Addresses | 510 |
| First Usable IP | 102.159.42.1 |
| Last Usable IP | 102.159.43.254 |
| Network (Hex) | 0x669F2A00 |
| Broadcast (Hex) | 0x669F2BFF |
| 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 102.159.42.0/23 into 2 equal /24 subnets (254 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 102.159.42.0/24 | 102.159.42.0 | 102.159.42.1 | 102.159.42.254 | 102.159.42.255 | 254 |
| 2 | 102.159.43.0/24 | 102.159.43.0 | 102.159.43.1 | 102.159.43.254 | 102.159.43.255 | 254 |
Split 102.159.42.0/23 into 4 equal /25 subnets (126 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 102.159.42.0/25 | 102.159.42.0 | 102.159.42.1 | 102.159.42.126 | 102.159.42.127 | 126 |
| 2 | 102.159.42.128/25 | 102.159.42.128 | 102.159.42.129 | 102.159.42.254 | 102.159.42.255 | 126 |
| 3 | 102.159.43.0/25 | 102.159.43.0 | 102.159.43.1 | 102.159.43.126 | 102.159.43.127 | 126 |
| 4 | 102.159.43.128/25 | 102.159.43.128 | 102.159.43.129 | 102.159.43.254 | 102.159.43.255 | 126 |
Split 102.159.42.0/23 into 8 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 102.159.42.0/26 | 102.159.42.0 | 102.159.42.1 | 102.159.42.62 | 102.159.42.63 | 62 |
| 2 | 102.159.42.64/26 | 102.159.42.64 | 102.159.42.65 | 102.159.42.126 | 102.159.42.127 | 62 |
| 3 | 102.159.42.128/26 | 102.159.42.128 | 102.159.42.129 | 102.159.42.190 | 102.159.42.191 | 62 |
| 4 | 102.159.42.192/26 | 102.159.42.192 | 102.159.42.193 | 102.159.42.254 | 102.159.42.255 | 62 |
| 5 | 102.159.43.0/26 | 102.159.43.0 | 102.159.43.1 | 102.159.43.62 | 102.159.43.63 | 62 |
| 6 | 102.159.43.64/26 | 102.159.43.64 | 102.159.43.65 | 102.159.43.126 | 102.159.43.127 | 62 |
| 7 | 102.159.43.128/26 | 102.159.43.128 | 102.159.43.129 | 102.159.43.190 | 102.159.43.191 | 62 |
| 8 | 102.159.43.192/26 | 102.159.43.192 | 102.159.43.193 | 102.159.43.254 | 102.159.43.255 | 62 |
Split 102.159.42.0/23 into 16 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 102.159.42.0/27 | 102.159.42.0 | 102.159.42.1 | 102.159.42.30 | 102.159.42.31 | 30 |
| 2 | 102.159.42.32/27 | 102.159.42.32 | 102.159.42.33 | 102.159.42.62 | 102.159.42.63 | 30 |
| 3 | 102.159.42.64/27 | 102.159.42.64 | 102.159.42.65 | 102.159.42.94 | 102.159.42.95 | 30 |
| 4 | 102.159.42.96/27 | 102.159.42.96 | 102.159.42.97 | 102.159.42.126 | 102.159.42.127 | 30 |
| 5 | 102.159.42.128/27 | 102.159.42.128 | 102.159.42.129 | 102.159.42.158 | 102.159.42.159 | 30 |
| 6 | 102.159.42.160/27 | 102.159.42.160 | 102.159.42.161 | 102.159.42.190 | 102.159.42.191 | 30 |
| 7 | 102.159.42.192/27 | 102.159.42.192 | 102.159.42.193 | 102.159.42.222 | 102.159.42.223 | 30 |
| 8 | 102.159.42.224/27 | 102.159.42.224 | 102.159.42.225 | 102.159.42.254 | 102.159.42.255 | 30 |
| 9 | 102.159.43.0/27 | 102.159.43.0 | 102.159.43.1 | 102.159.43.30 | 102.159.43.31 | 30 |
| 10 | 102.159.43.32/27 | 102.159.43.32 | 102.159.43.33 | 102.159.43.62 | 102.159.43.63 | 30 |
| 11 | 102.159.43.64/27 | 102.159.43.64 | 102.159.43.65 | 102.159.43.94 | 102.159.43.95 | 30 |
| 12 | 102.159.43.96/27 | 102.159.43.96 | 102.159.43.97 | 102.159.43.126 | 102.159.43.127 | 30 |
| 13 | 102.159.43.128/27 | 102.159.43.128 | 102.159.43.129 | 102.159.43.158 | 102.159.43.159 | 30 |
| 14 | 102.159.43.160/27 | 102.159.43.160 | 102.159.43.161 | 102.159.43.190 | 102.159.43.191 | 30 |
| 15 | 102.159.43.192/27 | 102.159.43.192 | 102.159.43.193 | 102.159.43.222 | 102.159.43.223 | 30 |
| 16 | 102.159.43.224/27 | 102.159.43.224 | 102.159.43.225 | 102.159.43.254 | 102.159.43.255 | 30 |