10.0.20.128/26
Private (RFC 1918) RFC 1918Class A — /26 prefix — 62 usable hosts
Network address — the base address of the block (10.0.20.128). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 10.0.20.191 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 62 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 255.255.255.192 is the dotted-decimal equivalent of /26. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 10.0.20.128/26 |
| Network Address | 10.0.20.128 |
| Broadcast Address | 10.0.20.191 |
| Subnet Mask | 255.255.255.192 |
| Wildcard Mask | 0.0.0.63 |
| Prefix Length | /26 |
| IP Address Class | Class A |
| Total IP Addresses | 64 |
| Usable Host Addresses | 62 |
| First Usable IP | 10.0.20.129 |
| Last Usable IP | 10.0.20.190 |
| Network (Hex) | 0x0A001480 |
| Broadcast (Hex) | 0x0A0014BF |
| Governing RFC | RFC 1918 |
| Address Type | Private (RFC 1918) |
Binary Representation
The first 26 bits (1s in the mask) identify the network. The remaining 6 bits identify hosts within the network.
Subnet Breakdown — splitting into /27
This /26 block can be divided into 2 /27 subnets.
| CIDR | Network | Broadcast | First Usable | Last Usable | Hosts |
|---|---|---|---|---|---|
| 10.0.20.128/27 | 10.0.20.128 | 10.0.20.159 | 10.0.20.129 | 10.0.20.158 | 30 |
| 10.0.20.160/27 | 10.0.20.160 | 10.0.20.191 | 10.0.20.161 | 10.0.20.190 | 30 |
IP Address Sample
Showing first 16 of 64 total IPs.