172.8.91.0/26
PublicClass B — /26 prefix — 62 usable hosts
Network address — the base address of the block (172.8.91.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 172.8.91.63 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 | 172.8.91.0/26 |
| Network Address | 172.8.91.0 |
| Broadcast Address | 172.8.91.63 |
| Subnet Mask | 255.255.255.192 |
| Wildcard Mask | 0.0.0.63 |
| Prefix Length | /26 |
| IP Address Class | Class B |
| Total IP Addresses | 64 |
| Usable Host Addresses | 62 |
| First Usable IP | 172.8.91.1 |
| Last Usable IP | 172.8.91.62 |
| Network (Hex) | 0xAC085B00 |
| Broadcast (Hex) | 0xAC085B3F |
| Address Type | Public / Globally Routable |
Binary Representation
The first 26 bits (1s in the mask) identify the network. The remaining 6 bits identify hosts within the network.
Split into Equal Subnets
Split 172.8.91.0/26 into 2 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 172.8.91.0/27 | 172.8.91.0 | 172.8.91.1 | 172.8.91.30 | 172.8.91.31 | 30 |
| 2 | 172.8.91.32/27 | 172.8.91.32 | 172.8.91.33 | 172.8.91.62 | 172.8.91.63 | 30 |
Split 172.8.91.0/26 into 4 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 172.8.91.0/28 | 172.8.91.0 | 172.8.91.1 | 172.8.91.14 | 172.8.91.15 | 14 |
| 2 | 172.8.91.16/28 | 172.8.91.16 | 172.8.91.17 | 172.8.91.30 | 172.8.91.31 | 14 |
| 3 | 172.8.91.32/28 | 172.8.91.32 | 172.8.91.33 | 172.8.91.46 | 172.8.91.47 | 14 |
| 4 | 172.8.91.48/28 | 172.8.91.48 | 172.8.91.49 | 172.8.91.62 | 172.8.91.63 | 14 |
Split 172.8.91.0/26 into 8 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 172.8.91.0/29 | 172.8.91.0 | 172.8.91.1 | 172.8.91.6 | 172.8.91.7 | 6 |
| 2 | 172.8.91.8/29 | 172.8.91.8 | 172.8.91.9 | 172.8.91.14 | 172.8.91.15 | 6 |
| 3 | 172.8.91.16/29 | 172.8.91.16 | 172.8.91.17 | 172.8.91.22 | 172.8.91.23 | 6 |
| 4 | 172.8.91.24/29 | 172.8.91.24 | 172.8.91.25 | 172.8.91.30 | 172.8.91.31 | 6 |
| 5 | 172.8.91.32/29 | 172.8.91.32 | 172.8.91.33 | 172.8.91.38 | 172.8.91.39 | 6 |
| 6 | 172.8.91.40/29 | 172.8.91.40 | 172.8.91.41 | 172.8.91.46 | 172.8.91.47 | 6 |
| 7 | 172.8.91.48/29 | 172.8.91.48 | 172.8.91.49 | 172.8.91.54 | 172.8.91.55 | 6 |
| 8 | 172.8.91.56/29 | 172.8.91.56 | 172.8.91.57 | 172.8.91.62 | 172.8.91.63 | 6 |
Split 172.8.91.0/26 into 16 equal /30 subnets (2 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 172.8.91.0/30 | 172.8.91.0 | 172.8.91.1 | 172.8.91.2 | 172.8.91.3 | 2 |
| 2 | 172.8.91.4/30 | 172.8.91.4 | 172.8.91.5 | 172.8.91.6 | 172.8.91.7 | 2 |
| 3 | 172.8.91.8/30 | 172.8.91.8 | 172.8.91.9 | 172.8.91.10 | 172.8.91.11 | 2 |
| 4 | 172.8.91.12/30 | 172.8.91.12 | 172.8.91.13 | 172.8.91.14 | 172.8.91.15 | 2 |
| 5 | 172.8.91.16/30 | 172.8.91.16 | 172.8.91.17 | 172.8.91.18 | 172.8.91.19 | 2 |
| 6 | 172.8.91.20/30 | 172.8.91.20 | 172.8.91.21 | 172.8.91.22 | 172.8.91.23 | 2 |
| 7 | 172.8.91.24/30 | 172.8.91.24 | 172.8.91.25 | 172.8.91.26 | 172.8.91.27 | 2 |
| 8 | 172.8.91.28/30 | 172.8.91.28 | 172.8.91.29 | 172.8.91.30 | 172.8.91.31 | 2 |
| 9 | 172.8.91.32/30 | 172.8.91.32 | 172.8.91.33 | 172.8.91.34 | 172.8.91.35 | 2 |
| 10 | 172.8.91.36/30 | 172.8.91.36 | 172.8.91.37 | 172.8.91.38 | 172.8.91.39 | 2 |
| 11 | 172.8.91.40/30 | 172.8.91.40 | 172.8.91.41 | 172.8.91.42 | 172.8.91.43 | 2 |
| 12 | 172.8.91.44/30 | 172.8.91.44 | 172.8.91.45 | 172.8.91.46 | 172.8.91.47 | 2 |
| 13 | 172.8.91.48/30 | 172.8.91.48 | 172.8.91.49 | 172.8.91.50 | 172.8.91.51 | 2 |
| 14 | 172.8.91.52/30 | 172.8.91.52 | 172.8.91.53 | 172.8.91.54 | 172.8.91.55 | 2 |
| 15 | 172.8.91.56/30 | 172.8.91.56 | 172.8.91.57 | 172.8.91.58 | 172.8.91.59 | 2 |
| 16 | 172.8.91.60/30 | 172.8.91.60 | 172.8.91.61 | 172.8.91.62 | 172.8.91.63 | 2 |
IP Address Sample
Showing first 16 of 64 total IPs.