172.75.81.64/26
PublicClass B — /26 prefix — 62 usable hosts
Network address — the base address of the block (172.75.81.64). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 172.75.81.127 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 | 172.75.81.64/26 |
| Network Address | 172.75.81.64 |
| Broadcast Address | 172.75.81.127 |
| 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 | 172.75.81.65 |
| Last Usable IP | 172.75.81.126 |
| Network (Hex) | 0xAC4B5140 |
| Broadcast (Hex) | 0xAC4B517F |
| 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 172.75.81.64/26 into 2 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 172.75.81.64/27 | 172.75.81.64 | 172.75.81.65 | 172.75.81.94 | 172.75.81.95 | 30 |
| 2 | 172.75.81.96/27 | 172.75.81.96 | 172.75.81.97 | 172.75.81.126 | 172.75.81.127 | 30 |
Split 172.75.81.64/26 into 4 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 172.75.81.64/28 | 172.75.81.64 | 172.75.81.65 | 172.75.81.78 | 172.75.81.79 | 14 |
| 2 | 172.75.81.80/28 | 172.75.81.80 | 172.75.81.81 | 172.75.81.94 | 172.75.81.95 | 14 |
| 3 | 172.75.81.96/28 | 172.75.81.96 | 172.75.81.97 | 172.75.81.110 | 172.75.81.111 | 14 |
| 4 | 172.75.81.112/28 | 172.75.81.112 | 172.75.81.113 | 172.75.81.126 | 172.75.81.127 | 14 |
Split 172.75.81.64/26 into 8 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 172.75.81.64/29 | 172.75.81.64 | 172.75.81.65 | 172.75.81.70 | 172.75.81.71 | 6 |
| 2 | 172.75.81.72/29 | 172.75.81.72 | 172.75.81.73 | 172.75.81.78 | 172.75.81.79 | 6 |
| 3 | 172.75.81.80/29 | 172.75.81.80 | 172.75.81.81 | 172.75.81.86 | 172.75.81.87 | 6 |
| 4 | 172.75.81.88/29 | 172.75.81.88 | 172.75.81.89 | 172.75.81.94 | 172.75.81.95 | 6 |
| 5 | 172.75.81.96/29 | 172.75.81.96 | 172.75.81.97 | 172.75.81.102 | 172.75.81.103 | 6 |
| 6 | 172.75.81.104/29 | 172.75.81.104 | 172.75.81.105 | 172.75.81.110 | 172.75.81.111 | 6 |
| 7 | 172.75.81.112/29 | 172.75.81.112 | 172.75.81.113 | 172.75.81.118 | 172.75.81.119 | 6 |
| 8 | 172.75.81.120/29 | 172.75.81.120 | 172.75.81.121 | 172.75.81.126 | 172.75.81.127 | 6 |
Split 172.75.81.64/26 into 16 equal /30 subnets (2 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 172.75.81.64/30 | 172.75.81.64 | 172.75.81.65 | 172.75.81.66 | 172.75.81.67 | 2 |
| 2 | 172.75.81.68/30 | 172.75.81.68 | 172.75.81.69 | 172.75.81.70 | 172.75.81.71 | 2 |
| 3 | 172.75.81.72/30 | 172.75.81.72 | 172.75.81.73 | 172.75.81.74 | 172.75.81.75 | 2 |
| 4 | 172.75.81.76/30 | 172.75.81.76 | 172.75.81.77 | 172.75.81.78 | 172.75.81.79 | 2 |
| 5 | 172.75.81.80/30 | 172.75.81.80 | 172.75.81.81 | 172.75.81.82 | 172.75.81.83 | 2 |
| 6 | 172.75.81.84/30 | 172.75.81.84 | 172.75.81.85 | 172.75.81.86 | 172.75.81.87 | 2 |
| 7 | 172.75.81.88/30 | 172.75.81.88 | 172.75.81.89 | 172.75.81.90 | 172.75.81.91 | 2 |
| 8 | 172.75.81.92/30 | 172.75.81.92 | 172.75.81.93 | 172.75.81.94 | 172.75.81.95 | 2 |
| 9 | 172.75.81.96/30 | 172.75.81.96 | 172.75.81.97 | 172.75.81.98 | 172.75.81.99 | 2 |
| 10 | 172.75.81.100/30 | 172.75.81.100 | 172.75.81.101 | 172.75.81.102 | 172.75.81.103 | 2 |
| 11 | 172.75.81.104/30 | 172.75.81.104 | 172.75.81.105 | 172.75.81.106 | 172.75.81.107 | 2 |
| 12 | 172.75.81.108/30 | 172.75.81.108 | 172.75.81.109 | 172.75.81.110 | 172.75.81.111 | 2 |
| 13 | 172.75.81.112/30 | 172.75.81.112 | 172.75.81.113 | 172.75.81.114 | 172.75.81.115 | 2 |
| 14 | 172.75.81.116/30 | 172.75.81.116 | 172.75.81.117 | 172.75.81.118 | 172.75.81.119 | 2 |
| 15 | 172.75.81.120/30 | 172.75.81.120 | 172.75.81.121 | 172.75.81.122 | 172.75.81.123 | 2 |
| 16 | 172.75.81.124/30 | 172.75.81.124 | 172.75.81.125 | 172.75.81.126 | 172.75.81.127 | 2 |
IP Address Sample
Showing first 16 of 64 total IPs.