166.71.66.0/25
PublicClass B — /25 prefix — 126 usable hosts
Network address — the base address of the block (166.71.66.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 166.71.66.127 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 126 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 255.255.255.128 is the dotted-decimal equivalent of /25. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 166.71.66.0/25 |
| Network Address | 166.71.66.0 |
| Broadcast Address | 166.71.66.127 |
| Subnet Mask | 255.255.255.128 |
| Wildcard Mask | 0.0.0.127 |
| Prefix Length | /25 |
| IP Address Class | Class B |
| Total IP Addresses | 128 |
| Usable Host Addresses | 126 |
| First Usable IP | 166.71.66.1 |
| Last Usable IP | 166.71.66.126 |
| Network (Hex) | 0xA6474200 |
| Broadcast (Hex) | 0xA647427F |
| Address Type | Public / Globally Routable |
Binary Representation
The first 25 bits (1s in the mask) identify the network. The remaining 7 bits identify hosts within the network.
Split into Equal Subnets
Split 166.71.66.0/25 into 2 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 166.71.66.0/26 | 166.71.66.0 | 166.71.66.1 | 166.71.66.62 | 166.71.66.63 | 62 |
| 2 | 166.71.66.64/26 | 166.71.66.64 | 166.71.66.65 | 166.71.66.126 | 166.71.66.127 | 62 |
Split 166.71.66.0/25 into 4 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 166.71.66.0/27 | 166.71.66.0 | 166.71.66.1 | 166.71.66.30 | 166.71.66.31 | 30 |
| 2 | 166.71.66.32/27 | 166.71.66.32 | 166.71.66.33 | 166.71.66.62 | 166.71.66.63 | 30 |
| 3 | 166.71.66.64/27 | 166.71.66.64 | 166.71.66.65 | 166.71.66.94 | 166.71.66.95 | 30 |
| 4 | 166.71.66.96/27 | 166.71.66.96 | 166.71.66.97 | 166.71.66.126 | 166.71.66.127 | 30 |
Split 166.71.66.0/25 into 8 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 166.71.66.0/28 | 166.71.66.0 | 166.71.66.1 | 166.71.66.14 | 166.71.66.15 | 14 |
| 2 | 166.71.66.16/28 | 166.71.66.16 | 166.71.66.17 | 166.71.66.30 | 166.71.66.31 | 14 |
| 3 | 166.71.66.32/28 | 166.71.66.32 | 166.71.66.33 | 166.71.66.46 | 166.71.66.47 | 14 |
| 4 | 166.71.66.48/28 | 166.71.66.48 | 166.71.66.49 | 166.71.66.62 | 166.71.66.63 | 14 |
| 5 | 166.71.66.64/28 | 166.71.66.64 | 166.71.66.65 | 166.71.66.78 | 166.71.66.79 | 14 |
| 6 | 166.71.66.80/28 | 166.71.66.80 | 166.71.66.81 | 166.71.66.94 | 166.71.66.95 | 14 |
| 7 | 166.71.66.96/28 | 166.71.66.96 | 166.71.66.97 | 166.71.66.110 | 166.71.66.111 | 14 |
| 8 | 166.71.66.112/28 | 166.71.66.112 | 166.71.66.113 | 166.71.66.126 | 166.71.66.127 | 14 |
Split 166.71.66.0/25 into 16 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 166.71.66.0/29 | 166.71.66.0 | 166.71.66.1 | 166.71.66.6 | 166.71.66.7 | 6 |
| 2 | 166.71.66.8/29 | 166.71.66.8 | 166.71.66.9 | 166.71.66.14 | 166.71.66.15 | 6 |
| 3 | 166.71.66.16/29 | 166.71.66.16 | 166.71.66.17 | 166.71.66.22 | 166.71.66.23 | 6 |
| 4 | 166.71.66.24/29 | 166.71.66.24 | 166.71.66.25 | 166.71.66.30 | 166.71.66.31 | 6 |
| 5 | 166.71.66.32/29 | 166.71.66.32 | 166.71.66.33 | 166.71.66.38 | 166.71.66.39 | 6 |
| 6 | 166.71.66.40/29 | 166.71.66.40 | 166.71.66.41 | 166.71.66.46 | 166.71.66.47 | 6 |
| 7 | 166.71.66.48/29 | 166.71.66.48 | 166.71.66.49 | 166.71.66.54 | 166.71.66.55 | 6 |
| 8 | 166.71.66.56/29 | 166.71.66.56 | 166.71.66.57 | 166.71.66.62 | 166.71.66.63 | 6 |
| 9 | 166.71.66.64/29 | 166.71.66.64 | 166.71.66.65 | 166.71.66.70 | 166.71.66.71 | 6 |
| 10 | 166.71.66.72/29 | 166.71.66.72 | 166.71.66.73 | 166.71.66.78 | 166.71.66.79 | 6 |
| 11 | 166.71.66.80/29 | 166.71.66.80 | 166.71.66.81 | 166.71.66.86 | 166.71.66.87 | 6 |
| 12 | 166.71.66.88/29 | 166.71.66.88 | 166.71.66.89 | 166.71.66.94 | 166.71.66.95 | 6 |
| 13 | 166.71.66.96/29 | 166.71.66.96 | 166.71.66.97 | 166.71.66.102 | 166.71.66.103 | 6 |
| 14 | 166.71.66.104/29 | 166.71.66.104 | 166.71.66.105 | 166.71.66.110 | 166.71.66.111 | 6 |
| 15 | 166.71.66.112/29 | 166.71.66.112 | 166.71.66.113 | 166.71.66.118 | 166.71.66.119 | 6 |
| 16 | 166.71.66.120/29 | 166.71.66.120 | 166.71.66.121 | 166.71.66.126 | 166.71.66.127 | 6 |
IP Address Sample
Showing first 16 of 128 total IPs.