251.72.180.64/26
PublicClass E (Reserved) — /26 prefix — 62 usable hosts
Network address — the base address of the block (251.72.180.64). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 251.72.180.127 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 | 251.72.180.64/26 |
| Network Address | 251.72.180.64 |
| Broadcast Address | 251.72.180.127 |
| Subnet Mask | 255.255.255.192 |
| Wildcard Mask | 0.0.0.63 |
| Prefix Length | /26 |
| IP Address Class | Class E (Reserved) |
| Total IP Addresses | 64 |
| Usable Host Addresses | 62 |
| First Usable IP | 251.72.180.65 |
| Last Usable IP | 251.72.180.126 |
| Network (Hex) | 0xFB48B440 |
| Broadcast (Hex) | 0xFB48B47F |
| 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 251.72.180.64/26 into 2 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 251.72.180.64/27 | 251.72.180.64 | 251.72.180.65 | 251.72.180.94 | 251.72.180.95 | 30 |
| 2 | 251.72.180.96/27 | 251.72.180.96 | 251.72.180.97 | 251.72.180.126 | 251.72.180.127 | 30 |
Split 251.72.180.64/26 into 4 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 251.72.180.64/28 | 251.72.180.64 | 251.72.180.65 | 251.72.180.78 | 251.72.180.79 | 14 |
| 2 | 251.72.180.80/28 | 251.72.180.80 | 251.72.180.81 | 251.72.180.94 | 251.72.180.95 | 14 |
| 3 | 251.72.180.96/28 | 251.72.180.96 | 251.72.180.97 | 251.72.180.110 | 251.72.180.111 | 14 |
| 4 | 251.72.180.112/28 | 251.72.180.112 | 251.72.180.113 | 251.72.180.126 | 251.72.180.127 | 14 |
Split 251.72.180.64/26 into 8 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 251.72.180.64/29 | 251.72.180.64 | 251.72.180.65 | 251.72.180.70 | 251.72.180.71 | 6 |
| 2 | 251.72.180.72/29 | 251.72.180.72 | 251.72.180.73 | 251.72.180.78 | 251.72.180.79 | 6 |
| 3 | 251.72.180.80/29 | 251.72.180.80 | 251.72.180.81 | 251.72.180.86 | 251.72.180.87 | 6 |
| 4 | 251.72.180.88/29 | 251.72.180.88 | 251.72.180.89 | 251.72.180.94 | 251.72.180.95 | 6 |
| 5 | 251.72.180.96/29 | 251.72.180.96 | 251.72.180.97 | 251.72.180.102 | 251.72.180.103 | 6 |
| 6 | 251.72.180.104/29 | 251.72.180.104 | 251.72.180.105 | 251.72.180.110 | 251.72.180.111 | 6 |
| 7 | 251.72.180.112/29 | 251.72.180.112 | 251.72.180.113 | 251.72.180.118 | 251.72.180.119 | 6 |
| 8 | 251.72.180.120/29 | 251.72.180.120 | 251.72.180.121 | 251.72.180.126 | 251.72.180.127 | 6 |
Split 251.72.180.64/26 into 16 equal /30 subnets (2 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 251.72.180.64/30 | 251.72.180.64 | 251.72.180.65 | 251.72.180.66 | 251.72.180.67 | 2 |
| 2 | 251.72.180.68/30 | 251.72.180.68 | 251.72.180.69 | 251.72.180.70 | 251.72.180.71 | 2 |
| 3 | 251.72.180.72/30 | 251.72.180.72 | 251.72.180.73 | 251.72.180.74 | 251.72.180.75 | 2 |
| 4 | 251.72.180.76/30 | 251.72.180.76 | 251.72.180.77 | 251.72.180.78 | 251.72.180.79 | 2 |
| 5 | 251.72.180.80/30 | 251.72.180.80 | 251.72.180.81 | 251.72.180.82 | 251.72.180.83 | 2 |
| 6 | 251.72.180.84/30 | 251.72.180.84 | 251.72.180.85 | 251.72.180.86 | 251.72.180.87 | 2 |
| 7 | 251.72.180.88/30 | 251.72.180.88 | 251.72.180.89 | 251.72.180.90 | 251.72.180.91 | 2 |
| 8 | 251.72.180.92/30 | 251.72.180.92 | 251.72.180.93 | 251.72.180.94 | 251.72.180.95 | 2 |
| 9 | 251.72.180.96/30 | 251.72.180.96 | 251.72.180.97 | 251.72.180.98 | 251.72.180.99 | 2 |
| 10 | 251.72.180.100/30 | 251.72.180.100 | 251.72.180.101 | 251.72.180.102 | 251.72.180.103 | 2 |
| 11 | 251.72.180.104/30 | 251.72.180.104 | 251.72.180.105 | 251.72.180.106 | 251.72.180.107 | 2 |
| 12 | 251.72.180.108/30 | 251.72.180.108 | 251.72.180.109 | 251.72.180.110 | 251.72.180.111 | 2 |
| 13 | 251.72.180.112/30 | 251.72.180.112 | 251.72.180.113 | 251.72.180.114 | 251.72.180.115 | 2 |
| 14 | 251.72.180.116/30 | 251.72.180.116 | 251.72.180.117 | 251.72.180.118 | 251.72.180.119 | 2 |
| 15 | 251.72.180.120/30 | 251.72.180.120 | 251.72.180.121 | 251.72.180.122 | 251.72.180.123 | 2 |
| 16 | 251.72.180.124/30 | 251.72.180.124 | 251.72.180.125 | 251.72.180.126 | 251.72.180.127 | 2 |
IP Address Sample
Showing first 16 of 64 total IPs.