21.252.181.64/26
PublicClass A — /26 prefix — 62 usable hosts
Network address — the base address of the block (21.252.181.64). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 21.252.181.127 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 | 21.252.181.64/26 |
| Network Address | 21.252.181.64 |
| Broadcast Address | 21.252.181.127 |
| 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 | 21.252.181.65 |
| Last Usable IP | 21.252.181.126 |
| Network (Hex) | 0x15FCB540 |
| Broadcast (Hex) | 0x15FCB57F |
| 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 21.252.181.64/26 into 2 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 21.252.181.64/27 | 21.252.181.64 | 21.252.181.65 | 21.252.181.94 | 21.252.181.95 | 30 |
| 2 | 21.252.181.96/27 | 21.252.181.96 | 21.252.181.97 | 21.252.181.126 | 21.252.181.127 | 30 |
Split 21.252.181.64/26 into 4 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 21.252.181.64/28 | 21.252.181.64 | 21.252.181.65 | 21.252.181.78 | 21.252.181.79 | 14 |
| 2 | 21.252.181.80/28 | 21.252.181.80 | 21.252.181.81 | 21.252.181.94 | 21.252.181.95 | 14 |
| 3 | 21.252.181.96/28 | 21.252.181.96 | 21.252.181.97 | 21.252.181.110 | 21.252.181.111 | 14 |
| 4 | 21.252.181.112/28 | 21.252.181.112 | 21.252.181.113 | 21.252.181.126 | 21.252.181.127 | 14 |
Split 21.252.181.64/26 into 8 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 21.252.181.64/29 | 21.252.181.64 | 21.252.181.65 | 21.252.181.70 | 21.252.181.71 | 6 |
| 2 | 21.252.181.72/29 | 21.252.181.72 | 21.252.181.73 | 21.252.181.78 | 21.252.181.79 | 6 |
| 3 | 21.252.181.80/29 | 21.252.181.80 | 21.252.181.81 | 21.252.181.86 | 21.252.181.87 | 6 |
| 4 | 21.252.181.88/29 | 21.252.181.88 | 21.252.181.89 | 21.252.181.94 | 21.252.181.95 | 6 |
| 5 | 21.252.181.96/29 | 21.252.181.96 | 21.252.181.97 | 21.252.181.102 | 21.252.181.103 | 6 |
| 6 | 21.252.181.104/29 | 21.252.181.104 | 21.252.181.105 | 21.252.181.110 | 21.252.181.111 | 6 |
| 7 | 21.252.181.112/29 | 21.252.181.112 | 21.252.181.113 | 21.252.181.118 | 21.252.181.119 | 6 |
| 8 | 21.252.181.120/29 | 21.252.181.120 | 21.252.181.121 | 21.252.181.126 | 21.252.181.127 | 6 |
Split 21.252.181.64/26 into 16 equal /30 subnets (2 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 21.252.181.64/30 | 21.252.181.64 | 21.252.181.65 | 21.252.181.66 | 21.252.181.67 | 2 |
| 2 | 21.252.181.68/30 | 21.252.181.68 | 21.252.181.69 | 21.252.181.70 | 21.252.181.71 | 2 |
| 3 | 21.252.181.72/30 | 21.252.181.72 | 21.252.181.73 | 21.252.181.74 | 21.252.181.75 | 2 |
| 4 | 21.252.181.76/30 | 21.252.181.76 | 21.252.181.77 | 21.252.181.78 | 21.252.181.79 | 2 |
| 5 | 21.252.181.80/30 | 21.252.181.80 | 21.252.181.81 | 21.252.181.82 | 21.252.181.83 | 2 |
| 6 | 21.252.181.84/30 | 21.252.181.84 | 21.252.181.85 | 21.252.181.86 | 21.252.181.87 | 2 |
| 7 | 21.252.181.88/30 | 21.252.181.88 | 21.252.181.89 | 21.252.181.90 | 21.252.181.91 | 2 |
| 8 | 21.252.181.92/30 | 21.252.181.92 | 21.252.181.93 | 21.252.181.94 | 21.252.181.95 | 2 |
| 9 | 21.252.181.96/30 | 21.252.181.96 | 21.252.181.97 | 21.252.181.98 | 21.252.181.99 | 2 |
| 10 | 21.252.181.100/30 | 21.252.181.100 | 21.252.181.101 | 21.252.181.102 | 21.252.181.103 | 2 |
| 11 | 21.252.181.104/30 | 21.252.181.104 | 21.252.181.105 | 21.252.181.106 | 21.252.181.107 | 2 |
| 12 | 21.252.181.108/30 | 21.252.181.108 | 21.252.181.109 | 21.252.181.110 | 21.252.181.111 | 2 |
| 13 | 21.252.181.112/30 | 21.252.181.112 | 21.252.181.113 | 21.252.181.114 | 21.252.181.115 | 2 |
| 14 | 21.252.181.116/30 | 21.252.181.116 | 21.252.181.117 | 21.252.181.118 | 21.252.181.119 | 2 |
| 15 | 21.252.181.120/30 | 21.252.181.120 | 21.252.181.121 | 21.252.181.122 | 21.252.181.123 | 2 |
| 16 | 21.252.181.124/30 | 21.252.181.124 | 21.252.181.125 | 21.252.181.126 | 21.252.181.127 | 2 |
IP Address Sample
Showing first 16 of 64 total IPs.