21.71.105.64/26
PublicClass A — /26 prefix — 62 usable hosts
Network address — the base address of the block (21.71.105.64). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 21.71.105.127 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 | 21.71.105.64/26 |
| Network Address | 21.71.105.64 |
| Broadcast Address | 21.71.105.127 |
| 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 | 21.71.105.65 |
| Last Usable IP | 21.71.105.126 |
| Network (Hex) | 0x15476940 |
| Broadcast (Hex) | 0x1547697F |
| 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 21.71.105.64/26 into 2 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 21.71.105.64/27 | 21.71.105.64 | 21.71.105.65 | 21.71.105.94 | 21.71.105.95 | 30 |
| 2 | 21.71.105.96/27 | 21.71.105.96 | 21.71.105.97 | 21.71.105.126 | 21.71.105.127 | 30 |
Split 21.71.105.64/26 into 4 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 21.71.105.64/28 | 21.71.105.64 | 21.71.105.65 | 21.71.105.78 | 21.71.105.79 | 14 |
| 2 | 21.71.105.80/28 | 21.71.105.80 | 21.71.105.81 | 21.71.105.94 | 21.71.105.95 | 14 |
| 3 | 21.71.105.96/28 | 21.71.105.96 | 21.71.105.97 | 21.71.105.110 | 21.71.105.111 | 14 |
| 4 | 21.71.105.112/28 | 21.71.105.112 | 21.71.105.113 | 21.71.105.126 | 21.71.105.127 | 14 |
Split 21.71.105.64/26 into 8 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 21.71.105.64/29 | 21.71.105.64 | 21.71.105.65 | 21.71.105.70 | 21.71.105.71 | 6 |
| 2 | 21.71.105.72/29 | 21.71.105.72 | 21.71.105.73 | 21.71.105.78 | 21.71.105.79 | 6 |
| 3 | 21.71.105.80/29 | 21.71.105.80 | 21.71.105.81 | 21.71.105.86 | 21.71.105.87 | 6 |
| 4 | 21.71.105.88/29 | 21.71.105.88 | 21.71.105.89 | 21.71.105.94 | 21.71.105.95 | 6 |
| 5 | 21.71.105.96/29 | 21.71.105.96 | 21.71.105.97 | 21.71.105.102 | 21.71.105.103 | 6 |
| 6 | 21.71.105.104/29 | 21.71.105.104 | 21.71.105.105 | 21.71.105.110 | 21.71.105.111 | 6 |
| 7 | 21.71.105.112/29 | 21.71.105.112 | 21.71.105.113 | 21.71.105.118 | 21.71.105.119 | 6 |
| 8 | 21.71.105.120/29 | 21.71.105.120 | 21.71.105.121 | 21.71.105.126 | 21.71.105.127 | 6 |
Split 21.71.105.64/26 into 16 equal /30 subnets (2 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 21.71.105.64/30 | 21.71.105.64 | 21.71.105.65 | 21.71.105.66 | 21.71.105.67 | 2 |
| 2 | 21.71.105.68/30 | 21.71.105.68 | 21.71.105.69 | 21.71.105.70 | 21.71.105.71 | 2 |
| 3 | 21.71.105.72/30 | 21.71.105.72 | 21.71.105.73 | 21.71.105.74 | 21.71.105.75 | 2 |
| 4 | 21.71.105.76/30 | 21.71.105.76 | 21.71.105.77 | 21.71.105.78 | 21.71.105.79 | 2 |
| 5 | 21.71.105.80/30 | 21.71.105.80 | 21.71.105.81 | 21.71.105.82 | 21.71.105.83 | 2 |
| 6 | 21.71.105.84/30 | 21.71.105.84 | 21.71.105.85 | 21.71.105.86 | 21.71.105.87 | 2 |
| 7 | 21.71.105.88/30 | 21.71.105.88 | 21.71.105.89 | 21.71.105.90 | 21.71.105.91 | 2 |
| 8 | 21.71.105.92/30 | 21.71.105.92 | 21.71.105.93 | 21.71.105.94 | 21.71.105.95 | 2 |
| 9 | 21.71.105.96/30 | 21.71.105.96 | 21.71.105.97 | 21.71.105.98 | 21.71.105.99 | 2 |
| 10 | 21.71.105.100/30 | 21.71.105.100 | 21.71.105.101 | 21.71.105.102 | 21.71.105.103 | 2 |
| 11 | 21.71.105.104/30 | 21.71.105.104 | 21.71.105.105 | 21.71.105.106 | 21.71.105.107 | 2 |
| 12 | 21.71.105.108/30 | 21.71.105.108 | 21.71.105.109 | 21.71.105.110 | 21.71.105.111 | 2 |
| 13 | 21.71.105.112/30 | 21.71.105.112 | 21.71.105.113 | 21.71.105.114 | 21.71.105.115 | 2 |
| 14 | 21.71.105.116/30 | 21.71.105.116 | 21.71.105.117 | 21.71.105.118 | 21.71.105.119 | 2 |
| 15 | 21.71.105.120/30 | 21.71.105.120 | 21.71.105.121 | 21.71.105.122 | 21.71.105.123 | 2 |
| 16 | 21.71.105.124/30 | 21.71.105.124 | 21.71.105.125 | 21.71.105.126 | 21.71.105.127 | 2 |
IP Address Sample
Showing first 16 of 64 total IPs.