121.2.133.128/26
PublicClass A — /26 prefix — 62 usable hosts
Network address — the base address of the block (121.2.133.128). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 121.2.133.191 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 | 121.2.133.128/26 |
| Network Address | 121.2.133.128 |
| Broadcast Address | 121.2.133.191 |
| 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 | 121.2.133.129 |
| Last Usable IP | 121.2.133.190 |
| Network (Hex) | 0x79028580 |
| Broadcast (Hex) | 0x790285BF |
| 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 121.2.133.128/26 into 2 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 121.2.133.128/27 | 121.2.133.128 | 121.2.133.129 | 121.2.133.158 | 121.2.133.159 | 30 |
| 2 | 121.2.133.160/27 | 121.2.133.160 | 121.2.133.161 | 121.2.133.190 | 121.2.133.191 | 30 |
Split 121.2.133.128/26 into 4 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 121.2.133.128/28 | 121.2.133.128 | 121.2.133.129 | 121.2.133.142 | 121.2.133.143 | 14 |
| 2 | 121.2.133.144/28 | 121.2.133.144 | 121.2.133.145 | 121.2.133.158 | 121.2.133.159 | 14 |
| 3 | 121.2.133.160/28 | 121.2.133.160 | 121.2.133.161 | 121.2.133.174 | 121.2.133.175 | 14 |
| 4 | 121.2.133.176/28 | 121.2.133.176 | 121.2.133.177 | 121.2.133.190 | 121.2.133.191 | 14 |
Split 121.2.133.128/26 into 8 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 121.2.133.128/29 | 121.2.133.128 | 121.2.133.129 | 121.2.133.134 | 121.2.133.135 | 6 |
| 2 | 121.2.133.136/29 | 121.2.133.136 | 121.2.133.137 | 121.2.133.142 | 121.2.133.143 | 6 |
| 3 | 121.2.133.144/29 | 121.2.133.144 | 121.2.133.145 | 121.2.133.150 | 121.2.133.151 | 6 |
| 4 | 121.2.133.152/29 | 121.2.133.152 | 121.2.133.153 | 121.2.133.158 | 121.2.133.159 | 6 |
| 5 | 121.2.133.160/29 | 121.2.133.160 | 121.2.133.161 | 121.2.133.166 | 121.2.133.167 | 6 |
| 6 | 121.2.133.168/29 | 121.2.133.168 | 121.2.133.169 | 121.2.133.174 | 121.2.133.175 | 6 |
| 7 | 121.2.133.176/29 | 121.2.133.176 | 121.2.133.177 | 121.2.133.182 | 121.2.133.183 | 6 |
| 8 | 121.2.133.184/29 | 121.2.133.184 | 121.2.133.185 | 121.2.133.190 | 121.2.133.191 | 6 |
Split 121.2.133.128/26 into 16 equal /30 subnets (2 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 121.2.133.128/30 | 121.2.133.128 | 121.2.133.129 | 121.2.133.130 | 121.2.133.131 | 2 |
| 2 | 121.2.133.132/30 | 121.2.133.132 | 121.2.133.133 | 121.2.133.134 | 121.2.133.135 | 2 |
| 3 | 121.2.133.136/30 | 121.2.133.136 | 121.2.133.137 | 121.2.133.138 | 121.2.133.139 | 2 |
| 4 | 121.2.133.140/30 | 121.2.133.140 | 121.2.133.141 | 121.2.133.142 | 121.2.133.143 | 2 |
| 5 | 121.2.133.144/30 | 121.2.133.144 | 121.2.133.145 | 121.2.133.146 | 121.2.133.147 | 2 |
| 6 | 121.2.133.148/30 | 121.2.133.148 | 121.2.133.149 | 121.2.133.150 | 121.2.133.151 | 2 |
| 7 | 121.2.133.152/30 | 121.2.133.152 | 121.2.133.153 | 121.2.133.154 | 121.2.133.155 | 2 |
| 8 | 121.2.133.156/30 | 121.2.133.156 | 121.2.133.157 | 121.2.133.158 | 121.2.133.159 | 2 |
| 9 | 121.2.133.160/30 | 121.2.133.160 | 121.2.133.161 | 121.2.133.162 | 121.2.133.163 | 2 |
| 10 | 121.2.133.164/30 | 121.2.133.164 | 121.2.133.165 | 121.2.133.166 | 121.2.133.167 | 2 |
| 11 | 121.2.133.168/30 | 121.2.133.168 | 121.2.133.169 | 121.2.133.170 | 121.2.133.171 | 2 |
| 12 | 121.2.133.172/30 | 121.2.133.172 | 121.2.133.173 | 121.2.133.174 | 121.2.133.175 | 2 |
| 13 | 121.2.133.176/30 | 121.2.133.176 | 121.2.133.177 | 121.2.133.178 | 121.2.133.179 | 2 |
| 14 | 121.2.133.180/30 | 121.2.133.180 | 121.2.133.181 | 121.2.133.182 | 121.2.133.183 | 2 |
| 15 | 121.2.133.184/30 | 121.2.133.184 | 121.2.133.185 | 121.2.133.186 | 121.2.133.187 | 2 |
| 16 | 121.2.133.188/30 | 121.2.133.188 | 121.2.133.189 | 121.2.133.190 | 121.2.133.191 | 2 |
IP Address Sample
Showing first 16 of 64 total IPs.