251.72.183.128/26
PublicClass E (Reserved) — /26 prefix — 62 usable hosts
Network address — the base address of the block (251.72.183.128). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 251.72.183.191 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 | 251.72.183.128/26 |
| Network Address | 251.72.183.128 |
| Broadcast Address | 251.72.183.191 |
| 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 | 251.72.183.129 |
| Last Usable IP | 251.72.183.190 |
| Network (Hex) | 0xFB48B780 |
| Broadcast (Hex) | 0xFB48B7BF |
| 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 251.72.183.128/26 into 2 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 251.72.183.128/27 | 251.72.183.128 | 251.72.183.129 | 251.72.183.158 | 251.72.183.159 | 30 |
| 2 | 251.72.183.160/27 | 251.72.183.160 | 251.72.183.161 | 251.72.183.190 | 251.72.183.191 | 30 |
Split 251.72.183.128/26 into 4 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 251.72.183.128/28 | 251.72.183.128 | 251.72.183.129 | 251.72.183.142 | 251.72.183.143 | 14 |
| 2 | 251.72.183.144/28 | 251.72.183.144 | 251.72.183.145 | 251.72.183.158 | 251.72.183.159 | 14 |
| 3 | 251.72.183.160/28 | 251.72.183.160 | 251.72.183.161 | 251.72.183.174 | 251.72.183.175 | 14 |
| 4 | 251.72.183.176/28 | 251.72.183.176 | 251.72.183.177 | 251.72.183.190 | 251.72.183.191 | 14 |
Split 251.72.183.128/26 into 8 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 251.72.183.128/29 | 251.72.183.128 | 251.72.183.129 | 251.72.183.134 | 251.72.183.135 | 6 |
| 2 | 251.72.183.136/29 | 251.72.183.136 | 251.72.183.137 | 251.72.183.142 | 251.72.183.143 | 6 |
| 3 | 251.72.183.144/29 | 251.72.183.144 | 251.72.183.145 | 251.72.183.150 | 251.72.183.151 | 6 |
| 4 | 251.72.183.152/29 | 251.72.183.152 | 251.72.183.153 | 251.72.183.158 | 251.72.183.159 | 6 |
| 5 | 251.72.183.160/29 | 251.72.183.160 | 251.72.183.161 | 251.72.183.166 | 251.72.183.167 | 6 |
| 6 | 251.72.183.168/29 | 251.72.183.168 | 251.72.183.169 | 251.72.183.174 | 251.72.183.175 | 6 |
| 7 | 251.72.183.176/29 | 251.72.183.176 | 251.72.183.177 | 251.72.183.182 | 251.72.183.183 | 6 |
| 8 | 251.72.183.184/29 | 251.72.183.184 | 251.72.183.185 | 251.72.183.190 | 251.72.183.191 | 6 |
Split 251.72.183.128/26 into 16 equal /30 subnets (2 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 251.72.183.128/30 | 251.72.183.128 | 251.72.183.129 | 251.72.183.130 | 251.72.183.131 | 2 |
| 2 | 251.72.183.132/30 | 251.72.183.132 | 251.72.183.133 | 251.72.183.134 | 251.72.183.135 | 2 |
| 3 | 251.72.183.136/30 | 251.72.183.136 | 251.72.183.137 | 251.72.183.138 | 251.72.183.139 | 2 |
| 4 | 251.72.183.140/30 | 251.72.183.140 | 251.72.183.141 | 251.72.183.142 | 251.72.183.143 | 2 |
| 5 | 251.72.183.144/30 | 251.72.183.144 | 251.72.183.145 | 251.72.183.146 | 251.72.183.147 | 2 |
| 6 | 251.72.183.148/30 | 251.72.183.148 | 251.72.183.149 | 251.72.183.150 | 251.72.183.151 | 2 |
| 7 | 251.72.183.152/30 | 251.72.183.152 | 251.72.183.153 | 251.72.183.154 | 251.72.183.155 | 2 |
| 8 | 251.72.183.156/30 | 251.72.183.156 | 251.72.183.157 | 251.72.183.158 | 251.72.183.159 | 2 |
| 9 | 251.72.183.160/30 | 251.72.183.160 | 251.72.183.161 | 251.72.183.162 | 251.72.183.163 | 2 |
| 10 | 251.72.183.164/30 | 251.72.183.164 | 251.72.183.165 | 251.72.183.166 | 251.72.183.167 | 2 |
| 11 | 251.72.183.168/30 | 251.72.183.168 | 251.72.183.169 | 251.72.183.170 | 251.72.183.171 | 2 |
| 12 | 251.72.183.172/30 | 251.72.183.172 | 251.72.183.173 | 251.72.183.174 | 251.72.183.175 | 2 |
| 13 | 251.72.183.176/30 | 251.72.183.176 | 251.72.183.177 | 251.72.183.178 | 251.72.183.179 | 2 |
| 14 | 251.72.183.180/30 | 251.72.183.180 | 251.72.183.181 | 251.72.183.182 | 251.72.183.183 | 2 |
| 15 | 251.72.183.184/30 | 251.72.183.184 | 251.72.183.185 | 251.72.183.186 | 251.72.183.187 | 2 |
| 16 | 251.72.183.188/30 | 251.72.183.188 | 251.72.183.189 | 251.72.183.190 | 251.72.183.191 | 2 |
IP Address Sample
Showing first 16 of 64 total IPs.