100.121.172.0/24
PublicClass A — /24 prefix — 254 usable hosts
Network address — the base address of the block (100.121.172.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 100.121.172.255 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 254 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 255.255.255.0 is the dotted-decimal equivalent of /24. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 100.121.172.0/24 |
| Network Address | 100.121.172.0 |
| Broadcast Address | 100.121.172.255 |
| Subnet Mask | 255.255.255.0 |
| Wildcard Mask | 0.0.0.255 |
| Prefix Length | /24 |
| IP Address Class | Class A |
| Total IP Addresses | 256 |
| Usable Host Addresses | 254 |
| First Usable IP | 100.121.172.1 |
| Last Usable IP | 100.121.172.254 |
| Network (Hex) | 0x6479AC00 |
| Broadcast (Hex) | 0x6479ACFF |
| Address Type | Public / Globally Routable |
Binary Representation
The first 24 bits (1s in the mask) identify the network. The remaining 8 bits identify hosts within the network.
Split into Equal Subnets
Split 100.121.172.0/24 into 2 equal /25 subnets (126 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 100.121.172.0/25 | 100.121.172.0 | 100.121.172.1 | 100.121.172.126 | 100.121.172.127 | 126 |
| 2 | 100.121.172.128/25 | 100.121.172.128 | 100.121.172.129 | 100.121.172.254 | 100.121.172.255 | 126 |
Split 100.121.172.0/24 into 4 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 100.121.172.0/26 | 100.121.172.0 | 100.121.172.1 | 100.121.172.62 | 100.121.172.63 | 62 |
| 2 | 100.121.172.64/26 | 100.121.172.64 | 100.121.172.65 | 100.121.172.126 | 100.121.172.127 | 62 |
| 3 | 100.121.172.128/26 | 100.121.172.128 | 100.121.172.129 | 100.121.172.190 | 100.121.172.191 | 62 |
| 4 | 100.121.172.192/26 | 100.121.172.192 | 100.121.172.193 | 100.121.172.254 | 100.121.172.255 | 62 |
Split 100.121.172.0/24 into 8 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 100.121.172.0/27 | 100.121.172.0 | 100.121.172.1 | 100.121.172.30 | 100.121.172.31 | 30 |
| 2 | 100.121.172.32/27 | 100.121.172.32 | 100.121.172.33 | 100.121.172.62 | 100.121.172.63 | 30 |
| 3 | 100.121.172.64/27 | 100.121.172.64 | 100.121.172.65 | 100.121.172.94 | 100.121.172.95 | 30 |
| 4 | 100.121.172.96/27 | 100.121.172.96 | 100.121.172.97 | 100.121.172.126 | 100.121.172.127 | 30 |
| 5 | 100.121.172.128/27 | 100.121.172.128 | 100.121.172.129 | 100.121.172.158 | 100.121.172.159 | 30 |
| 6 | 100.121.172.160/27 | 100.121.172.160 | 100.121.172.161 | 100.121.172.190 | 100.121.172.191 | 30 |
| 7 | 100.121.172.192/27 | 100.121.172.192 | 100.121.172.193 | 100.121.172.222 | 100.121.172.223 | 30 |
| 8 | 100.121.172.224/27 | 100.121.172.224 | 100.121.172.225 | 100.121.172.254 | 100.121.172.255 | 30 |
Split 100.121.172.0/24 into 16 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 100.121.172.0/28 | 100.121.172.0 | 100.121.172.1 | 100.121.172.14 | 100.121.172.15 | 14 |
| 2 | 100.121.172.16/28 | 100.121.172.16 | 100.121.172.17 | 100.121.172.30 | 100.121.172.31 | 14 |
| 3 | 100.121.172.32/28 | 100.121.172.32 | 100.121.172.33 | 100.121.172.46 | 100.121.172.47 | 14 |
| 4 | 100.121.172.48/28 | 100.121.172.48 | 100.121.172.49 | 100.121.172.62 | 100.121.172.63 | 14 |
| 5 | 100.121.172.64/28 | 100.121.172.64 | 100.121.172.65 | 100.121.172.78 | 100.121.172.79 | 14 |
| 6 | 100.121.172.80/28 | 100.121.172.80 | 100.121.172.81 | 100.121.172.94 | 100.121.172.95 | 14 |
| 7 | 100.121.172.96/28 | 100.121.172.96 | 100.121.172.97 | 100.121.172.110 | 100.121.172.111 | 14 |
| 8 | 100.121.172.112/28 | 100.121.172.112 | 100.121.172.113 | 100.121.172.126 | 100.121.172.127 | 14 |
| 9 | 100.121.172.128/28 | 100.121.172.128 | 100.121.172.129 | 100.121.172.142 | 100.121.172.143 | 14 |
| 10 | 100.121.172.144/28 | 100.121.172.144 | 100.121.172.145 | 100.121.172.158 | 100.121.172.159 | 14 |
| 11 | 100.121.172.160/28 | 100.121.172.160 | 100.121.172.161 | 100.121.172.174 | 100.121.172.175 | 14 |
| 12 | 100.121.172.176/28 | 100.121.172.176 | 100.121.172.177 | 100.121.172.190 | 100.121.172.191 | 14 |
| 13 | 100.121.172.192/28 | 100.121.172.192 | 100.121.172.193 | 100.121.172.206 | 100.121.172.207 | 14 |
| 14 | 100.121.172.208/28 | 100.121.172.208 | 100.121.172.209 | 100.121.172.222 | 100.121.172.223 | 14 |
| 15 | 100.121.172.224/28 | 100.121.172.224 | 100.121.172.225 | 100.121.172.238 | 100.121.172.239 | 14 |
| 16 | 100.121.172.240/28 | 100.121.172.240 | 100.121.172.241 | 100.121.172.254 | 100.121.172.255 | 14 |
IP Address Sample
Showing first 16 of 256 total IPs.