173.221.151.0/25
PublicClass B — /25 prefix — 126 usable hosts
Network address — the base address of the block (173.221.151.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 173.221.151.127 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 126 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 255.255.255.128 is the dotted-decimal equivalent of /25. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 173.221.151.0/25 |
| Network Address | 173.221.151.0 |
| Broadcast Address | 173.221.151.127 |
| Subnet Mask | 255.255.255.128 |
| Wildcard Mask | 0.0.0.127 |
| Prefix Length | /25 |
| IP Address Class | Class B |
| Total IP Addresses | 128 |
| Usable Host Addresses | 126 |
| First Usable IP | 173.221.151.1 |
| Last Usable IP | 173.221.151.126 |
| Network (Hex) | 0xADDD9700 |
| Broadcast (Hex) | 0xADDD977F |
| Address Type | Public / Globally Routable |
Binary Representation
The first 25 bits (1s in the mask) identify the network. The remaining 7 bits identify hosts within the network.
Split into Equal Subnets
Split 173.221.151.0/25 into 2 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 173.221.151.0/26 | 173.221.151.0 | 173.221.151.1 | 173.221.151.62 | 173.221.151.63 | 62 |
| 2 | 173.221.151.64/26 | 173.221.151.64 | 173.221.151.65 | 173.221.151.126 | 173.221.151.127 | 62 |
Split 173.221.151.0/25 into 4 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 173.221.151.0/27 | 173.221.151.0 | 173.221.151.1 | 173.221.151.30 | 173.221.151.31 | 30 |
| 2 | 173.221.151.32/27 | 173.221.151.32 | 173.221.151.33 | 173.221.151.62 | 173.221.151.63 | 30 |
| 3 | 173.221.151.64/27 | 173.221.151.64 | 173.221.151.65 | 173.221.151.94 | 173.221.151.95 | 30 |
| 4 | 173.221.151.96/27 | 173.221.151.96 | 173.221.151.97 | 173.221.151.126 | 173.221.151.127 | 30 |
Split 173.221.151.0/25 into 8 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 173.221.151.0/28 | 173.221.151.0 | 173.221.151.1 | 173.221.151.14 | 173.221.151.15 | 14 |
| 2 | 173.221.151.16/28 | 173.221.151.16 | 173.221.151.17 | 173.221.151.30 | 173.221.151.31 | 14 |
| 3 | 173.221.151.32/28 | 173.221.151.32 | 173.221.151.33 | 173.221.151.46 | 173.221.151.47 | 14 |
| 4 | 173.221.151.48/28 | 173.221.151.48 | 173.221.151.49 | 173.221.151.62 | 173.221.151.63 | 14 |
| 5 | 173.221.151.64/28 | 173.221.151.64 | 173.221.151.65 | 173.221.151.78 | 173.221.151.79 | 14 |
| 6 | 173.221.151.80/28 | 173.221.151.80 | 173.221.151.81 | 173.221.151.94 | 173.221.151.95 | 14 |
| 7 | 173.221.151.96/28 | 173.221.151.96 | 173.221.151.97 | 173.221.151.110 | 173.221.151.111 | 14 |
| 8 | 173.221.151.112/28 | 173.221.151.112 | 173.221.151.113 | 173.221.151.126 | 173.221.151.127 | 14 |
Split 173.221.151.0/25 into 16 equal /29 subnets (6 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 173.221.151.0/29 | 173.221.151.0 | 173.221.151.1 | 173.221.151.6 | 173.221.151.7 | 6 |
| 2 | 173.221.151.8/29 | 173.221.151.8 | 173.221.151.9 | 173.221.151.14 | 173.221.151.15 | 6 |
| 3 | 173.221.151.16/29 | 173.221.151.16 | 173.221.151.17 | 173.221.151.22 | 173.221.151.23 | 6 |
| 4 | 173.221.151.24/29 | 173.221.151.24 | 173.221.151.25 | 173.221.151.30 | 173.221.151.31 | 6 |
| 5 | 173.221.151.32/29 | 173.221.151.32 | 173.221.151.33 | 173.221.151.38 | 173.221.151.39 | 6 |
| 6 | 173.221.151.40/29 | 173.221.151.40 | 173.221.151.41 | 173.221.151.46 | 173.221.151.47 | 6 |
| 7 | 173.221.151.48/29 | 173.221.151.48 | 173.221.151.49 | 173.221.151.54 | 173.221.151.55 | 6 |
| 8 | 173.221.151.56/29 | 173.221.151.56 | 173.221.151.57 | 173.221.151.62 | 173.221.151.63 | 6 |
| 9 | 173.221.151.64/29 | 173.221.151.64 | 173.221.151.65 | 173.221.151.70 | 173.221.151.71 | 6 |
| 10 | 173.221.151.72/29 | 173.221.151.72 | 173.221.151.73 | 173.221.151.78 | 173.221.151.79 | 6 |
| 11 | 173.221.151.80/29 | 173.221.151.80 | 173.221.151.81 | 173.221.151.86 | 173.221.151.87 | 6 |
| 12 | 173.221.151.88/29 | 173.221.151.88 | 173.221.151.89 | 173.221.151.94 | 173.221.151.95 | 6 |
| 13 | 173.221.151.96/29 | 173.221.151.96 | 173.221.151.97 | 173.221.151.102 | 173.221.151.103 | 6 |
| 14 | 173.221.151.104/29 | 173.221.151.104 | 173.221.151.105 | 173.221.151.110 | 173.221.151.111 | 6 |
| 15 | 173.221.151.112/29 | 173.221.151.112 | 173.221.151.113 | 173.221.151.118 | 173.221.151.119 | 6 |
| 16 | 173.221.151.120/29 | 173.221.151.120 | 173.221.151.121 | 173.221.151.126 | 173.221.151.127 | 6 |
IP Address Sample
Showing first 16 of 128 total IPs.