57.181.142.224/31
PublicClass A — /31 prefix — 2 usable hosts
Network Address
57.181.142.224
Broadcast Address
57.181.142.225
Subnet Mask
255.255.255.254
Usable Hosts
2
First Usable IP
57.181.142.224
Last Usable IP
57.181.142.225
Total IPs
2
Prefix Length
Network address — the base address of the block (57.181.142.224). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 57.181.142.225 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 2 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 255.255.255.254 is the dotted-decimal equivalent of /31. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 57.181.142.224/31 |
| Network Address | 57.181.142.224 |
| Broadcast Address | 57.181.142.225 |
| Subnet Mask | 255.255.255.254 |
| Wildcard Mask | 0.0.0.1 |
| Prefix Length | /31 |
| IP Address Class | Class A |
| Total IP Addresses | 2 |
| Usable Host Addresses | 2 |
| First Usable IP | 57.181.142.224 |
| Last Usable IP | 57.181.142.225 |
| Network (Hex) | 0x39B58EE0 |
| Broadcast (Hex) | 0x39B58EE1 |
| Address Type | Public / Globally Routable |
Binary Representation
Network Address
00111001.10110101.10001110
00111001.10110101.10001110.11100000
Subnet Mask
11111111.11111111.11111111.11111110
The first 31 bits (1s in the mask) identify the network. The remaining 1 bits identify hosts within the network.
All 2 IP Addresses in this Range
57.181.142.224
net
57.181.142.225
bcast
/31 Subnet Reference
Total IPs
2
Usable Hosts
2
Subnet Mask
255.255.255.254
Wildcard
0.0.0.1