120.52.12.40/30
PublicClass A — /30 prefix — 2 usable hosts
Network Address
120.52.12.40
Broadcast Address
120.52.12.43
Subnet Mask
255.255.255.252
Usable Hosts
2
First Usable IP
120.52.12.41
Last Usable IP
120.52.12.42
Total IPs
4
Prefix Length
Network address — the base address of the block (120.52.12.40). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 120.52.12.43 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 — 255.255.255.252 is the dotted-decimal equivalent of /30. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 120.52.12.40/30 |
| Network Address | 120.52.12.40 |
| Broadcast Address | 120.52.12.43 |
| Subnet Mask | 255.255.255.252 |
| Wildcard Mask | 0.0.0.3 |
| Prefix Length | /30 |
| IP Address Class | Class A |
| Total IP Addresses | 4 |
| Usable Host Addresses | 2 |
| First Usable IP | 120.52.12.41 |
| Last Usable IP | 120.52.12.42 |
| Network (Hex) | 0x78340C28 |
| Broadcast (Hex) | 0x78340C2B |
| Address Type | Public / Globally Routable |
Binary Representation
Network Address
01111000.00110100.00001100
01111000.00110100.00001100.00101000
Subnet Mask
11111111.11111111.11111111.11111100
The first 30 bits (1s in the mask) identify the network. The remaining 2 bits identify hosts within the network.
All 4 IP Addresses in this Range
120.52.12.40
net
120.52.12.41
120.52.12.42
120.52.12.43
bcast
/30 Subnet Reference
Total IPs
4
Usable Hosts
2
Subnet Mask
255.255.255.252
Wildcard
0.0.0.3