10.0.2.120/30
Private (RFC 1918) RFC 1918Class A — /30 prefix — 2 usable hosts
Network Address
10.0.2.120
Broadcast Address
10.0.2.123
Subnet Mask
255.255.255.252
Usable Hosts
2
First Usable IP
10.0.2.121
Last Usable IP
10.0.2.122
Total IPs
4
Prefix Length
Network address — the base address of the block (10.0.2.120). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 10.0.2.123 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 | 10.0.2.120/30 |
| Network Address | 10.0.2.120 |
| Broadcast Address | 10.0.2.123 |
| 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 | 10.0.2.121 |
| Last Usable IP | 10.0.2.122 |
| Network (Hex) | 0x0A000278 |
| Broadcast (Hex) | 0x0A00027B |
| Governing RFC | RFC 1918 |
| Address Type | Private (RFC 1918) |
Binary Representation
Network Address
00001010.00000000.00000010
00001010.00000000.00000010.01111000
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
10.0.2.120
net
10.0.2.121
10.0.2.122
10.0.2.123
bcast
/30 Subnet Reference
Total IPs
4
Usable Hosts
2
Subnet Mask
255.255.255.252
Wildcard
0.0.0.3