10.0.0.100/30
Private (RFC 1918) RFC 1918Class A — /30 prefix — 2 usable hosts
Network Address
10.0.0.100
Broadcast Address
10.0.0.103
Subnet Mask
255.255.255.252
Usable Hosts
2
First Usable IP
10.0.0.101
Last Usable IP
10.0.0.102
Total IPs
4
Prefix Length
Network address — the base address of the block (10.0.0.100). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 10.0.0.103 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 | 10.0.0.100/30 |
| Network Address | 10.0.0.100 |
| Broadcast Address | 10.0.0.103 |
| 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 | 10.0.0.101 |
| Last Usable IP | 10.0.0.102 |
| Network (Hex) | 0x0A000064 |
| Broadcast (Hex) | 0x0A000067 |
| Governing RFC | RFC 1918 |
| Address Type | Private (RFC 1918) |
Binary Representation
Network Address
00001010.00000000.00000000
00001010.00000000.00000000.01100100
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
10.0.0.100
net
10.0.0.101
10.0.0.102
10.0.0.103
bcast
/30 Subnet Reference
Total IPs
4
Usable Hosts
2
Subnet Mask
255.255.255.252
Wildcard
0.0.0.3