100.75.173.0/27

Public

Class A — /27 prefix — 30 usable hosts

Network Address
100.75.173.0
Broadcast Address
100.75.173.31
Subnet Mask
255.255.255.224
Usable Hosts
30
First Usable IP
100.75.173.1
Last Usable IP
100.75.173.30
Total IPs
32
Prefix Length
/27

Network address — the base address of the block (100.75.173.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 100.75.173.31 are delivered to every device in the subnet. Also reserved — not assignable.

Usable hosts — the 30 addresses between those two that you can assign to servers, VMs, or interfaces.

Subnet mask255.255.255.224 is the dotted-decimal equivalent of /27. Older tools and Cisco configs use this format instead of CIDR slash notation.

Full Details

CIDR Notation 100.75.173.0/27
Network Address 100.75.173.0
Broadcast Address 100.75.173.31
Subnet Mask 255.255.255.224
Wildcard Mask 0.0.0.31
Prefix Length /27
IP Address Class Class A
Total IP Addresses 32
Usable Host Addresses 30
First Usable IP 100.75.173.1
Last Usable IP 100.75.173.30
Network (Hex) 0x644BAD00
Broadcast (Hex) 0x644BAD1F
Address Type Public / Globally Routable

Binary Representation

Network Address
01100100.01001011.10101101 01100100.01001011.10101101.00000000
Subnet Mask
11111111.11111111.11111111.11100000

The first 27 bits (1s in the mask) identify the network. The remaining 5 bits identify hosts within the network.

Split into Equal Subnets

Split 100.75.173.0/27 into 2 equal /28 subnets (14 usable hosts each).

# CIDR Network First Usable Last Usable Broadcast Hosts
1 100.75.173.0/28 100.75.173.0 100.75.173.1 100.75.173.14 100.75.173.15 14
2 100.75.173.16/28 100.75.173.16 100.75.173.17 100.75.173.30 100.75.173.31 14

IP Address Sample

Showing first 16 of 32 total IPs.

100.75.173.0 net
100.75.173.1
100.75.173.2
100.75.173.3
100.75.173.4
100.75.173.5
100.75.173.6
100.75.173.7
100.75.173.8
100.75.173.9
100.75.173.10
100.75.173.11
100.75.173.12
100.75.173.13
100.75.173.14
100.75.173.15
… 16 more IPs …

/27 Subnet Reference

Total IPs 32
Usable Hosts 30
Subnet Mask 255.255.255.224
Wildcard 0.0.0.31

Calculate Another