100.62.17.64/27

Public

Class A — /27 prefix — 30 usable hosts

Network Address
100.62.17.64
Broadcast Address
100.62.17.95
Subnet Mask
255.255.255.224
Usable Hosts
30
First Usable IP
100.62.17.65
Last Usable IP
100.62.17.94
Total IPs
32
Prefix Length
/27

Network address — the base address of the block (100.62.17.64). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 100.62.17.95 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 100.62.17.64/27
Network Address 100.62.17.64
Broadcast Address 100.62.17.95
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 100.62.17.65
Last Usable IP 100.62.17.94
Network (Hex) 0x643E1140
Broadcast (Hex) 0x643E115F
Address Type Public / Globally Routable

Binary Representation

Network Address
01100100.00111110.00010001 01100100.00111110.00010001.01000000
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 100.62.17.64/27 into 2 equal /28 subnets (14 usable hosts each).

# CIDR Network First Usable Last Usable Broadcast Hosts
1 100.62.17.64/28 100.62.17.64 100.62.17.65 100.62.17.78 100.62.17.79 14
2 100.62.17.80/28 100.62.17.80 100.62.17.81 100.62.17.94 100.62.17.95 14

IP Address Sample

Showing first 16 of 32 total IPs.

100.62.17.64 net
100.62.17.65
100.62.17.66
100.62.17.67
100.62.17.68
100.62.17.69
100.62.17.70
100.62.17.71
100.62.17.72
100.62.17.73
100.62.17.74
100.62.17.75
100.62.17.76
100.62.17.77
100.62.17.78
100.62.17.79
… 16 more IPs …

/27 Subnet Reference

Total IPs 32
Usable Hosts 30
Subnet Mask 255.255.255.224
Wildcard 0.0.0.31

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