64.252.138.64/27

Public

Class A — /27 prefix — 30 usable hosts

Network Address
64.252.138.64
Broadcast Address
64.252.138.95
Subnet Mask
255.255.255.224
Usable Hosts
30
First Usable IP
64.252.138.65
Last Usable IP
64.252.138.94
Total IPs
32
Prefix Length
/27

Network address — the base address of the block (64.252.138.64). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 64.252.138.95 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 64.252.138.64/27
Network Address 64.252.138.64
Broadcast Address 64.252.138.95
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 64.252.138.65
Last Usable IP 64.252.138.94
Network (Hex) 0x40FC8A40
Broadcast (Hex) 0x40FC8A5F
Address Type Public / Globally Routable

Binary Representation

Network Address
01000000.11111100.10001010 01000000.11111100.10001010.01000000
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 64.252.138.64/27 into 2 equal /28 subnets (14 usable hosts each).

# CIDR Network First Usable Last Usable Broadcast Hosts
1 64.252.138.64/28 64.252.138.64 64.252.138.65 64.252.138.78 64.252.138.79 14
2 64.252.138.80/28 64.252.138.80 64.252.138.81 64.252.138.94 64.252.138.95 14

IP Address Sample

Showing first 16 of 32 total IPs.

64.252.138.64 net
64.252.138.65
64.252.138.66
64.252.138.67
64.252.138.68
64.252.138.69
64.252.138.70
64.252.138.71
64.252.138.72
64.252.138.73
64.252.138.74
64.252.138.75
64.252.138.76
64.252.138.77
64.252.138.78
64.252.138.79
… 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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