100.122.152.64/27

Public

Class A — /27 prefix — 30 usable hosts

Network Address

100.122.152.64

Broadcast Address

100.122.152.95

Subnet Mask

255.255.255.224

Usable Hosts

First Usable IP

100.122.152.65

Last Usable IP

100.122.152.94

Total IPs

Prefix Length

/27

Network address — the base address of the block (100.122.152.64). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 100.122.152.95 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 mask — 255.255.255.224 is the dotted-decimal equivalent of /27. Older tools and Cisco configs use this format instead of CIDR slash notation.

Full Details

CIDR Notation	100.122.152.64/27
Network Address	100.122.152.64
Broadcast Address	100.122.152.95
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	100.122.152.65
Last Usable IP	100.122.152.94
Network (Hex)	0x647A9840
Broadcast (Hex)	0x647A985F
Address Type	Public / Globally Routable

Binary Representation

Network Address

01100100.01111010.10011000 01100100.01111010.10011000.01000000

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 100.122.152.64/27 into 2 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	100.122.152.64/28	100.122.152.64	100.122.152.65	100.122.152.78	100.122.152.79	14
2	100.122.152.80/28	100.122.152.80	100.122.152.81	100.122.152.94	100.122.152.95	14

Split 100.122.152.64/27 into 4 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	100.122.152.64/29	100.122.152.64	100.122.152.65	100.122.152.70	100.122.152.71	6
2	100.122.152.72/29	100.122.152.72	100.122.152.73	100.122.152.78	100.122.152.79	6
3	100.122.152.80/29	100.122.152.80	100.122.152.81	100.122.152.86	100.122.152.87	6
4	100.122.152.88/29	100.122.152.88	100.122.152.89	100.122.152.94	100.122.152.95	6

Split 100.122.152.64/27 into 8 equal /30 subnets (2 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	100.122.152.64/30	100.122.152.64	100.122.152.65	100.122.152.66	100.122.152.67	2
2	100.122.152.68/30	100.122.152.68	100.122.152.69	100.122.152.70	100.122.152.71	2
3	100.122.152.72/30	100.122.152.72	100.122.152.73	100.122.152.74	100.122.152.75	2
4	100.122.152.76/30	100.122.152.76	100.122.152.77	100.122.152.78	100.122.152.79	2
5	100.122.152.80/30	100.122.152.80	100.122.152.81	100.122.152.82	100.122.152.83	2
6	100.122.152.84/30	100.122.152.84	100.122.152.85	100.122.152.86	100.122.152.87	2
7	100.122.152.88/30	100.122.152.88	100.122.152.89	100.122.152.90	100.122.152.91	2
8	100.122.152.92/30	100.122.152.92	100.122.152.93	100.122.152.94	100.122.152.95	2

IP Address Sample

Showing first 16 of 32 total IPs.

100.122.152.64 net

100.122.152.65

100.122.152.66

100.122.152.67

100.122.152.68

100.122.152.69

100.122.152.70

100.122.152.71

100.122.152.72

100.122.152.73

100.122.152.74

100.122.152.75

100.122.152.76

100.122.152.77

100.122.152.78

100.122.152.79

… 16 more IPs …

/27 Subnet Reference

Total IPs 32

Usable Hosts 30

Subnet Mask 255.255.255.224

Wildcard 0.0.0.31

Full /27 reference →

Related Ranges

Parent /26 block 100.122.152.64/26 Sibling /27 block 100.122.152.96/27

Adjacent Prefix Sizes

/25 126 hosts /26 62 hosts /27 30 hosts /28 14 hosts /29 6 hosts