11.211.91.64/27

Public

Class A — /27 prefix — 30 usable hosts

Network Address

11.211.91.64

Broadcast Address

11.211.91.95

Subnet Mask

255.255.255.224

Usable Hosts

First Usable IP

11.211.91.65

Last Usable IP

11.211.91.94

Total IPs

Prefix Length

/27

Network address — the base address of the block (11.211.91.64). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 11.211.91.95 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	11.211.91.64/27
Network Address	11.211.91.64
Broadcast Address	11.211.91.95
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	11.211.91.65
Last Usable IP	11.211.91.94
Network (Hex)	0x0BD35B40
Broadcast (Hex)	0x0BD35B5F
Address Type	Public / Globally Routable

Binary Representation

Network Address

00001011.11010011.01011011 00001011.11010011.01011011.01000000

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 11.211.91.64/27 into 2 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	11.211.91.64/28	11.211.91.64	11.211.91.65	11.211.91.78	11.211.91.79	14
2	11.211.91.80/28	11.211.91.80	11.211.91.81	11.211.91.94	11.211.91.95	14

Split 11.211.91.64/27 into 4 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	11.211.91.64/29	11.211.91.64	11.211.91.65	11.211.91.70	11.211.91.71	6
2	11.211.91.72/29	11.211.91.72	11.211.91.73	11.211.91.78	11.211.91.79	6
3	11.211.91.80/29	11.211.91.80	11.211.91.81	11.211.91.86	11.211.91.87	6
4	11.211.91.88/29	11.211.91.88	11.211.91.89	11.211.91.94	11.211.91.95	6

Split 11.211.91.64/27 into 8 equal /30 subnets (2 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	11.211.91.64/30	11.211.91.64	11.211.91.65	11.211.91.66	11.211.91.67	2
2	11.211.91.68/30	11.211.91.68	11.211.91.69	11.211.91.70	11.211.91.71	2
3	11.211.91.72/30	11.211.91.72	11.211.91.73	11.211.91.74	11.211.91.75	2
4	11.211.91.76/30	11.211.91.76	11.211.91.77	11.211.91.78	11.211.91.79	2
5	11.211.91.80/30	11.211.91.80	11.211.91.81	11.211.91.82	11.211.91.83	2
6	11.211.91.84/30	11.211.91.84	11.211.91.85	11.211.91.86	11.211.91.87	2
7	11.211.91.88/30	11.211.91.88	11.211.91.89	11.211.91.90	11.211.91.91	2
8	11.211.91.92/30	11.211.91.92	11.211.91.93	11.211.91.94	11.211.91.95	2

IP Address Sample

Showing first 16 of 32 total IPs.

11.211.91.64 net

11.211.91.65

11.211.91.66

11.211.91.67

11.211.91.68

11.211.91.69

11.211.91.70

11.211.91.71

11.211.91.72

11.211.91.73

11.211.91.74

11.211.91.75

11.211.91.76

11.211.91.77

11.211.91.78

11.211.91.79

… 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 11.211.91.64/26 Sibling /27 block 11.211.91.96/27

Adjacent Prefix Sizes

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