11.31.131.112/28

Public

Class A — /28 prefix — 14 usable hosts

Network Address

11.31.131.112

Broadcast Address

11.31.131.127

Subnet Mask

255.255.255.240

Usable Hosts

First Usable IP

11.31.131.113

Last Usable IP

11.31.131.126

Total IPs

Prefix Length

/28

Network address — the base address of the block (11.31.131.112). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 11.31.131.127 are delivered to every device in the subnet. Also reserved — not assignable.

Usable hosts — the 14 addresses between those two that you can assign to servers, VMs, or interfaces.

Subnet mask — 255.255.255.240 is the dotted-decimal equivalent of /28. Older tools and Cisco configs use this format instead of CIDR slash notation.

Full Details

CIDR Notation	11.31.131.112/28
Network Address	11.31.131.112
Broadcast Address	11.31.131.127
Subnet Mask	255.255.255.240
Wildcard Mask	0.0.0.15
Prefix Length	/28
IP Address Class	Class A
Total IP Addresses	16
Usable Host Addresses	14
First Usable IP	11.31.131.113
Last Usable IP	11.31.131.126
Network (Hex)	0x0B1F8370
Broadcast (Hex)	0x0B1F837F
Address Type	Public / Globally Routable

Binary Representation

Network Address

00001011.00011111.10000011 00001011.00011111.10000011.01110000

Subnet Mask

11111111.11111111.11111111.11110000

The first 28 bits (1s in the mask) identify the network. The remaining 4 bits identify hosts within the network.

Split into Equal Subnets

Split 11.31.131.112/28 into 2 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	11.31.131.112/29	11.31.131.112	11.31.131.113	11.31.131.118	11.31.131.119	6
2	11.31.131.120/29	11.31.131.120	11.31.131.121	11.31.131.126	11.31.131.127	6

Split 11.31.131.112/28 into 4 equal /30 subnets (2 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	11.31.131.112/30	11.31.131.112	11.31.131.113	11.31.131.114	11.31.131.115	2
2	11.31.131.116/30	11.31.131.116	11.31.131.117	11.31.131.118	11.31.131.119	2
3	11.31.131.120/30	11.31.131.120	11.31.131.121	11.31.131.122	11.31.131.123	2
4	11.31.131.124/30	11.31.131.124	11.31.131.125	11.31.131.126	11.31.131.127	2

All 16 IP Addresses in this Range

11.31.131.112 net

11.31.131.113

11.31.131.114

11.31.131.115

11.31.131.116

11.31.131.117

11.31.131.118

11.31.131.119

11.31.131.120

11.31.131.121

11.31.131.122

11.31.131.123

11.31.131.124

11.31.131.125

11.31.131.126

11.31.131.127 bcast

/28 Subnet Reference

Total IPs 16

Usable Hosts 14

Subnet Mask 255.255.255.240

Wildcard 0.0.0.15

Full /28 reference →

Related Ranges

Parent /27 block 11.31.131.96/27 Sibling /28 block 11.31.131.96/28

Adjacent Prefix Sizes

/26 62 hosts /27 30 hosts /28 14 hosts /29 6 hosts /30 2 hosts