11.18.148.128/28

Public

Class A — /28 prefix — 14 usable hosts

Network Address

11.18.148.128

Broadcast Address

11.18.148.143

Subnet Mask

255.255.255.240

Usable Hosts

First Usable IP

11.18.148.129

Last Usable IP

11.18.148.142

Total IPs

Prefix Length

/28

Network address — the base address of the block (11.18.148.128). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 11.18.148.143 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	11.18.148.128/28
Network Address	11.18.148.128
Broadcast Address	11.18.148.143
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	11.18.148.129
Last Usable IP	11.18.148.142
Network (Hex)	0x0B129480
Broadcast (Hex)	0x0B12948F
Address Type	Public / Globally Routable

Binary Representation

Network Address

00001011.00010010.10010100 00001011.00010010.10010100.10000000

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 11.18.148.128/28 into 2 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	11.18.148.128/29	11.18.148.128	11.18.148.129	11.18.148.134	11.18.148.135	6
2	11.18.148.136/29	11.18.148.136	11.18.148.137	11.18.148.142	11.18.148.143	6

Split 11.18.148.128/28 into 4 equal /30 subnets (2 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	11.18.148.128/30	11.18.148.128	11.18.148.129	11.18.148.130	11.18.148.131	2
2	11.18.148.132/30	11.18.148.132	11.18.148.133	11.18.148.134	11.18.148.135	2
3	11.18.148.136/30	11.18.148.136	11.18.148.137	11.18.148.138	11.18.148.139	2
4	11.18.148.140/30	11.18.148.140	11.18.148.141	11.18.148.142	11.18.148.143	2

All 16 IP Addresses in this Range

11.18.148.128 net

11.18.148.129

11.18.148.130

11.18.148.131

11.18.148.132

11.18.148.133

11.18.148.134

11.18.148.135

11.18.148.136

11.18.148.137

11.18.148.138

11.18.148.139

11.18.148.140

11.18.148.141

11.18.148.142

11.18.148.143 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 11.18.148.128/27 Sibling /28 block 11.18.148.144/28

Adjacent Prefix Sizes

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