11.28.143.0/27

Public

Class A — /27 prefix — 30 usable hosts

Network Address

11.28.143.0

Broadcast Address

11.28.143.31

Subnet Mask

255.255.255.224

Usable Hosts

First Usable IP

11.28.143.1

Last Usable IP

11.28.143.30

Total IPs

Prefix Length

/27

Network address — the base address of the block (11.28.143.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 11.28.143.31 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	11.28.143.0/27
Network Address	11.28.143.0
Broadcast Address	11.28.143.31
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	11.28.143.1
Last Usable IP	11.28.143.30
Network (Hex)	0x0B1C8F00
Broadcast (Hex)	0x0B1C8F1F
Address Type	Public / Globally Routable

Binary Representation

Network Address

00001011.00011100.10001111 00001011.00011100.10001111.00000000

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 11.28.143.0/27 into 2 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	11.28.143.0/28	11.28.143.0	11.28.143.1	11.28.143.14	11.28.143.15	14
2	11.28.143.16/28	11.28.143.16	11.28.143.17	11.28.143.30	11.28.143.31	14

Split 11.28.143.0/27 into 4 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	11.28.143.0/29	11.28.143.0	11.28.143.1	11.28.143.6	11.28.143.7	6
2	11.28.143.8/29	11.28.143.8	11.28.143.9	11.28.143.14	11.28.143.15	6
3	11.28.143.16/29	11.28.143.16	11.28.143.17	11.28.143.22	11.28.143.23	6
4	11.28.143.24/29	11.28.143.24	11.28.143.25	11.28.143.30	11.28.143.31	6

Split 11.28.143.0/27 into 8 equal /30 subnets (2 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	11.28.143.0/30	11.28.143.0	11.28.143.1	11.28.143.2	11.28.143.3	2
2	11.28.143.4/30	11.28.143.4	11.28.143.5	11.28.143.6	11.28.143.7	2
3	11.28.143.8/30	11.28.143.8	11.28.143.9	11.28.143.10	11.28.143.11	2
4	11.28.143.12/30	11.28.143.12	11.28.143.13	11.28.143.14	11.28.143.15	2
5	11.28.143.16/30	11.28.143.16	11.28.143.17	11.28.143.18	11.28.143.19	2
6	11.28.143.20/30	11.28.143.20	11.28.143.21	11.28.143.22	11.28.143.23	2
7	11.28.143.24/30	11.28.143.24	11.28.143.25	11.28.143.26	11.28.143.27	2
8	11.28.143.28/30	11.28.143.28	11.28.143.29	11.28.143.30	11.28.143.31	2

IP Address Sample

Showing first 16 of 32 total IPs.

11.28.143.0 net

11.28.143.1

11.28.143.2

11.28.143.3

11.28.143.4

11.28.143.5

11.28.143.6

11.28.143.7

11.28.143.8

11.28.143.9

11.28.143.10

11.28.143.11

11.28.143.12

11.28.143.13

11.28.143.14

11.28.143.15

… 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 11.28.143.0/26 Sibling /27 block 11.28.143.32/27

Adjacent Prefix Sizes

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