16.18.89.224/28

Public

Class A — /28 prefix — 14 usable hosts

Network Address

16.18.89.224

Broadcast Address

16.18.89.239

Subnet Mask

255.255.255.240

Usable Hosts

First Usable IP

16.18.89.225

Last Usable IP

16.18.89.238

Total IPs

Prefix Length

/28

Network address — the base address of the block (16.18.89.224). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 16.18.89.239 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	16.18.89.224/28
Network Address	16.18.89.224
Broadcast Address	16.18.89.239
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	16.18.89.225
Last Usable IP	16.18.89.238
Network (Hex)	0x101259E0
Broadcast (Hex)	0x101259EF
Address Type	Public / Globally Routable

Binary Representation

Network Address

00010000.00010010.01011001 00010000.00010010.01011001.11100000

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 16.18.89.224/28 into 2 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	16.18.89.224/29	16.18.89.224	16.18.89.225	16.18.89.230	16.18.89.231	6
2	16.18.89.232/29	16.18.89.232	16.18.89.233	16.18.89.238	16.18.89.239	6

Split 16.18.89.224/28 into 4 equal /30 subnets (2 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	16.18.89.224/30	16.18.89.224	16.18.89.225	16.18.89.226	16.18.89.227	2
2	16.18.89.228/30	16.18.89.228	16.18.89.229	16.18.89.230	16.18.89.231	2
3	16.18.89.232/30	16.18.89.232	16.18.89.233	16.18.89.234	16.18.89.235	2
4	16.18.89.236/30	16.18.89.236	16.18.89.237	16.18.89.238	16.18.89.239	2

All 16 IP Addresses in this Range

16.18.89.224 net

16.18.89.225

16.18.89.226

16.18.89.227

16.18.89.228

16.18.89.229

16.18.89.230

16.18.89.231

16.18.89.232

16.18.89.233

16.18.89.234

16.18.89.235

16.18.89.236

16.18.89.237

16.18.89.238

16.18.89.239 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 16.18.89.224/27 Sibling /28 block 16.18.89.240/28

Adjacent Prefix Sizes

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