IPRangeExplorer

16.0.0.0/4

Public

Class A — /4 prefix — 268,435,454 usable hosts

Network Address
16.0.0.0
Broadcast Address
31.255.255.255
Subnet Mask
240.0.0.0
Usable Hosts
268,435,454
First Usable IP
16.0.0.1
Last Usable IP
31.255.255.254
Total IPs
268,435,456
Prefix Length
/4

Network address — the base address of the block (16.0.0.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 31.255.255.255 are delivered to every device in the subnet. Also reserved — not assignable.

Usable hosts — the 268,435,454 addresses between those two that you can assign to servers, VMs, or interfaces.

Subnet mask — 240.0.0.0 is the dotted-decimal equivalent of /4. Older tools and Cisco configs use this format instead of CIDR slash notation.

Full Details

CIDR Notation 16.0.0.0/4
Network Address 16.0.0.0
Broadcast Address 31.255.255.255
Subnet Mask 240.0.0.0
Wildcard Mask 15.255.255.255
Prefix Length /4
IP Address Class Class A
Total IP Addresses 268,435,456
Usable Host Addresses 268,435,454
First Usable IP 16.0.0.1
Last Usable IP 31.255.255.254
Network (Hex) 0x10000000
Broadcast (Hex) 0x1FFFFFFF
Address Type Public / Globally Routable

Binary Representation

Network Address
000 00010000.00000000.00000000.00000000
Subnet Mask
11110000.00000000.00000000.00000000

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

Split into Equal Subnets

Split 16.0.0.0/4 into 2 equal /5 subnets (134,217,726 usable hosts each).

# CIDR Network First Usable Last Usable Broadcast Hosts
1 16.0.0.0/5 16.0.0.0 16.0.0.1 23.255.255.254 23.255.255.255 134,217,726
2 24.0.0.0/5 24.0.0.0 24.0.0.1 31.255.255.254 31.255.255.255 134,217,726

/4 Subnet Reference

Total IPs 268,435,456
Usable Hosts 268,435,454
Subnet Mask 240.0.0.0
Wildcard 15.255.255.255
Full /4 reference →

Related Ranges

Parent /3 block 0.0.0.0/3 Sibling /4 block 0.0.0.0/4

Adjacent Prefix Sizes

/2 1,073,741,822 hosts /3 536,870,910 hosts /4 268,435,454 hosts /5 134,217,726 hosts /6 67,108,862 hosts

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