IPRangeExplorer

203.16.0.0/13

Public

Class C — /13 prefix — 524,286 usable hosts

Network Address
203.16.0.0
Broadcast Address
203.23.255.255
Subnet Mask
255.248.0.0
Usable Hosts
524,286
First Usable IP
203.16.0.1
Last Usable IP
203.23.255.254
Total IPs
524,288
Prefix Length
/13

Network address — the base address of the block (203.16.0.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 203.23.255.255 are delivered to every device in the subnet. Also reserved — not assignable.

Usable hosts — the 524,286 addresses between those two that you can assign to servers, VMs, or interfaces.

Subnet mask — 255.248.0.0 is the dotted-decimal equivalent of /13. Older tools and Cisco configs use this format instead of CIDR slash notation.

Full Details

CIDR Notation 203.16.0.0/13
Network Address 203.16.0.0
Broadcast Address 203.23.255.255
Subnet Mask 255.248.0.0
Wildcard Mask 0.7.255.255
Prefix Length /13
IP Address Class Class C
Total IP Addresses 524,288
Usable Host Addresses 524,286
First Usable IP 203.16.0.1
Last Usable IP 203.23.255.254
Network (Hex) 0xCB100000
Broadcast (Hex) 0xCB17FFFF
Address Type Public / Globally Routable

Binary Representation

Network Address
11001011 11001011.00010000.00000000.00000000
Subnet Mask
11111111.11111000.00000000.00000000

The first 13 bits (1s in the mask) identify the network. The remaining 19 bits identify hosts within the network.

Split into Equal Subnets

Split 203.16.0.0/13 into 2 equal /14 subnets (262,142 usable hosts each).

# CIDR Network First Usable Last Usable Broadcast Hosts
1 203.16.0.0/14 203.16.0.0 203.16.0.1 203.19.255.254 203.19.255.255 262,142
2 203.20.0.0/14 203.20.0.0 203.20.0.1 203.23.255.254 203.23.255.255 262,142

/13 Subnet Reference

Total IPs 524,288
Usable Hosts 524,286
Subnet Mask 255.248.0.0
Wildcard 0.7.255.255
Full /13 reference →

Related Ranges

Parent /12 block 203.16.0.0/12 Sibling /13 block 203.24.0.0/13

Adjacent Prefix Sizes

/11 2,097,150 hosts /12 1,048,574 hosts /13 524,286 hosts /14 262,142 hosts /15 131,070 hosts

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