IPRangeExplorer

187.240.0.0/13

Public

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

Network Address
187.240.0.0
Broadcast Address
187.247.255.255
Subnet Mask
255.248.0.0
Usable Hosts
524,286
First Usable IP
187.240.0.1
Last Usable IP
187.247.255.254
Total IPs
524,288
Prefix Length
/13

Network address — the base address of the block (187.240.0.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 187.247.255.255 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 187.240.0.0/13
Network Address 187.240.0.0
Broadcast Address 187.247.255.255
Subnet Mask 255.248.0.0
Wildcard Mask 0.7.255.255
Prefix Length /13
IP Address Class Class B
Total IP Addresses 524,288
Usable Host Addresses 524,286
First Usable IP 187.240.0.1
Last Usable IP 187.247.255.254
Network (Hex) 0xBBF00000
Broadcast (Hex) 0xBBF7FFFF
Address Type Public / Globally Routable

Binary Representation

Network Address
10111011 10111011.11110000.00000000.00000000
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 187.240.0.0/13 into 2 equal /14 subnets (262,142 usable hosts each).

# CIDR Network First Usable Last Usable Broadcast Hosts
1 187.240.0.0/14 187.240.0.0 187.240.0.1 187.243.255.254 187.243.255.255 262,142
2 187.244.0.0/14 187.244.0.0 187.244.0.1 187.247.255.254 187.247.255.255 262,142

/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 187.240.0.0/12 Sibling /13 block 187.248.0.0/13

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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