IPRangeExplorer

118.248.8.0/21

Public

Class A — /21 prefix — 2,046 usable hosts

Network Address
118.248.8.0
Broadcast Address
118.248.15.255
Subnet Mask
255.255.248.0
Usable Hosts
2,046
First Usable IP
118.248.8.1
Last Usable IP
118.248.15.254
Total IPs
2,048
Prefix Length
/21

Network address — the base address of the block (118.248.8.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 118.248.15.255 are delivered to every device in the subnet. Also reserved — not assignable.

Usable hosts — the 2,046 addresses between those two that you can assign to servers, VMs, or interfaces.

Subnet mask — 255.255.248.0 is the dotted-decimal equivalent of /21. Older tools and Cisco configs use this format instead of CIDR slash notation.

Full Details

CIDR Notation 118.248.8.0/21
Network Address 118.248.8.0
Broadcast Address 118.248.15.255
Subnet Mask 255.255.248.0
Wildcard Mask 0.0.7.255
Prefix Length /21
IP Address Class Class A
Total IP Addresses 2,048
Usable Host Addresses 2,046
First Usable IP 118.248.8.1
Last Usable IP 118.248.15.254
Network (Hex) 0x76F80800
Broadcast (Hex) 0x76F80FFF
Address Type Public / Globally Routable

Binary Representation

Network Address
01110110.11111000 01110110.11111000.00001000.00000000
Subnet Mask
11111111.11111111.11111000.00000000

The first 21 bits (1s in the mask) identify the network. The remaining 11 bits identify hosts within the network.

Split into Equal Subnets

Split 118.248.8.0/21 into 2 equal /22 subnets (1,022 usable hosts each).

# CIDR Network First Usable Last Usable Broadcast Hosts
1 118.248.8.0/22 118.248.8.0 118.248.8.1 118.248.11.254 118.248.11.255 1,022
2 118.248.12.0/22 118.248.12.0 118.248.12.1 118.248.15.254 118.248.15.255 1,022

/21 Subnet Reference

Total IPs 2,048
Usable Hosts 2,046
Subnet Mask 255.255.248.0
Wildcard 0.0.7.255
Full /21 reference →

Related Ranges

Parent /20 block 118.248.0.0/20 Sibling /21 block 118.248.0.0/21

Adjacent Prefix Sizes

/19 8,190 hosts /20 4,094 hosts /21 2,046 hosts /22 1,022 hosts /23 510 hosts

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