IPRangeExplorer

226.252.104.0/21

Multicast RFC 5771

Class D (Multicast) — /21 prefix — 2,046 usable hosts

Network Address
226.252.104.0
Broadcast Address
226.252.111.255
Subnet Mask
255.255.248.0
Usable Hosts
2,046
First Usable IP
226.252.104.1
Last Usable IP
226.252.111.254
Total IPs
2,048
Prefix Length
/21

Network address — the base address of the block (226.252.104.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 226.252.111.255 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 226.252.104.0/21
Network Address 226.252.104.0
Broadcast Address 226.252.111.255
Subnet Mask 255.255.248.0
Wildcard Mask 0.0.7.255
Prefix Length /21
IP Address Class Class D (Multicast)
Total IP Addresses 2,048
Usable Host Addresses 2,046
First Usable IP 226.252.104.1
Last Usable IP 226.252.111.254
Network (Hex) 0xE2FC6800
Broadcast (Hex) 0xE2FC6FFF
Governing RFC RFC 5771
Address Type Multicast

Binary Representation

Network Address
11100010.11111100 11100010.11111100.01101000.00000000
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 226.252.104.0/21 into 2 equal /22 subnets (1,022 usable hosts each).

# CIDR Network First Usable Last Usable Broadcast Hosts
1 226.252.104.0/22 226.252.104.0 226.252.104.1 226.252.107.254 226.252.107.255 1,022
2 226.252.108.0/22 226.252.108.0 226.252.108.1 226.252.111.254 226.252.111.255 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 226.252.96.0/20 Sibling /21 block 226.252.96.0/21

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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