IPRangeExplorer

224.0.0.0/9

Multicast RFC 5771

Class D (Multicast) — /9 prefix — 8,388,606 usable hosts

Network Address
224.0.0.0
Broadcast Address
224.127.255.255
Subnet Mask
255.128.0.0
Usable Hosts
8,388,606
First Usable IP
224.0.0.1
Last Usable IP
224.127.255.254
Total IPs
8,388,608
Prefix Length
/9

Network address — the base address of the block (224.0.0.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 224.127.255.255 are delivered to every device in the subnet. Also reserved — not assignable.

Usable hosts — the 8,388,606 addresses between those two that you can assign to servers, VMs, or interfaces.

Subnet mask — 255.128.0.0 is the dotted-decimal equivalent of /9. Older tools and Cisco configs use this format instead of CIDR slash notation.

Full Details

CIDR Notation 224.0.0.0/9
Network Address 224.0.0.0
Broadcast Address 224.127.255.255
Subnet Mask 255.128.0.0
Wildcard Mask 0.127.255.255
Prefix Length /9
IP Address Class Class D (Multicast)
Total IP Addresses 8,388,608
Usable Host Addresses 8,388,606
First Usable IP 224.0.0.1
Last Usable IP 224.127.255.254
Network (Hex) 0xE0000000
Broadcast (Hex) 0xE07FFFFF
Governing RFC RFC 5771
Address Type Multicast

Binary Representation

Network Address
11100000 11100000.00000000.00000000.00000000
Subnet Mask
11111111.10000000.00000000.00000000

The first 9 bits (1s in the mask) identify the network. The remaining 23 bits identify hosts within the network.

Split into Equal Subnets

Split 224.0.0.0/9 into 2 equal /10 subnets (4,194,302 usable hosts each).

# CIDR Network First Usable Last Usable Broadcast Hosts
1 224.0.0.0/10 224.0.0.0 224.0.0.1 224.63.255.254 224.63.255.255 4,194,302
2 224.64.0.0/10 224.64.0.0 224.64.0.1 224.127.255.254 224.127.255.255 4,194,302

/9 Subnet Reference

Total IPs 8,388,608
Usable Hosts 8,388,606
Subnet Mask 255.128.0.0
Wildcard 0.127.255.255
Full /9 reference →

Related Ranges

Parent /8 block 224.0.0.0/8 Sibling /9 block 224.128.0.0/9

Adjacent Prefix Sizes

/7 33,554,430 hosts /8 16,777,214 hosts /9 8,388,606 hosts /10 4,194,302 hosts /11 2,097,150 hosts

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