IPRangeExplorer

224.0.0.0/4

Multicast RFC 5771

224.0.0.0/4 is the IPv4 multicast address space, spanning 224.0.0.0 through 239.255.255.255. Multicast allows a single packet to be delivered to a group of interested receivers simultaneously.

Network Address
224.0.0.0
Broadcast Address
239.255.255.255
Subnet Mask
240.0.0.0
Usable Hosts
268,435,454
First Usable IP
224.0.0.1
Last Usable IP
239.255.255.254
Total IPs
268,435,456
Prefix Length
/4

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 239.255.255.255 are delivered to every device in the subnet. Also reserved — not assignable.

Usable hosts — the 268,435,454 addresses between those two that you can assign to servers, VMs, or interfaces.

Subnet mask — 240.0.0.0 is the dotted-decimal equivalent of /4. Older tools and Cisco configs use this format instead of CIDR slash notation.

Full Details

CIDR Notation 224.0.0.0/4
Network Address 224.0.0.0
Broadcast Address 239.255.255.255
Subnet Mask 240.0.0.0
Wildcard Mask 15.255.255.255
Prefix Length /4
IP Address Class Class D (Multicast)
Total IP Addresses 268,435,456
Usable Host Addresses 268,435,454
First Usable IP 224.0.0.1
Last Usable IP 239.255.255.254
Network (Hex) 0xE0000000
Broadcast (Hex) 0xEFFFFFFF
Governing RFC RFC 5771
Address Type Multicast

Binary Representation

Network Address
111 11100000.00000000.00000000.00000000
Subnet Mask
11110000.00000000.00000000.00000000

The first 4 bits (1s in the mask) identify the network. The remaining 28 bits identify hosts within the network.

Split into Equal Subnets

Split 224.0.0.0/4 into 2 equal /5 subnets (134,217,726 usable hosts each).

# CIDR Network First Usable Last Usable Broadcast Hosts
1 224.0.0.0/5 224.0.0.0 224.0.0.1 231.255.255.254 231.255.255.255 134,217,726
2 232.0.0.0/5 232.0.0.0 232.0.0.1 239.255.255.254 239.255.255.255 134,217,726

Common Use Cases

  • → OSPF routing protocol (224.0.0.5, 224.0.0.6)
  • → mDNS / Bonjour (224.0.0.251)
  • → IGMP multicast group management
  • → Video streaming and IPTV
  • → PIM sparse mode routing

/4 Subnet Reference

Total IPs 268,435,456
Usable Hosts 268,435,454
Subnet Mask 240.0.0.0
Wildcard 15.255.255.255
Full /4 reference →

Related Ranges

Parent /3 block 224.0.0.0/3 Sibling /4 block 240.0.0.0/4

Adjacent Prefix Sizes

/2 1,073,741,822 hosts /3 536,870,910 hosts /4 268,435,454 hosts /5 134,217,726 hosts /6 67,108,862 hosts

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