224.0.0.0 - 224.0.0.255
Local Network Control Block
224.0.1.0 - 224.0.1.255
Internetwork Control Block
224.0.0.1
All Subnet Hosts/All-Hosts Group
224.0.0.2
All routers in this subnet
224.0.0.5
All OSPF Routers
224.0.0.6
All OSPF DRs
224.0.0.9
All RIPv2 routers
224.0.0.10
All EIGRP Routers
224.0.0.13
All PIM routers
224.0.0.18
VRRP
224.0.0.22
IGMPv3
224.0.0.102
HSRPv2 & GLBP
224.0.1.1
NTP
224.0.1.39
Cisco RP Announce (Auto-RP)
224.0.1.40
Cisco RP Discovery (Auto-RP)
01:00:5E
First 24 bits of multicast MAC