67
Class
Address Range
Supports
Class A
1.0.0.1 to 126.255.255.254
Supports 16 million hosts on each of 127
networks.
Class B
128.1.0.1 to 191.255.255.254
Supports 65,000 hosts on each of 16,000
networks.
Class C
192.0.1.1 to 223.255.254.254
Supports 254 hosts on each of 2 million
networks.
Class D
224.0.0.0 to 239.255.255.255
Reserved for multicast groups.
Class E
240.0.0.0 to 254.255.255.254
Reserved for future use, or Research and
Development Purposes.
IP multicast
address
Description
224.0.0.0
Base address (reserved)
224.0.0.1
The All Hosts multicast group that contains all systems on the same network
segment
224.0.0.2
The All Routers multicast group that contains all routers on the same network
segment
224.0.0.5
The Open Shortest Path First (OSPF) AllSPFRouters address. Used to send
Hello packets to all OSPF routers on a network segment
224.0.0.6
The OSPF AllDRouters address. Used to send OSPF routing information to
OSPF designated routers on a network segment
224.0.0.9
The RIP version 2 group address, used to send routing information using the
RIP protocol to all RIP v2-aware routers on a network segment
224.0.0.10
EIGRP group address. Used to send EIGRP routing information to all EIGRP
routers on a network segment
