Assigned Multicast Addresses
IP Multicast address are "Class D" address that range from
224.0.0.0 through 239.255.255.255. Only a few of them have
been officially assigned, as listed below. Some others are
not official but "well known":
- 224.2.0.1 - Default VAT (audio) address
- 224.2.1.1 - Default NV (video) address
- 224.2.127.255, Port 9876 - Session Directory (SD) address
- 224.8.8.8 - Default IVS (audio/video) address
- 224.2.253.119 - Radio Free VAT (subject to change?)
From RFC 1700, Assigned Numbers, October 1994.
INTERNET MULTICAST ADDRESSES
Host Extensions for IP Multicasting [RFC1112] specifies the
extensions required of a host implementation of the Internet Protocol
(IP) to support multicasting. Current addresses are listed below.
224.0.0.0 Base Address (Reserved) [RFC1112,JBP]
224.0.0.1 All Systems on this Subnet [RFC1112,JBP]
224.0.0.2 All Routers on this Subnet [JBP]
224.0.0.3 Unassigned [JBP]
224.0.0.4 DVMRP Routers [RFC1075,JBP]
224.0.0.5 OSPFIGP OSPFIGP All Routers [RFC1583,JXM1]
224.0.0.6 OSPFIGP OSPFIGP Designated Routers [RFC1583,JXM1]
224.0.0.7 ST Routers [RFC1190,KS14]
224.0.0.8 ST Hosts [RFC1190,KS14]
224.0.0.9 RIP2 Routers [GSM11]
224.0.0.10 IGRP Routers [Dino Farinacci]
224.0.0.11 Mobile-Agents [Bill Simpson]
224.0.0.12-224.0.0.255 Unassigned [JBP]
224.0.1.0 VMTP Managers Group [RFC1045,DRC3]
224.0.1.1 NTP Network Time Protocol [RFC1119,DLM1]
224.0.1.2 SGI-Dogfight [AXC]
224.0.1.3 Rwhod [SXD]
224.0.1.4 VNP [DRC3]
224.0.1.5 Artificial Horizons - Aviator [BXF]
224.0.1.6 NSS - Name Service Server [BXS2]
224.0.1.7 AUDIONEWS - Audio News Multicast [MXF2]
224.0.1.8 SUN NIS+ Information Service [CXM3]
224.0.1.9 MTP Multicast Transport Protocol [SXA]
224.0.1.10 IETF-1-LOW-AUDIO [SC3]
224.0.1.11 IETF-1-AUDIO [SC3]
224.0.1.12 IETF-1-VIDEO [SC3]
224.0.1.13 IETF-2-LOW-AUDIO [SC3]
224.0.1.14 IETF-2-AUDIO [SC3]
224.0.1.15 IETF-2-VIDEO [SC3]
224.0.1.16 MUSIC-SERVICE [Guido van Rossum]
224.0.1.17 SEANET-TELEMETRY [Andrew Maffei]
224.0.1.18 SEANET-IMAGE [Andrew Maffei]
224.0.1.19 MLOADD [Braden]
224.0.1.20 any private experiment [JBP]
224.0.1.21 DVMRP on MOSPF [John Moy]
224.0.1.22 SVRLOC
224.0.1.23 XINGTV
224.0.1.24 microsoft-ds
224.0.1.25 nbc-pro
224.0.1.26 nbc-pfn
224.0.1.27-224.0.1.255 Unassigned [JBP]
224.0.2.1 "rwho" Group (BSD) (unofficial) [JBP]
224.0.2.2 SUN RPC PMAPPROC_CALLIT [BXE1]
224.0.3.000-224.0.3.255 RFE Generic Service [DXS3]
224.0.4.000-224.0.4.255 RFE Individual Conferences [DXS3]
224.0.5.000-224.0.5.127 CDPD Groups [Bob Brenner]
224.0.5.128-224.0.5.255 Unassigned [IANA]
224.0.6.000-224.0.6.127 Cornell ISIS Project [Tim Clark]
224.0.6.128-224.0.6.255 Unassigned [IANA]
224.1.0.0-224.1.255.255 ST Multicast Groups [RFC1190,KS14]
224.2.0.0-224.2.255.255 Multimedia Conference Calls [SC3]
224.252.0.0-224.255.255.255 DIS transient groups [Joel Snyder]
232.0.0.0-232.255.255.255 VMTP transient groups [RFC1045,DRC3]
These addresses are listed in the Domain Name Service under MCAST.NET
and 224.IN-ADDR.ARPA.
Note that when used on an Ethernet or IEEE 802 network, the 23
low-order bits of the IP Multicast address are placed in the low-order
23 bits of the Ethernet or IEEE 802 net multicast address
1.0.94.0.0.0. See the next section on "IANA ETHERNET ADDRESS BLOCK".
REFERENCES
[RFC1045] Cheriton, D., "VMTP: Versatile Message Transaction
Protocol Specification", RFC 1045, Stanford University,
February 1988.
[RFC1075] Waitzman, D., C. Partridge, and S. Deering "Distance Vector
Multicast Routing Protocol", RFC-1075, BBN STC, Stanford
University, November 1988.
[RFC1112] Deering, S., "Host Extensions for IP Multicasting",
STD 5, RFC 1112, Stanford University, August 1989.
[RFC1119] Mills, D., "Network Time Protocol (Version 1), Specification
and Implementation", STD 12, RFC 1119, University of
Delaware, July 1988.
[RFC1190] Topolcic, C., Editor, "Experimental Internet Stream
Protocol, Version 2 (ST-II)", RFC 1190, CIP Working Group,
October 1990.
[RFC1583] Moy, J., "The OSPF Specification", RFC 1583, Proteon,
March 1994.
Original Source
P. Dykstra, phil@arl.mil, 27 Oct 94