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2.8: Detail - IP Addresses

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    Table 2.7 is an excerpt from IPv4, http://www.iana.org/assignments/ipv4-address-space (version 4, which is in the process of being phased out in favor of version 6). IP addresses are assigned by the Internet Assigned Numbers Authority (IANA), http://www.iana.org/.

    IANA is in charge of all “unique parameters” on the Internet, including IP (Internet Protocol) addresses. Each domain name is associated with a unique IP address, a numerical name consisiting of four blocks of up to three digits each, e.g. 204.146.46.8, which systems use to direct information through the network.

    Internet Protocol Address Space

    The allocation of Internet Protocol version 4 (IPv4) address space to various registries is listed here. Originally, all the IPv4 address spaces was managed directly by the IANA. Later, parts of the address space were allocated to various other registries to manage for particular purposes or regions of the world. RFC 1466 documents most of these allocations.

    Address Block   Date
    000/8   Sep 81
    001/8   Sep 81
    002/8   Sep 81
    003/8 General Electric Company May 94
    004/8 Bolt Beranek and Newman Inc. Dec 92
    005/8   Jul 95
    006/8 Army Information Systems Center Feb 94
    007/8   Apr 95
    008/8 Bolt Beranek and Newman Inc Dec 92
    009/8 IBM Aug 92
    010/8   Jun 95
    011/8 DoD Intel Information Systems May 93
    012/8 AT & T Bell Laboratories Jun 95
    013/8 Xerox Corporation Sep 91
    014/8   Jun 91
    015/8 Hewlett-Packard Company Jul 94
    016/8 Digital Equipment Corporation Nov 94
    017/8 Apple Computer Inc. Jul 92
    018/8 MIT Jan 94
    019/8 Ford Motor Company May 95
    020/8 Computer Sciences Corporation Oct 94
    021/8 DDN-RVN Jul 91
    022/8 Defense Information Systems Agency May 93
    023/8   Jul 95
    024/8   Jul 95
    025/8 Royal Signals and Radar Establishment Jan 95

    This page titled 2.8: Detail - IP Addresses is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Paul Penfield, Jr. (MIT OpenCourseWare) via source content that was edited to the style and standards of the LibreTexts platform; a detailed edit history is available upon request.