List of assigned /8 IP address blocks
From Wikipedia, the free encyclopedia
Some large /8 blocks (formerly constituting a "Class A network") of IP addresses are assigned to single organizations or related groups of organizations, either by the Internet Corporation for Assigned Names and Numbers (ICANN), through the Internet Assigned Numbers Authority[1], or a regional Internet registry.
Each /8 block has 16,777,214 addresses. Some organizations, such as Stanford University (formerly owner of the 36.0.0.0 – 36.255.255.255 range), have returned their designated ranges due to IP address shortages in recent years. Note that some of these allocations are actually twice as large, and can be considered /7 networks formed through contiguous /8 networks.; such instances are marked in bold.
[edit] List of assigned /8 blocks
| Organization | Block |
|---|---|
| General Electric | 3.0.0.0 – 3.255.255.255 |
| Level 3 Communications (originally BBN, then GTE, then Genuity) | 4.0.0.0 – 4.255.255.255 |
| United States Department of Defense Network Information Center | 6.0.0.0 – 7.255.255.255 |
| Level 3 Communications (originally BBN) | 8.0.0.0 – 8.255.255.255 |
| IBM | 9.0.0.0 – 9.255.255.255 |
| (reserved for RFC1918 usage) | 10.0.0.0 – 10.255.255.255 |
| United States Department of Defense Network Information Center | 11.0.0.0 – 11.255.255.255 |
| AT&T WorldNet Services | 12.0.0.0 – 12.255.255.255 |
| Xerox Palo Alto Research Center | 13.0.0.0 – 13.255.255.255 |
| Hewlett-Packard | 15.0.0.0 – 15.255.255.255 |
| Hewlett-Packard (originally DEC, then Compaq) | 16.0.0.0 – 16.255.255.255 |
| Apple Inc. | 17.0.0.0 – 17.255.255.255 |
| Massachusetts Institute of Technology | 18.0.0.0 – 18.255.255.255 |
| Ford Motor Company | 19.0.0.0 – 19.255.255.255 |
| Computer Sciences Corporation | 20.0.0.0 – 20.255.255.255 |
| United States Department of Defense Network Information Center | 21.0.0.0 – 21.255.255.255 |
| United States Department of Defense Network Information Center | 22.0.0.0 – 22.255.255.255 |
| Various U.S. Cable Networks | 24.0.0.0 – 24.255.255.255 |
| Royal Signals and Radar Establishment | 25.0.0.0 – 25.255.255.255 |
| United States Department of Defense Network Information Center | 26.0.0.0 – 26.255.255.255 |
| United States Department of Defense Network Information Center | 28.0.0.0 – 29.255.255.255 |
| United States Department of Defense Network Information Center | 30.0.0.0 – 30.255.255.255 |
| AT&T Global Network Services | 32.0.0.0 – 32.255.255.255 |
| United States Department of Defense Network Information Center | 33.0.0.0 – 33.255.255.255 |
| Halliburton Company | 34.0.0.0 – 34.255.255.255 |
| Merit Network, Inc. | 35.0.0.0 – 35.255.255.255 |
| Performance Systems International | 38.0.0.0 – 38.255.255.255 |
| Eli Lilly and Company | 40.0.0.0 – 40.255.255.255 |
| Amateur Radio Digital Communications | 44.0.0.0 – 44.255.255.255 |
| Interop Show Network | 45.0.0.0 – 45.255.255.255 |
| Bell-Northern Research (now a unit of Nortel) | 47.0.0.0 – 47.255.255.255 |
| Prudential Securities Inc. | 48.0.0.0 – 48.255.255.255 |
| UK Department for Work and Pensions | 51.0.0.0 – 51.255.255.255 |
| E.I. DuPont de Nemours and Co., Inc. | 52.0.0.0 – 52.255.255.255 |
| Cap debis ccs (Daimler AG) | 53.0.0.0 – 53.255.255.255 |
| Merck and Co., Inc. | 54.0.0.0 – 54.255.255.255 |
| United States Department of Defense Network Information Center | 55.0.0.0 – 55.255.255.255 |
| United States Postal Service | 56.0.0.0 – 56.255.255.255 |
| SITA - Société Internationale De Telecommunications Aeronautiques | 57.0.0.0 – 57.255.255.255 |
Note that this list does not include any assignments of /8 blocks by the regional registries such as RIPE NCC, ARIN, APNIC, AfriNIC, LACNIC, JPNIC etc, which includes most of the later blocks, including 64/8 et al.
[edit] References
- ^ The authoritative up-to-date list of IANA assignments can be found on this IANA page
