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 contiguous /7 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) | 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 | 47.0.0.0 – 47.255.255.255 |
| Prudential Securities Inc. | 48.0.0.0 – 48.255.255.255 |
| Department for Work and Pensions of UK | 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 (Mercedes-Benz) | 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
