Silicon Graphics — 2 prefixes (MA-L)

Silicon Graphics, Inc. (SGI) was a Mountain View, California workstation and server maker, founded November 9, 1981, that defined a generation of high-performance 3D graphics and technical computing. Its IRIS, Indigo, Indy, O2, Octane, Origin, and Onyx systems — all running the IRIX flavor of Unix — carried onboard Ethernet interfaces built on SGI's own MAC allocations rather than merchant networking silicon sold to third parties. Two distinct MA-L (24-bit) OUI blocks are registered to the organization name "Silicon Graphics" in the cached IEEE snapshot: the early 08:00:69 block, from the historic 08:00:xx Ethernet vendor-code range, and 00:00:6B. Both list the same 2011 Shoreline Blvd., Mountain View registry address (with minor string-formatting differences), consistent with one company registering two blocks over time. The company filed Chapter 11 in April 2009 and sold its assets to Rackable Systems, which then rebranded itself "Silicon Graphics International" — so a globally-administered SGI OUI on a network today reliably flags legacy IRIX-era hardware for asset inventory rather than a currently shipping product. This is a substantive, well-documented vendor with clear named product context, not a bare single-OUI shell registration.

IEEE assignment

2 prefixes → "Silicon Graphics", registered Mountain View, CA, US [Confirmed] — IEEE MA-L (lines 2214, 33770)

Registry / block size

MA-L (24-bit OUI); two blocks — 00:00:6B and 08:00:69 [Confirmed] — the IEEE MA-L registry; cross-corroborated via https://api.maclookup.app/v2/macs/08:00:69. No MA-M or MA-S registration exists for this org name in the cached the IEEE MA-M registry / the IEEE MA-S registry snapshots [Confirmed]. NOTE: IEEE publishes NO OUI assignment/registration date; any "date registered" on a third-party tool (e.g. maclookup.app "Last Updated: July 2, 2019") is a database-refresh artifact, not an IEEE fact, and must not be recorded as an allocated/registered date.

HQ / country

2011 N. Shoreline Blvd., Mountain View, CA 94039-7311, US (registry address) [Confirmed] — IEEE MA-L

Company status

defunct — filed Chapter 11 April 1, 2009; assets sold to Rackable Systems (which rebranded as Silicon Graphics International) [Confirmed] — https://en.wikipedia.org/wiki/Silicon_Graphics

Device types

SGI workstations and servers — IRIS, Indigo, Indy, O2, Octane, Origin, Onyx (running IRIX); onboard Ethernet NICs, not standalone merchant networking chipsets [Likely] — https://en.wikipedia.org/wiki/Silicon_Graphics, https://rainbow.ldeo.columbia.edu/documentation/sgi-faq/admin/3.html

Founded

November 9, 1981, Mountain View, CA [Confirmed] — https://en.wikipedia.org/wiki/Silicon_Graphics

Verified sample prefixes (both MA-L, "Silicon Graphics")

00:00:6B, 08:00:69 [Confirmed] — IEEE the IEEE MA-L registry (lines 2214, 33770) / maclookup.app

Historic block

08:00:69 sits in the early 08:00:xx Ethernet vendor-code range, consistent with an SGI allocation from the 1980s workstation era [Confirmed assignment; 1980s dating is inferential from block position + hardware timeline] — IEEE the IEEE MA-L registry, vintage Ethernet vendor-code lists

Security context

no dedicated vendor security-advisory or abuse corpus for these OUIs; relevance is historical/asset-inventory only (spotting decommissioned legacy IRIX hardware still on a network). SGI defunct since 2009. [Unknown] — https://en.wikipedia.org/wiki/Silicon_Graphics

Analyst note

a globally-administered SGI OUI identifies genuine legacy SGI hardware for inventory; given the company has been defunct since 2009, its presence typically flags aged or decommissioned equipment.