Cray Inc — supercomputer / HPC systems maker (2 prefixes, MA-L)

A MAC address beginning 00:0E:AB or 00:40:A6 belongs to Cray Inc, the supercomputer and high-performance computing (HPC) systems manufacturer, typically seen on the management or interconnect network interfaces of Cray HPC hardware.

Cray Inc traces back to Seymour Cray's 1972 Cray Research; Silicon Graphics acquired Cray Research in 1996, and in 2000 Tera Computer Company acquired the Cray assets and renamed itself Cray Inc. Hewlett Packard Enterprise acquired Cray Inc in 2019 for $1.3B, and the Cray brand continues today as HPE's HPC product line.

Two separate MA-L assignments in the IEEE MA-L registry corroborate this as an established, ongoing manufacturer rather than a bare single-OUI registration: 00:0E:AB is registered to "Cray Inc" at 901 Fifth Avenue, Seattle, WA — the company's more recent HQ address — while 00:40:A6 is registered to "Cray, Inc." at 655F Lone Oak Drive, Eagan, MN — an earlier HQ address. The two blocks reflect different eras of the same company rather than different companies.

Cray's product line is HPC/supercomputer systems (the XC, XE, XK, and XD1 series), the Aries and Gemini high-speed interconnect NICs, and, post-HPE acquisition, the Slingshot interconnect. Cray's own System Management documentation describes BMC and node-controller network interfaces whose MAC addresses are collected for cluster provisioning — consistent with an HPC vendor's OUI-tagged management and interconnect hardware.

Two other registry rows containing "Cray" — 00:00:6D ("CRAY COMMUNICATIONS, LTD.", UK) and 00:00:80 ("CRAY COMMUNICATIONS A/S", Denmark) — belong to a separate, unrelated historical telecom-equipment company with no evident corporate link to Cray Inc, the supercomputer maker. Those two blocks are excluded from this entry.

IEEE assignment

00:0E:AB → Cray Inc, 901 Fifth Avenue, Seattle, WA 98104, US [Confirmed] — the IEEE MA-L registry (assignment key 000EAB)

IEEE assignment

00:40:A6 → Cray, Inc., 655F Lone Oak Drive, Eagan, MN 55121, US [Confirmed] — the IEEE MA-L registry (assignment key 0040A6)

Registry / block size

MA-L (24-bit OUI); 2 IEEE prefixes attributable to Cray Inc [Confirmed] — the IEEE MA-L registry

Excluded rows (different company)

00:00:6D "CRAY COMMUNICATIONS, LTD." (UK), 00:00:80 "CRAY COMMUNICATIONS A/S" (Denmark) [Confirmed] — the IEEE MA-L registry (assignment keys 00006D, 000080)

Company status

active, as the Cray brand within Hewlett Packard Enterprise since 2019 [Confirmed] — geekwire.com, startribune.com

Device types

Cray XC, XE, XK, XD1 HPC/supercomputer series; Aries/Gemini interconnect NICs; Slingshot interconnect [Confirmed] — en.wikipedia.org/wiki/Cray_XC40

Company history

1972 Cray Research founded by Seymour Cray → acquired by Silicon Graphics 1996 → Cray assets/name reconstituted 2000 when Tera Computer Company renamed itself Cray Inc → acquired by HPE 2019 [Confirmed] — en.wikipedia.org/wiki/Cray, startribune.com, geekwire.com

Product-security note

CVE-2022-28620 (CVSS 9.8), a critical remote authentication-bypass in HPE Cray EX/Slingshot/legacy Shasta node-controller and chassis-controller firmware, disclosed and patched by HPE under the Cray brand; this is brand-level product-security history under HPE ownership, not evidence tied specifically to traffic from the 00:0E:AB or 00:40:A6 blocks

[Confirmed] — cvedetails.com/cve/CVE-2022-28620

Third-party date caveat

maclookup.app shows "12 February 2004" for 00:0E:AB and "22 April 1998" for 00:40:A6; these are third-party database artifacts, not IEEE facts — IEEE publishes no OUI registration dates [Confirmed] — maclookup.app/macaddress/000EAB, maclookup.app/macaddress/0040A6

Related vendors

Hewlett Packard Enterprise (parent, since 2019); Silicon Graphics (owned Cray Research 1996-2000); Tera Computer Company (renamed itself Cray Inc, 2000) [Confirmed] — en.wikipedia.org/wiki/Cray

Malware/CVE association at the prefix level

none found as of an August 2026 search [Confirmed, negative finding] — cvedetails.com