Advanced Micro Devices, Inc. — 4 confirmed prefixes (MA-L)

A MAC address beginning with 74:27:2C, 00:0C:87, 24:81:4E, or the legacy 00:00:1A belongs to Advanced Micro Devices, Inc. (AMD), the semiconductor company headquartered in Santa Clara, California, best known for CPUs, GPUs, and — since acquiring Xilinx in 2022 — adaptive-computing (FPGA) silicon.

AMD holds at least four confirmed MA-L (24-bit) OUI blocks, all four present in the site's cached canonical IEEE registry (the IEEE MA-L registry): 74:27:2C, registered to "Advanced Micro Devices, Inc." at 7171 Southwest Pkwy, Austin, TX; 00:00:1A, an older block registered to "ADVANCED MICRO DEVICES" at a P.O. Box in Sunnyvale, CA; 00:0C:87, registered to "AMD" at 4555 Great America Pkwy, Santa Clara, CA; and 24:81:4E, registered to "AMD" at 2485 Augustine Dr., Santa Clara, CA.

The maclookup.app IEEE mirror independently corroborates 00:0C:87 and 24:81:4E at the same Santa Clara, CA addresses. The 24:81:4E registered address also independently matches AMD's SAM.gov federal-contractor entity record, corroborating that assignment across three sources.

No source in this pass directly sighted a device using any of these prefixes. AMD's plausible use case is Ethernet silicon: legacy Am79C97x LANCE/PCnet chips on embedded boards such as the Elan SC520, and, post-Xilinx, integrated Ethernet MAC IP inside Versal and Alveo adaptive-computing parts.

As with all IEEE OUI data, no registration date is published for any AMD block. Third-party aggregators sometimes label a scrape/index timestamp "registered on" — that is a database artifact, not an IEEE fact, and must not be recorded as AMD's assignment date.

IEEE assignment

4 confirmed prefixes → Advanced Micro Devices, Inc. [Confirmed] — the IEEE MA-L registry lines 8159, 23784, 29173, 30254; maclookup.app (corroborating 00:0C:87, 24:81:4E)

Registry / block size

MA-L (24-bit OUI); at least 4 confirmed blocks (74:27:2C, 00:00:1A, 00:0C:87, 24:81:4E) [Confirmed] — the IEEE MA-L registry; https://api.maclookup.app/v2/macs/00:0C:87; https://api.maclookup.app/v2/macs/24:81:4E

HQ / country

2485 Augustine Dr., Santa Clara, CA 95054, US (current entity address per SAM.gov, independently matching the 24:81:4E registry address); IEEE registry also lists 7171 Southwest Pkwy, Austin, TX and a legacy Sunnyvale, CA P.O. Box

[Confirmed] — https://opengovus.com/sam-entity/YPJLGM8NML99; the IEEE MA-L registry

Company status

active [Confirmed] — https://opengovus.com/sam-entity/YPJLGM8NML99 (live federal-contractor entity record)

Device types

Ethernet networking silicon — legacy Am79C97x LANCE/PCnet chips; Xilinx-derived Versal/Alveo Ethernet MAC IP [Likely, inferred not directly sighted] — https://en.wikipedia.org/wiki/AMD_%C3%89lan; https://docs.amd.com/r/en-US/pg314-versal-mrmac; https://lkml.iu.edu/hypermail/linux/kernel/0101.3/0097.html

Notable products

CPUs, GPUs, semi-custom SoCs, FPGA/adaptive-computing silicon via the 2022 Xilinx acquisition [Likely] — https://docs.amd.com/r/en-US/pg314-versal-mrmac

Verified sample prefixes (all MA-L)

74:27:2C (Austin, TX), 00:00:1A (Sunnyvale, CA — legacy), 00:0C:87 (Santa Clara, CA), 24:81:4E (Santa Clara, CA) [Confirmed] — the IEEE MA-L registry; https://api.maclookup.app/v2/macs/00:0C:87; https://api.maclookup.app/v2/macs/24:81:4E

Historic block

00:00:1A → "ADVANCED MICRO DEVICES" at a Sunnyvale, CA P.O. Box, an early 00:00:xx-range Ethernet OUI consistent with AMD's decades-long history as an Ethernet-chip vendor, predating its later Austin, TX and Santa Clara addresses. [Confirmed assignment; era is inferential from block-range position] — the IEEE MA-L registry

Special note

No IEEE-published registration date exists for any AMD OUI block; third-party "registered on" timestamps (e.g. maclookup.app) are scrape/index artifacts, not IEEE facts, and must not be presented as such.

[Confirmed] — https://api.maclookup.app/v2/macs/00:0C:87; https://api.maclookup.app/v2/macs/24:81:4E

Related vendors

Xilinx, Inc. (acquired by AMD in 2022), holding MA-L 00:5D:03 ("Xilinx, Inc", 2100 Logic Drive, San Jose, CA) and 00:0A:35 ("Xilinx", same street address) as separate registrations not consolidated into this entry [Confirmed] — the IEEE MA-L registry

Analyst note

An AMD OUI hit is best read as "AMD networking silicon inside a board or device," not "AMD-branded device" — AMD is a chip supplier rather than primarily an end-device manufacturer, so the signal differs in kind from a router/AP or phone vendor hit.