Samsung Electro-Mechanics (Thailand) — 34 prefixes (MA-L)

Samsung Electro-Mechanics (Thailand) Co., Ltd. holds 34 MA-L (24-bit OUI) blocks in the IEEE registry, all registered to "SAMSUNG ELECTRO-MECHANICS(THAILAND)" at 93 Moo 5, T. Bangsamak, in the Wellgrow Industrial Estate, Bangpakong, Chachoengsao 24180, Thailand. The entity is a Samsung Group manufacturing subsidiary, and its OUI footprint maps to high-volume production of wireless connectivity modules: Wi-Fi/Bluetooth combo modules (IEEE 802.11 a/b/g/n/ac/ax plus Bluetooth 4.0–5.1 LE) and WiGig/5G mmWave antenna modules (802.11ad/ay, 60 GHz). These system-in-package modules are embedded in consumer and prosumer end-user hardware — smartphones, tablets, laptops, home appliances, VR/AR headsets, and CPE/routers — so a MAC in one of these ranges typically indicates a Samsung-ecosystem end-user device rather than network infrastructure or server hardware. A material caveat for any inventory or attribution work: in December 2021–January 2022 Hanwha Solutions acquired Samsung Electro-Mechanics' wireless module business (including the Thailand manufacturing unit, completed January 4, 2022) and rebranded it Hanwha NxMD. The 34 OUI blocks predate that transfer and remain registered under the Samsung Electro-Mechanics (Thailand) name in IEEE records; whether post-2022 Hanwha NxMD production continues under these same registrations is unconfirmed from public sources. The block count (34) is unusually high and is consistent with the address-space demand of mass module manufacturing. IEEE publishes no per-OUI allocation dates, so any "date registered" on third-party lookup tools (e.g. maclookup.app's Jan 2013 / Oct 2021 markers) is a database artifact, not an IEEE fact.

IEEE assignment

34 prefixes → SAMSUNG ELECTRO-MECHANICS(THAILAND), registered Bangpakong, Chachoengsao, TH [Confirmed] — IEEE MA-L

Registry / block size

MA-L (24-bit OUI); holds 34 IEEE prefixes (~570.4M addresses) [Confirmed] — IEEE the IEEE MA-L registry; maclookup.app (IEEE-sourced; count is a current snapshot and can drift). NOTE: IEEE's public OUI data publishes NO assignment/registration date (the IEEE MA-L registry columns are only Registry, Assignment, Organization Name, Organization Address); any "date registered" on third-party tools is a database artifact, not an IEEE fact.

HQ / country

93 Moo 5, T. Bangsamak, SEMTHAI, Wellgrow Industrial Estate, Bangpakong, Chachoengsao 24180, Thailand (TH) [Confirmed] — IEEE MA-L; hwaddress.com; maclookup.app. NOTE: some IEEE export rows for this same physical location show country code US — a data artifact, not a second address.

Company status

active manufacturing entity; Samsung Group subsidiary [Confirmed] — samsungsem.com; Wikipedia

Parent company

Samsung Electro-Mechanics Co., Ltd. (Samsung Group; HQ Suwon, South Korea) [Confirmed] — Wikipedia. The Thailand wireless-module business was sold to Hanwha Solutions, completed January 4, 2022, and rebranded Hanwha NxMD; post-transfer OUI ownership status is unconfirmed.

[Likely] — PR Newswire; jipyong.com

Device types

Wi-Fi/Bluetooth combo modules (802.11 a/b/g/n/ac/ax + BT 4.0–5.1 LE) and WiGig/5G mmWave antenna modules (802.11ad/ay, 60 GHz) embedded in smartphones, tablets, laptops, home appliances, VR/AR headsets, CPE/routers [Confirmed] — samsungsem.com

Verified sample prefixes (all MA-L)

04:D6:AA, 08:C5:E1, 14:49:E0, 30:AB:6A, 40:E9:9B, 54:88:0E, 8C:B8:4A [Confirmed] — IEEE the IEEE MA-L registry; maclookup.app

No MA-M / MA-S blocks

no entry for this entity exists in the MA-M (the IEEE MA-M registry) or MA-S (the IEEE MA-S registry) registries [Confirmed] — the IEEE MA-M registry, the IEEE MA-S registry

Allocated date

Unknown — IEEE publishes no registration dates for MAC/OUI prefixes; none present in the cached registry CSVs [Unknown] — no first-party source

IANA reference

none applicable — IANA governs protocol parameters, not IEEE OUI blocks; column stays blank [Confirmed] — IANA scope

Analyst note

A globally-administered MAC in one of these 34 ranges identifies a Samsung-ecosystem end-user device (phone, tablet, appliance, VR/AR), not server or enterprise-networking hardware. No CVEs specific to these module firmwares surfaced in research. Note the Hanwha NxMD ownership transition when attributing post-2022 hardware.