Benchmark Electronics, Inc. — multi-site EMS/ODM manufacturer (10 OUI/MA-L/MA-S prefixes)

Benchmark Electronics is a NYSE-listed (BHE) contract electronics manufacturing services (EMS) and ODM company headquartered in Tempe, Arizona, with roughly 11,840 employees and about $2.7B in trailing-twelve-month revenue across 23 production sites in 8 countries. Unlike a single-OUI shell registration, its IEEE footprint spans 10 distinct prefixes registered under five separately-named legal entities tied to specific manufacturing sites: 00:0E:9C (Rochester, MN, US — base entity), 00:23:59 (Benchmark Electronics (Thailand) Public Company Limited, Ayudhaya), 90:79:90 (Benchmark Electronics Romania SRL, Brasov), 98:CB:A4 (Penang, Malaysia), five MA-S /36 blocks for Benchmark Electronics BV (Almelo, Netherlands), and one MA-S block for "Benchmark Electronics - Secure Technology" in Santa Ana, California — the former Secure Communication Systems, Inc., acquired by Benchmark in 2015, which builds mission-critical defense and encrypted-communications hardware. Because Benchmark manufactures for OEM customers rather than selling branded consumer products, MAC addresses under these prefixes typically belong to industrial, medical, aerospace/defense, or embedded IoT gateway/sensor hardware rather than mainstream consumer routers or phones.

IEEE assignments

4 MA-L blocks (00:0E:9C, 00:23:59, 90:79:90, 98:CB:A4) + 6 MA-S/36 blocks (5× Benchmark Electronics BV, 1× Benchmark Electronics - Secure Technology) = 10 total prefixes across 5 distinct registrant names [Confirmed] — the IEEE MA-L registry, the IEEE MA-S registry (IEEE-sourced cache); cross-checked against https://standards-oui.ieee.org/oui/oui.csv

Base registry / block size

MA-L (24-bit) for the core "Benchmark Electronics" and country-affiliate names; MA-S (36-bit) for Benchmark Electronics BV and the Secure Technology division [Confirmed] — the IEEE MA-L registry, the IEEE MA-S registry

HQ / registered addresses

base entity registered at 3535 Technology Drive, Rochester, MN 55901, US; affiliated registrant names carry site addresses in Ayudhaya, TH; Brasov, RO; Penang, MY; and Almelo, NL. Corporate HQ (per company site) is Tempe, AZ

[Confirmed] — the IEEE MA-L registry, the IEEE MA-S registry; https://www.bench.com/

Company status

active, NYSE: BHE, ~11,840 employees, ~$2.7B TTM revenue, 23 sites / 8 countries [Confirmed] — https://en.wikipedia.org/wiki/Benchmark_Electronics; https://s203.q4cdn.com/219528228/files/doc_financials/2024/q4/de4d21cb-fa71-4410-8b21-6a5af5bb7f2e.pdf

Device types

contract-manufactured OEM hardware — industrial/capital equipment, medical devices (HL7/FDA-cybersecurity-compliant builds), aerospace & defense electronics, IoT gateways, wireless sensor mesh networks, GPS/location trackers, wearable biomonitoring devices, smart-city/kiosk systems

[Likely] — https://www.bench.com/iot-solutions

Notable products

none branded — Benchmark builds to customer spec rather than selling consumer products; its own marketing describes reference designs for the device classes above [Likely] — https://www.bench.com/iot-solutions

Secure Technology subsidiary (Santa Ana, CA)

formerly Secure Communication Systems, Inc., acquired by Benchmark ~Nov 2015 (~$230M); builds customized electronics for mission-critical defense/aerospace and encrypted-communications applications; one of the 6 MA-S blocks (70:B3:D5-67C) is registered to this division specifically [Likely] — https://vancestreetcapital.com/news/2015/10/vance-street-capital-to-sell-secure-technology-company-to-benchmark-electronics/; https://www.socaltech.com/Secure_Technology_Company_Sold_To_Benchmark_Electronics_For__3_M/s-0062576.html; https://www.bench.com/santa-ana-california

Excluded entity

00:08:78 "Benchmark Storage Innovations" (Boulder, CO) shares the "Benchmark" name but is a distinct legal entity ("Storage Innovations," not "Electronics") and is NOT included in this vendor's prefix set [Confirmed] — the IEEE MA-L registry

Data artifact flag

the Romania SRL row's address field prints "US 507075" in the cached registry CSV alongside the Brasov, RO street address — reported verbatim as a likely registry data artifact, not corrected or independently verified [Unknown] — the IEEE MA-L registry

Registration date

none published or recorded. IEEE's public OUI/MA-S data (the IEEE MA-L registry, the IEEE MA-S registry) carries no assignment-date field; any "date registered" on third-party MAC lookup tools for these prefixes is a database artifact, not an IEEE fact

[Confirmed] — the IEEE MA-L registry, the IEEE MA-S registry

Related vendors

Benchmark Electronics BV (Netherlands MA-S registrant); Benchmark Electronics (Thailand) Public Company Limited; Benchmark Electronics Romania SRL; Benchmark Electronics - Secure Technology (Santa Ana, CA, formerly Secure Communication Systems, Inc.)

[Confirmed] — the IEEE MA-L registry, the IEEE MA-S registry

Analyst note

multi-entity, multi-country OUI footprint plus a sourced $2.7B-revenue, NYSE-listed EMS business is well beyond a bare single-OUI shell registration — devices bearing these prefixes skew industrial/medical/defense/IoT rather than consumer, and the Secure Technology prefix specifically skews toward encrypted-comms/defense hardware.