Crystal Group, Inc. — 2 prefixes (MA-L)

Crystal Group, Inc. is an employee-owned rugged-hardware manufacturer headquartered in Hiawatha, Iowa, founded in 1987 and holding two distinct IEEE MA-L blocks — 0090D6 and 0091D6 — both registered under the identical legal name "Crystal Group, Inc." at the same Hiawatha address. That is unusual for a small manufacturer and signals a genuinely active hardware business rather than a one-off registration: the company designs and builds rugged/embedded servers, network switches, storage arrays, and displays for defense, government, and industrial customers operating in harsh environments. Independent reporting corroborates real-world deployment at scale — over 20,000 rugged servers delivered to the U.S. Navy since 2008, and a 2020s selection by the U.S. Air Force for the B-2 bomber's communications technology refresh — alongside partnerships with major defense integrators. IEEE's own OUI registry publishes no assignment date for either block, and none is fabricated here; any third-party "date registered" value seen on lookup tools is a database artifact, not an IEEE fact.

IEEE assignment

two MA-L prefixes, 0090D6 and 0091D6, both registered to "Crystal Group, Inc." at 850 Kacena Rd, Hiawatha, IA 52233, US [Confirmed] — the IEEE MA-L registry (lines 26448, 29123)

Registry / block size

MA-L (24-bit OUI) x2; no matching MA-M or MA-S (oui36) blocks found for this org [Confirmed] — the IEEE MA-M registry, the IEEE MA-S registry (checked, no match)

HQ / country

850 Kacena Rd, Hiawatha, IA 52233, US [Confirmed] — IEEE MA-L registry

Company status

active; employee-owned since 2011, founded 1987 [Likely] — https://www.crystalrugged.com/about/

Device types

rugged/embedded servers, network switches and networking appliances, storage/NAS systems, and displays for military, government, and industrial (harsh-environment) settings [Confirmed] — https://www.crystalrugged.com/products/

Notable products / customers

20,000+ rugged servers delivered to the U.S. Navy since 2008; selected for the USAF B-2 bomber communications technology refresh; partners include Lockheed Martin, DRS, General Dynamics, Progeny Systems [Confirmed] — https://www.crystalrugged.com/crystal-group-rugged-servers-us-navy/, https://www.militaryaerospace.com/commercial-aerospace/article/14229102/us-air-force-selects-crystal-group-rugged-servers-displays-for-b-2-bomber-communications-technology-refresh

Compliance claims

MIL-STD-810/167-1/461, MIL-S-901, IEEE/IEC industrial standards [Likely, vendor-stated] — https://www.crystalrugged.com/products/

Assignment/registration date

Unknown — IEEE the IEEE MA-L registry publishes no assignment/registration date for either block; not fabricated. A third-party lookup page for 0091D6 may display a "date registered" value, but that is a database artifact, not an IEEE fact, and is not recorded here.

[Confirmed absence] — the IEEE MA-L registry; caveat source https://uic.io/en/mac/address/0091d6/

Security / CVE record

no Crystal Group-specific CVE or public security advisory found in this research pass [Unknown] — no source found (absence of evidence, not evidence of absence)

Related vendors

none identified sharing this address or org-name pattern in the sampled registries

Analyst note

two independently-assigned MA-L blocks at the same registered address, plus multi-source corroboration of a substantial, ongoing defense/industrial hardware business, place this vendor well above the single-OUI-shell threshold — appropriate for a consolidated vendor entry rather than a thin per-prefix page.