The OUI prefix 38:A8:51 is a single MA-L block assigned to Quickset Defense Technologies, LLC, registered at 3650 Woodhead Drive, Northbrook, IL 60062, US. Unlike consumer-electronics vendors that hold dozens of blocks, this is one allocation covering 38-A8-51-00-00-00 through 38-A8-51-FF-FF-FF. The company builds military-grade networked surveillance hardware: precision two-axis pan-tilt positioners, electro-optical/infrared (EO-IR) camera systems, PTZ thermal cameras, and counter-unmanned-aircraft (C-UAS) platforms. These are network-centric devices — products advertise ONVIF, PSIA, and Genetec API support plus Gigabit Ethernet pass-through and dedicated IP payload ports — so they do appear on IP networks as identifiable endpoints. The company traces to 1933 and previously operated as Moog Sensor and Surveillance Systems before rebranding; its stated customers include the US military branches, DHS, US Customs and Border Protection, NASA, the Panama Canal, and allied forces in Europe and the Middle East. The security implication is the inverse of a consumer OUI: a 38:A8:51 address belongs on defense perimeters, border crossings, and critical-infrastructure installations, so the same MAC appearing on a general enterprise or consumer LAN is anomalous and worth investigating rather than waved through. Note that no IEEE registration date exists for this block — IEEE publishes none, and third-party "date registered" values (e.g. a "September 24, 2011" figure on one lookup site) are database artifacts, not registry facts.
- IEEE assignment
- 38:A8:51 → Quickset Defense Technologies, LLC, Northbrook, IL, US [Confirmed] — IEEE MA-L (enrichment/registries/oui.csv line 202; corroborated by maclookup.app and hwaddress.com)
- Registry / block size
- MA-L (24-bit OUI); single allocation covering 38-A8-51-00-00-00 through 38-A8-51-FF-FF-FF (~16.7M addresses) [Confirmed] — IEEE MA-L / maclookup.app / hwaddress.com. NOTE: IEEE's public OUI data publishes NO assignment/registration date; any "date registered" on third-party tools (e.g. maclookup.app "September 24, 2011") is a database artifact, not an IEEE fact.
- HQ / country
- 3650 Woodhead Drive, Northbrook, IL 60062, US (registry address) [Confirmed] — IEEE MA-L / hwaddress.com
- Company status
- active [Confirmed] — quickset.com, tracxn.com
- Device types
- precision two-axis pan-tilt positioners, EO-IR camera systems, PTZ thermal cameras (e.g. HD Visible Network Short Range PTZ Thermal Camera, EXO GeminEye dual-sensor system), C-UAS surveillance platforms [Confirmed] — quickset.com/pan-tilt-positioners/, quickset.com/hd-visible-network-short-range-ptz-thermal-camera/
- Network interfaces
- ONVIF, PSIA, and Genetec API support; Gigabit Ethernet pass-through and dedicated IP payload ports [Confirmed] — quickset.com/pan-tilt-positioners-technical-overview/
- Company background
- founded 1933; formerly Moog Sensor and Surveillance Systems before rebranding; serves US Army/Air Force/Navy/Marine Corps, DHS, US CBP, NASA, the Panama Canal, and allied European/Middle Eastern forces [Confirmed] — tracxn.com, quickset.com/news/, quickset.com/ausa-2025-annual-meeting/
- Registration date
- Unknown — IEEE publishes none; third-party "date registered" values are database artifacts not attributable to the IEEE registry [Unknown] — (no authoritative source)
- IANA reference
- not applicable — OUI registration is IEEE-administered, not IANA [Unknown] — (no IANA reference)
- Special note
- company website quickset.com returns HTTP 403 on direct automated fetch; all product/customer details corroborated from indexed search snippets and public AUSA/vendor-directory profiles. Domain confirmed reachable and indexed as the official vendor site. [Confirmed] — maclookup.app, hwaddress.com
- Analyst note
- A 38:A8:51 address identifies genuine Quickset military/surveillance hardware. These are not consumer or SMB devices; an address in this block on a general enterprise or consumer network is anomalous and warrants investigation. Because the devices are network-centric (Gigabit Ethernet, ONVIF/PSIA/Genetec), they legitimately appear as IP endpoints on defense, border, and critical-infrastructure networks.