The IEEE registers OUI 48:6F:33 to "KYUNGWOO.SYSTEM, INC." at 68, Digital-ro 9-gil, Geumcheon-gu, Seoul, Republic of Korea — a single MA-L block, which covers roughly 16.77 million addresses. The IEEE name normalizes a South Korean industrial-electronics firm that trades as Kyungwoo Systech, Inc. (경우시스테크), founded July 1999. Two independent angles (the company site and FCC grantee records under code ZE8) agree that the firm does not build conventional Ethernet switches or Wi-Fi access points: its products are industrial safety electronics for construction equipment and heavy vehicles. The flagship line is KIGIS IPAS — an Ultra-Wideband (UWB) proximity-alert system for vehicle-to-pedestrian and vehicle-to-vehicle collision avoidance — alongside keyless smart-key systems and display/control units. The UWB radios operate in the 3720–4225 MHz band under FCC Part 15F, and the firm is a FiRa Consortium member, the UWB interoperability body whose DWM3001C module the KIGIS line uses. The practical reading for OUI work: a 48:6F:33 address indicates an embedded network interface in an industrial IoT/telematics device used on construction sites and in warehouses, not a general-purpose computer or networking appliance. No registration date should be attached to this entry — IEEE publishes none, and the 2022-12-28 value seen on third-party lookup tools is a database ingest artifact, not an IEEE fact.
- IEEE assignment
- 48:6F:33 → KYUNGWOO.SYSTEM, INC. [Confirmed] — IEEE MA-L (enrichment/registries/oui.csv line 243); maclookup.app/vendors/kyungwoo-system-inc
- Registry / block size
- MA-L (24-bit OUI; ~16.77M addresses), one prefix registered [Confirmed] — IEEE MA-L. NOTE: IEEE's public OUI data publishes NO assignment/registration date; the 2022-12-28 "date" on third-party tools (maclookup.app) is a database artifact reflecting first ingest, not an IEEE fact.
- Registry address / country
- 68, Digital-ro 9-gil, Geumcheon-gu, Seoul 08512, Republic of Korea (KR) [Confirmed] — IEEE MA-L; https://www.kyungwoo.com/en/about/about.php
- Company status
- active [Confirmed] — https://www.kyungwoo.com/en/
- Legal / trade name
- Kyungwoo Systech, Inc. (Korean: 경우시스테크); IEEE name "KYUNGWOO.SYSTEM, INC."; manuf short-form alias "KyungwooSyst" [Confirmed] — https://www.kyungwoo.com/en/about/about.php; maclookup.app/vendors/kyungwoo-system-inc
- Founded
- July 1999 [Confirmed] — https://www.kyungwoo.com/en/about/about.php
- Industry
- industrial safety electronics for construction equipment and industrial/heavy vehicles [Confirmed] — https://www.kyungwoo.com/en/
- Device types / product lines
- (1) KIGIS IPAS — UWB Intelligent Proximity Alert System (V2P/V2V collision-avoidance tags + zone anchors); (2) Smart Key systems (keyless entry/engine start for heavy equipment); (3) display & control units for industrial vehicles [Confirmed] — https://www.kyungwoo.com/en/; https://www.firaconsortium.org/devices-dev-tools/kigis%C2%AE-ipas-intelligent-proximity-alert-system; https://www.qorvo.com/innovation/ultra-wideband/partners/kigis-safety-technology
- Wireless technology
- Ultra-Wideband (UWB), 3720–4225 MHz, FCC Part 15F; FCC grantee code ZE8 covers multiple UWB proximity-alert and smart-key RF devices. No public evidence of conventional 802.11 Wi-Fi or Ethernet MAC-layer products [Confirmed] — https://fccid.io/ZE8; https://fccid.io/ZE8-PAS-K01-40
- Standards / memberships
- FiRa Consortium (UWB interoperability; KIGIS IPAS uses the DWM3001C module), Car Connectivity Consortium; quality certs IATF 16949, ISO 9001, ISO 14001 [Confirmed] — https://www.kyungwoo.com/en/about/about.php; https://www.firaconsortium.org/devices-dev-tools/kigis%C2%AE-ipas-intelligent-proximity-alert-system
- Security context
- no published CVEs, CISA KEV entries, or vendor security advisories found. Device class (UWB proximity tags, industrial smart-key fobs) is an OT/IIoT category; no internet-facing IP service is documented in public FCC filings or product materials. General IIoT risk applies — devices sit in safety-critical roles (collision alerts) in physically sensitive sites — but vendor security architecture is not publicly disclosed [Likely] — https://www.qorvo.com/innovation/ultra-wideband/partners/kigis-safety-technology; https://fccid.io/ZE8
- Registration date
- Unknown — IEEE publishes no assignment dates; no date recorded in the source CSV [Unknown] — IEEE MA-L
- IANA Reference
- blank — no applicable IANA RFC reference for this OUI entry [Unknown] — n/a
- Website
- https://www.kyungwoo.com/en/ [Confirmed] — https://www.kyungwoo.com/en/
- Analyst note
- a 48:6F:33 address identifies an embedded interface in a Kyungwoo Systech industrial-IoT/telematics device (UWB proximity-alert or smart-key gear for construction/warehouse vehicles), not a PC, phone, or networking appliance. Treat for asset classification accordingly.