OUI B4:3D:08 is a single MA-L block registered to GX International BV, the Netherlands-registered legal entity behind the GX Group (gxgroup.eu) — a European maker of fiber-to-the-home access hardware. The registry row places the organization at Waldfeuchterbaan 124, Maria Hoop, NL 6105 BP, and the company's public marketing describes it as a designer and manufacturer of GPON and XGS-PON Optical Network Terminals (ONTs), fiber gateways, and dual-band Wi-Fi routers, with the hardware and software developed end-to-end for FTTH deployments. Devices in this class — sold under product names such as the Earth-1000R router and various XPON CPE units — are typically ISP-deployed at the subscriber edge in residential and small-business networks, primarily across Europe and India, where the company also operates R&D and manufacturing. No CVEs or security advisories naming GX International BV or this prefix were found in this pass; the usual GPON/ONT concerns (default-credential hygiene, TR-069 remote management exposure, link-layer encryption) apply generically to the device class rather than to any GX-specific incident. One data-quality caveat: third-party MAC lookup tools display "30 July 2021" as a registration date for this prefix, but IEEE publishes no OUI registration dates — that value is a database artifact and must not be recorded as an IEEE fact.
- IEEE assignment
- B4:3D:08 → GX International BV [Confirmed] — IEEE oui.csv (registries/oui.csv line 816); also maclookup.app/vendors/gx-international-bv
- Registry / block size
- MA-L (24-bit OUI / MAC Address Block Large) [Confirmed] — IEEE oui.csv; maclookup.app
- Registry address
- Waldfeuchterbaan 124, Maria Hoop, NL 6105 BP [Confirmed] — IEEE oui.csv row (MA-L,B43D08,GX International BV,Waldfeuchterbaan 124 Maria Hoop Maria Hoop NL 6105 BP)
- HQ / country
- Netherlands (registry address Maria Hoop; company site also lists Echt, NL); R&D/manufacturing operations also noted in India (Gurgaon/Manesar, Haryana) [Likely — registry vs. corporate-site/directory addresses differ] — gxgroup.eu, zoominfo.com/c/gx-international-bv/482367758
- Allocated date
- Unknown — IEEE publishes no assignment/registration dates for MAC/OUI prefixes, and none is present in the cached registry file. The "30 July 2021" shown on third-party lookups is a database artifact, NOT an IEEE fact. [Unknown] — IEEE oui.csv (no date column); maclookup.app
- Company status
- active [Likely] — gxgroup.eu
- Device types
- FTTH/fiber CPE — GPON and XGS-PON Optical Network Terminals (ONTs), fiber gateways, dual-band Wi-Fi routers (e.g. Earth-1000R), XPON CPE [Confirmed] — gxgroup.eu; flipkart.com (GX Group Earth-1000R router); tracxn.com/d/companies/gxgroup
- Industry
- fiber-access networking hardware (FTTH/GPON/XGS-PON CPE) [Confirmed] — gxgroup.eu
- Vendor-site corroboration
- gxgroup.eu is the brand's public site marketing GX Group as a European FTTH/GPON/XGS-PON manufacturer; GX International BV is the Netherlands BV legal entity for the brand [Confirmed] — gxgroup.eu
- Security context
- no CVEs, public vulnerability disclosures, or advisories naming GX International BV or B4:3D:08 found in this pass; generic GPON/ONT risk profile (default creds, TR-069 exposure, AES link encryption) applies to the device class [Confirmed: none found this pass] — research pass (no vendor-specific source)
- Security risk level
- Unknown — no vendor-specific incidents found; standard ISP-deployed residential/SMB CPE risk profile [Unknown] — research pass
- Found in
- oui.csv only; not present in mam.csv or oui36.csv [Confirmed] — registries/oui.csv line 816
- Analyst note
- A B4:3D:08 globally-administered address identifies GX International BV fiber CPE; treat it as an ISP edge device (ONT/router), not an end-user-owned brand product. Do not surface the third-party "2021" date as an IEEE registration date.