Mellanox Technologies — 67 prefixes (MA-L)

Mellanox holds 67 MA-L blocks in the IEEE registry, all registered to "Mellanox Technologies, Inc." at 350 Oakmead Parkway, Suite 100, Sunnyvale, CA 94085, US. The company — founded in May 1999 with dual headquarters in Yokneam Illit, Israel and Sunnyvale, California — was a leading supplier of high-performance InfiniBand and Ethernet interconnect hardware: ConnectX-series network adapters (NICs/HCAs), BlueField data processing units (DPUs/SmartNICs), Quantum InfiniBand switches, Spectrum Ethernet switches, and LinkX cables and transceivers. NVIDIA Corporation completed its acquisition of Mellanox on April 27, 2020 for approximately $6.9 billion (announced March 11, 2019), and the product line now ships under the NVIDIA Networking brand at network.nvidia.com; Mellanox Technologies, Ltd. no longer exists as an independent legal entity, though the IEEE registry still carries the original organization name. The practical signal for analysts: a Mellanox OUI on a network is a strong indicator of a server-grade host — enterprise data centers, HPC clusters, supercomputers, cloud infrastructure (AWS, Azure), and AI/ML training farms — not a consumer device, IoT endpoint, or workstation NIC. NVIDIA has disclosed several high-to-critical CVEs against the Mellanox/ConnectX/BlueField firmware since the acquisition (e.g. CVE-2025-23256, CVE-2025-23262, CVE-2025-23259, CVE-2024-0101), all requiring local or VM-adjacent access; firmware patches are published via the NVIDIA Enterprise Support portal.

IEEE assignment

67 prefixes → Mellanox Technologies, Inc., registered Sunnyvale, CA, US [Confirmed] — IEEE MA-L (oui.csv)

Registry / block size

MA-L (24-bit OUI); holds 67 IEEE prefixes (~1.1B addresses across the 67 blocks, ~16.7M each) [Confirmed] — local IEEE oui.csv. No entries in mam.csv (MA-M) or oui36.csv (MA-S). NOTE: IEEE's public OUI data publishes NO assignment/registration date (oui.csv columns are only Registry, Assignment, Organization Name, Organization Address); any "date registered" on third-party tools is a database artifact, not an IEEE fact.

HQ / country

350 Oakmead Parkway, Suite 100, Sunnyvale, CA 94085, US (registry address; consistent across all 67 entries). Company operated dual HQ in Yokneam Illit, Israel and Sunnyvale, California. [Confirmed] — IEEE MA-L (oui.csv), en.wikipedia.org/wiki/Mellanox_Technologies

Company status

absorbed — acquired by NVIDIA Corporation on April 27, 2020 (~$6.9B); no longer an independent legal entity; products continue under NVIDIA Networking [Confirmed] — nvidianews.nvidia.com (acquisition completion), nvidianews.nvidia.com (acquisition announcement)

Founded

May 1999 [Confirmed] — en.wikipedia.org/wiki/Mellanox_Technologies

Device types

network adapters (NICs/HCAs, ConnectX series), data processing units (DPUs/SmartNICs, BlueField series), InfiniBand switches (Quantum series), Ethernet switches (Spectrum series), cables and transceivers (LinkX) [Confirmed] — serverstor.com, en.wikipedia.org/wiki/Mellanox_Technologies

Notable products

ConnectX series NICs (ConnectX-3 through ConnectX-8, up to 400 Gb/s; multi-protocol InfiniBand + Ethernet); BlueField DPUs (BlueField-2/3); Quantum InfiniBand switches; Spectrum Ethernet switches; Innova IPsec Ethernet adapter [Confirmed] — serverstor.com, hpcwire.com (Innova IPsec adapter)

Industry

high-performance networking; data center interconnect; HPC; AI/ML training infrastructure [Confirmed] — serverstor.com

Verified sample prefixes

00:02:C9 (legacy Mellanox block, multiple third-party MAC databases), E4:1D:2D (macvendorlookup.com) [Likely — corroborated by third-party databases; IEEE publishes no per-company prefix index, but both prefixes appear in the local oui.csv 67-block set] — macvendorlookup.com, oui.csv

Usage context

Mellanox OUI addresses appear on server-grade network adapters in enterprise data centers, HPC clusters, supercomputers, cloud infrastructure (AWS, Azure), and AI/ML training farms. A Mellanox/NVIDIA Networking MAC strongly indicates a server-class host, not a consumer device or workstation NIC. [Confirmed] — serverstor.com, hpcwire.com

Security context

NVIDIA has disclosed several high/critical CVEs against Mellanox/ConnectX/BlueField products post-acquisition — e.g. CVE-2025-23256 (Critical; BlueField-2/3 management interface authorization bypass, local access), CVE-2025-23262 (High; ConnectX-5/6/7/8 authorization bypass → privilege escalation / config tampering), CVE-2025-23259 (Mellanox DPDK Poll Mode Driver; VM-hosted attacker → info disclosure + DoS), CVE-2024-0101 (Mellanox OS denial-of-service). Hardware exploits generally require local or VM-adjacent access; the attack surface is elevated-privilege server environments, not typical LAN scenarios. Firmware/driver patches via the NVIDIA Enterprise Support portal. [Confirmed] — securityonline.info, cvedetails.com (CVE-2025-23262), securityvulnerability.io (CVE-2024-0101)

IANA Reference

Unknown — no IANA RFC reference applies or is discoverable for this OUI entry; the IANA Reference column stays blank. [Unknown] — n/a

Related vendors

NVIDIA Corporation (parent, post-April 2020); Voltaire (InfiniBand company acquired by Mellanox in 2011) [Confirmed] — en.wikipedia.org/wiki/Mellanox_Technologies

Analyst note

A Mellanox OUI on a globally-administered address identifies genuine Mellanox/NVIDIA Networking server-grade hardware. The IEEE registry still lists "Mellanox Technologies, Inc." even though the entity was absorbed into NVIDIA in 2020 — registry org names lag corporate ownership changes, so the name on the block is not evidence the company is still independent.