Solarflare Communications, Inc. — 2 prefixes (MA-L)

Solarflare Communications holds two IEEE MA-L assignments — 00:0A:68 and 00:0F:53 — both registered to the same Irvine, California address, which is itself a mild substance signal: most bare shell registrants hold exactly one block. Founded in 2001 and headquartered in Irvine, Solarflare built its name on ultra-low-latency 10/25/40/50/100GbE PCIe network interface cards paired with Onload, a user-space kernel-bypass TCP/IP stack, targeting electronic/algorithmic trading desks and high-performance data-center networking — a well-documented, financially backed company (14 funding rounds, $300M+ raised), not an anonymous filer. Xilinx acquired Solarflare in a deal that closed July 31, 2019 for roughly $400M, continuing the line as "Xilinx Solarflare" with SmartNIC/FPGA-accelerated SN1000/SN1022 variants; when AMD acquired Xilinx in 2022, the product family passed through again and is still actively marketed today as "AMD Solarflare X2/X4" Ethernet adapters. That unbroken, multi-company acquisition trail with a live current product page clears the abstain-on-shells bar comfortably: this is an identifiable company with real device and market context, not a bare registration.

IEEE assignments

00:0A:68, 00:0F:53 → Solarflare Communications Inc., Suite 100, 7505 Irvine Center Drive, Irvine, CA, US 92618 (identical address on both rows) [Confirmed] — the IEEE MA-L registry, the IEEE MA-L registry

Registry / block size

MA-L (24-bit OUI) x2; no MA-M or MA-S blocks found under this registrant [Confirmed] — the IEEE MA-M registry, the IEEE MA-S registry

HQ / country

Irvine, CA, US (registry address, matches company HQ at time of founding) [Confirmed] — the IEEE MA-L registry

Company status

Acquired — no longer independent. Acquired by Xilinx (deal closed July 31, 2019, ~$400M); folded into AMD when AMD acquired Xilinx in 2022; product line still actively sold as "AMD Solarflare" [Confirmed] — https://www.prnewswire.com/news-releases/xilinx-to-acquire-solarflare-300837025.html, https://www.datacenterdynamics.com/en/news/xilinx-closes-solarflare-acquisition/, https://www.amd.com/en/products/ethernet-adapters/solarflare-x4.html

Device types

PCIe low-latency Ethernet NICs (10/25/40/50/100GbE), SmartNIC/FPGA-accelerated adapters (SN1000/SN1022 under Xilinx), used with the Onload kernel-bypass TCP/IP stack [Confirmed] — https://www.servethehome.com/amd-solarflare-x4-nics-launched-for-low-latency-trading/, https://pcbsync.com/xilinx-smartnic/

Notable products / market

X2/SFN-series NICs and AMD Solarflare X4 adapters, marketed for ultra-low-latency electronic/algorithmic trading and HPC/data-center networking [Confirmed] — https://www.amd.com/en/blogs/2025/new-amd-solarflare-x4-low-latency-ethernet-adapter-set.html

Registration date

Unknown / not published — IEEE's public OUI data (the IEEE MA-L registry: Registry, Assignment, Organization Name, Organization Address) carries no date field for either block; any "date registered" shown on third-party lookup mirrors is a database artifact, not an IEEE fact

[Confirmed] — the IEEE MA-L registry

Security context

No Solarflare- or Onload-specific CVE or vendor security advisory surfaced in this research pass. This is a sourced absence, not a clean bill of health — a full NVD vendor-field-scoped query was not run, so record as [Unknown] rather than "no vulnerabilities exist."

Related vendors

Xilinx (acquirer, 2019); AMD (parent since the 2022 Xilinx acquisition) [Confirmed] — https://www.theregister.com/2019/04/25/xilinx_buying_solarflare/, https://www.amd.com/en/products/ethernet-adapters.html

Analyst note

Two MA-L blocks under one registrant plus a rich, multi-source acquisition trail (Solarflare → Xilinx → AMD) with a still-current product page is a clear pass on the company-substance bar — treat as a legitimate, mergeable vendor entry, not a shell registration.