Phytium Technology Co., Ltd. — 5 prefixes (4 MA-L + 1 MA-M)

Phytium holds five IEEE registrations under "Phytium Technology Co.,Ltd." — four 24-bit MA-L blocks (C0:2B:31, 24:DC:0F, 68:6B:6A, 98:0E:24) plus one 28-bit MA-M block (3C:6A:2C:B), all carrying the Tianjin registry address at Building 5, XinAn Business Square, Haiyuan Middle Road, Binhai New District. Phytium is not a network-adapter maker: it is an ARMv8 processor and SoC designer (founded 2014, a China Electronics Corporation–linked joint venture) whose product line is server, desktop, and embedded CPUs — the TENGYUN S-series servers, TENGRUI D-series desktops, and TENGLONG E-series embedded parts. No Phytium product page or third-party teardown names a standalone NIC, so these OUIs most plausibly cover integrated Ethernet MACs on Phytium SoCs or the management interfaces of Phytium-based server and embedded boards rather than discrete network cards. The regulatory context is the dominant fact for triage and is confirmed: "Tianjin Phytium Information Technology" was added to the US Commerce Entity List effective 8 April 2021 (86 FR 18437, published 9 April 2021) for supporting China's military modernization and destabilizing supercomputing programs, with a presumption-of-denial license policy; separately, Cadence Design Systems pleaded guilty in 2025 and paid over $140 million for unlawfully exporting EDA tools to Phytium and affiliated entities. Phytium's market is almost entirely China's domestic government, military, banking, and telecom sectors, with minimal legitimate commercial presence abroad — so a Phytium OUI surfacing in a non-Chinese enterprise or government network is a meaningful compliance and asset-provenance signal. Stated as factual regulatory context, not advocacy.

IEEE assignment

5 prefixes → Phytium Technology Co.,Ltd.; 4× MA-L (C0:2B:31, 24:DC:0F, 68:6B:6A, 98:0E:24) + 1× MA-M (3C:6A:2C:B); registered Tianjin, China [Confirmed] — IEEE MA-L/MA-M (enrichment/registries/oui.csv lines 748, 16264, 22709, 24989; enrichment/registries/mam.csv line 1827)

Registry / block size

four MA-L blocks (24-bit OUI, ~16.7M addresses each) + one MA-M block (28-bit, ~1.05M addresses), ~67.9M addresses total [Confirmed] — IEEE MA-L/MA-M. NOTE: IEEE's public OUI data publishes NO assignment/registration date (oui.csv columns are only Registry, Assignment, Organization Name, Organization Address); dates shown on third-party tools (e.g. maclookup.app: 2018-07-22 through 2024-07-24) are database artifacts, NOT IEEE facts, and must not be presented as registration timestamps.

HQ / country

Building 5, XinAn Business Square, Haiyuan Middle Road, Binhai New District, Tianjin 300450, CN (registry address; the corporate site also gives Information Industrial Park, No. 1 Haiyuan Road, Binhai New Area) [Confirmed] — IEEE MA-L/MA-M; phytium.com.cn/en/about_us/

Company status

active; ARMv8 CPU/SoC manufacturer, founded 2014, a China Electronics Corporation–linked joint venture; also listed as "Tianjin Phytium Information Technology" (飞腾) on the US Entity List [Confirmed] — phytium.com.cn/en/about_us/, federalregister.gov

Device types

integrated Ethernet on ARM server/desktop/embedded SoCs and on-board management interfaces; NOT a discrete-NIC vendor [Likely] — phytium.com.cn/en/about_us/, maclookup.app (no product page or teardown names a standalone NIC; OUIs inferred to ride on Phytium SoCs/boards)

Notable products

TENGYUN S-series (server), TENGRUI D-series (desktop), TENGLONG E-series (embedded) CPUs [Confirmed] — phytium.com.cn/en/about_us/

Verified prefixes (all Phytium Technology Co.,Ltd.)

C0:2B:31, 24:DC:0F, 68:6B:6A, 98:0E:24 (MA-L); 3C:6A:2C:B (MA-M) [Confirmed] — IEEE MA-L/MA-M (cached oui.csv / mam.csv)

MA-S (oui36 / 36-bit) entry

none found for this vendor [Confirmed] — enrichment/registries/oui36.csv (no Phytium row)

Allocated / registration date

Unknown — IEEE publishes no OUI registration date; no first-party date exists for these prefixes (this is by design, not a data gap; third-party "first seen" dates are not used) [Unknown] — IEEE oui.csv schema

Regulatory

"Tianjin Phytium Information Technology" added to US Commerce Entity List eff. 2021-04-08 (86 FR 18437, published 2021-04-09) for military-modernization / supercomputing concerns; all US-origin exports require a BIS license under a presumption-of-denial review policy. Separately, Cadence Design Systems pleaded guilty (2025) and paid >$140M for unlawfully exporting EDA tools to Phytium and affiliated entities (2015–2021) [Confirmed] — federalregister.gov, commerce.gov, justice.gov

Market / customer base

primarily China's domestic government, military, banking, telecom, and utility sectors; reported ~200K CPUs sold in 2019 and ~1.5M in 2020; minimal legitimate commercial presence outside China [Confirmed] — phytium.com.cn/en/about_us/, insidehpc.com

Related vendors

China Electronics Corporation (CEC, parent/JV stakeholder); cross-reference other Entity-List Chinese silicon vendors during triage

Analyst note

A Phytium OUI most likely identifies an ARM server/desktop/embedded board's integrated Ethernet, not a network card; given the Entity List designation, its appearance in a non-Chinese enterprise or government network warrants elevated scrutiny as a compliance and asset-provenance signal.