Shokz — 4 prefixes (MA-L); consumer Bluetooth bone-conduction & open-ear audio

Shokz (legal entity "Shenzhen Shokz Co., Ltd.", formerly branded AfterShokz) holds four MA-L blocks in the IEEE registry. Three — A8:F5:E1, A0:0C:E2, and B8:84:11 — are registered to "Shenzhen Shokz Co., Ltd." at a single Bao'an District industrial-park address in Shenzhen, Guangdong (CN 518108). The fourth, 24:68:30, is registered to a distinct legal-entity name string, "Shenzhen Shokzhear Co., Ltd," at the same Shancheng Industrial Park complex (CN 518108) — a separate registrant name rather than an editorial inference, most plausibly a legacy or variant entity used at the time of that block's registration. Shokz makes consumer audio: bone-conduction headphones, open-ear headphones and earbuds, communication headsets, and swimming headphones. These are Bluetooth peripherals; they do not connect to Wi-Fi and do not emit 802.11 frames, so a Shokz OUI in a wired or Wi-Fi capture would be anomalous. For triage, a Shokz prefix identifies a paired audio accessory, not a router, server, or IoT node, and not a network intrusion. The brand assigns these blocks to its own finished products, so a Shokz prefix reliably maps to a Shokz-branded device — host-side Wi-Fi MAC randomization on the connecting phone or laptop is a separate matter and does not change the vendor mapping of the accessory's own globally-administered MAC.

IEEE assignment

4 prefixes → "Shenzhen Shokz Co., Ltd." (3) and "Shenzhen Shokzhear Co., Ltd" (1), registered Shenzhen, Guangdong, CN [Confirmed] — IEEE MA-L (enrichment/registries/oui.csv lines 8009, 15027, 30313, 39239)

Registry / block size

MA-L (24-bit OUI); 4 blocks (~67M addresses) [Confirmed] — enrichment/registries/oui.csv; corroborated by https://maclookup.app/vendors/shenzhen-shokz-co-ltd

Verified prefixes (all MA-L)

A8:F5:E1, A0:0C:E2, B8:84:11 → "Shenzhen Shokz Co., Ltd."; 24:68:30 → "Shenzhen Shokzhear Co., Ltd" [Confirmed] — enrichment/registries/oui.csv

Registry address

Baoan District Shiyan street Shancheng Industrial zone 26 building, Shenzhen, Guangdong, CN 518108 (A8:F5:E1 / A0:0C:E2 / B8:84:11). 24:68:30 lists "Floors 5, Factory Building 28, Shancheng Industrial Park, Shixin Community, ... Shiyan Street, Bao'an District, Shenzhen, Guangdong, CN 518108" — same Shancheng Industrial Park complex under the Shokzhear name [Confirmed] — enrichment/registries/oui.csv

Distinct registrant name

24:68:30 → "Shenzhen Shokzhear Co., Ltd" is a separate organization-name string in the registry (same industrial-park address as the Shokz blocks), likely a legacy/variant entity name at time of that registration — not the same string as the other three blocks [Confirmed assignment; "legacy/variant" relationship is inferential] — enrichment/registries/oui.csv

HQ / country

Shenzhen, Guangdong, China (manufacturing / R&D registry address); North American operations in Austin, Texas, US [Confirmed registry / Likely for Austin] — enrichment/registries/oui.csv; https://ca.shokz.com/pages/about-us; https://baike.baidu.com/en/item/Shokz/1460226

No IEEE date

IEEE public OUI data (oui.csv columns: Registry, Assignment, Organization Name, Organization Address) contains NO registration date. Third-party "date registered" values for these blocks (e.g. maclookup.app shows 2023-06-22, 2024-11-14, 2026-01-06) are database artifacts, not IEEE facts — none is stated here. [Confirmed] — enrichment/registries/oui.csv; https://standards.ieee.org/products-programs/regauth/

Company status

active; brand formerly "AfterShokz" (US HQ East Syracuse, NY), rebranded to "Shokz" in December 2021. Bone-conduction technology originated at Shenzhen Voxtech (~2001, military/law-enforcement use); first Bluetooth bone-conduction headphones debuted at CES 2013 [Confirmed] — https://ca.shokz.com/pages/about-us; https://mister-gadget.net/en/feature-shokz/

Parent / related entity

Shenzhen Voxtech Co., Ltd. is cited as the bone-conduction technology originator with which the Shokz brand is associated; "Shenzhen Shokzhear Co., Ltd" (OUI 24:68:30) is a separate registrant name at the same address [Likely — parent relationship is single-/low-corroboration across third-party pages] — https://baike.baidu.com/en/item/Shokz/1460226; https://ca.shokz.com/pages/about-us

Device types

bone-conduction headphones, open-ear headphones/earbuds, communication headsets, swimming headphones — all Bluetooth; no Wi-Fi, networking, IoT, or enterprise gear [Confirmed] — https://shokz.com/; https://ca.shokz.com/pages/about-us

Notable products

OpenRun / OpenRun Pro bone-conduction headphones; OpenFit open-ear earbuds; OpenSwim swimming headphones [Likely] — https://shokz.com/ (product-line names from current catalog; line membership may shift with catalog updates)

Bluetooth chipset

an OpenRun Pro (model S810) teardown identified a Qualcomm QCC3024 Bluetooth 5.1 audio SoC. Shokz does not publicly disclose chipset vendors across product lines, so this is not generalizable to the whole catalog [Likely — single teardown of one model] — https://www.techinsights.com/products/ddt-2202-810

Security context

No Shokz-specific CVEs or confirmed vulnerabilities found. Shokz is NOT named among the affected brands in the Dec 2025 Airoha SoC "RACE" Bluetooth-audio disclosure (CVE-2025-20700 / CVE-2025-20701 / CVE-2025-20702), which lists other brands (Sony, Bose, Jabra, JBL, Marshall, etc.) using Airoha chipsets; the one published Shokz teardown shows a Qualcomm QCC3024, not an Airoha chip. Generic Bluetooth proximity risks (eavesdropping, pairing spoofing) apply to all consumer BT audio. [Likely — "not named" is absence-of-evidence, corroborated across multiple security writeups] — https://insinuator.net/2025/12/bluetooth-headphone-jacking-full-disclosure-of-airoha-race-vulnerabilities/; https://cyberinsider.com/exploit-tool-for-bluetooth-flaws-impacting-millions-of-headphones-now-available/; https://www.techinsights.com/products/ddt-2202-810

Management software

"Shokz Connect" is a local PC-based device-management tool (firmware updates / device configuration; enterprise .msi installer available) — a local BT management utility, not a cloud service that changes network posture [Confirmed] — https://pro.shokz.com/pages/shokz-connect

Threat level

Low — consumer BT audio peripherals are not network nodes and do not traverse IP networks independently; a Shokz OUI on a network indicates a paired audio device, not an intrusion. [Confirmed]

IANA reference

none — IANA governs IP/port assignments, not IEEE MAC OUI blocks (IANA Reference column stays blank) [Confirmed]

MA-M / MA-S

none — no Shokz or Shokzhear assignments in MA-M (mam.csv) or MA-S (oui36.csv) [Confirmed] — enrichment/registries/mam.csv, enrichment/registries/oui36.csv

Analyst note

A Shokz OUI maps reliably to a Shokz-branded Bluetooth audio accessory (the brand assigns these blocks to its own finished products). Because the devices are Bluetooth-only, they won't present an IP-layer MAC on Wi-Fi — a Shokz OUI in a Wi-Fi/wired capture is anomalous and worth investigating. Host-side Wi-Fi MAC randomization is a separate concern and does not affect this vendor mapping.