Barrot — 10 prefixes (MA-L); Bluetooth / Wi-Fi SoC maker, OUI ≠ device brand

Barrot Technology Co., Ltd. (registered with minor casing variation as "Barrot Technology Co.,Ltd." and "Barrot Technology Co.,LTD", and abroad as Barrot Technology Limited) holds 10 MA-L blocks registered to Haidian District, Beijing, China — eight to A1009, Block A, Jia Hua Building, No.9 Shangdi 3rd Street (also rendered "No.9 Shangdisanjie St"), and the earliest block, 04:7F:0E, to an older address at C7-1-1, East Area, No.2 Shangdi Xinxi Road. Barrot is a fabless Bluetooth and Wi-Fi connectivity vendor: it ships Bluetooth SoCs, BT + Wi-Fi combo modules, USB Bluetooth adapters, protocol stacks, and audio algorithms targeting automotive electronics (infotainment, digital keys, T-Box, EV charging) and IoT (set-top boxes, remote controls, wearables, medical/health, energy storage). The key analyst point is the chipset pattern: a Barrot OUI identifies Barrot silicon regardless of the brand on the box. A concrete consumer example is the BR8554 Bluetooth 5.4 chip, which is present in UGREEN CM748/CM749 USB adapters; that chip is also the subject of a well-documented Linux interoperability defect (HCI init fails with "Connection timed out") that requires a kernel-level workaround — an engineering bug, not a security vulnerability, and no CVE has been assigned. For triage, a Barrot OUI in ARP/DHCP or a Bluetooth scan means a Barrot connectivity part (often a BT adapter, automotive module, or IoT endpoint) — classify it as a connectivity SoC, not as a specific device brand.

IEEE assignment

10 prefixes → "Barrot Technology Co.,Ltd." / "Barrot Technology Co.,LTD", registered Haidian District, Beijing, China [Confirmed] — IEEE MA-L

Registry / block size

MA-L (24-bit OUI); 10 blocks (~167.8M addresses) [Confirmed] — IEEE MA-L; not found in MA-M (the IEEE MA-M registry) or MA-S (the IEEE MA-S registry) registries

Prefixes (all MA-L)

04:7F:0E, 10:23:81, 14:D7:25, 28:D4:1E, 30:4A:C4, 60:6E:41, E8:40:74, EC:8F:72, EC:A7:AD, F8:6B:14 [Confirmed] — IEEE MA-L

HQ / country

A1009, Block A, Jia Hua Building, No.9 Shangdi 3rd Street (also "No.9 Shangdisanjie St"), Haidian District, Beijing, China CN 100000; block 04:7F:0E carries an older registry address C7-1-1, East Area, No.2 Shangdi Xinxi Road, Haidian District, Beijing CN 100085

[Confirmed] — IEEE MA-L, http://en.barrot.com.cn/

Company status

active fabless Bluetooth/Wi-Fi connectivity vendor [Confirmed] — http://en.barrot.com.cn/

Device types

Bluetooth SoCs, BT + Wi-Fi combo modules, USB Bluetooth adapters, protocol stacks, audio algorithms; application domains automotive (infotainment, digital key, T-Box, EV charging) and IoT (set-top box, remote, wearable, medical, energy storage) [Confirmed] — http://en.barrot.com.cn/

Notable products

BR8554 Bluetooth 5.4 SoC — present in UGREEN CM748/CM749 USB adapters (USB VID 0x33FA / PID 0x0010) [Confirmed] — https://the-sz.com/products/usbid/index.php?v=0x33FA , https://iifx.dev/en/articles/460057614/workaround-for-barrot-br8554-chipset-issue-conditional-hci-command-skip-in-linux

Bluetooth SIG / standards posture

self-describes as a premium Bluetooth-alliance member, states its founding team has 15+ years in Bluetooth spec work and claims to be the only mainland-China company involved in developing Bluetooth core specifications; certification claimed through BT v5.4 — vendor self-description, single-source

[Likely] — http://en.barrot.com.cn/

Verified prefix sample

EC:A7:AD, 14:D7:25, F8:6B:14, 60:6E:41 [Confirmed] — IEEE MA-L

Security context

no Barrot-specific CVE or disclosed vulnerability located as of 2026-06. The BR8554 (USB 0x33FA/0x0010) fails Linux HCI init when the kernel sends Read_Local_Extended_Features, yielding "Connection timed out (110)"; a community kernel patch (hci_sync.c) exists for affected UGREEN CM748/CM749 adapters. This is a firmware/interoperability defect, not a security vulnerability; no CVE assigned [Confirmed] — https://iifx.dev/en/articles/460057614/workaround-for-barrot-br8554-chipset-issue-conditional-hci-command-skip-in-linux , https://github.com/nwrafael/CM748-ugreen-bluetooth-adapter-patch-linux

Registration date

Unknown — IEEE publishes no assignment dates in the OUI registry; "date registered" values shown by third-party lookup tools (e.g. maclookup.app) are database artifacts, not IEEE facts, and none is stated here [Confirmed]

Special note

Chipset-OUI flag. A Barrot OUI identifies Barrot silicon regardless of brand; the org name appears with casing variation (Ltd. vs LTD) across assignments — same entity. The IEEE registry publishes no assignment dates, so none is stated. [Confirmed]

Related vendors

Airoha, Beken, BES/Bestechnic, Bluetrum (peer Chinese Bluetooth/Wi-Fi SoC makers)

Analyst note

A Barrot OUI in ARP/DHCP or a Bluetooth scan means a Barrot connectivity part (often a USB BT adapter, automotive module, or IoT endpoint) — classify as a connectivity SoC, not a specific device brand.