Telink's MAC footprint spans two IEEE legal entities that should be aliased to one maker: "Telink Semiconductor (Shanghai) Co., Ltd." (9 blocks, about 151 million addresses) and "Telink Semiconductor (Taipei) Co. Ltd." (1 block, A4:C1:38). Verified samples for the Shanghai entity include C4:19:D1, 3C:CF:B4, 40:62:34, 40:99:F6, 4C:A0:D4, CC:7D:5B, CC:AC:FE, D8:0B:CB, and D8:5F:77, plus A4:C1:38 for the Taipei entity. These OUIs appear on BLE, Zigbee, Thread, Bluetooth-mesh, and 2.4 GHz SoCs — extremely common in smart-home devices (bulbs, sensors, switches, remotes), Bluetooth peripherals, and IoT. The key analyst point is the chipset pattern: a Telink OUI identifies a device built on Telink connectivity silicon regardless of the brand on the box, very commonly white-label or Tuya-ecosystem smart-home gear (Zigbee/BLE bulbs, sensors, remotes), so the device's retail brand will usually differ from "Telink." This cross-references the existing Tuya, Espressif, and Beken smart-home entries. For triage, a Telink OUI — especially A4:C1:38 and C4:19:D1 — is a chipset flag for white-label smart-home gear, and with 9 blocks under the Shanghai entity it is a high-frequency smart-home signal.
- IEEE assignment
- two entities — "Telink Semiconductor (Shanghai) Co., Ltd." (9) + "Telink Semiconductor (Taipei) Co. Ltd." (1, A4:C1:38) [Confirmed] — IEEE MA-L
- Registry / block size
- MA-L; 9 blocks (~151M) Shanghai + 1 block Taipei [Confirmed] — maclookup.app (IEEE-sourced)
- HQ / country
- Shanghai, China (Shanghai entity); Taipei, Taiwan (Taipei entity) [Confirmed] — maclookup.app
- Company status
- active; fabless connectivity-silicon maker [Confirmed] — telink-semi.com
- Device types
- BLE, Zigbee, Thread, Bluetooth-mesh, 2.4 GHz SoCs — common in smart-home (bulbs, sensors, switches, remotes), Bluetooth peripherals, IoT [Confirmed] — maclookup.app
- Notable products
- BLE/Zigbee/Thread/Bluetooth-mesh connectivity SoCs
- Verified prefix sample
- C4:19:D1, 3C:CF:B4, 40:62:34, 40:99:F6, 4C:A0:D4, CC:7D:5B, CC:AC:FE, D8:0B:CB, D8:5F:77 (Shanghai); A4:C1:38 (Taipei) [Confirmed] — maclookup.app
- Special note
- Chipset-OUI flag. A Telink OUI identifies a device built on Telink connectivity silicon regardless of brand, very commonly white-label or Tuya-ecosystem smart-home gear. Two legal entities (Shanghai + Taipei) — alias them; A4:C1:38 (Taipei) is one of the most-seen smart-home OUIs. The IEEE registry publishes no assignment dates, so none is stated here. [Confirmed]
- Related vendors
- smart-home ecosystem cross-reference — Tuya, Espressif, Beken
- Analyst note
- A Telink OUI (esp. A4:C1:38, C4:19:D1) is a chipset flag for white-label/Tuya-ecosystem smart-home gear (Zigbee/BLE bulbs, sensors, remotes); the retail brand will usually differ from "Telink." With 9 blocks under the Shanghai entity, a high-frequency smart-home signal.