Sonoff follows the same chipset-OUI pattern as Shelly, and it resolves the consolidation question: there is no standalone "ITEAD" or "Sonoff" IEEE registrant. Sonoff devices surface on networks under "Espressif Inc." because the ESP Wi-Fi chip carries the burned-in MAC and Espressif is the IEEE registrant. ITEAD is based in Shenzhen, China, while the OUI belongs to Espressif (China). These devices are Wi-Fi smart switches/relays, smart plugs, RF bridges, and sensors — the Sonoff Basic, Mini, TH16, and RF Bridge, managed through the eWeLink app. A nuance worth flagging for analysts: Sonoff's setup access point uses an "ITEAD-XXXXXXXX" SSID, but that is not an IEEE registrant — the burned-in MAC is Espressif's (Tasmota's own documentation tells users the MAC vendor is most likely Espressif). For triage, an Espressif OUI is necessary but not sufficient to call a device a Sonoff; use the Sonoff DIY port (8081) and eWeLink/Tasmota fingerprints to disambiguate from Shelly and other ESP-based brands.
- IEEE assignment
- NONE of its own — Sonoff devices surface under "Espressif Inc." (the ESP chip carries the burned-in MAC) [Confirmed negative finding] — maclookup.app
- Registry / block size
- N/A for a standalone Sonoff/ITEAD registrant; Espressif holds ~315 MA-L blocks [Confirmed] — maclookup.app/vendors/espressif-inc
- HQ / country
- ITEAD in Shenzhen, China; OUI belongs to Espressif Inc. (China) [Confirmed] — tasmota.github.io
- Company status
- ITEAD active; Espressif active [Confirmed] — maclookup.app
- Device types
- Wi-Fi smart switches/relays, smart plugs, RF bridges, sensors [Confirmed] — maclookup.app
- Notable products
- Sonoff Basic, Sonoff Mini, Sonoff TH16, Sonoff RF Bridge (eWeLink app)
- Special note
- Same chipset-OUI pattern as Shelly. Sonoff's setup AP uses an "ITEAD-XXXXXXXX" SSID, but that is not an IEEE registrant — the burned-in MAC is Espressif's. Tasmota docs explicitly note the "MAC Vendor most likely is Espressif." The IEEE registry publishes no assignment dates, so none is stated here. [Confirmed]
- Related vendors
- Espressif (chipset/OUI source); Shelly (sibling ESP-based pattern)
- Analyst note
- An Espressif OUI is necessary but not sufficient to call a device a Sonoff; use the Sonoff DIY port (8081) and eWeLink/Tasmota fingerprints to disambiguate.