This is the canonical chipset-OUI case for Batch 007, and it resolves the consolidation question: there is no standalone "Allterco" or "Shelly" IEEE registrant. Shelly devices surface on networks under "Espressif Inc." because the ESP8266/ESP32 Wi-Fi chip carries the burned-in MAC and Espressif is the IEEE registrant (Espressif holds ~315 MA-L blocks). A real Shelly device, for example, presents an Espressif prefix such as 50:02:91. The corporate parent is Shelly Group SE (formerly Allterco JSCo), based in Sofia, Bulgaria; the chips themselves come from Espressif (Shanghai). These devices are Wi-Fi smart relays/switches, smart plugs, energy meters (e.g., Shelly Pro 3EM), and sensors — the Shelly Plus line is ESP32-based — and Shelly is hugely popular with the Home Assistant / DIY smart-home community. A nuance worth noting: Allterco announced in 2023 it is co-developing a customized "Shelly chip" with Espressif, but Espressif still designs and manufactures it, so the OUI remains Espressif's. For triage, an Espressif OUI cannot be assumed to be a Shelly — it could be a Sonoff, a DIY ESP project, or dozens of other brands — so treat Espressif OUIs as "generic ESP IoT device" and disambiguate by hostname (e.g., "shelly-…"), open ports, and mDNS.
- IEEE assignment
- NONE of its own — Shelly 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 Shelly/Allterco registrant; Espressif holds ~315 MA-L blocks [Confirmed] — maclookup.app/vendors/espressif-inc
- HQ / country
- corporate parent Shelly Group SE (formerly Allterco JSCo), Sofia, Bulgaria; chips from Espressif (Shanghai, China) [Confirmed] — corporate.shelly.com
- Company status
- Allterco / Shelly Group active (rebranded corporately toward "Shelly Group"); Espressif Inc. active [Confirmed] — corporate.shelly.com
- Device types
- Wi-Fi smart relays/switches, smart plugs, energy meters, sensors [Confirmed] — maclookup.app
- Notable products
- Shelly 1/1PM, Shelly Plus line (ESP32-based), Shelly Pro 3EM, Shelly TRV, Shelly Motion
- Verified prefix sample (Espressif, as seen on a real Shelly device)
- 50:02:91 [Confirmed] — maclookup.app
- Special note
- Canonical chipset-OUI case (like Sonoff). Allterco announced co-developing a customized "Shelly chip" with Espressif (2023), but Espressif still designs/manufactures it — OUI remains Espressif's. The IEEE registry publishes no assignment dates, so none is stated here. [Confirmed]
- Related vendors
- Espressif (chipset/OUI source); Sonoff/ITEAD and Tuya (sibling pattern — ESP-based brands surfacing under Espressif)
- Analyst note
- An Espressif OUI cannot be assumed to be a Shelly — it could be Sonoff, a DIY ESP project, or dozens of other brands. Treat Espressif OUIs as "generic ESP IoT device" requiring secondary fingerprinting (hostname like "shelly-…", open ports, mDNS).