AltoBeam holds 50 MA-L blocks (about 838.9 million addresses) registered across three IEEE entity-name variants that should be aliased to one maker: "AltoBeam Inc." (the majority), "AltoBeam (China) Inc.", and "AltoBeam (Xiamen) Technology Ltd, Co." (the single OUI DC:29:19). The first two carry the same registry address — B808, Tsinghua Tongfang Hi-Tech Plaza, Haidian, Beijing 100083, China — while the Xiamen entity is registered at Huoju High-tech District, Xiamen 361000. AltoBeam is a fabless semiconductor company (founded April 2007, R&D in Beijing's Tsinghua Science Park) whose ATBM-series Wi-Fi SoCs are embedded in IP security cameras, video doorbells, smart locks, smart-home appliances, OTT set-top boxes, internet TVs, and drones — it does not build finished consumer devices but supplies silicon to OEMs. The key analyst point is the chipset pattern: an AltoBeam OUI identifies AltoBeam silicon regardless of the brand on the box, and because these chips are common in budget IP cameras, doorbells, and locks, an AltoBeam OUI strongly suggests a low-cost networked IoT endpoint of exactly the device class with a well-documented history of weak/default credentials and exposed RTSP/ONVIF surfaces. That risk is class-level, not a confirmed AltoBeam-specific flaw: no AltoBeam chipset or firmware CVE could be verified in public sources as of June 2026. For triage, an AltoBeam OUI in ARP/DHCP means a low-cost Wi-Fi IoT endpoint (most often a camera, doorbell, or lock) built on AltoBeam silicon — classify it as IoT/surveillance, not as a specific brand, and treat it as the category that warrants credential and firmware checks.
- IEEE assignment
- 50 prefixes → three entity names ("AltoBeam Inc." majority, "AltoBeam (China) Inc.", "AltoBeam (Xiamen) Technology Ltd, Co." for DC:29:19), registered China [Confirmed] — IEEE MA-L (file:enrichment/registries/oui.csv)
- Registry / block size
- MA-L (24-bit OUI); 50 blocks (~838.9M addresses); none in MA-M or MA-S (mam.csv / oui36.csv) [Confirmed] — file:enrichment/registries/oui.csv, mam.csv, oui36.csv. NOTE: IEEE's public OUI data publishes NO assignment/registration date (columns are only Registry, Assignment, Organization Name, Organization Address); third-party "date registered" values (e.g., maclookup.app showing 2020-07-25 for B4:FB:E3) are database artifacts, not IEEE facts.
- HQ / country
- B808, Tsinghua Tongfang Hi-Tech Plaza, Haidian, Beijing 100083, China (primary registry address); Xiamen entity at Huoju High-tech District, Xiamen 361000, China [Confirmed] — IEEE MA-L (file:enrichment/registries/oui.csv)
- Company status
- active fabless semiconductor company; founded April 2007; R&D in Tsinghua Science Park, Beijing; branches in Shenzhen, Xiamen, San Jose (US), Seoul (KR) [Confirmed] — https://www.altobeam.com/en/ , https://www.wpgholdings.com/productline/detail/en/ALTOBEAM
- Device types
- Wi-Fi/BLE IoT SoCs (ATBM series) embedded by OEMs in IP cameras, video doorbells, smart locks, smart-home appliances, OTT set-top boxes, internet TVs, drones; also DTMB/DVB DTV demodulators and silicon TV tuners [Confirmed] — https://www.wpgholdings.com/productline/detail/en/ALTOBEAM , https://manuals.plus/altobeam/atbm6461-wi-fi-and-ble-module-manual , https://www.accio.com/supplier/altobeam-china-inc
- Notable products
- ATBM6461 (Wi-Fi 6 + BLE, marketed for battery-powered cameras/doorbells), ATBM6431/ATBM6421 (smart home / smart grid / industrial control), ATBM602x series (Wi-Fi 4, mass production from 2017) [Confirmed] — https://manuals.plus/altobeam/atbm6461-wi-fi-and-ble-module-manual , https://medium.com/@ioteventinchina/industry-trend-another-domestic-manufacturer-launches-new-wifi6-chip-for-low-power-ipc-6271554497c5
- Wireless standards
- IEEE 802.11b/g/n (Wi-Fi 4) on ATBM602x; 802.11ax (Wi-Fi 6) on ATBM6461/ATBM6431; Bluetooth LE 4.2 / 5.0 combo parts [Confirmed] — https://manuals.plus/altobeam/atbm6461-wi-fi-and-ble-module-manual , https://www.altobeam.com/en/contents/79/112.html
- Verified prefix sample (all MA-L)
- 4C:37:DE, 7C:AA:DE, B4:FB:E3, DC:29:19 (Xiamen entity), F4:B1:9C, 6C:A6:13 [Confirmed] — file:enrichment/registries/oui.csv
- Special note
- Chipset-OUI flag. An AltoBeam OUI identifies AltoBeam silicon regardless of brand; the chips are common in budget IP cameras, video doorbells, and smart locks, so an AltoBeam OUI strongly suggests a low-cost IoT/surveillance endpoint. Alias the three entity names to one maker. The IEEE registry publishes no assignment dates, so none is stated here. [Confirmed]
- Security context
- No AltoBeam-specific chipset/firmware CVE found in NVD as of June 2026. Class-level risk only: AltoBeam silicon is heavily deployed in IP cameras/doorbells/locks — a device category with documented weak/default credentials and exposed ONVIF/RTSP surfaces. A KTH thesis analysing a Deltaco SH-IPC05 camera mapped its MAC to an AltoBeam OUI and found default admin:admin access — characteristic of OEM integration, not a vendor-specific defect. [Likely] — single-source for the device example: https://kth.diva-portal.org/smash/get/diva2:1697718/FULLTEXT01.pdf
- Related vendors
- chipset/IoT cross-reference — Espressif, Beken, Bouffalo Lab (Wi-Fi SoC peers whose OUIs likewise flag silicon, not brand); surveillance-device cross-reference where relevant
- Analyst note
- An AltoBeam OUI in ARP/DHCP means a low-cost Wi-Fi IoT endpoint built on AltoBeam silicon — most often an IP camera, video doorbell, or smart lock. Classify as IoT/surveillance, not a specific brand, and treat it as the device class that warrants credential and firmware-update checks. The brand on the box is unknown from the OUI.