The OUI prefix BC:AF:87 is registered to "smartAC.com, Inc." as an MA-L (24-bit) block in the IEEE registry, with the registry address 5302 Egbert St, Houston, TX 77007, US. SmartAC.com is a Houston, Texas company (founded ~2019, exited stealth June 2020) that builds residential HVAC predictive-maintenance hardware: a Wi-Fi-connected hub plus up to seven wireless sensors. The sensors cover comfort (temperature and relative humidity, magnetic-mounted on an air register), filter airflow (an air-pressure sensor behind the return filter that reads roughly every ten seconds), and water (moisture detection in the AC drain pan). The hub connects to a home network over 2.4 GHz Wi-Fi or optional Ethernet and pushes sensor telemetry to the SmartAC.com cloud for machine-learning HVAC-health analysis; the sensor-to-hub link is described in public reviews only as a "proprietary IoT network operating in the 2.4 GHz spectrum," with no chip vendor, module, or standard protocol (Zigbee, Z-Wave, Bluetooth) disclosed. For network triage: BC:AF:87 on a residential LAN indicates an HVAC monitoring hub — a cloud-connected but low-attack-surface device; on a corporate LAN it reads as shadow-IT / BYOD. No public CVEs or security advisories were found for SmartAC devices.
- IEEE assignment
- BC:AF:87 → smartAC.com, Inc., MA-L block [Confirmed] — enrichment/registries/oui.csv line 747
- Registry / block size
- MA-L (24-bit OUI, ~16.7M addresses per prefix) [Confirmed] — enrichment/registries/oui.csv line 747. NOTE: IEEE publishes NO assignment/registration date (oui.csv columns are only Registry, Assignment, Organization Name, Organization Address); any "date registered" on a third-party MAC tool is a database artifact, not an IEEE fact. allocated_date stays null.
- Registry address
- 5302 Egbert St, Houston, TX 77007, US [Confirmed] — enrichment/registries/oui.csv line 747 (corroborated by Dun & Bradstreet business directory)
- HQ / country
- Houston, Texas, US [Likely] — https://www.dnb.com/business-directory/company-profiles.smartaccom_inc.527dd45c7e1cac37c305652cb6624797.html, https://www.crunchbase.com/organization/smartac-com-inc
- Company status
- active as of June 2026; founded ~2019, exited stealth June 2020 (founder/CEO Josh Teekell) [Confirmed] — https://businesswire.com/news/home/20200602005334/en/SmartAC.com-Exits-Stealth-Time-Summer-DIY-HVAC, https://www.crunchbase.com/organization/smartac-com-inc
- Device types
- residential HVAC IoT monitoring hub + wireless sensors (Comfort temp/RH sensor, Filter airflow/pressure sensor, Water drain-pan moisture sensor); hub supports up to 7 sensors [Confirmed] — https://www.techhive.com/article/578601/smartaccom-says-its-sensors-and-service-can-predict-hvac-maintenance-needs.html, https://www.digitaltrends.com/home/monitor-your-hvac-system-with-smartaccom-smart-sensors/
- Connectivity
- hub uses 802.11 Wi-Fi (2.4 GHz) + optional Ethernet; sensor-to-hub link is a proprietary 2.4 GHz RF protocol (NOT confirmed Zigbee/Z-Wave/BLE); telemetry uploads to SmartAC.com cloud [Likely] — https://www.techhive.com/article/578601/smartaccom-says-its-sensors-and-service-can-predict-hvac-maintenance-needs.html
- Industry / use case
- residential HVAC predictive maintenance and HVAC-contractor SaaS (remote monitoring + membership platform); monitoring plans from ~$5/month [Confirmed] — https://www.smartac.com/our-platform, https://www.techhive.com/article/578601/smartaccom-says-its-sensors-and-service-can-predict-hvac-maintenance-needs.html
- Security context
- no public CVEs or advisories found (June 2026); hub can be installed over Ethernet so a technician needs no Wi-Fi password; no end-to-end encryption details disclosed publicly [Likely] — https://www.techhive.com/article/578601/smartaccom-says-its-sensors-and-service-can-predict-hvac-maintenance-needs.html
- Website
- https://www.smartac.com [Confirmed] — https://www.smartac.com/our-platform
- mam.csv / oui36.csv
- no MA-M or MA-S match for smartAC.com (a mam.csv hit "Dongguan SmartAction Technology Co.,Ltd" prefix 4C:BC:98:B is a different company) [Confirmed] — enrichment/registries/mam.csv, enrichment/registries/oui36.csv
- Analyst note
- BC:AF:87 is a genuine first-party IEEE block for SmartAC.com. Seeing it on a residential LAN = HVAC monitoring hub; on a corporate LAN = shadow-IT signal. Sensors do not carry this OUI directly (they ride a proprietary RF link to the hub). [Likely] — https://www.smartac.com/our-platform, https://www.crunchbase.com/organization/smartac-com-inc