The Chamberlain Group, Inc. — 4 prefixes (MA-L)

The Chamberlain Group, Inc. holds four IEEE MA-L (24-bit OUI) blocks — 0C:95:05, 44:11:46, 64:52:99, and CC:6A:10 — all registered to the company at its 300 Windsor Drive, Oak Brook, Illinois headquarters. Chamberlain is a US manufacturer of intelligent access solutions, selling residential and commercial garage door openers and gate operators under the Chamberlain, LiftMaster, Merlin, and Grifco brands, all of which connect through its myQ smart-home cloud platform. Devices carrying these prefixes are almost always Wi-Fi-enabled myQ endpoints: smart garage hubs, Internet gateways (LiftMaster 828LM, Chamberlain CIGBU), smart garage controls (myQ-G0401), and door/gate controllers. They are consumer/SMB IoT units that join a 2.4 GHz Wi-Fi network and initiate outbound connections to myQ cloud services, talking to door sensors over proprietary RF — they are not networking infrastructure, so their appearance on an enterprise segment is worth a second look. A separate, older MA-L block, 00:15:25, is registered to "Chamberlain Access Solutions" at a Scottsdale, Arizona address and appears to be a legacy or predecessor entity rather than the modern Oak Brook company. The product line also carries a documented security history (RF jamming and earlier encryption gaps on myQ), so OUI-based asset classification should be paired with awareness that these are exposed IoT devices, not trusted infrastructure.

IEEE assignment

4 MA-L prefixes (0C:95:05, 44:11:46, 64:52:99, CC:6A:10) → The Chamberlain Group, Inc., 300 Windsor Drive, Oak Brook, IL 60523, US [Confirmed] — IEEE MA-L / hwaddress.com

Registry / block size

MA-L (24-bit OUI); 4 blocks (~16.78M addresses each). IEEE publishes NO assignment/registration date; third-party tools (maclookup.app cites "26 November 2011" for one prefix) are database artifacts, not IEEE facts. [Confirmed registry class; date Unknown] — hwaddress.com, maclookup.app

HQ / country

300 Windsor Drive, Oak Brook, IL 60523, US [Confirmed] — IEEE MA-L / chamberlaingroup.com

Company status

active; majority-owned by Blackstone since Nov 2021; 6,000+ employees, 60+ locations [Confirmed] — chamberlaingroup.com, zoominfo.com

Device types

Wi-Fi garage door openers, smart garage hubs (myQ-G0401), Internet gateways (LiftMaster 828LM, Chamberlain CIGBU), gate entry controllers, commercial door operators — all on the myQ cloud platform via 2.4 GHz Wi-Fi [Confirmed] — support.chamberlaingroup.com, chamberlain.com/myq

Notable products / brands

Chamberlain, LiftMaster, Merlin, Grifco; myQ smart-home platform [Confirmed] — chamberlaingroup.com

Legacy / related registration

00:15:25 → "Chamberlain Access Solutions," 8271 E. Gelding Drive, Scottsdale, AZ 85260, US — appears to be a legacy/predecessor entity, kept distinct from the modern Oak Brook company [Likely] — IEEE MA-L

Security note

myQ has a documented security history — a 2019 RF jamming vulnerability (door can be held open; partial mitigation in myQ App v4.145.1.36946, warning only) and earlier (~2015) reports of missing encryption / MITM + replay exposure on myQ Garage; CVE records exist (cvedetails product ID 135936)

[Confirmed] — mcafee.com (Trellix research), cvedetails.com, pcworld.com

Analyst note

A device on these prefixes is almost certainly a Chamberlain/LiftMaster myQ unit — a consumer/SMB IoT endpoint making outbound calls to myQ cloud. Presence on a corporate/enterprise network is anomalous and warrants review; treat as an exposed IoT device, not infrastructure.

[Confirmed] — support.chamberlaingroup.com