Extreme Networks holds about 94 MA-L blocks registered as "Extreme Networks Headquarters" (and "Extreme Networks, Inc.") at 2121 RDU Center Drive, Morrisville, NC. Verified samples include 00:04:96, 20:9E:F7, DC:E6:50, and 00:B8:1D. These OUIs appear on enterprise/campus switches, Wi-Fi access points, and network-management appliances. Like Zebra, Extreme's OUI generally maps to its brand, but its lineage is complex because it has absorbed several legacy networking companies: it acquired Enterasys (an all-cash transaction valued at $180 million, closing 31 October 2013), Zebra's WLAN business (2016), Avaya's networking business and Brocade's data-center (SLX/VDX) networking business (both 2017), and Aerohive Networks (~$272 million aggregate, tender offer closing 9 August 2019). As a result, legacy OUIs on a given device may trace to Enterasys, Avaya/Nortel (the ERS/VSP lines), Brocade (SLX/VDX), or Aerohive depending on the device's heritage. For triage, an Extreme OUI is an enterprise-infrastructure signal (a switch or AP), and older devices may still report Enterasys, Avaya, Brocade, or Aerohive OUIs.
- IEEE assignment
- "Extreme Networks Headquarters" / "Extreme Networks, Inc." (~94), registered Morrisville, NC, US [Confirmed] — IEEE MA-L
- Registry / block size
- MA-L; ~94 blocks [Confirmed] — maclookup.app (IEEE-sourced)
- HQ / country
- 2121 RDU Center Drive, Morrisville NC 27560, US [Confirmed] — maclookup.app
- Company status
- active; acquired Enterasys ($180M, closed 2013-10-31), Zebra WLAN (2016), Avaya networking + Brocade DC networking (2017), Aerohive (~$272M, closed 2019-08-09) [Confirmed] — SEC filings, Aerohive press release
- Device types
- enterprise/campus switches, Wi-Fi access points, network management [Confirmed] — maclookup.app
- Notable products
- ExtremeSwitching, ExtremeWireless APs, ExtremeCloud management
- Verified prefix sample
- 00:04:96, 20:9E:F7, DC:E6:50, 00:B8:1D [Confirmed] — maclookup.app, macverify.com
- Special note
- Multi-lineage — legacy OUIs may trace to Enterasys, Avaya/Nortel (ERS/VSP lines), Brocade (SLX/VDX), or Aerohive depending on the device's heritage. OUI generally maps to brand. The IEEE registry publishes no assignment dates, so none is stated here. [Confirmed]
- Related vendors
- Enterasys, Avaya networking, Brocade DC networking, Aerohive (all absorbed)
- Analyst note
- An Extreme OUI is an enterprise-infrastructure signal (switch/AP). Older devices may still report Enterasys/Avaya/Brocade/Aerohive OUIs.