Enterasys — 4 prefixes (MA-L)

A MAC address starting with 20:B3:99, 00:1F:45, 00:11:88, or 00:01:F4 belongs to Enterasys, a discontinued enterprise networking vendor, typically seen on legacy routers, Ethernet switches, and 802.11 wireless access points/controllers shipped before the company's 2013 acquisition.

Enterasys Networks was spun off from Cabletron Systems in March 2000 and traded on the NYSE under the ticker ETS from August 2001. It built enterprise-grade switches, routers, wireless APs/controllers, and network management/security software (NetSight Console, intrusion prevention, network access control).

The company was acquired by Extreme Networks around September 12, 2013 for roughly $180 million, ending its run as an independent entity. Legacy Enterasys-branded hardware continued to see support under Extreme Networks for a period afterward, but Enterasys itself is not an active company today.

IEEE's registry lists four MA-L blocks split across two facility addresses: 20:B3:99 and 00:1F:45 at 50 Minuteman Rd, Andover, MA; and 00:11:88 and 00:01:F4 at 35 Industrial Way, Rochester, NH. IEEE's public the IEEE MA-L registry does not publish assignment dates — any per-prefix "date registered" shown on third-party lookup sites is a database artifact, not an IEEE fact.

Multiple historical CVEs (2002–2013) against named Enterasys products — including the SSR8000 router, XSR-1800 router, Vertical Horizon VH-2402S switch, and NetSight Console — further corroborate that these OUIs identify real, shipped enterprise networking gear rather than a bare unused registration.

IEEE assignment

4 MA-L prefixes → "Enterasys" [Confirmed] — the IEEE MA-L registry (lines 10114, 10684, 10685, 26488)

Registry / block size

MA-L (24-bit OUI) only; no MA-M/MA-S blocks found [Confirmed] — the IEEE MA-L registry, the IEEE MA-M registry, the IEEE MA-S registry

HQ / registered addresses

50 Minuteman Rd, Andover, MA, US 01810 (20:B3:99, 00:1F:45); 35 Industrial Way, Rochester, NH, US 03867 (00:11:88, 00:01:F4) [Confirmed] — the IEEE MA-L registry. NOTE: IEEE's public OUI data (the IEEE MA-L registry: Registry, Assignment, Organization Name, Organization Address) publishes NO assignment/registration date; any "date registered" from third-party tools (e.g. maclookup.app) is a database artifact, not an IEEE fact.

Company status

defunct (acquired by Extreme Networks, ~Sept 12, 2013, ~$180M) [Likely] — en.wikipedia.org/wiki/Enterasys_Networks

Device types

routers, Ethernet switches, 802.11 wireless APs/controllers, network management/security software [Likely — corroborated by CVE product names] — Wikipedia; NVD CVE records (services.nvd.nist.gov/rest/json/cves/2.0?keywordSearch=Enterasys)

Notable products

SSR8000 router, XSR-1800 router, Vertical Horizon VH-2402S switch, NetSight Console [Confirmed — named in CVE records] — NVD REST API

Verified sample prefixes (all MA-L, Enterasys)

20:B3:99, 00:1F:45, 00:11:88, 00:01:F4 [Confirmed] — the IEEE MA-L registry

Security context

8 legacy CVEs 2002–2013 (CVE-2002-1501, CVE-2004-0674, CVE-2005-2026, CVE-2005-2027, CVE-2007-2343, CVE-2007-2344, CVE-2011-5227, CVE-2013-7312), none currently active [Confirmed] — NVD REST API

Related vendors

Cabletron Systems, Inc. (predecessor; separate OUIs 00:00:1D, 00:60:BB); Extreme Networks, Inc. (acquirer; separate MA-L entries) [Confirmed] — the IEEE MA-L registry

Analyst note

Four confirmed MA-L blocks across two facility addresses plus a well-documented corporate history and real historical CVE trail establish genuine company substance well above a bare single-OUI shell.