CERN (European Organization for Nuclear Research) — 2 prefixes (MA-L)

A MAC address beginning 80:D3:36 or 08:00:30 belongs to CERN, the European Organization for Nuclear Research, headquartered in Geneva, Switzerland. Both prefixes are IEEE MA-L (24-bit OUI) blocks registered directly to CERN, confirmed against the project's cached IEEE OUI registry and cross-checked against a third-party mirror (maclookup.app).

CERN is a large, independently verifiable international research organization — it operates the Large Hadron Collider and is where the World Wide Web was invented. Holding two separate OUI assignments under the same registrant name and address is itself a substance signal, distinguishing this entry from a bare single-OUI shell registration.

No public source ties either prefix to a specific commercial product line or a documented in-the-wild device sighting — no datasheet, no forum thread citing 80:D3:36 or 08:00:30. This is consistent with CERN using these blocks for its own internally-built or campus-deployed equipment (accelerator-controls electronics, DAQ hardware, internal network gear) rather than hardware manufactured and sold to third parties.

IEEE's public OUI registry publishes no assignment or registration date for either prefix. Third-party mirror maclookup.app lists scrape-derived "Initial registration" dates (13 October 2018 for 80:D3:36; 22 April 1998 for 08:00:30) — these are database artifacts from the mirror's own indexing process, not IEEE facts, and must not be presented as IEEE registration dates.

IEEE assignment

2 prefixes → CERN, registered CH-1211 Geneva, Switzerland [Confirmed] — IEEE MA-L (lines 33516, 38258); cross-checked maclookup.app

Registry / block size

MA-L (24-bit OUI) x2; no MA-M or MA-S entries found for CERN [Confirmed] — project registries (the IEEE MA-L registry / the IEEE MA-M registry / the IEEE MA-S registry)

HQ / country

CH-1211 Geneva, Switzerland (registry address) [Confirmed] — IEEE MA-L

Company status

active [Confirmed] — home.cern

Device types

no product/device corroboration found; likely internal/institutional use [Unknown] — targeted search found no datasheet or forum sighting for either prefix

Notable context

operator of the Large Hadron Collider; birthplace of the World Wide Web [Confirmed] — home.cern

Verified prefixes

80:D3:36, 08:00:30 (both MA-L, CERN) [Confirmed] — the IEEE MA-L registry, maclookup.app

Registration dates

not published by IEEE; maclookup.app shows scrape-derived dates (2018-10-13 for 80:D3:36; 1998-04-22 for 08:00:30) that are database artifacts, not IEEE facts [Confirmed caveat; actual IEEE date Unknown] — maclookup.app

Security context

CERN runs a substantial Computer Security Team (SOC analyzing ~3B connections/day, CSIRT sending ~300 alerts/month, Zeek IDS, internal MISP); no CVE/malware/botnet association found for either specific OUI [Likely] — home.cern/computer-security-numbers, security.web.cern.ch

Related vendors

none identified

Analyst note

two OUI assignments plus verifiable institutional substance (LHC operator, WWW origin) mean this is not a bare shell registration, but no specific device type has been confirmed for either prefix — treat matches as CERN-affiliated hardware, most likely internal or campus equipment rather than a named commercial product.