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.

Company

CERN (European Organization for Nuclear Research), Geneva, Switzerland — operator of the Large Hadron Collider and birthplace of the World Wide Web

Registered prefixes

80:D3:36 and 08:00:30 (both MA-L / 24-bit OUI)

Registered address

CH-1211 GENEVE SUISSE/SWITZ CH 023 (IEEE registry address)

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.