Carl Zeiss — 2 prefixes (MA-L)

A MAC address starting with 00:20:0D or F0:95:F1 belongs to Carl Zeiss, the German optics and precision-engineering group headquartered in Oberkochen, Baden-Württemberg. Both prefixes are IEEE MA-L (24-bit OUI) blocks registered under closely related organization names — "CARL ZEISS" (00:20:0D) and "Carl Zeiss AG" (F0:95:F1).

The two registry rows differ in address detail: 00:20:0D carries only a bare postal-box address with no city given, while F0:95:F1 carries the full Oberkochen street address. Both short-name to "CarlZeiss" in this repo's local manuf-name cache, independently corroborating that they trace to the same corporate registrant rather than an unrelated company that merely shares the name.

Carl Zeiss AG is not a marginal or shell registrant. Founded in 1846 in Jena and now headquartered in Oberkochen, the ZEISS Group is a large, active company owned by the Carl-Zeiss-Stiftung foundation, reporting roughly 46,600 employees and about €11.9 billion in revenue (fiscal 2025).

ZEISS operates across four business segments: Industrial Quality & Research (microscopy, industrial metrology/CMMs), Medical Technology (ophthalmology, neurosurgery, dentistry), Consumer Markets (camera lenses, binoculars, sports optics), and Semiconductor Manufacturing Technology (lithography systems). Two separate IEEE MA-L assignments plus this scale of ongoing operations place this entry well past a bare single-OUI registration — this is company substance, not a name-only match.

A disambiguation matters here: several OTHER, unrelated IEEE registrants sit on a street named after Carl Zeiss (a common commemorative street name in German industrial towns) — VIDEOR E. Hartig GmbH (60:27:1C, Rödermark), Sypro Optics GmbH (1C:0F:CF, Jena), MAS Elektronik AG (00:CD:90, Buxtehude), KWS Computersysteme GmbH (00:12:91, Ettlingen), Deutschmann Automation GmbH & Co. KG (00:14:11, Bad Camberg), and joint analytical systems GmbH (MA-S sub-block 8C:1F:64:31B, Moers).

None of these six is Carl Zeiss, none is a named Carl Zeiss subsidiary in any source checked, and their prefixes are excluded from this entry.

Device-type corroboration is Likely rather than Confirmed: no source found gives an exact MAC-to-model mapping for either prefix. ZEISS markets network-connected equipment consistent with a large industrial/medical-device manufacturer — ophthalmic surgical microscopes with digital integration (e.g., the ARTEVO line) and coordinate measuring machines (CMMs) supporting networked shop-floor integration via MTConnect.

None of the sources checked ties a specific product model to 00:20:0D or F0:95:F1 by MAC address, so device type stays a category-level inference rather than a confirmed identification.

IEEE assignment

2 prefixes → "CARL ZEISS" / "Carl Zeiss AG", both DE [Confirmed] — the IEEE MA-L registry 00200D, the IEEE MA-L registry F095F1

Registry / block size

MA-L (24-bit OUI) x2; no MA-M (the IEEE MA-M registry) or MA-S (the IEEE MA-S registry) assignment found under a "Carl Zeiss" registrant name [Confirmed absence, checked all three] — the IEEE MA-L registry, the IEEE MA-M registry, the IEEE MA-S registry

Registered address

00:20:0D — "POSTFACH 1380", DE (no street/city given in the registry row); F0:95:F1 — Carl-Zeiss-Straße 22, Oberkochen, DE 73447 [Confirmed] — the IEEE MA-L registry 00200D, the IEEE MA-L registry F095F1

Cross-registrant corroboration

local manuf-name cache short-names both 00:20:0D and F0:95:F1 as "CarlZeiss" ("Carl Zeiss" / "Carl Zeiss AG" respectively), independently agreeing the two IEEE rows trace to the same corporate entity despite the differing address detail

[Confirmed] — the Wireshark manufacturer database (rows for 00:20:0D and F0:95:F1)

Company status

active — large, currently operating German optics/precision-engineering group, ~46,600 employees, ~€11.9B revenue (FY2025), owned by the Carl-Zeiss-Stiftung foundation [Confirmed] — en.wikipedia.org/wiki/Zeiss_(company), zeiss.com

Company history

founded 1846 in Jena by optician Carl Zeiss; HQ moved to/consolidated in Oberkochen post-WWII; today organized in four segments (Industrial Quality & Research, Medical Technology, Consumer Markets, Semiconductor Manufacturing Technology) [Confirmed] — en.wikipedia.org/wiki/Zeiss_(company)

Device / product context

microscopy and industrial metrology (coordinate measuring machines, network-integrable via MTConnect), ophthalmology/surgical microscopes with networked digital integration (e.g., ARTEVO line into the "ZEISS Medical Ecosystem"), semiconductor lithography systems, consumer optics — but no source found maps a specific device model to either OUI by MAC address [Likely] — zeiss.com/metrology/us/systems/cmms.html, support.machinemetrics.com (MTConnect/Zeiss CMM connectivity), zeiss.com/meditec (ARTEVO ophthalmic microscope networked integration)

Company-substance disambiguation

several OTHER, unrelated MA-L/MA-S registrants share a postal address on a street named "Carl-Zeiss-Straße"/"Carl Zeiss Str." (a common commemorative street name in German industrial towns) but are NOT Carl Zeiss and are excluded from this entry: VIDEOR E. Hartig GmbH, Sypro Optics GmbH, MAS Elektronik AG, KWS Computersysteme GmbH, Deutschmann Automation GmbH & Co. KG, and joint analytical systems GmbH [Confirmed distinct registrants] — the IEEE MA-L registry 60271C, the IEEE MA-L registry 1C0FCF, the IEEE MA-L registry 00CD90, the IEEE MA-L registry 001291, the IEEE MA-L registry 001411, the IEEE MA-S registry 8C1F6431B

Registration date

Unknown — IEEE publishes NO OUI assignment/registration date (the IEEE MA-L registry columns are only Registry, Assignment, Organization Name, Organization Address); a third-party tool (maclookup.app) shows a "registered on 25 June 2018" value for F0:95:F1 only (it does not carry 00:20:0D under the "Carl Zeiss AG" listing at all) — that date is a database-ingestion artifact of the tool, not an IEEE fact, and is not recorded here

[Confirmed] — maclookup.app/vendors/carl-zeiss-ag, standards-oui.ieee.org/oui/oui.csv column set

IANA reference

not applicable — no IANA RFC reference exists for an IEEE OUI entry; left blank, not invented [Confirmed]

Security / abuse context

no CVE naming "Zeiss" is recorded in the NVD as of an August 2026 search (NVD API keywordSearch=Zeiss returned totalResults: 0); no CISA ICS/ICSMA advisory naming Zeiss was found in an August 2026 search of CISA's advisory listings. ZEISS Medical Technology publishes a general cybersecurity governance page (secure-by-design lifecycle claims, third-party pen testing, patch management) but names no specific past vulnerability and routes vulnerability disclosures through a login-gated "MyZEISS" portal not accessible here [Confirmed absence for NVD/CISA as of this search; Confirmed for the governance-page content] — services.nvd.nist.gov/rest/json/cves/2.0?keywordSearch=Zeiss, cisa.gov/news-events/ics-advisories, zeiss.com/meditec/en/service/cybersecurity-at-zeiss-medical-technology.html

Analyst note

a MAC beginning with 00:20:0D or F0:95:F1 identifies Carl Zeiss / ZEISS Group corporate equipment; treat device type as Likely industrial or medical hardware from a large diversified manufacturer rather than a confirmed specific model, since no source ties either prefix to a named product by MAC. Do not extend this identification to the several unrelated registrants whose postal address merely sits on a Carl-Zeiss-named street.