Lumacron Technology Ltd. — 2 IEEE blocks (MA-L + MA-S)

Lumacron Technology Ltd. is a UK maker of specialist optical-network instrumentation, registered in IEEE's MAC registries under two assignments to a single legal entity at 4 Pitreavie Court, Pitreavie Business Park, Dunfermline, Fife, GB KY11 8UU. The first is an MA-L block, OUI 2C:C6:A0, which grants the full 24-bit prefix and ~16 million addresses; the second is an MA-S (OUI-36) block, 70:B3:D5:77:8, a smaller 4,096-address slice carved from the shared IEEE 70:B3:D5 administrator prefix. Because the 70:B3:D5 OUI is an IEEE-administered pool fanned out to hundreds of MA-S holders, a 70:B3:D5 address resolves to Lumacron only across the 8x sub-range; the 2C:C6:A0 block is exclusively Lumacron's. The hardware behind these prefixes is carrier- and enterprise-grade optical test and access equipment — DWDM wavelength-access ROADMs (e.g. Helios 4000), OTN/SONET/SDH monitoring appliances, and traffic recorders/players for fibre-optic transport networks — not consumer or general-purpose routing gear. Lumacron was acquired by ARKA Group (a Blackstone-backed US defence/intelligence technology firm) on 17 March 2023, and the product line now runs under ARKA's Optical Network Instrumentation division. The practical read for asset classification: either prefix on a network that is not operating optical-transport infrastructure is unexpected and worth investigating, since the product class is built to tap and record live fibre traffic. No CVEs or public vulnerability disclosures were found for Lumacron products, and IEEE publishes no registration date for either block.

IEEE assignment (MA-L)

2C:C6:A0 → Lumacron Technology Ltd., Dunfermline, Fife, GB [Confirmed] — IEEE MA-L (enrichment/registries/oui.csv line 254)

IEEE assignment (MA-S)

70:B3:D5:77:8 (OUI-36 base 70B3D5778) → Lumacron Technology Ltd., same address [Confirmed] — IEEE MA-S (enrichment/registries/oui36.csv line 743)

Registry / block size

holds 2 blocks — one MA-L (24-bit OUI, ~16.7M addresses) and one MA-S (OUI-36, 4,096 addresses carved from the shared IEEE 70:B3:D5 pool) [Confirmed] — IEEE MA-L / MA-S. NOTE: IEEE's public OUI data publishes NO assignment/registration date (oui.csv / oui36.csv columns are only Registry, Assignment, Organization Name, Organization Address); any "date registered" on third-party tools is a database artifact, not an IEEE fact.

MA-M registry

no Lumacron entry found in the MA-M (mam.csv) registry [Confirmed] — IEEE MA-M (enrichment/registries/mam.csv)

HQ / country

4 Pitreavie Court, Pitreavie Business Park, Dunfermline, Fife, GB KY11 8UU (registry address, identical across both blocks) [Confirmed] — IEEE MA-L / MA-S

Company status

acquired by ARKA Group on 17 March 2023; product line operates under ARKA's Optical Network Instrumentation division (ARKA is Blackstone-backed) [Confirmed] — mofo.com (deal announcement), arka.org

Founded

~2014 per Bloomberg / GlobalDatabase third-party company records (database artifact, not an IEEE fact) [Likely] — bloomberg.com, uk.globaldatabase.com

Device types

optical-network instrumentation — DWDM wavelength-access ROADMs (Helios 4000), OTN/SONET/SDH monitoring appliances, traffic recorders/players, WAN/LAN conversion hardware [Confirmed] — lumacron.com, arka.org

Notable products

Helios 4000 wavelength interceptors / wavelength-access ROADMs

IANA reference

none — no IANA RFC reference applies to these OUI entries [Confirmed] — (registry has no IANA Reference value for these rows)

Security note

no CVEs or public vulnerability disclosures found in NVD/CISA or general search as of June 2026; device class (optical intercept + traffic-recording appliances) is inherently sensitive — these tools tap and record live fibre traffic [Likely] — nvd.nist.gov (lumacron query, no results), arka.org

Analyst note

a 2C:C6:A0 address is exclusively Lumacron; a 70:B3:D5 address is Lumacron only within the 77:8x MA-S sub-range (the parent 70:B3:D5 OUI is an IEEE pool shared across many MA-S holders). Either prefix on a non-optical-transport network is unexpected and warrants scrutiny given the traffic-intercept nature of the hardware.