M/A-COM INC. COMPANIES — 2 prefixes (MA-L)

IEEE has two MA-L blocks registered to "M/A-COM INC. COMPANIES" — 00-70-B0 and 02-70-B0 — both carrying the registry address 11717 Exploration Lane, Germantown, MD 20767, US. The name is a legacy corporate form for M/A-COM, Inc., the entity descended from Microwave Associates (founded 1950, renamed M/A-COM in 1978) that today trades as MACOM Technology Solutions Holdings, Inc. (NASDAQ: MTSI). MACOM's modern catalog is RF, microwave, millimeter-wave, and optical semiconductor components, not finished networked hardware, so these OUIs are not a consumer product line: what specific devices ever shipped under 00:70:B0 or 02:70:B0 cannot be confirmed from public sources. The 02-70-B0 block is the notable one for analysts — its first octet (0x02) has the locally-administered (U/L) bit set, so addresses under it sit in locally-administered space. IEEE issued the block to M/A-COM regardless, so the registration is genuine, but a 02:70:B0 sighting on a live network warrants the same scrutiny as any locally-administered MAC (VM/hypervisor, MAC randomization, or a spoofed address) rather than an automatic "MACOM hardware" conclusion. A 00:70:B0 (universally administered) sighting most plausibly indicates legacy lab, industrial, or embedded gear, not a widely deployed product.

IEEE assignment

2 prefixes → M/A-COM INC. COMPANIES, registered Germantown, MD, US [Confirmed] — IEEE MA-L (enrichment/registries/oui.csv lines 6334, 6532; https://standards-oui.ieee.org/oui/oui.csv)

Registry / block size

both MA-L (24-bit OUI, ~16M addresses each) [Confirmed] — IEEE MA-L; https://maclookup.app/macaddress/0070B0

Verified prefixes (both MA-L, M/A-COM INC. COMPANIES)

00:70:B0, 02:70:B0 [Confirmed] — IEEE oui.csv lines 6334, 6532

HQ / country

11717 Exploration Lane, Germantown, MD 20767, US (registry address) [Confirmed] — IEEE MA-L (oui.csv); country US

No MA-M / MA-S blocks

no M/A-COM match in mam.csv or oui36.csv [Confirmed] — enrichment/registries/mam.csv, enrichment/registries/oui36.csv

IEEE registration date

none published — IEEE's public OUI data (oui.csv columns are only Registry, Assignment, Organization Name, Organization Address) carries NO assignment/registration date; any "date registered" on third-party tools (e.g. maclookup.app shows "November 9, 2000") is a database artifact, not an IEEE fact [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

IANA reference

none — a standard MA-L vendor block has no IANA Ethernet Numbers RFC reference [Confirmed]

Company status

active as MACOM Technology Solutions Holdings, Inc. (NASDAQ: MTSI); legacy registrant name predates the 2016 rename to MACOM [Confirmed] — https://en.wikipedia.org/wiki/MACOM_Technology_Solutions; https://www.macom.com

Company history

Microwave Associates (1950) → M/A-COM, Inc. (1978); Telecommunications division sold to Hughes Aircraft in 1987; semiconductor entity acquired by Cobham from Tyco Electronics in 2009, later spun out as today's MACOM [Confirmed] — https://en.wikipedia.org/wiki/MACOM_Technology_Solutions; https://en.wikipedia.org/wiki/Hughes_Network_Systems

Device types under these OUIs

Unknown — no public product-to-OUI corroboration; the Germantown address maps to the semiconductor components entity, not a consumer networking line [Unknown] — https://www.macom.com/products/networking

Notable products (company, not OUI-specific)

RF/microwave/optical semiconductor components (GaAs, GaN, InP, SiGe, silicon photonics; amplifiers, switches, MACsec PHY, carrier Ethernet ICs); briefly held APM86-series wireless SoCs via the AppliedMicro acquisition (Jan 2017), processor division divested to Carlyle Group (Oct 2017) [Confirmed] — https://www.macom.com/products/networking/network-connectivity-solutions/ethernet-macsec-phy; https://ir.macom.com/news-releases/news-release-details/macom-successfully-completes-acquisition-appliedmicro/

Locally-administered note

02-70-B0's first octet (0x02) has the U/L bit set, so its addresses are locally administered; IEEE issued the block anyway, so the registration is real, but 02:70:B0 in the wild should be triaged like any locally-administered MAC [Confirmed] — https://maclookup.app/macaddress/0270B0; https://en.wikipedia.org/wiki/MAC_address

Security context

no CVEs, active exploits, or threat-actor associations tied to these OUIs in public sources; 02:70:B0 sits in locally-administered space (could be a VM, randomized client, or spoof); MACOM MACsec PHY chips underlie encrypted carrier/data-center links but a chip vendor's OUI would not normally appear as a host MAC in ARP/CAM tables [Likely] — https://en.wikipedia.org/wiki/MAC_address; https://www.macom.com/products/networking/network-connectivity-solutions/ethernet-macsec-phy

Analyst note

legacy corporate-form registrant for what is now MACOM; 00:70:B0 (universally administered) is rare in consumer/enterprise gear — most likely lab, industrial, or embedded if seen at all; 02:70:B0 is locally administered — treat any sighting with caution. The Telecommunications arm that most plausibly shipped end-user network gear was sold to Hughes Aircraft in 1987, so any surviving M/A-COM-branded network hardware in the field would be very old [Likely] — https://en.wikipedia.org/wiki/Hughes_Network_Systems