Adaptrum Inc. — F0:F5:AE (MA-L)

The MA-L block F0:F5:AE is registered to Adaptrum Inc., a wireless broadband equipment maker headquartered at 25 E Trimble Rd., San Jose, California 95131, US. Adaptrum builds TV White Space (TVWS) radios — outdoor fixed-wireless base stations and client radios that operate in unused UHF television spectrum (sub-GHz) to deliver long-range, non-line-of-sight broadband for rural ISPs and wide-area IoT. Its second-generation ACRS 2.0 line (e.g. the ACRS2-B1000 and ACRS2-B2000 base stations) forms point-to-multipoint links and is managed through a cloud platform, the Planet Adaptrum NMS. Because this is carrier/infrastructure-class gear rather than consumer Wi-Fi, MAC addresses drawn from this OUI typically surface in captures from rural or remote broadband deployments — for example Microsoft Airband and NGO connectivity projects — not in ordinary enterprise or home networks. The single MA-L block (~16 million addresses) is more than enough for a niche-volume equipment vendor of this kind. No public CVEs or security advisories were found for Adaptrum or its ACRS products at the time of research; the chief structural dependency to note is that TVWS devices rely on FCC-certified spectrum databases (e.g. Google, Iconectiv) for channel selection, a cloud touchpoint inherent to the technology rather than a documented flaw.

IEEE assignment

F0:F5:AE → Adaptrum Inc. (MA-L block) [Confirmed] — the IEEE MA-L registry (single match; not present in the IEEE MA-M registry or the IEEE MA-S registry)

Registry / block size

MA-L (24-bit OUI; ~16M addresses) [Confirmed] — IEEE the IEEE MA-L registry / maclookup.app

HQ / country

25 E Trimble Rd., San Jose, California 95131, US [Confirmed] — IEEE the IEEE MA-L registry address field, corroborated by maclookup.app

Company status

active [Confirmed] — adaptrum.com (site reachable historically; SSL certificate had expired at time of research) / PR Newswire releases

Founded

2005, by Haiyun Tang, in San Jose, CA [Confirmed] — owler.com; founding context corroborated by PR Newswire

Industry

wireless broadband / fixed wireless access (FWA) infrastructure; TV White Space (TVWS) spectrum technology; rural broadband and IoT connectivity [Confirmed] — PR Newswire, adaptrum.com

Device types

TVWS outdoor base stations and client radios (CPE) for point-to-multipoint fixed wireless; primary line is ACRS 2.0 (ACRS2-B1000, ACRS2-B2000); cloud-managed via "Planet Adaptrum NMS" [Confirmed] — wdi.rfwel.com (ACRS2-B1000 listing), PR Newswire (ACRS 2.0 launch)

Notable products

ACRS 2.0 TVWS base stations and client radios; Planet Adaptrum NMS (cloud network management) [Confirmed] — PR Newswire

Deployment context

rural ISP / NGO / Microsoft Airband fixed-wireless infrastructure, deployed in 15+ countries; not consumer or typical enterprise edge hardware [Likely] — PR Newswire (single-vendor PR sourcing on country/partner count)

Registration date

Unknown — IEEE publishes NO assignment/registration date in any of its OUI registry CSVs (the IEEE MA-L registry columns are only Registry, Assignment, Organization Name, Organization Address). Third-party tools list 12 Jul 2013 (initial) and 17 Nov 2015 (updated), but these are maclookup.app database artifacts, not IEEE facts, and are deliberately not recorded as a registration date.

[Unknown] — IEEE the IEEE MA-L registry, maclookup.app

Known vulnerabilities

Unknown — no CVEs, NVD entries, or public security advisories found for Adaptrum or ACRS products [Unknown] — no source

Analyst note

An F0:F5:AE address on a globally-administered MAC identifies genuine Adaptrum TVWS infrastructure gear; its operating context is rural/remote fixed-wireless, so encountering it in a typical home or office capture is unusual. TVWS channel selection depends on external FCC-certified spectrum databases — an inherent cloud dependency, not a known exploit.

[Likely] — PR Newswire