Plantronics, Inc. — 10 prefixes (MA-L)

A MAC address beginning with one of ten IEEE-registered prefixes belongs to Plantronics, Inc., a Santa Cruz, California headset and audio-accessory manufacturer, and typically identifies a USB, Bluetooth, or DECT wireless headset used in an office or contact-center setting.

Plantronics is not a bare single-OUI registrant. IEEE's MA-L registry lists ten separate blocks assigned to "PLANTRONICS, INC." at the same 345 Encinal Street, Santa Cruz address — a multi-block footprint consistent with a high-volume manufacturer rather than a one-off shell registration. The local Wireshark the Wireshark manufacturer database cache cross-confirms the same ten assignments under the Plantronics name with no conflicts.

The company has a documented corporate lineage. Plantronics acquired Polycom in 2018/2019, the combined company rebranded as Poly in 2019, and HP Inc. completed an all-cash acquisition of Poly (Plantronics, Inc.) that closed August 29, 2022. A sibling entry, vendor-poly-polycom, already documents the Polycom side of this same consolidated corporate family.

Devices carrying a Plantronics OUI are predominantly end-user peripherals — USB-attached or Bluetooth/DECT-paired headsets and DECT wireless headset systems such as the Savi 700/400 and CS500 series — rather than independently networked infrastructure, though later Poly-branded conferencing endpoints (speakerphones, webcams) add direct Ethernet/IP connectivity.

Security exposure for this vendor sits mostly in companion management software rather than the MAC/OUI layer itself. CVE-2024-27460 is a patched local privilege-escalation flaw in Plantronics Hub (versions up to 3.25.1). On the wireless side, Plantronics' DECT headsets were the first in the headset market to earn DECT Forum security certification, and the vendor offers a device-management platform for fleet-wide firmware auditing.

IEEE assignment

10 MA-L prefixes → PLANTRONICS, INC., registered Santa Cruz, CA, US [Confirmed] — the IEEE MA-L registry

Registry / block size

MA-L (24-bit OUI) only; no MA-M or MA-S matches for Plantronics [Confirmed] — the IEEE MA-M registry, the IEEE MA-S registry

HQ / registered address

345 Encinal Street, Santa Cruz, CA 95060, US [Confirmed] — the IEEE MA-L registry

Verified prefixes

00:03:89, 00:19:7F, 00:23:7F, 0C:E0:E4, 38:5C:76, 48:C1:AC, 8C:9B:2D, BC:F2:92, E4:22:A5, F4:B6:88 [Confirmed] — the IEEE MA-L registry, cross-checked against the Wireshark manufacturer database

Assignment date

Unknown — IEEE's MA-L registry publishes no assignment/registration date for any of the 10 blocks; not attributable to IEEE [Confirmed absence]

Company status

active, now operating as part of HP Inc. following the 2019 Poly rebrand and HP's August 2022 acquisition [Confirmed] — https://www.sec.gov/Archives/edgar/data/47217/000004721722000054/hpq-20220731.htm, https://www.engadget.com/hp-buys-poly-plantronics-142337041.html

Corporate lineage

Plantronics → Polycom merger (2018/2019) → Poly rebrand → HP acquisition (closed 2022-08-29) [Confirmed] — https://en.wikipedia.org/wiki/Plantronics, https://www.computerworld.com/article/1619323/hp-to-acquire-poly-for-3-3b.html

Device types

corded/USB/Bluetooth headsets; DECT wireless headset systems (Savi 700/400, CS500 series); later Poly-branded conferencing hardware [Likely] — https://www.plantronics.com/in/en/features/dect-security, https://www.officesupply.com/technology/telephone-communication/phone-accessories/telephone-headsets-accessories/plantronics-savi-8200-series-wireless-dect-headset-system/p771812.html

Security note

CVE-2024-27460, local privilege-escalation flaw in Plantronics Hub ≤3.25.1, patched [Confirmed] — https://securityvulnerability.io/vulnerability/CVE-2024-27460, https://gbhackers.com/plantronics-hub-flaw-allows-attackers/

DECT security

Plantronics DECT headsets were first in market to earn DECT Forum security certification (authentication, 64-bit encryption, subscription verification, call setup/teardown protection) [Likely] — https://newsroom.plantronics.com/press-release/enterprise/plantronics-dect-wireless-headsets-first-market-meet-latest-security-standa

Related vendor entry

vendor-poly-polycom.md documents the Polycom/Poly side of the same consolidated corporate family; checker should confirm whether this should stay standalone or cross-reference [Confirmed] — /mac/vendor/poly-polycom/