Raspberry Pi — 1 (Foundation) + ~10 (Trading Ltd) prefixes (MA-L + MA-M/MA-S/CID)

Raspberry Pi's OUIs split across two registrants, both UK-based and both mapping to the same product family. The classic original prefix B8:27:EB belongs to "Raspberry Pi Foundation" (MA-L) — the charitable entity — while modern boards draw from "Raspberry Pi Trading Ltd" / "Raspberry Pi (Trading) Ltd" (~10 blocks), the commercial arm that became Raspberry Pi Ltd and listed on the London Stock Exchange in June 2024 (Raspberry Pi Holdings plc, ticker RPI). Across the Trading entity the registrations span MA-L, MA-M, MA-S, and a CID assignment. Addresses are in Cambridge/Cambridgeshire (the Foundation block lists Caldecote; Trading Ltd lists the Maurice Wilkes Building / St Johns Innovation Park). These OUIs appear only on Raspberry Pi single-board computers — every model from Pi 1 through Pi 5, Zero, Compute Module, and the Pico (note Pico W's networking). This makes a Raspberry Pi OUI one of the most actionable signals for asset and rogue-device identification: a Pi on a corporate network is frequently unmanaged — a project server, media center, or network tool — and warrants verification against sanctioned inventory. Both registrant strings should be normalized to "Raspberry Pi."

IEEE assignment

B8:27:EB → Raspberry Pi Foundation (1 block); ~10 blocks → Raspberry Pi Trading Ltd / Raspberry Pi (Trading) Ltd [Confirmed] — IEEE MA-L + MA-M/MA-S/CID

Registry / block size

Foundation 1 MA-L block (B8:27:EB); Trading Ltd ~10 blocks across MA-L/MA-M/MA-S/CID [Confirmed assignments] — maclookup.app (IEEE-derived; count is a current third-party snapshot and drifts). NOTE: IEEE's public OUI data publishes NO assignment/registration date (the IEEE MA-L registry columns are only Registry, Assignment, Organization Name, Organization Address); any "date registered" from third-party tools is a database artifact, not an IEEE fact.

HQ / country

Foundation block lists Mitchell Wood House, Caldecote, Cambridgeshire CB23 7NU; Trading Ltd lists Maurice Wilkes Building, Cowley Road / St Johns Innovation Park, Cambridge CB4 0DS, GB [Confirmed] — IEEE MA-L

Company status

active; commercial arm Raspberry Pi (Trading) Ltd became Raspberry Pi Ltd and listed on the LSE Main Market in June 2024 as Raspberry Pi Holdings plc (ticker RPI; IPO priced 280p); the charitable Raspberry Pi Foundation remains the original entity [Confirmed] — LSE/RNS, Linklaters deal note

Device types

single-board computers (all models) [Confirmed] — maclookup.app

Notable products

Raspberry Pi 1–5, Zero, Compute Module, Pico (note Pico W networking)

Special note

Strong, specific device-class signal — a Raspberry Pi OUI almost certainly means a Pi SBC. Classic B8:27:EB = Raspberry Pi Foundation; modern boards use Raspberry Pi Trading Ltd blocks — DC:A6:32, D8:3A:DD, E4:5F:01, 2C:CF:67, 88:A2:9E. Normalize both registrant strings. Note: B8:27:EB shows a "US" country on maclookup.app despite a UK address — a known third-party rendering quirk, not an IEEE assertion of US domicile.

[Confirmed] — maclookup.app

Related vendors

Raspberry Pi Foundation (charity / original registrant) and Raspberry Pi Ltd / Raspberry Pi (Trading) Ltd (commercial entity) — same product family

Analyst note

A Raspberry Pi OUI is one of the most actionable signals for asset/rogue-device identification — a Pi on a corporate network is frequently unmanaged (project server, media center, or network tool) and warrants verification against sanctioned inventory.