Telecom Design — 2 prefixes (MA-L)

A MAC address starting with 00:07:3C or 00:22:7A belongs to Telecom Design, a French IoT and RF-module manufacturer headquartered in Gradignan, near Bordeaux. Both prefixes are IEEE MA-L (24-bit OUI) registrations under the same company name and address — two blocks under one small vendor is itself a substance signal, since most bare single-product shells hold only one.

Telecom Design describes itself as established in 2000 and is cited by the Sigfox partner network as the first vendor to develop and market Sigfox-certified RF modules, including the TD1204, TD1205, and TD1207/08R families built on Cortex-M3/EFM32 silicon with an onboard AES engine. These modules shipped into early Sigfox IoT deployments.

In 2022 the company took a majority investment from private-equity firm Andera Partners and opened a US office, expanding beyond its original Sigfox-module business. Its current stated product focus is smart-home security and elder-telecare devices, marketed under the names Vibby Home and Vibby Oak, with cited clients Verisure, Securitas Direct, and Michelin.

Neither the repo's cached IEEE registry mirror nor IEEE's public OUI data records an assignment date for either block, so none is claimed here. No independent device-fingerprint data ties a specific device type to one prefix versus the other, and a targeted web search found no CVE or public vulnerability advisory for the TD120x module line — absence of results is not proof of absence.

IEEE assignment

00:07:3C, 00:22:7A → Telecom Design, registered Gradignan, France [Confirmed] — the IEEE MA-L registry, the Wireshark manufacturer database (repo mirror)

Registry / block size

MA-L (24-bit OUI); 2 IEEE prefixes; not present in the IEEE MA-M registry (MA-M) or the IEEE MA-S registry (OUI-36) [Confirmed] — the IEEE MA-L registry, the IEEE MA-M registry, the IEEE MA-S registry

HQ / country

Za/Voie Romaine, Zone de Remora, 33170 Gradignan, France [Confirmed] — the IEEE MA-L registry, the Wireshark manufacturer database

Company status

Active; majority PE investment from Andera Partners in 2022; opened US office [Likely] — securitysystemsnews.com

Device types

Sigfox-certified RF/IoT modules (TD1204, TD1205, TD1207/08R, TD1208); smart-home-security and elder-telecare devices [Likely] — telecomdesign.com/about, disk91.com, partners.sigfox.com

Notable products

TD120x Sigfox RF module family; Vibby Home, Vibby Oak (smart-home/telecare) [Likely] — telecomdesign.com/about

Verified sample prefixes (both MA-L, Telecom Design)

00:07:3C, 00:22:7A [Confirmed] — the IEEE MA-L registry

Historic block

Company states it was established in 2000; cited by Sigfox's own partner network as the first vendor to develop/market Sigfox-certified RF modules [Likely] — telecomdesign.com/about, partners.sigfox.com

Special note

IEEE publishes no registration/assignment date for MAC prefixes; none is asserted for either block here. No CVE or public advisory found for the TD120x line in a targeted search — absence of results is not proof of absence. [Confirmed on no-date policy; Unknown on CVEs] — the IEEE MA-L registry; targeted web search (no results)

Related vendors

None found or confirmed [Unknown]

Analyst note

Two same-name/address OUI blocks plus an identifiable company with named product lines (TD120x Sigfox modules; Vibby Home/Oak) indicate real company substance rather than a bare shell registration; device-type mapping to individual prefixes is not independently corroborated.

[Likely] — synthesis of registry + web research