Landis+Gyr — 9 prefixes (3 MA-L + 6 MA-S)

Landis+Gyr is a Swiss-headquartered (Cham, Switzerland) smart-metering and grid-intelligence company — one of the largest makers of electricity, gas, and water meters and the AMI networking gear that backhauls their readings. Its IEEE footprint spans both registry tiers: three MA-L (24-bit) OUIs registered to three distinct legal entities — Landis+Gyr GmbH in Nürnberg (64:01:FB), Landis+Gyr in Alpharetta, Georgia (00:1C:64), and Landis+Gyr Ltd. in Zug (00:0F:93) — plus six MA-S (36-bit) blocks, all registered to the Brazilian subsidiary Landis+Gyr Equipamentos de Medição Ltda in Curitiba. There are no MA-M entries. The distinguishing fact for anyone classifying a Landis+Gyr MAC is that these are OT/ICS-class devices: smart meters (the E-series and Revelo electricity meters, G-series gas meters, ULTRAHEAT heat meters), Gridstream RF-mesh / G3-PLC communication modules, and N-series Network Gateways and Nodes. They appear on utility Advanced Metering Infrastructure and smart-grid networks, not on ordinary enterprise IT segments, so a Landis+Gyr OUI on a network usually signals metering or grid-edge infrastructure rather than a workstation or phone. As with every vendor, IEEE publishes no registration date for any of these prefixes; the "13 May 2007" and "03 April 2004" dates seen on third-party MAC-lookup sites are database artifacts, not IEEE facts, and must not be surfaced as registration dates.

IEEE assignment (MA-L)

64:01:FB → Landis+Gyr GmbH, Humboldtstrasse 64, Nürnberg, Bavaria, DE 90459 [Confirmed] — IEEE the IEEE MA-L registry (registries/oui.csv)

IEEE assignment (MA-L)

00:1C:64 → Landis+Gyr, 30000 Mill Creek Ave. Suite 100, Alpharetta, GA, US 30022 [Confirmed] — IEEE the IEEE MA-L registry

IEEE assignment (MA-L)

00:0F:93 → Landis+Gyr Ltd., Feldstrasse 1, Zug, CH CH-6301 [Confirmed] — IEEE the IEEE MA-L registry

IEEE assignment (MA-S /36, 6 blocks)

8C:1F:64:29:3/36, 8C:1F:64:5A:A/36, 8C:1F:64:CE:9/36, 8C:1F:64:54:2/36, 8C:1F:64:95:E/36, 70:B3:D5:0B:6/36 → Landis+Gyr Equipamentos de Medição Ltda (and "Landis Gyr"), Hasdrubal Bellegard 400, CIC, Curitiba, Paraná, BR 81460-120 [Confirmed] — IEEE the IEEE MA-S registry (registries/oui36.csv). NOTE: 70:B3:D5 and 8C:1F:64 are shared IEEE MA-S base ranges; only the assigned /36 sub-block belongs to Landis+Gyr, not the whole base OUI.

Registry / block size

MA-L (24-bit OUI) ×3 and MA-S (36-bit) ×6; no MA-M entries [Confirmed] — IEEE the IEEE MA-L registry + the IEEE MA-S registry. NOTE: IEEE public OUI data publishes NO assignment/registration date (columns are only Registry, Assignment, Organization Name, Organization Address); third-party "date registered" values (e.g. 13 May 2007, 03 April 2004) are database artifacts, not IEEE facts.

HQ / country of origin

Cham, Switzerland — Landis+Gyr Group AG, listed on SIX Swiss Exchange [Confirmed] — landisgyr.com, globaldata.com

Company status

active [Confirmed] — landisgyr.com

Device types

smart electricity meters (E350/E430/E450/E550-G2/E650/E750/E850/E860, Revelo); smart gas meters (G750, G480 ultrasonic, retrofit RF modules); ultrasonic water meters (W370); heat/cooling meters (ULTRAHEAT T230/T330/T550); AMI infrastructure — N2400/N2450 Network Gateway, N500/N550 Series 6 Network Nodes, Gridstream radios/routers; SPAN Edge; street-light controllers

[Confirmed] — landisgyr.com/devices

Network role

OT/ICS-class devices on utility AMI / smart-grid networks; MACs embedded in meters, RF-mesh (Gridstream) or G3-PLC communication modules, gateways and nodes — not typical enterprise IT gear [Confirmed] — landisgyr.com/solution/multi-commodity-ami

Security context

CISA ICS advisory ICSA-23-026-07 (2023-01-26) covers CVE-2022-3083 in the E850 (ZMQ200) grid meter — CWE-784, CVSS v3.1 base 3.9 (Low; AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L): a crafted session-cookie value can make the web management UI inaccessible (web-UI DoS). Local vector, no RCE; vendor issued a fix. No critical/known-exploited CVEs for Landis+Gyr products surfaced in the searched sources as of mid-2026

[Confirmed] — cisa.gov ICSA-23-026-07, nvd.nist.gov CVE-2022-3083

Notable products

E-series and Revelo electricity meters; Gridstream AMI platform (RF mesh + G3-PLC)

Related entities

Landis+Gyr GmbH (DE), Landis+Gyr Ltd. (CH), Landis+Gyr Equipamentos de Medição Ltda (BR) — same group, distinct IEEE registrants

Analyst note

A Landis+Gyr OUI on a network reliably flags utility metering / grid-edge infrastructure (OT/ICS), not enterprise endpoints; for the MA-S /36 blocks, match the full assigned sub-block, since the base OUI is shared across multiple IEEE registrants.