EMH Metering GmbH & Co. KG — 2 prefixes (MA-L)

A MAC address starting with 00:15:3B or 58:1F:19 belongs to EMH Metering GmbH & Co. KG, a German manufacturer of electricity and utility meters, typically seen on smart meters, industrial meters, and smart meter gateway hardware. Both blocks are registered under the identical IEEE organization string, confirming they belong to the same legal entity rather than a shared or ambiguous pool.

EMH Metering was founded in 1991 in Gallin, near Hamburg, by electrical engineer Peter Scheew, who had developed one of the world's first electronic meters two years earlier. The company now reports roughly 322 employees, an installed base of over 8 million devices, and customers in 50-plus countries, manufacturing more than a million meters in 2025 alone.

Its product line spans domestic and industrial meters, special high-precision meters, e-mobility charging and metering equipment, and the CASA smart meter gateway, which EMH states holds BSI Common Criteria certification for use as the communication hub of a German smart metering system. EMH also runs a Product Security Incident Response Team and has published one advisory, EMH-2021-001, covering a shared embedded TCP/IP-stack vulnerability set (the "AMNESIA:33" research) in its VAXCET/Variomod XC Ethernet product, not a flaw specific to EMH's own design.

A third, differently-named registrant, EMH Energiemesstechnik GmbH (00:1F:58), appears in the same registry and shares the "EMH" name and a nearby German address, but its distinct organization string keeps it out of this vendor's prefix set; it is flagged only as a probable, unconfirmed related entity.

IEEE assignments

00:15:3B and 58:1F:19 → "EMH Metering GmbH & Co. KG" [Confirmed] — the IEEE MA-L registry 00153B; the IEEE MA-L registry 581F19

Registry / block size

MA-L (24-bit OUI), two blocks under the same org string [Confirmed] — the IEEE MA-L registry 00153B; the IEEE MA-L registry 581F19

HQ / country

Neu-Galliner Weg 1, Gallin, Mecklenburg-Vorpommern, DE 19258 [Confirmed] — the IEEE MA-L registry 581F19

Company status

active [Confirmed] — https://emh-metering.com/en/company/

Company history

founded 1991 by Peter Scheew; ~322 employees; 8M+ installed devices; 50+ countries; 1M+ devices manufactured in 2025 [Confirmed] — https://emh-metering.com/en/company/

Device types

domestic/industrial/special meters, smart meter gateways (CASA), e-mobility charging/metering solutions, metering communication systems [Confirmed] — https://emh-metering.com/en/company/, https://emh-metering.com/en/products/smart-meter-gateway/casa/

Notable products

CASA smart meter gateway, vendor-claimed BSI Common Criteria certification BSI-CC-PP-0073 [Confirmed, vendor-stated] — https://emh-metering.com/en/products/smart-meter-gateway/casa/

Security advisory

EMH-2021-001, VAXCET/Variomod XC Ethernet, seven CVEs (CVE-2020-13987, -13988, -17437, -17438, -17439, -17440, -24334) from the cross-vendor "AMNESIA:33" embedded TCP/IP-stack research, not an EMH-specific design flaw; no CVE record specific to EMH's own product design found as of an August 2026 search [Confirmed] — https://emh-metering.com/en/security-advisory/; https://emh-metering.com/wp-content/uploads/2021/02/EMH_Advisory_VAXCET_210203.pdf

MA-M / MA-S blocks

none found for any EMH org string [Confirmed] — the IEEE MA-M registry; the IEEE MA-S registry

Excluded related registrant

EMH Energiemesstechnik GmbH, 00:1F:58, Brackel, DE 21438 — distinct org string, flagged as probable but unconfirmed related entity, not part of this vendor's prefix set [Likely] — the IEEE MA-L registry 001F58; https://emh-metering.com/en/company/

IEEE registration date

not published; IEEE's public OUI data carries no assignment/registration date field [Confirmed] — the IEEE MA-L registry