Aeromaritime Systembau GmbH — 1 prefix (MA-L)

A MAC address beginning 00:18:55 belongs to Aeromaritime Systembau GmbH, a German naval and defense communications manufacturer, and it typically turns up on shipboard or submarine switching and gateway hardware rather than on consumer or general enterprise equipment.

Aeromaritime Systembau GmbH is a real, active company headquartered at Ludwig-Erhard-Str. 16 in Neufahrn, Germany — an address that matches the IEEE registry entry exactly. Company sources describe it as founded in Munich in 1971, with roughly 76 employees today, and part of the AEROMARITIME GROUP alongside AEROMARITIME Security Systems GmbH and its Middle East subsidiary. A separate commercial-register record for the current legal entity shows a 2001-12-12 registration event, which reflects the GmbH's registration, not the company's founding.

The company's own site and an independent naval-industry contractor profile describe its product line: customized military and naval communication switching platforms, voice and data gateways bridging multivendor radios, modems, cryptos, and ciphers, antenna matrix switches, submarine RF communication-path switches, and the AT-4125 multifunction submarine antenna, with data-link gateway support for Link-11, Link-22, Link-14, Link-Y, and STANAG 5066. This gives a concrete device-type story for why the company holds its own IEEE OUI.

00:18:55 is a single, dedicated MA-L block — no other Aeromaritime entries were found in the MA-M or MA-S registries, and it is not a sub-block of a shared IEEE-administered base. IEEE does not publish an assignment date for this or any OUI, and no third-party lookup source carries a registration date for it either.

No CVE is recorded in the NVD and no CISA or vendor security advisory was found for Aeromaritime Systembau GmbH or its named products, as of an August 2026 search.

Device class

naval/military communication switching and gateway hardware

Registry class

MA-L, single dedicated OUI (not a shared IEEE base)

Also seen on

submarine antenna and RF path-switching equipment (aeromaritime.eu)

IEEE assignment

00:18:55 → Aeromaritime Systembau GmbH, registered Neufahrn, DE [Confirmed] — the IEEE MA-L registry 001855

Registry / block size

MA-L (24-bit OUI); single dedicated block, no MA-M or MA-S sub-allocations found under this company name [Confirmed] — the IEEE MA-L registry, the IEEE MA-S registry, the IEEE MA-M registry

HQ / country

Ludwig-Erhard-Str. 16, D-85375 Neufahrn, Germany [Confirmed] — the IEEE MA-L registry 001855; https://www.northdata.com/Aeromaritime%20Systembau%20GmbH,%20Neufahrn/Amtsgericht%20M%C3%BCnchen%20HRB%2043099

Company status

active; part of the AEROMARITIME GROUP alongside AEROMARITIME Security Systems GmbH (ASEC) and its Middle East subsidiary (SSME) [Likely] — https://aeromaritimegroup.com/, https://www.northdata.com/Aeromaritime%20Systembau%20GmbH,%20Neufahrn/Amtsgericht%20M%C3%BCnchen%20HRB%2043099

Founding vs. registry event

company sources state founded in Munich in 1971; the current GmbH's commercial register (HRB 43099) separately shows a 2001-12-12 registration event, which should not be read as the founding date [Likely] — https://www.bayern-international.de/en/company-database/company-details/aeromaritime-systembau-gmbh-103, https://www.naval-technology.com/contractors/maritime-c4/aeromaritime/, https://www.northdata.com/Aeromaritime%20Systembau%20GmbH,%20Neufahrn/Amtsgericht%20M%C3%BCnchen%20HRB%2043099

Device types

naval/military communication switching platforms, multivendor voice/data gateways, antenna matrix switches, submarine RF communication-path switches, AT-4125 submarine antenna [Confirmed] — https://aeromaritime.eu/, https://www.naval-technology.com/contractors/maritime-c4/aeromaritime/

Notable products

AT-4125 submarine antenna; STANAG 5066 / Link-11 / Link-22 / Link-14 / Link-Y gateway support [Confirmed] — https://aeromaritime.eu/

Assignment date

not published by IEEE for this or any OUI; no third-party lookup source carries a registration date for 00:18:55 either [Confirmed] — https://hwaddress.com/mac-address-range/00-18-55-00-00-00/00-18-55-FF-FF-FF/, https://maclookup.app/macaddress/001855/mac-address-details

Security history

no CVE recorded in the NVD and no CISA or vendor advisory found for the company or its named products, as of an August 2026 search [Confirmed] — https://nvd.nist.gov/vuln/search

Related vendors

AEROMARITIME Security Systems GmbH (ASEC); AEROMARITIME Security Systems Middle East (SSME) — group subsidiaries [Likely] — https://aeromaritimegroup.com/

Analyst note

a device presenting 00:18:55 is consistent with Aeromaritime's shipboard or submarine switching and gateway hardware rather than consumer or general enterprise equipment; the block is dedicated to this company, not shared. [Confirmed] — the IEEE MA-L registry 001855, https://aeromaritime.eu/