MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix28:56:C1:00:00:00 /24
Vendor address15th Fl, 400 Atlantic Street Stamford CT US 06901
Country🇺🇸 United States
RegisteredJul 13, 2017
Block range28:56:C1:00:00:00– 28:56:C1:FF:FF:FF
Address capacity16,777,216
AdministrationUniversally administered: its prefix comes from a block registered through the IEEE Registration Authority
TransmissionUnicast: addressed to a single device
SourceIEEE Registration Authority
Address capacity is the size of this registered block, not a count of devices actually manufactured or online. Registration identifies the organization holding the block, not a specific device model or unit.
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Ownership timeline
- Jul 13, 2017 – Jan 23, 2020 Harman International name changed
- Jan 23, 2020 – present Harman/Becker Automotive Systems GmbH
Example addresses in this block
Where this block sits
Harman/Becker Automotive Systems GmbH holds 11 registered blocks in the IEEE registry, ranking #279 of 33,427 organizations by block count.
Other blocks registered to Harman/Becker Automotive Systems GmbH