macadress

POSDATA

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:15:7D:00:00:00 /24
Vendor address276-2,Seohyeon-dong,Bundang-gu, Seongnam-City Kyeonggi-Do KR 463-775
Country🇰🇷  South Korea
RegisteredAug 24, 2005
Block range00:15:7D:00:00:00– 00:15:7D: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.

Curious how a prefix like this turns into a full address? See how MAC addresses are structured →

Ownership timeline

  1. Aug 24, 2005 – Apr 27, 2016 POSDATA CO., LTD. name changedaddress changed
  2. Apr 27, 2016 – present POSDATA

Example addresses in this block

00:15:7D:00:00:00 00:15:7D:7F:FF:FF 00:15:7D:FF:FF:FF

Where this block sits

Previous 00:15:7C:00:00:00 /24 Dave Networks, Inc. Next 00:15:7E:00:00:00 /24 Weidmüller Interface GmbH & Co. KG

The nearest registered blocks of the same size on either side of this one in IEEE's address space.

POSDATA holds 1 registered blocks in the IEEE registry, ranking #23,269 of 33,427 organizations by block count.