macadress

ASM Pacific Technology

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:03:66:00:00:00 /24
Vendor address12/F Watson Centre Kwai Chung HK
Country🇭🇰  Hong Kong
RegisteredSep 8, 2000
Block range00:03:66:00:00:00– 00:03:66: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 →

Example addresses in this block

00:03:66:00:00:00 00:03:66:7F:FF:FF 00:03:66:FF:FF:FF

Where this block sits

Previous 00:03:65:00:00:00 /24 Kira Information & Communications, Ltd. Next 00:03:67:00:00:00 /24 Jasmine Networks, Inc.

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

ASM Pacific Technology holds 1 registered blocks in the IEEE registry, ranking #5,623 of 33,421 organizations by block count.