FAST PHOTONICS HK CO., LIMITED (A4:0B:78:00:00:00 /24)

FAST PHOTONICS HK CO., LIMITED MA-L

MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.

PrefixA4:0B:78:00:00:00 /24

Vendor addressFLAT/RM B3, 19/F, TUNG LEE COMMERCIAL BUILDING, 91-97 JERVOIS STREET, SHEUNG WAN HONG KONG CN HK

Block rangeA4:0B:78:00:00:00– A4:0B:78: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

A4:0B:78:00:00:00 A4:0B:78:7F:FF:FF A4:0B:78:FF:FF:FF