macadress

Harbour Cross Technology Ltd

MA-M
MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixC4:A1:0E:40:00:00 /28
Vendor addressUnit 622 One Island South, 2 Heung Yip Road, Wong Chuk Hang, Hong Kong China HK 000000
Country🇭🇰  Hong Kong
RegisteredMar 16, 2022
Block rangeC4:A1:0E:40:00:00– C4:A1:0E:4F:FF:FF
Address capacity1,048,576
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

C4:A1:0E:40:00:00 C4:A1:0E:47:FF:FF C4:A1:0E:4F:FF:FF

Where this block sits

Previous C4:A1:0E:30:00:00 /28 Consolinno Energy GmbH Next C4:A1:0E:50:00:00 /28 O-NET Industrial Technologies (Shenzhen) Limited

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

Harbour Cross Technology Ltd holds 1 registered blocks in the IEEE registry, ranking #14,553 of 33,421 organizations by block count.