MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix04:C3:E6:B0:00:00 /28
Vendor addressW4/5 Capital Point, Wentloog Avenue Cardiff Cardiff GB CF3 2PW
Country🇬🇧 United Kingdom
RegisteredApr 22, 2018
Block range04:C3:E6:B0:00:00– 04:C3:E6:BF: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
Where this block sits
Previous
04:C3:E6:A0:00:00 /28
Sealed Unit Parts Co., Inc.
Next
04:C3:E6:C0:00:00 /28
SHANTOU YINGSHENG IMPORT & EXPORT TRADING CO.,LTD.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Flintec UK Ltd. holds 1 registered blocks in the IEEE registry, ranking #12,817 of 33,421 organizations by block count.