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:D0:00:00 /28
Vendor addressUnit 5 Miller Court Tewkesbury Gloucestershire GB GL20 8DN
Country🇬🇧 United Kingdom
RegisteredApr 22, 2018
Block range04:C3:E6:D0:00:00– 04:C3:E6:DF: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
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04:C3:E6:C0:00:00 /28
SHANTOU YINGSHENG IMPORT & EXPORT TRADING CO.,LTD.
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04:C3:E6:E0:00:00 /28
Great Talent Technology Limited
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Amiosec Ltd holds 1 registered blocks in the IEEE registry, ranking #4,970 of 33,421 organizations by block count.