MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixA4:59:D3:10:00:00 /28
Vendor addressUnit B, The Apex St. Cross Business Park, Monks Brook Newport GB PO30 5XW
Country🇬🇧 United Kingdom
RegisteredDec 12, 2024
Block rangeA4:59:D3:10:00:00– A4:59:D3:1F: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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A4:59:D3:00:00:00 /28
VTECH Technology Corportion
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A4:59:D3:20:00:00 /28
Shenzhen Welltech Cable Co., Ltd
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Rheinmetall Electronics UK Ltd holds 2 registered blocks in the IEEE registry, ranking #2,846 of 33,421 organizations by block count.
Other blocks registered to Rheinmetall Electronics UK Ltd