MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixE8:F6:D7:80:00:00 /28
Vendor addressRingstrasse, 75 Therwil CH CH-4106
Country🇨🇠Switzerland
RegisteredOct 8, 2025
Block rangeE8:F6:D7:80:00:00– E8:F6:D7:8F: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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E8:F6:D7:70:00:00 /28
CowManager
Next
E8:F6:D7:90:00:00 /28
Hefei BOE Vision-electronic Technology Co.,Ltd.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
INTEGRA Metering AG holds 1 registered blocks in the IEEE registry, ranking #16,275 of 33,427 organizations by block count.