MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix1C:87:76:90:00:00 /28
Vendor address103 Ni Terai-machi Nomi-shi Ishikawa JP 923-1121
Country🇯🇵 Japan
RegisteredOct 1, 2015
Block range1C:87:76:90:00:00– 1C:87:76:9F: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
1C:87:76:80:00:00 /28
Guangzhou Video-Star Electronics Co.,Ltd.
Next
1C:87:76:A0:00:00 /28
Jiangsu ETERN COMMUNICATION Co.,ltd
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Tokyo Drawing Ltd. holds 3 registered blocks in the IEEE registry, ranking #1,361 of 33,427 organizations by block count.
Other blocks registered to Tokyo Drawing Ltd.