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:87:79:90:00:00 /28
Vendor addressCalle la Fragua, 6 Tres Cantos Madrid ES 28760
Country🇪🇸 Spain
RegisteredOct 17, 2015
Block range1C:87:79:90:00:00– 1C:87:79:9F: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:87:79:80:00:00 /28
ZHEJIANG ITENAL TECHNOLOGY CO.,LTD
Next
1C:87:79:A0:00:00 /28
Hangzhou Xiaowen Intelligent Technology Co., Ltd.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Istria soluciones de criptografia, S. A. holds 1 registered blocks in the IEEE registry, ranking #16,797 of 33,421 organizations by block count.