MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix28:87:5F:00:00:00 /24
Vendor addressMatam Scientific Industries Center, Building 8.2 Mail box 15123 Haifa IL 3508409
Country🇮🇱 Israel
RegisteredMar 12, 2026
Block range28:87:5F:00:00:00– 28:87:5F:FF:FF:FF
Address capacity16,777,216
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
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Annapurna labs holds 157 registered blocks in the IEEE registry, ranking #23 of 33,421 organizations by block count.
Other blocks registered to Annapurna labs
18:96:77:00:00:00 /24
MA-L
30:8B:23:00:00:00 /24
MA-L
50:62:45:00:00:00 /24
MA-L
54:A3:56:00:00:00 /24
MA-L
F8:F2:95:00:00:00 /24
MA-L
00:69:67:00:00:00 /28
MA-M
00:6A:5E:90:00:00 /28
MA-M
00:6A:5E:A0:00:00 /28
MA-M
00:8D:F4:60:00:00 /28
MA-M
04:A1:6F:80:00:00 /28
MA-M
04:C9:8B:40:00:00 /28
MA-M
04:C9:8B:60:00:00 /28
MA-M