IAB: an Individual Address Block, a /36 covering 4,096 addresses. IEEE's predecessor to MA-S; no longer issued, but existing assignments remain valid.
Prefix40:D8:55:1A:60:00 /36
Vendor addressParque Comercial Europa Loja 20 Pombal PT 3100-371
Country🇵🇹 Portugal
RegisteredNov 3, 2013
Block range40:D8:55:1A:60:00– 40:D8:55:1A:6F:FF
Address capacity4,096
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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40:D8:55:1A:50:00 /36
DemoPad
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40:D8:55:1A:70:00 /36
ENTEC Electric & Electronic CO., LTD
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
RB-LINK Wireless holds 1 registered blocks in the IEEE registry, ranking #24,245 of 33,421 organizations by block count.