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:C0:00 /36
Vendor addressIhasz u. 10 Budapest HU 1105
CountryðŸ‡ðŸ‡º Hungary
RegisteredNov 10, 2013
Block range40:D8:55:1A:C0:00– 40:D8:55:1A:CF: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 →
Ownership timeline
- Nov 10, 2013 – Aug 25, 2023 ELAN SYSTEMS name changedaddress changed
- Aug 25, 2023 – present Bucher Automation Budapest
Example addresses in this block
Where this block sits
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40:D8:55:1A:B0:00 /36
Rosslare Enterprises Limited
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WICHER DIGITAL TECHNIK
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Bucher Automation Budapest holds 6 registered blocks in the IEEE registry, ranking #478 of 33,421 organizations by block count.
Other blocks registered to Bucher Automation Budapest