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:D8:55:1D:80:00 /36
Vendor address38A Grove Street Ridgefield CT US 06877
Country🇺🇸 United States
RegisteredDec 15, 2013
Block range40:D8:55:1D:80:00– 40:D8:55:1D:8F: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
- Dec 15, 2013 – Nov 13, 2019 Owl Computing Technologies, Inc. name changed
- Nov 13, 2019 – present Owl Cyber Defense Solutions, LLC
Example addresses in this block
Where this block sits
Previous
40:D8:55:1D:70:00 /36
Wheatstone Corporation
Next
40:D8:55:1D:90:00 /36
Commercial Wireless Systems International LLC.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Owl Cyber Defense Solutions, LLC holds 2 registered blocks in the IEEE registry, ranking #2,695 of 33,427 organizations by block count.
Other blocks registered to Owl Cyber Defense Solutions, LLC