MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:21:3E:00:00:00 /24
Vendor addressOosterdoksstraat 114 Amsterdam North Holland NL 1011 DK
Country🇩🇰 Denmark
RegisteredJun 18, 2008
Block range00:21:3E:00:00:00– 00:21:3E: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 →
Ownership timeline
- Jun 18, 2008 – Oct 20, 2020 TomTom name changedcountry changed
- Oct 20, 2020 – present TomTom International BV
Example addresses in this block
Where this block sits
Previous
00:21:3D:00:00:00 /24
Cermetek Microelectronics, Inc.
Next
00:21:3F:00:00:00 /24
A-Team Technology Ltd.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
TomTom International BV holds 2 registered blocks in the IEEE registry, ranking #3,272 of 33,421 organizations by block count.
Other blocks registered to TomTom International BV