MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:40:FB:00:00:00 /24
Vendor addressPRODUCTION QUALITY ENGINEER WESTFORD MA US 01886
Country🇺🇸 United States
RegisteredSep 8, 2000
Block range00:40:FB:00:00:00– 00:40:FB: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
- Sep 8, 2000 – Nov 4, 2015 CASCADE COMMUNICATIONS CORP. name changedaddress changed
- Nov 4, 2015 – present CASCADE COMMUNICATIONS
Example addresses in this block
Where this block sits
Previous
00:40:FA:00:00:00 /24
MICROBOARDS, INC.
Next
00:40:FC:00:00:00 /24
IBR COMPUTER TECHNIK GMBH
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
CASCADE COMMUNICATIONS holds 2 registered blocks in the IEEE registry, ranking #1,696 of 33,427 organizations by block count.
Other blocks registered to CASCADE COMMUNICATIONS