MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:40:9F:00:00:00 /24
Vendor address15 Berkshire Road Mansfield, MA US 02048
Country🇺🇸 United States
RegisteredApr 22, 1998
Block range00:40:9F:00:00:00– 00:40:9F: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
- Apr 22, 1998 – Apr 15, 2011 LANCAST/CASAT TECHNOLOGY, INC. name changedaddress changed
- Apr 15, 2011 – present Telco Systems, Inc.
Example addresses in this block
Where this block sits
Previous
00:40:9E:00:00:00 /24
Concurrent Technologies Ltd.
Next
00:40:A0:00:00:00 /24
GOLDSTAR CO., LTD.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Telco Systems, Inc. holds 6 registered blocks in the IEEE registry, ranking #534 of 33,427 organizations by block count.
Other blocks registered to Telco Systems, Inc.