MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:19:FF:00:00:00 /24
Vendor address800 West Cummings Park Woburn MA US 01801
Country🇺🇸 United States
RegisteredOct 16, 2006
Block range00:19:FF:00:00:00– 00:19:FF: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 →
Example addresses in this block
Where this block sits
Previous
00:19:FE:00:00:00 /24
SHENZHEN SEECOMM TECHNOLOGY CO.,LTD.
Next
00:1A:00:00:00:00 /24
MATRIX INC.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Finnzymes holds 1 registered blocks in the IEEE registry, ranking #12,711 of 33,427 organizations by block count.