MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:03:97:00:00:00 /24
Vendor addressC/O Andrews & Arnold Ltd, Enterprise Court, Downmill Road Bracknell, Berks GB RG12 1QS
Country🇬🇧 United Kingdom
RegisteredNov 9, 2000
Block range00:03:97:00:00:00– 00:03:97: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
- Nov 9, 2000 – Dec 31, 2007 Watchfront Electronics name changedaddress changed
- Dec 31, 2007 – Nov 7, 2017 Watchfront Limited name changedaddress changed
- Nov 7, 2017 – present FireBrick Limited
Example addresses in this block
Where this block sits
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
FireBrick Limited holds 1 registered blocks in the IEEE registry, ranking #12,718 of 33,427 organizations by block count.