macadress

Adtran Inc

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
PrefixAC:51:EE:00:00:00 /24
Vendor addressSheraton House Cambridge Cambridgeshire GB CB3 0AX
Country🇬🇧  United Kingdom
RegisteredFeb 2, 2012
Block rangeAC:51:EE:00:00:00– AC:51:EE: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

  1. Feb 2, 2012 – Nov 1, 2022 Cambridge Communication Systems Ltd name changed
  2. Nov 1, 2022 – Nov 9, 2022 Adtran, Inc name changed
  3. Nov 9, 2022 – present Adtran Inc

Example addresses in this block

AC:51:EE:00:00:00 AC:51:EE:7F:FF:FF AC:51:EE:FF:FF:FF

Where this block sits

Adtran Inc holds 15 registered blocks in the IEEE registry, ranking #210 of 33,421 organizations by block count.

Other blocks registered to Adtran Inc

00:01:4F:00:00:00 /24 MA-L 00:19:92:00:00:00 /24 MA-L 00:24:45:00:00:00 /24 MA-L 00:A0:C8:00:00:00 /24 MA-L 20:5F:3D:00:00:00 /24 MA-L 28:D0:CB:00:00:00 /24 MA-L 38:F8:F6:00:00:00 /24 MA-L 54:22:E0:00:00:00 /24 MA-L 58:87:85:00:00:00 /24 MA-L 64:A0:AC:00:00:00 /24 MA-L 84:4D:4C:00:00:00 /24 MA-L AC:13:9C:00:00:00 /24 MA-L