macadress

Amazon Technologies Inc.

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix28:EF:01:00:00:00 /24
Vendor addressP.O Box 8102 Reno NV US 89507
Country🇺🇸  United States
RegisteredDec 15, 2009
Block range28:EF:01:00:00:00– 28:EF:01: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. Dec 15, 2009 – Dec 18, 2020 Private name changedaddress changedcountry changed
  2. Dec 18, 2020 – present Amazon Technologies Inc.

Example addresses in this block

28:EF:01:00:00:00 28:EF:01:7F:FF:FF 28:EF:01:FF:FF:FF

Where this block sits

Amazon Technologies Inc. holds 206 registered blocks in the IEEE registry, ranking #16 of 33,427 organizations by block count.

Other blocks registered to Amazon Technologies Inc.

00:71:47:00:00:00 /24 MA-L 00:86:21:00:00:00 /24 MA-L 00:BB:3A:00:00:00 /24 MA-L 00:F3:61:00:00:00 /24 MA-L 00:FC:8B:00:00:00 /24 MA-L 08:12:A5:00:00:00 /24 MA-L 08:57:FB:00:00:00 /24 MA-L 08:6A:E5:00:00:00 /24 MA-L 08:7B:0F:00:00:00 /24 MA-L 08:7C:39:00:00:00 /24 MA-L 08:84:9D:00:00:00 /24 MA-L 08:91:15:00:00:00 /24 MA-L