macadress

IBM Corp

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:17:EF:00:00:00 /24
Vendor address2051 Mission College Blvd Santa Clara CA US 95054
Country🇺🇸  United States
RegisteredApr 13, 2006
Block range00:17:EF:00:00:00– 00:17:EF: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. Apr 13, 2006 – Apr 15, 2011 Blade Network Technologies, Inc. name changedaddress changed
  2. Apr 15, 2011 – present IBM Corp

Example addresses in this block

00:17:EF:00:00:00 00:17:EF:7F:FF:FF 00:17:EF:FF:FF:FF

Where this block sits

Previous 00:17:EE:00:00:00 /24 Commscope Next 00:17:F0:00:00:00 /24 SZCOM Broadband Network Technology Co.,Ltd

The nearest registered blocks of the same size on either side of this one in IEEE's address space.

IBM Corp holds 22 registered blocks in the IEEE registry, ranking #157 of 33,421 organizations by block count.

Other blocks registered to IBM Corp

00:02:55:00:00:00 /24 MA-L 00:04:AC:00:00:00 /24 MA-L 00:06:29:00:00:00 /24 MA-L 00:09:6B:00:00:00 /24 MA-L 00:0D:60:00:00:00 /24 MA-L 00:11:25:00:00:00 /24 MA-L 00:14:5E:00:00:00 /24 MA-L 00:18:B1:00:00:00 /24 MA-L 00:1A:64:00:00:00 /24 MA-L 00:20:35:00:00:00 /24 MA-L 00:21:5E:00:00:00 /24 MA-L 00:22:00:00:00:00 /24 MA-L