macadress

Extreme Networks, Inc.

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
PrefixB4:C7:99:00:00:00 /24
Vendor address2121 RDU Center Drive Morrisville NC US 27560
Country🇺🇸  United States
RegisteredApr 15, 2011
Block rangeB4:C7:99:00:00:00– B4:C7:99: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 15, 2011 – Nov 4, 2014 Motorola Solutions Inc. name changedaddress changed
  2. Nov 4, 2014 – Nov 8, 2016 Zebra Technologies Inc name changed
  3. Nov 8, 2016 – Sep 14, 2017 Extreme Networks name changedaddress changed
  4. Sep 14, 2017 – Jul 15, 2023 Extreme Networks, Inc. name changedaddress changed
  5. Jul 15, 2023 – Jun 26, 2026 Extreme Networks Headquarters name changed
  6. Jun 26, 2026 – present Extreme Networks, Inc.

Dates show when a change became public in the IEEE registry. How we track ownership history →

Example addresses in this block

B4:C7:99:00:00:00 B4:C7:99:7F:FF:FF B4:C7:99:FF:FF:FF

Where this block sits

Extreme Networks, Inc. holds 100 registered blocks in the IEEE registry, ranking #34 of 33,498 organizations by block count.

Other blocks registered to Extreme Networks, Inc.

00:01:30:00:00:00 /24 MA-L 00:04:96:00:00:00 /24 MA-L 00:19:77:00:00:00 /24 MA-L 00:89:C9:00:00:00 /24 MA-L 00:B8:1D:00:00:00 /24 MA-L 00:DC:B2:00:00:00 /24 MA-L 00:E0:2B:00:00:00 /24 MA-L 00:E6:0E:00:00:00 /24 MA-L 08:EA:44:00:00:00 /24 MA-L 0C:9B:78:00:00:00 /24 MA-L 0C:ED:71:00:00:00 /24 MA-L 14:BA:A2:00:00:00 /24 MA-L