macadress

NETSCOUT SYSTEMS INC

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix04:9F:81:00:00:00 /24
Vendor address310 Littleton Road Westford MA US 01886
Country🇺🇸  United States
RegisteredNov 6, 2009
Block range04:9F:81:00:00:00– 04:9F:81: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. Nov 6, 2009 – Apr 12, 2013 Simena, LLC name changedaddress changed
  2. Apr 12, 2013 – Mar 30, 2019 Netscout Systems, Inc. name changed
  3. Mar 30, 2019 – Jan 30, 2021 NetAlly name changed
  4. Jan 30, 2021 – present NETSCOUT SYSTEMS INC

Example addresses in this block

04:9F:81:00:00:00 04:9F:81:7F:FF:FF 04:9F:81:FF:FF:FF

Where this block sits

NETSCOUT SYSTEMS INC holds 4 registered blocks in the IEEE registry, ranking #785 of 33,421 organizations by block count.

Other blocks registered to NETSCOUT SYSTEMS INC

00:80:8C:00:00:00 /24 MA-L 00:A0:0E:00:00:00 /24 MA-L D8:E7:2B:00:00:00 /24 MA-L