CID: a Company ID, not a MAC OUI. It identifies an organization for use in other IEEE 802 protocols, most commonly locally administered ELI-quadrant addresses, rather than being burned into hardware directly.
Prefix3A:A3:F8:00:00:00 /24
Vendor addressIEEE 802.1 Chair, c/o RAC Administrator, IEEE Piscataway NJ US 08554
Country🇺🇸 United States
RegisteredMay 28, 2017
Block range3A:A3:F8:00:00:00– 3A:A3:F8:FF:FF:FF
Address capacity16,777,216
AdministrationLocally administered: set by software, not burned into hardware
TransmissionUnicast: addressed to a single device
IEEE 802c quadrantELI: Extended Local Identifier
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
- May 28, 2017 – Oct 2, 2021 IEEE 802.1 Working Group name changedaddress changed
- Oct 2, 2021 – Sep 21, 2026 IEEE 802.1 Chair name changedaddress changed
- Sep 21, 2026 – present IEEE 802.1 Working Group
Example addresses in this block
Where this block sits
IEEE 802.1 Working Group holds 6 registered blocks in the IEEE registry, ranking #503 of 33,427 organizations by block count.
Other blocks registered to IEEE 802.1 Working Group