ActivNetworks MAC Prefix 00:12:03 — Registry Assignment
Summary
- // what this is
- ActivNetworks is registered to MAC prefix
00:12:03in the IEEE OUI database. When a device's MAC address begins with00:12:03, that block was registered by ActivNetworks — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- This 24-bit prefix fixes the Group and Local bits in its first octet, 00, at 0 and 0. Matching requires the first three octets 00:12:03; the remaining 24 bits allow 16,777,216 suffix values, not a device or shipment count. A match establishes the registry assignment only, not a specific device or deployment.
About this vendor.
A MAC address beginning 00:12:03 matches an IEEE MA-L assignment registered to ActivNetworks. The prefix identifies the registry entry; the supplied evidence does not identify a device type or show that a particular product uses it. A matching address alone cannot establish the device’s operating system, current owner, or security status.
This is a 24-bit prefix: the first three octets, 00:12:03, form the match. The remaining 24 bits allow 16,777,216 possible suffix values. That is a count of possible address suffixes, not a count of devices, deployments, or shipments.
The first octet is 00, so the Group bit and Local bit are both clear and fixed for this exact prefix. Changing either bit produces a different prefix. RFC 7042 explains these bits’ role in MAC addresses and describes the 48-bit identifier structure; the assignment itself does not demonstrate how any address is deployed. The IEEE CSV record gives no assignment date.
- Registry match
- ActivNetworks, MA-L, prefix
00:12:03[Confirmed] — https://standards-oui.ieee.org/oui/oui.csv - Country
- France, indicated by the country code in the IEEE record [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Device category
- Unknown; no supplied source maps a device category to this prefix [Unknown]
- Registry
- MA-L [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Company
- ActivNetworks [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Prefix
00:12:03[Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Country
- France [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Device type
- Unknown [Unknown]
- Industry
- Unknown [Unknown]
- Notable products
- Unknown [Unknown]
- Website
- Unknown [Unknown]
- Organization status
- Unknown [Unknown]
- Related vendors
- Unknown [Unknown]
- Historic prefix
- Unknown [Unknown]