Vendor registration identifies the organization holding a block, not a specific device model, product line, or manufacturing date. This page combines every block IEEE has registered under this exact organization name; it doesn't mean every address in every listed block is currently shipping in a real device.
About AT&T
AT&T's own branded network equipment.
Devices that use these prefixes
- AT&T-branded gateways and set-top boxes
Randomized MAC addresses
Carrier-supplied equipment keeps its registered, fixed addresses; randomization applies to client devices such as phones and laptops.
Assignments by type
| Type | Count |
|---|---|
| MA-L | 5 |
| MA-M | 1 |
Countries in IEEE's registration records
| Country | Blocks |
|---|---|
| 🇺🇸 United States | 6 |
Download this organization's blocks
Get just these assignments as CSV or JSON, generated fresh from the live registry on every request.
6 registered prefixes