Which company owns MAC address prefix 80:00:10?

MAC address prefix 80:00:10 is registered to AT&T in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 80:00:10 has a network interface built by AT&T.

What is the OUI 80:00:10?

80:00:10 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to AT&T. It covers every address from 80:00:10:00:00:00 to 80:00:10:FF:FF:FF, or 16,777,216 addresses in total. It is also written 80-00-10.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 80:00:10:00:00:00 that is 80:00:10 — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.

Where is AT&T located?

AT&T is listed at 3300 E Renner Road Richardson TX US 75082 in the IEEE OUI registry entry for 80:00:10. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does AT&T own?

AT&T holds 5 OUI prefixes in the IEEE registry, of which 80:00:10 is one. A device made by AT&T could carry a MAC address from any of them.

AT&T

MAC address prefix 80:00:10 is registered to AT&T in the IEEE OUI registry. Any device whose MAC address begins with 80:00:10 has a network interface built by AT&T. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address — it covers every MAC from 80:00:10:00:00:00 to 80:00:10:FF:FF:FF.

OUI prefix: 80:00:10
Hyphen form: 80-00-10
MAC range: 80:00:10:00:00:00 – 80:00:10:FF:FF:FF
Addresses in block: 16,777,216
Organization: AT&T
Address: 3300 E Renner Road Richardson TX US 75082
Source: IEEE OUI registry

Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.

Other prefixes from AT&T

AT&T holds 5 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (3)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2016-07-29Assigned to "ATT BELL LABORATORIES"
archived source →
2017-09-08Renamed from "ATT BELL LABORATORIES" to "AT&T"
archived source →
2026-07-17Assigned to "AT&T"

Nearby in the registry

The prefixes assigned immediately before and after 80:00:10:

FAQ

Which company owns MAC address prefix 80:00:10?: MAC address prefix 80:00:10 is registered to AT&T in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 80:00:10 has a network interface built by AT&T.
What is the OUI 80:00:10?: 80:00:10 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to AT&T. It covers every address from 80:00:10:00:00:00 to 80:00:10:FF:FF:FF, or 16,777,216 addresses in total. It is also written 80-00-10.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 80:00:10:00:00:00 that is 80:00:10 — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.
Where is AT&T located?: AT&T is listed at 3300 E Renner Road Richardson TX US 75082 in the IEEE OUI registry entry for 80:00:10. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does AT&T own?: AT&T holds 5 OUI prefixes in the IEEE registry, of which 80:00:10 is one. A device made by AT&T could carry a MAC address from any of them.