Which company owns MAC address prefix 10:7A:86?

MAC address prefix 10:7A:86 is registered to U&U ENGINEERING INC. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 10:7A:86 has a network interface built by U&U ENGINEERING INC..

What is the OUI 10:7A:86?

10:7A:86 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to U&U ENGINEERING INC.. It covers every address from 10:7A:86:00:00:00 to 10:7A:86:FF:FF:FF, or 16,777,216 addresses in total. It is also written 10-7A-86.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 10:7A:86:00:00:00 that is 10:7A:86 — 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 U&U ENGINEERING INC. located?

U&U ENGINEERING INC. is listed at No.15, Gaoyang S. Rd Taoyuan County TW 325-44 in the IEEE OUI registry entry for 10:7A:86. This is the address the organization registered with the IEEE, which may differ from its current operating address.

U&U ENGINEERING INC.

MAC address prefix 10:7A:86 is registered to U&U ENGINEERING INC. in the IEEE OUI registry. Any device whose MAC address begins with 10:7A:86 has a network interface built by U&U ENGINEERING INC.. 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 10:7A:86:00:00:00 to 10:7A:86:FF:FF:FF.

OUI prefix: 10:7A:86
Hyphen form: 10-7A-86
MAC range: 10:7A:86:00:00:00 – 10:7A:86:FF:FF:FF
Addresses in block: 16,777,216
Organization: U&U ENGINEERING INC.
Address: No.15, Gaoyang S. Rd Taoyuan County TW 325-44
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.

Assignment history (2)

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 "U&U ENGINEERING INC."
archived source →
2026-07-17Assigned to "U&U ENGINEERING INC."

Nearby in the registry

The prefixes assigned immediately before and after 10:7A:86:

FAQ

Which company owns MAC address prefix 10:7A:86?: MAC address prefix 10:7A:86 is registered to U&U ENGINEERING INC. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 10:7A:86 has a network interface built by U&U ENGINEERING INC..
What is the OUI 10:7A:86?: 10:7A:86 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to U&U ENGINEERING INC.. It covers every address from 10:7A:86:00:00:00 to 10:7A:86:FF:FF:FF, or 16,777,216 addresses in total. It is also written 10-7A-86.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 10:7A:86:00:00:00 that is 10:7A:86 — 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 U&U ENGINEERING INC. located?: U&U ENGINEERING INC. is listed at No.15, Gaoyang S. Rd Taoyuan County TW 325-44 in the IEEE OUI registry entry for 10:7A:86. This is the address the organization registered with the IEEE, which may differ from its current operating address.