Which company owns MAC address prefix 44:5F:7A?

MAC address prefix 44:5F:7A is registered to Shihlin Electric & Engineering Corp. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 44:5F:7A has a network interface built by Shihlin Electric & Engineering Corp..

What is the OUI 44:5F:7A?

44:5F:7A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Shihlin Electric & Engineering Corp.. It covers every address from 44:5F:7A:00:00:00 to 44:5F:7A:FF:FF:FF, or 16,777,216 addresses in total. It is also written 44-5F-7A.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 44:5F:7A:00:00:00 that is 44:5F:7A — 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 Shihlin Electric & Engineering Corp. located?

Shihlin Electric & Engineering Corp. is listed at 16F NO.88, SEC, 6, CHUNG SHAN N. RD., TAIPEI HsinChu HsinFun Shiang TW 304 in the IEEE OUI registry entry for 44:5F:7A. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Shihlin Electric & Engineering Corp.

MAC address prefix 44:5F:7A is registered to Shihlin Electric & Engineering Corp. in the IEEE OUI registry. Any device whose MAC address begins with 44:5F:7A has a network interface built by Shihlin Electric & Engineering Corp.. 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 44:5F:7A:00:00:00 to 44:5F:7A:FF:FF:FF.

OUI prefix: 44:5F:7A
Hyphen form: 44-5F-7A
MAC range: 44:5F:7A:00:00:00 – 44:5F:7A:FF:FF:FF
Addresses in block: 16,777,216
Organization: Shihlin Electric & Engineering Corp.
Address: 16F NO.88, SEC, 6, CHUNG SHAN N. RD., TAIPEI HsinChu HsinFun Shiang TW 304
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 "Shihlin Electric & Engineering Corp."
archived source →
2026-07-17Assigned to "Shihlin Electric & Engineering Corp."

Nearby in the registry

The prefixes assigned immediately before and after 44:5F:7A:

FAQ

Which company owns MAC address prefix 44:5F:7A?: MAC address prefix 44:5F:7A is registered to Shihlin Electric & Engineering Corp. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 44:5F:7A has a network interface built by Shihlin Electric & Engineering Corp..
What is the OUI 44:5F:7A?: 44:5F:7A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Shihlin Electric & Engineering Corp.. It covers every address from 44:5F:7A:00:00:00 to 44:5F:7A:FF:FF:FF, or 16,777,216 addresses in total. It is also written 44-5F-7A.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 44:5F:7A:00:00:00 that is 44:5F:7A — 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 Shihlin Electric & Engineering Corp. located?: Shihlin Electric & Engineering Corp. is listed at 16F NO.88, SEC, 6, CHUNG SHAN N. RD., TAIPEI HsinChu HsinFun Shiang TW 304 in the IEEE OUI registry entry for 44:5F:7A. This is the address the organization registered with the IEEE, which may differ from its current operating address.