Which company owns MAC address prefix 74:EC:F1?

MAC address prefix 74:EC:F1 is registered to Acumen in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 74:EC:F1 has a network interface built by Acumen.

What is the OUI 74:EC:F1?

74:EC:F1 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Acumen. It covers every address from 74:EC:F1:00:00:00 to 74:EC:F1:FF:FF:FF, or 16,777,216 addresses in total. It is also written 74-EC-F1.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 74:EC:F1:00:00:00 that is 74:EC:F1 — 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 Acumen located?

Acumen is listed at 6F, No.207-3, Sec 3, Beisin Rd Sindian Dist New Taipei City US 23143 in the IEEE OUI registry entry for 74:EC:F1. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Acumen

MAC address prefix 74:EC:F1 is registered to Acumen in the IEEE OUI registry. Any device whose MAC address begins with 74:EC:F1 has a network interface built by Acumen. 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 74:EC:F1:00:00:00 to 74:EC:F1:FF:FF:FF.

OUI prefix: 74:EC:F1
Hyphen form: 74-EC-F1
MAC range: 74:EC:F1:00:00:00 – 74:EC:F1:FF:FF:FF
Addresses in block: 16,777,216
Organization: Acumen
Address: 6F, No.207-3, Sec 3, Beisin Rd Sindian Dist New Taipei City US 23143
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 "Acumen"
archived source →
2026-07-17Assigned to "Acumen"

Nearby in the registry

The prefixes assigned immediately before and after 74:EC:F1:

FAQ

Which company owns MAC address prefix 74:EC:F1?: MAC address prefix 74:EC:F1 is registered to Acumen in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 74:EC:F1 has a network interface built by Acumen.
What is the OUI 74:EC:F1?: 74:EC:F1 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Acumen. It covers every address from 74:EC:F1:00:00:00 to 74:EC:F1:FF:FF:FF, or 16,777,216 addresses in total. It is also written 74-EC-F1.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 74:EC:F1:00:00:00 that is 74:EC:F1 — 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 Acumen located?: Acumen is listed at 6F, No.207-3, Sec 3, Beisin Rd Sindian Dist New Taipei City US 23143 in the IEEE OUI registry entry for 74:EC:F1. This is the address the organization registered with the IEEE, which may differ from its current operating address.