Which company owns MAC address prefix AC:4B:1E?

MAC address prefix AC:4B:1E is registered to Integri-Sys.Com LLC in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:4B:1E has a network interface built by Integri-Sys.Com LLC.

What is the OUI AC:4B:1E?

AC:4B:1E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Integri-Sys.Com LLC. It covers every address from AC:4B:1E:00:00:00 to AC:4B:1E:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-4B-1E.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in AC:4B:1E:00:00:00 that is AC:4B:1E — 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 Integri-Sys.Com LLC located?

Integri-Sys.Com LLC is listed at 9130 South Dadeland Bvld. Suite 1509 Miami FL US 33156 in the IEEE OUI registry entry for AC:4B:1E. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Integri-Sys.Com LLC

MAC address prefix AC:4B:1E is registered to Integri-Sys.Com LLC in the IEEE OUI registry. Any device whose MAC address begins with AC:4B:1E has a network interface built by Integri-Sys.Com LLC. 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 AC:4B:1E:00:00:00 to AC:4B:1E:FF:FF:FF.

OUI prefix: AC:4B:1E
Hyphen form: AC-4B-1E
MAC range: AC:4B:1E:00:00:00 – AC:4B:1E:FF:FF:FF
Addresses in block: 16,777,216
Organization: Integri-Sys.Com LLC
Address: 9130 South Dadeland Bvld. Suite 1509 Miami FL US 33156
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.

2020-03-21Assigned to "Integri-Sys.Com LLC"
archived source →
2026-07-17Assigned to "Integri-Sys.Com LLC"

Nearby in the registry

The prefixes assigned immediately before and after AC:4B:1E:

FAQ

Which company owns MAC address prefix AC:4B:1E?: MAC address prefix AC:4B:1E is registered to Integri-Sys.Com LLC in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:4B:1E has a network interface built by Integri-Sys.Com LLC.
What is the OUI AC:4B:1E?: AC:4B:1E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Integri-Sys.Com LLC. It covers every address from AC:4B:1E:00:00:00 to AC:4B:1E:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-4B-1E.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in AC:4B:1E:00:00:00 that is AC:4B:1E — 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 Integri-Sys.Com LLC located?: Integri-Sys.Com LLC is listed at 9130 South Dadeland Bvld. Suite 1509 Miami FL US 33156 in the IEEE OUI registry entry for AC:4B:1E. This is the address the organization registered with the IEEE, which may differ from its current operating address.