Which company owns MAC address prefix E4:F3:27?

MAC address prefix E4:F3:27 is registered to ATOL LLC in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E4:F3:27 has a network interface built by ATOL LLC.

What is the OUI E4:F3:27?

E4:F3:27 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ATOL LLC. It covers every address from E4:F3:27:00:00:00 to E4:F3:27:FF:FF:FF, or 16,777,216 addresses in total. It is also written E4-F3-27.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in E4:F3:27:00:00:00 that is E4:F3:27 — 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 ATOL LLC located?

ATOL LLC is listed at Bolshaya Novodmitrovskaya str., 14, build 4 Moscow RU 127015 in the IEEE OUI registry entry for E4:F3:27. This is the address the organization registered with the IEEE, which may differ from its current operating address.

ATOL LLC

MAC address prefix E4:F3:27 is registered to ATOL LLC in the IEEE OUI registry. Any device whose MAC address begins with E4:F3:27 has a network interface built by ATOL 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 E4:F3:27:00:00:00 to E4:F3:27:FF:FF:FF.

OUI prefix: E4:F3:27
Hyphen form: E4-F3-27
MAC range: E4:F3:27:00:00:00 – E4:F3:27:FF:FF:FF
Addresses in block: 16,777,216
Organization: ATOL LLC
Address: Bolshaya Novodmitrovskaya str., 14, build 4 Moscow RU 127015
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 "ATOL LLC"
archived source →
2026-07-17Assigned to "ATOL LLC"

Nearby in the registry

The prefixes assigned immediately before and after E4:F3:27:

FAQ

Which company owns MAC address prefix E4:F3:27?: MAC address prefix E4:F3:27 is registered to ATOL LLC in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E4:F3:27 has a network interface built by ATOL LLC.
What is the OUI E4:F3:27?: E4:F3:27 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ATOL LLC. It covers every address from E4:F3:27:00:00:00 to E4:F3:27:FF:FF:FF, or 16,777,216 addresses in total. It is also written E4-F3-27.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in E4:F3:27:00:00:00 that is E4:F3:27 — 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 ATOL LLC located?: ATOL LLC is listed at Bolshaya Novodmitrovskaya str., 14, build 4 Moscow RU 127015 in the IEEE OUI registry entry for E4:F3:27. This is the address the organization registered with the IEEE, which may differ from its current operating address.