Which company owns MAC address prefix 44:9B:C6?

MAC address prefix 44:9B:C6 is registered to EOSS s.r.l. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 44:9B:C6 has a network interface built by EOSS s.r.l..

What is the OUI 44:9B:C6?

44:9B:C6 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to EOSS s.r.l.. It covers every address from 44:9B:C6:00:00:00 to 44:9B:C6:FF:FF:FF, or 16,777,216 addresses in total. It is also written 44-9B-C6.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 44:9B:C6:00:00:00 that is 44:9B:C6 — 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 EOSS s.r.l. located?

EOSS s.r.l. is listed at Via Chiese 6 Milan IT IT20126 in the IEEE OUI registry entry for 44:9B:C6. This is the address the organization registered with the IEEE, which may differ from its current operating address.

EOSS s.r.l.

MAC address prefix 44:9B:C6 is registered to EOSS s.r.l. in the IEEE OUI registry. Any device whose MAC address begins with 44:9B:C6 has a network interface built by EOSS s.r.l.. 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 44:9B:C6:00:00:00 to 44:9B:C6:FF:FF:FF.

OUI prefix: 44:9B:C6
Hyphen form: 44-9B-C6
MAC range: 44:9B:C6:00:00:00 – 44:9B:C6:FF:FF:FF
Addresses in block: 16,777,216
Organization: EOSS s.r.l.
Address: Via Chiese 6 Milan IT IT20126
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.

2026-01-08Assigned to "EOSS s.r.l."
archived source →
2026-07-17Assigned to "EOSS s.r.l."

Nearby in the registry

The prefixes assigned immediately before and after 44:9B:C6:

FAQ

Which company owns MAC address prefix 44:9B:C6?: MAC address prefix 44:9B:C6 is registered to EOSS s.r.l. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 44:9B:C6 has a network interface built by EOSS s.r.l..
What is the OUI 44:9B:C6?: 44:9B:C6 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to EOSS s.r.l.. It covers every address from 44:9B:C6:00:00:00 to 44:9B:C6:FF:FF:FF, or 16,777,216 addresses in total. It is also written 44-9B-C6.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 44:9B:C6:00:00:00 that is 44:9B:C6 — 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 EOSS s.r.l. located?: EOSS s.r.l. is listed at Via Chiese 6 Milan IT IT20126 in the IEEE OUI registry entry for 44:9B:C6. This is the address the organization registered with the IEEE, which may differ from its current operating address.