Which company owns MAC address prefix 60:11:99?

MAC address prefix 60:11:99 is registered to Siama Systems Inc in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 60:11:99 has a network interface built by Siama Systems Inc.

What is the OUI 60:11:99?

60:11:99 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Siama Systems Inc. It covers every address from 60:11:99:00:00:00 to 60:11:99:FF:FF:FF, or 16,777,216 addresses in total. It is also written 60-11-99.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 60:11:99:00:00:00 that is 60:11:99 — 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 Siama Systems Inc located?

Siama Systems Inc is listed at 410 Saint-Nicolas Street Montreal Quebec CA H2Y 2P5 in the IEEE OUI registry entry for 60:11:99. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Siama Systems Inc

MAC address prefix 60:11:99 is registered to Siama Systems Inc in the IEEE OUI registry. Any device whose MAC address begins with 60:11:99 has a network interface built by Siama Systems Inc. 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 60:11:99:00:00:00 to 60:11:99:FF:FF:FF.

OUI prefix: 60:11:99
Hyphen form: 60-11-99
MAC range: 60:11:99:00:00:00 – 60:11:99:FF:FF:FF
Addresses in block: 16,777,216
Organization: Siama Systems Inc
Address: 410 Saint-Nicolas Street Montreal Quebec CA H2Y 2P5
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 "Siama Systems Inc"
archived source →
2026-07-17Assigned to "Siama Systems Inc"

Nearby in the registry

The prefixes assigned immediately before and after 60:11:99:

FAQ

Which company owns MAC address prefix 60:11:99?: MAC address prefix 60:11:99 is registered to Siama Systems Inc in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 60:11:99 has a network interface built by Siama Systems Inc.
What is the OUI 60:11:99?: 60:11:99 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Siama Systems Inc. It covers every address from 60:11:99:00:00:00 to 60:11:99:FF:FF:FF, or 16,777,216 addresses in total. It is also written 60-11-99.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 60:11:99:00:00:00 that is 60:11:99 — 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 Siama Systems Inc located?: Siama Systems Inc is listed at 410 Saint-Nicolas Street Montreal Quebec CA H2Y 2P5 in the IEEE OUI registry entry for 60:11:99. This is the address the organization registered with the IEEE, which may differ from its current operating address.