Which company owns MAC address prefix 38:17:66?

MAC address prefix 38:17:66 is registered to PROMZAKAZ LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 38:17:66 has a network interface built by PROMZAKAZ LTD..

What is the OUI 38:17:66?

38:17:66 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to PROMZAKAZ LTD.. It covers every address from 38:17:66:00:00:00 to 38:17:66:FF:FF:FF, or 16,777,216 addresses in total. It is also written 38-17-66.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 38:17:66:00:00:00 that is 38:17:66 — 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 PROMZAKAZ LTD. located?

PROMZAKAZ LTD. is listed at Noviy Arbat street, 21 Moscow RU 119019 in the IEEE OUI registry entry for 38:17:66. This is the address the organization registered with the IEEE, which may differ from its current operating address.

PROMZAKAZ LTD.

MAC address prefix 38:17:66 is registered to PROMZAKAZ LTD. in the IEEE OUI registry. Any device whose MAC address begins with 38:17:66 has a network interface built by PROMZAKAZ LTD.. 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 38:17:66:00:00:00 to 38:17:66:FF:FF:FF.

OUI prefix: 38:17:66
Hyphen form: 38-17-66
MAC range: 38:17:66:00:00:00 – 38:17:66:FF:FF:FF
Addresses in block: 16,777,216
Organization: PROMZAKAZ LTD.
Address: Noviy Arbat street, 21 Moscow RU 119019
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 "PROMZAKAZ LTD."
archived source →
2026-07-17Assigned to "PROMZAKAZ LTD."

Nearby in the registry

The prefixes assigned immediately before and after 38:17:66:

FAQ

Which company owns MAC address prefix 38:17:66?: MAC address prefix 38:17:66 is registered to PROMZAKAZ LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 38:17:66 has a network interface built by PROMZAKAZ LTD..
What is the OUI 38:17:66?: 38:17:66 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to PROMZAKAZ LTD.. It covers every address from 38:17:66:00:00:00 to 38:17:66:FF:FF:FF, or 16,777,216 addresses in total. It is also written 38-17-66.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 38:17:66:00:00:00 that is 38:17:66 — 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 PROMZAKAZ LTD. located?: PROMZAKAZ LTD. is listed at Noviy Arbat street, 21 Moscow RU 119019 in the IEEE OUI registry entry for 38:17:66. This is the address the organization registered with the IEEE, which may differ from its current operating address.