Which company owns MAC address prefix 00:26:57?

MAC address prefix 00:26:57 is registered to OOO NPP EKRA in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:26:57 has a network interface built by OOO NPP EKRA.

What is the OUI 00:26:57?

00:26:57 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to OOO NPP EKRA. It covers every address from 00:26:57:00:00:00 to 00:26:57:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-26-57.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:26:57:00:00:00 that is 00:26:57 — 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 OOO NPP EKRA located?

OOO NPP EKRA is listed at I.Yakovleva St., 3 Cheboksary Chuvash Republic RU 428003 in the IEEE OUI registry entry for 00:26:57. This is the address the organization registered with the IEEE, which may differ from its current operating address.

OOO NPP EKRA

MAC address prefix 00:26:57 is registered to OOO NPP EKRA in the IEEE OUI registry. Any device whose MAC address begins with 00:26:57 has a network interface built by OOO NPP EKRA. 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 00:26:57:00:00:00 to 00:26:57:FF:FF:FF.

OUI prefix: 00:26:57
Hyphen form: 00-26-57
MAC range: 00:26:57:00:00:00 – 00:26:57:FF:FF:FF
Addresses in block: 16,777,216
Organization: OOO NPP EKRA
Address: I.Yakovleva St., 3 Cheboksary Chuvash Republic RU 428003
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 "OOO NPP EKRA"
archived source →
2026-07-17Assigned to "OOO NPP EKRA"

Nearby in the registry

The prefixes assigned immediately before and after 00:26:57:

FAQ

Which company owns MAC address prefix 00:26:57?: MAC address prefix 00:26:57 is registered to OOO NPP EKRA in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:26:57 has a network interface built by OOO NPP EKRA.
What is the OUI 00:26:57?: 00:26:57 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to OOO NPP EKRA. It covers every address from 00:26:57:00:00:00 to 00:26:57:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-26-57.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:26:57:00:00:00 that is 00:26:57 — 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 OOO NPP EKRA located?: OOO NPP EKRA is listed at I.Yakovleva St., 3 Cheboksary Chuvash Republic RU 428003 in the IEEE OUI registry entry for 00:26:57. This is the address the organization registered with the IEEE, which may differ from its current operating address.