Which company owns MAC address prefix 30:B3:46?

MAC address prefix 30:B3:46 is registered to CJSC NORSI-TRANS in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 30:B3:46 has a network interface built by CJSC NORSI-TRANS.

What is the OUI 30:B3:46?

30:B3:46 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CJSC NORSI-TRANS. It covers every address from 30:B3:46:00:00:00 to 30:B3:46:FF:FF:FF, or 16,777,216 addresses in total. It is also written 30-B3-46.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 30:B3:46:00:00:00 that is 30:B3:46 — 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 CJSC NORSI-TRANS located?

CJSC NORSI-TRANS is listed at B.Novodmitrovskaya, 12/15 floor 2 r. 36 Moscow MOSCOW RU 127015 in the IEEE OUI registry entry for 30:B3:46. This is the address the organization registered with the IEEE, which may differ from its current operating address.

CJSC NORSI-TRANS

MAC address prefix 30:B3:46 is registered to CJSC NORSI-TRANS in the IEEE OUI registry. Any device whose MAC address begins with 30:B3:46 has a network interface built by CJSC NORSI-TRANS. 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 30:B3:46:00:00:00 to 30:B3:46:FF:FF:FF.

OUI prefix: 30:B3:46
Hyphen form: 30-B3-46
MAC range: 30:B3:46:00:00:00 – 30:B3:46:FF:FF:FF
Addresses in block: 16,777,216
Organization: CJSC NORSI-TRANS
Address: B.Novodmitrovskaya, 12/15 floor 2 r. 36 Moscow 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.

2021-06-10Assigned to "CJSC NORSI-TRANS"
archived source →
2026-07-17Assigned to "CJSC NORSI-TRANS"

Nearby in the registry

The prefixes assigned immediately before and after 30:B3:46:

FAQ

Which company owns MAC address prefix 30:B3:46?: MAC address prefix 30:B3:46 is registered to CJSC NORSI-TRANS in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 30:B3:46 has a network interface built by CJSC NORSI-TRANS.
What is the OUI 30:B3:46?: 30:B3:46 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CJSC NORSI-TRANS. It covers every address from 30:B3:46:00:00:00 to 30:B3:46:FF:FF:FF, or 16,777,216 addresses in total. It is also written 30-B3-46.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 30:B3:46:00:00:00 that is 30:B3:46 — 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 CJSC NORSI-TRANS located?: CJSC NORSI-TRANS is listed at B.Novodmitrovskaya, 12/15 floor 2 r. 36 Moscow MOSCOW RU 127015 in the IEEE OUI registry entry for 30:B3:46. This is the address the organization registered with the IEEE, which may differ from its current operating address.