Which company owns MAC address prefix 10:F1:63?

MAC address prefix 10:F1:63 is registered to TNK CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 10:F1:63 has a network interface built by TNK CO.,LTD.

What is the OUI 10:F1:63?

10:F1:63 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to TNK CO.,LTD. It covers every address from 10:F1:63:00:00:00 to 10:F1:63:FF:FF:FF, or 16,777,216 addresses in total. It is also written 10-F1-63.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 10:F1:63:00:00:00 that is 10:F1:63 — 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 TNK CO.,LTD located?

TNK CO.,LTD is listed at 1 Kasugayama.Iitoyo Tenei-village.Iwase-country Fukushima-prefecture JP 962-0512 in the IEEE OUI registry entry for 10:F1:63. This is the address the organization registered with the IEEE, which may differ from its current operating address.

TNK CO.,LTD

MAC address prefix 10:F1:63 is registered to TNK CO.,LTD in the IEEE OUI registry. Any device whose MAC address begins with 10:F1:63 has a network interface built by TNK CO.,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 10:F1:63:00:00:00 to 10:F1:63:FF:FF:FF.

OUI prefix: 10:F1:63
Hyphen form: 10-F1-63
MAC range: 10:F1:63:00:00:00 – 10:F1:63:FF:FF:FF
Addresses in block: 16,777,216
Organization: TNK CO.,LTD
Address: 1 Kasugayama.Iitoyo Tenei-village.Iwase-country Fukushima-prefecture JP 962-0512
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.

2017-09-08Assigned to "TNK CO.,LTD"
archived source →
2026-07-17Assigned to "TNK CO.,LTD"

Nearby in the registry

The prefixes assigned immediately before and after 10:F1:63:

FAQ

Which company owns MAC address prefix 10:F1:63?: MAC address prefix 10:F1:63 is registered to TNK CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 10:F1:63 has a network interface built by TNK CO.,LTD.
What is the OUI 10:F1:63?: 10:F1:63 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to TNK CO.,LTD. It covers every address from 10:F1:63:00:00:00 to 10:F1:63:FF:FF:FF, or 16,777,216 addresses in total. It is also written 10-F1-63.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 10:F1:63:00:00:00 that is 10:F1:63 — 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 TNK CO.,LTD located?: TNK CO.,LTD is listed at 1 Kasugayama.Iitoyo Tenei-village.Iwase-country Fukushima-prefecture JP 962-0512 in the IEEE OUI registry entry for 10:F1:63. This is the address the organization registered with the IEEE, which may differ from its current operating address.