Which company owns MAC address prefix A0:42:46?

MAC address prefix A0:42:46 is registered to IT Telecom Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A0:42:46 has a network interface built by IT Telecom Co., Ltd..

What is the OUI A0:42:46?

A0:42:46 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to IT Telecom Co., Ltd.. It covers every address from A0:42:46:00:00:00 to A0:42:46:FF:FF:FF, or 16,777,216 addresses in total. It is also written A0-42-46.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A0:42:46:00:00:00 that is A0:42:46 — 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 IT Telecom Co., Ltd. located?

IT Telecom Co., Ltd. is listed at 517 TheOvalley 555-9 Hogye-dong, Dong An-gu Anyang-si Gyeonggi-do KR 14117 in the IEEE OUI registry entry for A0:42:46. This is the address the organization registered with the IEEE, which may differ from its current operating address.

IT Telecom Co., Ltd.

MAC address prefix A0:42:46 is registered to IT Telecom Co., Ltd. in the IEEE OUI registry. Any device whose MAC address begins with A0:42:46 has a network interface built by IT Telecom 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 A0:42:46:00:00:00 to A0:42:46:FF:FF:FF.

OUI prefix: A0:42:46
Hyphen form: A0-42-46
MAC range: A0:42:46:00:00:00 – A0:42:46:FF:FF:FF
Addresses in block: 16,777,216
Organization: IT Telecom Co., Ltd.
Address: 517 TheOvalley 555-9 Hogye-dong, Dong An-gu Anyang-si Gyeonggi-do KR 14117
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.

2018-12-21Assigned to "IT Telecom Co., Ltd."
archived source →
2026-07-17Assigned to "IT Telecom Co., Ltd."

Nearby in the registry

The prefixes assigned immediately before and after A0:42:46:

FAQ

Which company owns MAC address prefix A0:42:46?: MAC address prefix A0:42:46 is registered to IT Telecom Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A0:42:46 has a network interface built by IT Telecom Co., Ltd..
What is the OUI A0:42:46?: A0:42:46 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to IT Telecom Co., Ltd.. It covers every address from A0:42:46:00:00:00 to A0:42:46:FF:FF:FF, or 16,777,216 addresses in total. It is also written A0-42-46.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A0:42:46:00:00:00 that is A0:42:46 — 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 IT Telecom Co., Ltd. located?: IT Telecom Co., Ltd. is listed at 517 TheOvalley 555-9 Hogye-dong, Dong An-gu Anyang-si Gyeonggi-do KR 14117 in the IEEE OUI registry entry for A0:42:46. This is the address the organization registered with the IEEE, which may differ from its current operating address.