Which company owns MAC address prefix A4:1A:3A?

MAC address prefix A4:1A:3A is registered to TP-LINK TECHNOLOGIES CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A4:1A:3A has a network interface built by TP-LINK TECHNOLOGIES CO.,LTD..

What is the OUI A4:1A:3A?

A4:1A:3A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to TP-LINK TECHNOLOGIES CO.,LTD.. It covers every address from A4:1A:3A:00:00:00 to A4:1A:3A:FF:FF:FF, or 16,777,216 addresses in total. It is also written A4-1A-3A.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A4:1A:3A:00:00:00 that is A4:1A:3A — 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 TP-LINK TECHNOLOGIES CO.,LTD. located?

TP-LINK TECHNOLOGIES CO.,LTD. is listed at 2-7th floors of South Building and 3-11th floors of North Building, No. 396, Jucai Road, Changhe Street, Binjiang District Hangzhou City Zhejiang Province, CN 310000 in the IEEE OUI registry entry for A4:1A:3A. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does TP-LINK TECHNOLOGIES CO.,LTD. own?

TP-LINK TECHNOLOGIES CO.,LTD. holds 174 OUI prefixes in the IEEE registry, of which A4:1A:3A is one. A device made by TP-LINK TECHNOLOGIES CO.,LTD. could carry a MAC address from any of them.

TP-LINK TECHNOLOGIES CO.,LTD.

MAC address prefix A4:1A:3A is registered to TP-LINK TECHNOLOGIES CO.,LTD. in the IEEE OUI registry. Any device whose MAC address begins with A4:1A:3A has a network interface built by TP-LINK TECHNOLOGIES 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 A4:1A:3A:00:00:00 to A4:1A:3A:FF:FF:FF.

OUI prefix: A4:1A:3A
Hyphen form: A4-1A-3A
MAC range: A4:1A:3A:00:00:00 – A4:1A:3A:FF:FF:FF
Addresses in block: 16,777,216
Organization: TP-LINK TECHNOLOGIES CO.,LTD.
Address: 2-7th floors of South Building and 3-11th floors of North Building, No. 396, Jucai Road, Changhe Street, Binjiang District Hangzhou City Zhejiang Province, CN 310000
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.

Other prefixes from TP-LINK TECHNOLOGIES CO.,LTD.

TP-LINK TECHNOLOGIES CO.,LTD. holds 174 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (2)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2022-07-11Assigned to "TP-LINK TECHNOLOGIES CO.,LTD."
archived source →
2026-07-17Assigned to "TP-LINK TECHNOLOGIES CO.,LTD."

Nearby in the registry

The prefixes assigned immediately before and after A4:1A:3A:

FAQ

Which company owns MAC address prefix A4:1A:3A?: MAC address prefix A4:1A:3A is registered to TP-LINK TECHNOLOGIES CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A4:1A:3A has a network interface built by TP-LINK TECHNOLOGIES CO.,LTD..
What is the OUI A4:1A:3A?: A4:1A:3A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to TP-LINK TECHNOLOGIES CO.,LTD.. It covers every address from A4:1A:3A:00:00:00 to A4:1A:3A:FF:FF:FF, or 16,777,216 addresses in total. It is also written A4-1A-3A.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A4:1A:3A:00:00:00 that is A4:1A:3A — 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 TP-LINK TECHNOLOGIES CO.,LTD. located?: TP-LINK TECHNOLOGIES CO.,LTD. is listed at 2-7th floors of South Building and 3-11th floors of North Building, No. 396, Jucai Road, Changhe Street, Binjiang District Hangzhou City Zhejiang Province, CN 310000 in the IEEE OUI registry entry for A4:1A:3A. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does TP-LINK TECHNOLOGIES CO.,LTD. own?: TP-LINK TECHNOLOGIES CO.,LTD. holds 174 OUI prefixes in the IEEE registry, of which A4:1A:3A is one. A device made by TP-LINK TECHNOLOGIES CO.,LTD. could carry a MAC address from any of them.