Which company owns MAC address prefix A8:57:4E?

MAC address prefix A8:57:4E is registered to TP-LINK TECHNOLOGIES CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A8:57:4E has a network interface built by TP-LINK TECHNOLOGIES CO.,LTD..

What is the OUI A8:57:4E?

A8:57:4E 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 A8:57:4E:00:00:00 to A8:57:4E:FF:FF:FF, or 16,777,216 addresses in total. It is also written A8-57-4E.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A8:57:4E:00:00:00 that is A8:57:4E — 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 Building 24(floors 1,3,4,5)and 28(floors 1-4)Central Science and Technology Park,Shennan Road,Nanshan Shenzhen Guangdong CN 518057 in the IEEE OUI registry entry for A8:57:4E. 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 A8:57:4E 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 A8:57:4E is registered to TP-LINK TECHNOLOGIES CO.,LTD. in the IEEE OUI registry. Any device whose MAC address begins with A8:57:4E 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 A8:57:4E:00:00:00 to A8:57:4E:FF:FF:FF.

OUI prefix: A8:57:4E
Hyphen form: A8-57-4E
MAC range: A8:57:4E:00:00:00 – A8:57:4E:FF:FF:FF
Addresses in block: 16,777,216
Organization: TP-LINK TECHNOLOGIES CO.,LTD.
Address: Building 24(floors 1,3,4,5)and 28(floors 1-4)Central Science and Technology Park,Shennan Road,Nanshan Shenzhen Guangdong CN 518057
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.

2016-07-29Assigned 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 A8:57:4E:

FAQ

Which company owns MAC address prefix A8:57:4E?: MAC address prefix A8:57:4E is registered to TP-LINK TECHNOLOGIES CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A8:57:4E has a network interface built by TP-LINK TECHNOLOGIES CO.,LTD..
What is the OUI A8:57:4E?: A8:57:4E 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 A8:57:4E:00:00:00 to A8:57:4E:FF:FF:FF, or 16,777,216 addresses in total. It is also written A8-57-4E.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A8:57:4E:00:00:00 that is A8:57:4E — 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 Building 24(floors 1,3,4,5)and 28(floors 1-4)Central Science and Technology Park,Shennan Road,Nanshan Shenzhen Guangdong CN 518057 in the IEEE OUI registry entry for A8:57:4E. 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 A8:57:4E is one. A device made by TP-LINK TECHNOLOGIES CO.,LTD. could carry a MAC address from any of them.