Which company owns MAC address prefix 30:DE:4B?

MAC address prefix 30:DE:4B is registered to TP-Link Systems Inc in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 30:DE:4B has a network interface built by TP-Link Systems Inc.

What is the OUI 30:DE:4B?

30:DE:4B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to TP-Link Systems Inc. It covers every address from 30:DE:4B:00:00:00 to 30:DE:4B:FF:FF:FF, or 16,777,216 addresses in total. It is also written 30-DE-4B.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 30:DE:4B:00:00:00 that is 30:DE:4B — 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 Systems Inc located?

TP-Link Systems Inc is listed at Room 901,9/F.New East Ocean Centre, 9 Science Museum Road Tsim Sha Tsui Kowloon HK 999077 in the IEEE OUI registry entry for 30:DE:4B. 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 Systems Inc own?

TP-Link Systems Inc holds 46 OUI prefixes in the IEEE registry, of which 30:DE:4B is one. A device made by TP-Link Systems Inc could carry a MAC address from any of them.

TP-Link Systems Inc

MAC address prefix 30:DE:4B is registered to TP-Link Systems Inc in the IEEE OUI registry. Any device whose MAC address begins with 30:DE:4B has a network interface built by TP-Link Systems Inc. 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:DE:4B:00:00:00 to 30:DE:4B:FF:FF:FF.

OUI prefix: 30:DE:4B
Hyphen form: 30-DE-4B
MAC range: 30:DE:4B:00:00:00 – 30:DE:4B:FF:FF:FF
Addresses in block: 16,777,216
Organization: TP-Link Systems Inc
Address: Room 901,9/F.New East Ocean Centre, 9 Science Museum Road Tsim Sha Tsui Kowloon HK 999077
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 Systems Inc

TP-Link Systems Inc holds 46 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (3)

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 Corporation Limited"
archived source →
2025-05-13Renamed from "TP-Link Corporation Limited" to "TP-Link Systems Inc"
archived source →
2026-07-17Assigned to "TP-Link Systems Inc"

Nearby in the registry

The prefixes assigned immediately before and after 30:DE:4B:

FAQ

Which company owns MAC address prefix 30:DE:4B?: MAC address prefix 30:DE:4B is registered to TP-Link Systems Inc in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 30:DE:4B has a network interface built by TP-Link Systems Inc.
What is the OUI 30:DE:4B?: 30:DE:4B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to TP-Link Systems Inc. It covers every address from 30:DE:4B:00:00:00 to 30:DE:4B:FF:FF:FF, or 16,777,216 addresses in total. It is also written 30-DE-4B.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 30:DE:4B:00:00:00 that is 30:DE:4B — 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 Systems Inc located?: TP-Link Systems Inc is listed at Room 901,9/F.New East Ocean Centre, 9 Science Museum Road Tsim Sha Tsui Kowloon HK 999077 in the IEEE OUI registry entry for 30:DE:4B. 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 Systems Inc own?: TP-Link Systems Inc holds 46 OUI prefixes in the IEEE registry, of which 30:DE:4B is one. A device made by TP-Link Systems Inc could carry a MAC address from any of them.