Which company owns MAC address prefix 20:36:5B?

MAC address prefix 20:36:5B is registered to Megafone Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 20:36:5B has a network interface built by Megafone Limited.

What is the OUI 20:36:5B?

20:36:5B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Megafone Limited. It covers every address from 20:36:5B:00:00:00 to 20:36:5B:FF:FF:FF, or 16,777,216 addresses in total. It is also written 20-36-5B.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 20:36:5B:00:00:00 that is 20:36:5B — 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 Megafone Limited located?

Megafone Limited is listed at Unit 702,7/F,Bankok Bank Building,NO.18 Bonham Strand West Hong Kong HK 999077 in the IEEE OUI registry entry for 20:36:5B. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does Megafone Limited own?

Megafone Limited holds 3 OUI prefixes in the IEEE registry, of which 20:36:5B is one. A device made by Megafone Limited could carry a MAC address from any of them.

Megafone Limited

MAC address prefix 20:36:5B is registered to Megafone Limited in the IEEE OUI registry. Any device whose MAC address begins with 20:36:5B has a network interface built by Megafone Limited. 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 20:36:5B:00:00:00 to 20:36:5B:FF:FF:FF.

OUI prefix: 20:36:5B
Hyphen form: 20-36-5B
MAC range: 20:36:5B:00:00:00 – 20:36:5B:FF:FF:FF
Addresses in block: 16,777,216
Organization: Megafone Limited
Address: Unit 702,7/F,Bankok Bank Building,NO.18 Bonham Strand West Hong Kong 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 Megafone Limited

Megafone Limited holds 3 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.

2018-12-21Assigned to "Megafone Limited"
archived source →
2026-07-17Assigned to "Megafone Limited"

Nearby in the registry

The prefixes assigned immediately before and after 20:36:5B:

FAQ

Which company owns MAC address prefix 20:36:5B?: MAC address prefix 20:36:5B is registered to Megafone Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 20:36:5B has a network interface built by Megafone Limited.
What is the OUI 20:36:5B?: 20:36:5B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Megafone Limited. It covers every address from 20:36:5B:00:00:00 to 20:36:5B:FF:FF:FF, or 16,777,216 addresses in total. It is also written 20-36-5B.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 20:36:5B:00:00:00 that is 20:36:5B — 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 Megafone Limited located?: Megafone Limited is listed at Unit 702,7/F,Bankok Bank Building,NO.18 Bonham Strand West Hong Kong HK 999077 in the IEEE OUI registry entry for 20:36:5B. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Megafone Limited own?: Megafone Limited holds 3 OUI prefixes in the IEEE registry, of which 20:36:5B is one. A device made by Megafone Limited could carry a MAC address from any of them.