Which company owns MAC address prefix 48:7B:5E?

MAC address prefix 48:7B:5E is registered to SMT TELECOMM HK in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 48:7B:5E has a network interface built by SMT TELECOMM HK.

What is the OUI 48:7B:5E?

48:7B:5E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SMT TELECOMM HK. It covers every address from 48:7B:5E:00:00:00 to 48:7B:5E:FF:FF:FF, or 16,777,216 addresses in total. It is also written 48-7B-5E.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 48:7B:5E:00:00:00 that is 48:7B:5E — 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 SMT TELECOMM HK located?

SMT TELECOMM HK is listed at Unit C 8/F Charmhill Centre 50 Hillwood RD. Tsim Sha Tsui Kowloon HK 999077 in the IEEE OUI registry entry for 48:7B:5E. This is the address the organization registered with the IEEE, which may differ from its current operating address.

SMT TELECOMM HK

MAC address prefix 48:7B:5E is registered to SMT TELECOMM HK in the IEEE OUI registry. Any device whose MAC address begins with 48:7B:5E has a network interface built by SMT TELECOMM HK. 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 48:7B:5E:00:00:00 to 48:7B:5E:FF:FF:FF.

OUI prefix: 48:7B:5E
Hyphen form: 48-7B-5E
MAC range: 48:7B:5E:00:00:00 – 48:7B:5E:FF:FF:FF
Addresses in block: 16,777,216
Organization: SMT TELECOMM HK
Address: Unit C 8/F Charmhill Centre 50 Hillwood RD. 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.

Assignment history (2)

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

2020-03-21Assigned to "SMT TELECOMM HK"
archived source →
2026-07-17Assigned to "SMT TELECOMM HK"

Nearby in the registry

The prefixes assigned immediately before and after 48:7B:5E:

FAQ

Which company owns MAC address prefix 48:7B:5E?: MAC address prefix 48:7B:5E is registered to SMT TELECOMM HK in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 48:7B:5E has a network interface built by SMT TELECOMM HK.
What is the OUI 48:7B:5E?: 48:7B:5E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SMT TELECOMM HK. It covers every address from 48:7B:5E:00:00:00 to 48:7B:5E:FF:FF:FF, or 16,777,216 addresses in total. It is also written 48-7B-5E.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 48:7B:5E:00:00:00 that is 48:7B:5E — 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 SMT TELECOMM HK located?: SMT TELECOMM HK is listed at Unit C 8/F Charmhill Centre 50 Hillwood RD. Tsim Sha Tsui Kowloon HK 999077 in the IEEE OUI registry entry for 48:7B:5E. This is the address the organization registered with the IEEE, which may differ from its current operating address.