Which company owns MAC address prefix D4:BD:1E?

MAC address prefix D4:BD:1E is registered to 5VT Technologies,Taiwan LTd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D4:BD:1E has a network interface built by 5VT Technologies,Taiwan LTd..

What is the OUI D4:BD:1E?

D4:BD:1E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to 5VT Technologies,Taiwan LTd.. It covers every address from D4:BD:1E:00:00:00 to D4:BD:1E:FF:FF:FF, or 16,777,216 addresses in total. It is also written D4-BD-1E.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in D4:BD:1E:00:00:00 that is D4:BD:1E — 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 5VT Technologies,Taiwan LTd. located?

5VT Technologies,Taiwan LTd. is listed at 6F,No.19-9,SanChong Rd.,Nangang Dist, Taipei TW 11501 in the IEEE OUI registry entry for D4:BD:1E. This is the address the organization registered with the IEEE, which may differ from its current operating address.

5VT Technologies,Taiwan LTd.

MAC address prefix D4:BD:1E is registered to 5VT Technologies,Taiwan LTd. in the IEEE OUI registry. Any device whose MAC address begins with D4:BD:1E has a network interface built by 5VT Technologies,Taiwan 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 D4:BD:1E:00:00:00 to D4:BD:1E:FF:FF:FF.

OUI prefix: D4:BD:1E
Hyphen form: D4-BD-1E
MAC range: D4:BD:1E:00:00:00 – D4:BD:1E:FF:FF:FF
Addresses in block: 16,777,216
Organization: 5VT Technologies,Taiwan LTd.
Address: 6F,No.19-9,SanChong Rd.,Nangang Dist, Taipei TW 11501
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.

2018-12-21Assigned to "5VT Technologies,Taiwan LTd."
archived source →
2026-07-17Assigned to "5VT Technologies,Taiwan LTd."

Nearby in the registry

The prefixes assigned immediately before and after D4:BD:1E:

FAQ

Which company owns MAC address prefix D4:BD:1E?: MAC address prefix D4:BD:1E is registered to 5VT Technologies,Taiwan LTd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D4:BD:1E has a network interface built by 5VT Technologies,Taiwan LTd..
What is the OUI D4:BD:1E?: D4:BD:1E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to 5VT Technologies,Taiwan LTd.. It covers every address from D4:BD:1E:00:00:00 to D4:BD:1E:FF:FF:FF, or 16,777,216 addresses in total. It is also written D4-BD-1E.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in D4:BD:1E:00:00:00 that is D4:BD:1E — 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 5VT Technologies,Taiwan LTd. located?: 5VT Technologies,Taiwan LTd. is listed at 6F,No.19-9,SanChong Rd.,Nangang Dist, Taipei TW 11501 in the IEEE OUI registry entry for D4:BD:1E. This is the address the organization registered with the IEEE, which may differ from its current operating address.