Which company owns MAC address prefix 78:C4:0E?

MAC address prefix 78:C4:0E is registered to H&D Wireless in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 78:C4:0E has a network interface built by H&D Wireless.

What is the OUI 78:C4:0E?

78:C4:0E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to H&D Wireless. It covers every address from 78:C4:0E:00:00:00 to 78:C4:0E:FF:FF:FF, or 16,777,216 addresses in total. It is also written 78-C4-0E.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 78:C4:0E:00:00:00 that is 78:C4:0E — 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 H&D Wireless located?

H&D Wireless is listed at Sjövägen 17 Solna SE 169 55 in the IEEE OUI registry entry for 78:C4:0E. This is the address the organization registered with the IEEE, which may differ from its current operating address.

H&D Wireless

MAC address prefix 78:C4:0E is registered to H&D Wireless in the IEEE OUI registry. Any device whose MAC address begins with 78:C4:0E has a network interface built by H&D Wireless. 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 78:C4:0E:00:00:00 to 78:C4:0E:FF:FF:FF.

OUI prefix: 78:C4:0E
Hyphen form: 78-C4-0E
MAC range: 78:C4:0E:00:00:00 – 78:C4:0E:FF:FF:FF
Addresses in block: 16,777,216
Organization: H&D Wireless
Address: Sjövägen 17 Solna SE 169 55
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.

2016-07-29Assigned to "H&D Wireless"
archived source →
2026-07-17Assigned to "H&D Wireless"

Nearby in the registry

The prefixes assigned immediately before and after 78:C4:0E:

FAQ

Which company owns MAC address prefix 78:C4:0E?: MAC address prefix 78:C4:0E is registered to H&D Wireless in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 78:C4:0E has a network interface built by H&D Wireless.
What is the OUI 78:C4:0E?: 78:C4:0E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to H&D Wireless. It covers every address from 78:C4:0E:00:00:00 to 78:C4:0E:FF:FF:FF, or 16,777,216 addresses in total. It is also written 78-C4-0E.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 78:C4:0E:00:00:00 that is 78:C4:0E — 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 H&D Wireless located?: H&D Wireless is listed at Sjövägen 17 Solna SE 169 55 in the IEEE OUI registry entry for 78:C4:0E. This is the address the organization registered with the IEEE, which may differ from its current operating address.