Which company owns MAC address prefix 44:B4:33?

MAC address prefix 44:B4:33 is registered to tide.co.,ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 44:B4:33 has a network interface built by tide.co.,ltd.

What is the OUI 44:B4:33?

44:B4:33 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to tide.co.,ltd. It covers every address from 44:B4:33:00:00:00 to 44:B4:33:FF:FF:FF, or 16,777,216 addresses in total. It is also written 44-B4-33.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 44:B4:33:00:00:00 that is 44:B4:33 — 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 tide.co.,ltd located?

tide.co.,ltd is listed at 9F Kapeul GreatValley A-dong, Digitalro 9-ghil 32, Geumcheon-gu seoul seoul KR ASIKRKS006 in the IEEE OUI registry entry for 44:B4:33. This is the address the organization registered with the IEEE, which may differ from its current operating address.

tide.co.,ltd

MAC address prefix 44:B4:33 is registered to tide.co.,ltd in the IEEE OUI registry. Any device whose MAC address begins with 44:B4:33 has a network interface built by tide.co.,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 44:B4:33:00:00:00 to 44:B4:33:FF:FF:FF.

OUI prefix: 44:B4:33
Hyphen form: 44-B4-33
MAC range: 44:B4:33:00:00:00 – 44:B4:33:FF:FF:FF
Addresses in block: 16,777,216
Organization: tide.co.,ltd
Address: 9F Kapeul GreatValley A-dong, Digitalro 9-ghil 32, Geumcheon-gu seoul seoul KR ASIKRKS006
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 "tide.co.,ltd"
archived source →
2026-07-17Assigned to "tide.co.,ltd"

Nearby in the registry

The prefixes assigned immediately before and after 44:B4:33:

FAQ

Which company owns MAC address prefix 44:B4:33?: MAC address prefix 44:B4:33 is registered to tide.co.,ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 44:B4:33 has a network interface built by tide.co.,ltd.
What is the OUI 44:B4:33?: 44:B4:33 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to tide.co.,ltd. It covers every address from 44:B4:33:00:00:00 to 44:B4:33:FF:FF:FF, or 16,777,216 addresses in total. It is also written 44-B4-33.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 44:B4:33:00:00:00 that is 44:B4:33 — 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 tide.co.,ltd located?: tide.co.,ltd is listed at 9F Kapeul GreatValley A-dong, Digitalro 9-ghil 32, Geumcheon-gu seoul seoul KR ASIKRKS006 in the IEEE OUI registry entry for 44:B4:33. This is the address the organization registered with the IEEE, which may differ from its current operating address.